Abstract
An abrasive wheel includes a wheel body configured to rotate about a rotary shaft, a holder fixed to the wheel body and comprising a plurality of electromagnets, and a plurality of abrasive members configured to grind a substrate, the plurality of abrasive members being detachably fixed respectively to the plurality of electromagnets, where each of the plurality of abrasive members is further configured to be independently replaceable.
Claims
1. An abrasive wheel comprising: a wheel body configured to rotate about a rotary shaft; a holder fixed to the wheel body and comprising a plurality of electromagnets; and a plurality of abrasive members configured to grind a substrate, the plurality of abrasive members being detachably fixed respectively to the plurality of electromagnets, wherein each of the plurality of abrasive members is further configured to be independently replaceable.
2. The abrasive wheel of claim 1, wherein each of the plurality of abrasive members comprises: a coupling portion attached to an electromagnet of the plurality of electromagnets; and an abrasive portion on one side of the coupling portion and configured to grind the substrate.
3. The abrasive wheel of claim 2, wherein each of the plurality of abrasive members further comprises a separator between the coupling portion and the abrasive portion.
4. The abrasive wheel of claim 1, wherein the holder comprises a plurality of seating portions, each of the plurality of seating portions comprising a groove configured to receive a portion of a respective abrasive member of the plurality of abrasive members; and wherein the plurality of electromagnets are on respective inner surfaces of the plurality of seating portions.
5. An abrasive member replacement device comprising: an abrasive wheel comprising: a wheel body configured to rotate about a rotary shaft, a holder on the wheel body and comprising an electromagnet, and an abrasive member attached to the electromagnet and configured to grind a substrate; and a replacement assembly comprising a conveyor belt adjacent to at least a portion of the holder and configured to provide abrasive members in one direction.
6. The abrasive member replacement device of claim 5, further comprising a support portion on an upper surface of the conveyor belt and configured to support an abrasive member.
7. The abrasive member replacement device of claim 5, further comprising: a supply assembly connected to a first side of the replacement assembly and configured to supply the conveyor belt to the replacement assembly; and a collection assembly connected to a second side of the replacement assembly and configured to collect the conveyor belt from the replacement assembly.
8. The abrasive member replacement device of claim 7, wherein the supply assembly is further configured to supply a replacement abrasive member on an upper surface of the conveyor belt to the replacement assembly.
9. The abrasive member replacement device of claim 7, wherein the collection assembly is further configured to collect a worn abrasive member separated from the electromagnet and arranged on an upper surface of the conveyor belt.
10. The abrasive member replacement device of claim 7, wherein the supply assembly comprises a supply shaft parallel to the rotary shaft of the abrasive wheel, wherein the conveyor belt is wound around the supply shaft, and wherein the conveyor belt on which a replacement abrasive member is arranged is provided to the replacement assembly as the supply shaft rotates.
11. The abrasive member replacement device of claim 10, wherein the collection assembly comprises a collection shaft parallel to the supply shaft, wherein the conveyor belt is wound around the collection shaft, and wherein the conveyor belt is collected from the replacement assembly as the collection shaft rotates.
12. The abrasive member replacement device of claim 11, wherein the supply shaft and the collection shaft are arranged in the same direction with respect to the rotary shaft of the abrasive wheel.
13. The abrasive member replacement device of claim 11, wherein the supply shaft and the collection shaft are arranged in opposite directions with respect to the rotary shaft of the abrasive wheel.
14. The abrasive member replacement device of claim 5, further comprising a controller configured to control on and off states of the electromagnet.
15. The abrasive member replacement device of claim 5, further comprising a wear detector configured to detect a degree of wear of the abrasive member attached to the electromagnet.
16. The abrasive member replacement device of claim 15, wherein the wear detector is arranged in proximity to the conveyor belt of the replacement assembly and below the holder.
17. An abrasive member replacement method comprising: rotating an abrasive wheel about a rotary shaft, the abrasive wheel comprising a holder and an abrasive member attached to an electromagnet of the holder; separating a worn abrasive member from the electromagnet by setting, by a controller, the electromagnet to an off state; supplying, by a conveyor belt of supply assembly, a replacement abrasive member to a replacement assembly; attaching the replacement abrasive member that is on the conveyor belt to the electromagnet by setting, by the controller, the electromagnet to an on state; and collecting, by a collection assembly, the worn abrasive member from the conveyor belt of the replacement assembly.
18. The abrasive member replacement method of claim 17, further comprising detecting, by a wear detector, a degree of wear of the abrasive member attached to the electromagnet.
19. The abrasive member replacement method of claim 18, wherein the worn abrasive member is separated from the electromagnet based on the degree of wear detected by the wear detector.
20. The abrasive member replacement method of claim 19, wherein the separating the worn abrasive member from the electromagnet further comprises, based on the worn abrasive member being located above the conveyor belt of the replacement assembly, arranging the worn abrasive member on an upper surface of the conveyor belt of the replacement assembly by setting, by the controller, the electromagnet to the off state.
Description
BRIEF DESCRIPTION OF DRAWINGS
[0014] The above and other aspects, features, and advantages of certain example embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:
[0015] FIG. 1 is a diagram illustrating an abrasive wheel according to one or more embodiments;
[0016] FIG. 2 is a diagram illustrating an abrasive member of an abrasive wheel according to one or more embodiments;
[0017] FIGS. 3A-3C are diagrams illustrating the abrasive member of FIG. 2 according to one or more embodiments
[0018] FIG. 4 is a diagram illustrating an abrasive wheel according to one or more embodiments;
[0019] FIG. 5 is a diagram illustrating an abrasive wheel according to one or more embodiments;
[0020] FIGS. 6 to 17 are diagrams illustrating abrasive members according to one or more embodiments;
[0021] FIGS. 18A and 18B are diagrams illustrating holders of abrasive wheels according to one or more embodiments;
[0022] FIGS. 19A, 19B and 19C are diagrams illustrating a process in which an abrasive member of an abrasive wheel is worn in an abrasive member replacement device according to one or more embodiments;
[0023] FIG. 20 is a diagram illustrating the abrasive member replacement device of FIGS. 19A-19C, as viewed from below, according to one or more embodiments;
[0024] FIG. 21 is a diagram illustrating an abrasive member replacement device as viewed from a side according to one or more embodiments;
[0025] FIG. 22 is a diagram illustrating an abrasive member replacement device as viewed from below according to one or more embodiments;
[0026] FIG. 23 is a diagram illustrating an abrasive member replacement device as viewed from below, according to one or more embodiments;
[0027] FIG. 24 is a diagram illustrating an abrasive member replacement device as viewed from a side, according to one or more embodiments;
[0028] FIG. 25 is a diagram illustrating the abrasive member replacement device of FIG. 24, as viewed from below, according to one or more embodiments;
[0029] FIG. 26 is a diagram illustrating an abrasive member replacement device as viewed from a side, according to one or more embodiments;
[0030] FIG. 27 is a diagram illustrating the abrasive member replacement device of FIG. 26, as viewed from below, according to one or more embodiments;
[0031] FIG. 28 is a diagram illustrating a configuration of an abrasive member replacement device according to one or more embodiments;
[0032] FIGS. 29A to 32C are diagrams illustrating processes of replacing an abrasive member using an abrasive member replacement device, according to one or more embodiments;
[0033] FIG. 33 is a diagram illustrating an abrasive member replacement device according to one or more embodiments;
[0034] FIGS. 34A to 35D are diagrams illustrating processes of replacing an abrasive member using the abrasive member replacement device according to one or more embodiments;
[0035] FIG. 36 is a diagram illustrating an abrasive member replacement device according to one or more embodiments; and
[0036] FIG. 37 is a flowchart illustrating a method of replacing an abrasive member according to one or more embodiments.
DETAILED DESCRIPTION
[0037] Hereinafter, example embodiments of the disclosure will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and redundant descriptions thereof will be omitted. The embodiments described herein are example embodiments, and thus, the disclosure is not limited thereto and may be realized in various other forms.
[0038] The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.
[0039] In addition, the size and thickness of each configuration shown in the drawings are arbitrarily shown for understanding and ease of description, but the present disclosure is not limited thereto. In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. In the drawings, for understanding and ease of description, the thickness of some layers and areas is exaggerated.
[0040] As used herein, expressions such as at least one of, when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, the expression, at least one of a, b, and c, should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0041] It will be understood that when an element or layer is referred to as being over, above, on, below, under, beneath, connected to or coupled to another element or layer, it may be directly over, above, on, below, under, beneath, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being directly over, directly above, directly on, directly below, directly under, directly beneath, directly connected to or directly coupled to another element or layer, there are no intervening elements or layers present.
[0042] Hereinafter, an abrasive wheel 100, an abrasive member replacement device 200, and an abrasive member replacement method according to one or more embodiments will be described in more detail with reference to the drawings.
[0043] FIG. 1 is a diagram illustrating an abrasive wheel according to one or more embodiments.
[0044] As shown in FIG. 1, an abrasive wheel 100 according to one or more embodiments may include a wheel body 110 that rotates about a rotary shaft 112, a holder 120 fixed to the wheel body 110 and including a plurality of electromagnets 124 provided along a lower surface of the wheel body 110, and a plurality of abrasive members 130 detachably fixed to the plurality of electromagnets 124 and configured to grind an upper surface of a substrate 1. Each abrasive member 130 of the plurality of abrasive members 130 may be independently replaceable.
[0045] The holder 120 may include seating portions 122 each having a groove shape of a size in which a portion of each abrasive member 130 may be seated, and the electromagnets 124 may be arranged on an inner surface of the seating portion 122.
[0046] Each abrasive member 130 may include a coupling portion 132 attached to the electromagnet 124 provided in the holder 120 and an abrasive portion 136 arranged on one side of the coupling portion 132 to grind the upper surface of the substrate 1.
[0047] The coupling portion 132 may be configured to be attached to and detached from to the electromagnet 124, and may be made of metal. The electromagnet 124 may alternatively be a standard magnet (i.e., a magnet that is not configured between an off/on state by a controller), and a combination of electromagnets and standard magnets may be implemented.
[0048] Referring to FIG. 1, when a portion that is attached to the electromagnet 124 of the holder 120 is referred to as an upper end of the abrasive member 130, the abrasive portion 136 may be arranged at a lower end of the abrasive member 130.
[0049] Referring to FIG. 1, the seating portion 122 in a state where the electromagnet 124 is arranged may have a groove, and the groove may be large enough to allow the upper end of each abrasive member 130 to be seated.
[0050] FIG. 2 is a diagram illustrating an abrasive member of an abrasive wheel according to one or more embodiments, FIGS. 3A-3C are diagrams illustrating the abrasive member of FIG. 2 according to one or more embodiments. FIG. 4 is a diagram illustrating an abrasive wheel according to one or more embodiments.
[0051] First, as shown in FIGS. 2 to 4, an abrasive member 130 may include a coupling portion 132 located at an upper end and attached to the electromagnet 124 of the holder 120, a separator 134 arranged between the coupling portion 132 and an abrasive portion 136, and the abrasive portion 136 arranged at a lower end to grind an upper surface of the substrate 1. That is, the abrasive member 130 shown in FIG. 2 may further include the separator 134 arranged between the coupling portion 132 and the abrasive portion 136.
[0052] The abrasive member 130 may have a structure such that the coupling portion 132 is arranged on an upper portion of the separator 134, and the abrasive portion 136 is arranged on a lower portion of the separator 134. The separator 134 may be arranged between the coupling portion 132 and the abrasive portion 136 to serve to attach the abrasive portion 136 to the coupling portion 132.
[0053] The abrasive portion 136 may be made of abrasive particles 137 and an adhesive 138. The abrasive portion 136 may be in a state in which diamond powder, which may correspond to the abrasive particles 137, is mixed with the adhesive 138 and sintered. The adhesive 138 may be a synthetic resin, but embodiments are not limited thereto.
[0054] FIGS. 3A-3C illustrate a process of removing the worn abrasive portion 136 from the abrasive member 130 in the abrasive member 130 of FIG. 2 and attaching a new abrasive portion 136 to the abrasive member 130.
[0055] First, FIG. 3A shows the abrasive member 130 including the coupling portion 132, the separator 134, and the abrasive portion 136. A length in a vertical direction of the abrasive portion 136 of the abrasive member 130 may be shortened. That is, the abrasive portion 136 shown in FIG. 3A is in a state of being worn to some extent after a grinding process.
[0056] FIG. 3B is a diagram showing an aspect where the abrasive portion 136 attached to the lower portion of the separator 134 in FIG. 3A has been removed. The separator 134 may serve to connect the coupling portion 132 and the abrasive portion 136 to each other while simultaneously and easily separating the abrasive portion 136 from the coupling portion 132.
[0057] Accordingly, the separator 134 may be arranged on the lower portion of the coupling portion 132, such that in the process of removing the worn abrasive portion 136 from the separator 134, the coupling portion 132 of the abrasive member 130 may be prevented from being damaged as compared with a case where the separator 134 is not provided.
[0058] FIG. 3C is a diagram showing an aspect where a new abrasive portion 136 is attached to the abrasive member 130 from which the worn abrasive portion 136 has been removed as shown in FIG. 3B. A length of the abrasive portion 136 shown in FIG. 3C is longer compared to the length of the abrasive portion 136 shown in FIG. 3A. As shown in FIG. 3A, the new abrasive portion 136 may be attached to the lower portion of the separator 134.
[0059] FIG. 4 is a diagram showing an abrasive wheel 100 including the abrasive member 130, in which it may be seen that the abrasive member 130 including the separator 134 may be detachably fixed to the electromagnet 124 of the holder 120.
[0060] As in FIG. 1, the holder 120 shown in FIG. 4 may include a plurality of seating portions 122 each having a groove of a size in which an upper end of each abrasive member 130 may be seated, and a plurality of electromagnets 124 each arranged on an inner surface of each of the plurality of seating portions 122. A groove having a certain depth may be provided in a lower portion of the holder 120, and the coupling portion 132 may be arranged to surround an inner surface of the groove.
[0061] The abrasive member 130 shown in FIG. 4 has a structure including the separator 134, and is different from FIG. 1 in that both the electromagnet 124 and the separator 134 of the abrasive member 130 may be seated inside the groove of the seating portion 122 of FIG. 4.
[0062] FIG. 4 shows both the electromagnet 124 and the separator 134 being seated in the groove of the seating portion 122, but the position where the abrasive member 130 is arranged in the seating portion 122 is not limited to the shown position.
[0063] For example, only the electromagnet 124 may be seated on the seating portion 122, or the electromagnet 124 and only a portion of the separator 134 may be seated on the seating portion 122. This may vary depending on a depth of the groove of the seating portion 122 and lengths of the electromagnet 124 and the separator 134.
[0064] However, the abrasive portion 136 arranged at the lower end of the abrasive member 130 serves to grind the substrate 1 while being in contact with an upper surface of the substrate 1 at the lower surface, so the abrasive portion 136 may not be seated in the groove of the seating portion 122.
[0065] In addition, FIG. 4 shows an aspect where the electromagnet 124 is surrounded by all inner surfaces of the seating portion 122. However, embodiments are not limited thereto, and the electromagnet 124 arranged on the inner surface of the seating portion 122 may be arranged on at least one surface of the seating portion 122.
[0066] As the number of inner surfaces of the seating portion 122 on which the electromagnet 124 is arranged increases, a magnetic force generated between the coupling portion 132 of the abrasive member 130 and the electromagnet 124 becomes stronger. Accordingly, the electromagnet 124 may be arranged on all inner surfaces of the seating portion 122.
[0067] FIG. 5 is a diagram illustrating an abrasive wheel according to one or more embodiments.
[0068] FIG. 5 is a diagram illustrates an abrasive wheel 100 including an abrasive member 130. The abrasive member 130 including the separator 134 may be detachably fixed to the electromagnet 124 of the holder 120.
[0069] In FIG. 4, the seating portion 122 on which the electromagnet 124 is arranged may have a groove. In FIG. 5, the electromagnet 124 may be arranged on the inner surface of the seating portion 122, and the groove of the seating portion 122 may be accordingly filled by the electromagnet 124.
[0070] In FIG. 5, the holder 120 may include the seating portion 122 having a groove shape, and the electromagnet 124 arranged on the inner surface of the seating portion 122. However, the electromagnet 124 arranged on the inner surface of the seating portion 122 may have the same shape as the shape of the groove of the seating portion 122, and as the electromagnet 124 is arranged on the seating portion 122, the groove of the seating portion 122 may be filled.
[0071] In this case, the coupling portion 132 arranged on the upper portion of the abrasive member 130 may be attached to a flat lower portion of the electromagnet 124. In this case, the contact surface between the coupling portion 132 of the abrasive member 130 and the electromagnet 124 of the holder 120 may be only one surface. Therefore, the strong magnetic force may not generated between the abrasive member 130 and the electromagnet 124 of the holder 120. That is, the magnetic force generated between the abrasive member 130 and the holder 120 may be stronger in FIG. 4 than in FIG. 5.
[0072] In addition, although FIG. 5 shows the case where the groove of the seating portion 122 is completely filled, the shape of the electromagnet 124 is not limited to the shown example.
[0073] For example, the length (height) of the electromagnet 124 may be shorter than the depth of the groove of the seating portion 122. In this case, even after the electromagnet 124 is seated on the seating portion 122, the groove of the seating portion 122 may remain unfilled partially. The upper portion of the abrasive member 130 may be partially inserted into the groove of the seating portion 122, and the coupling portion 132 arranged at the upper portion of the abrasive member 130 may be inserted into the groove so that one surface is attached to the flat lower portion of the electromagnet 124.
[0074] FIGS. 6 to 17 are diagrams illustrating abrasive members according to one or more embodiments.
[0075] FIGS. 6 to 17 show various abrasive members 130 and various types of seating portions 122 on which each abrasive member 130 is seated.
[0076] In FIGS. 6 to 17, the groove of the seating portion 122 may be unfilled in a state in which the electromagnet 124 is arranged in the seating portion 122, and the coupling portion 132 of the abrasive member 130 is inserted and seated in the groove.
[0077] As shown in FIG. 6, the groove of the seating portion 122 may have a rectangular cross-section. The coupling portion 132 of the abrasive member 130 that is attached to the electromagnet 124 may have a rectangular cross-section of a size that may be seated in the groove of the seating portion 122 (that is, the groove surrounded by the electromagnet 124).
[0078] As shown in FIG. 7, the groove of the seating portion 122 may have a pentagonal cross-section. The coupling portion 132 of the abrasive member 130 that is attached to the electromagnet 124 may have a pentagonal cross-section of a size that may be seated in the groove of the seating portion 122 (that is, the groove surrounded by the electromagnet 124).
[0079] As shown in FIG. 8, the groove of the seating portion 122 may have a trapezoidal cross-section. The coupling portion 132 of the abrasive member 130 that is attached to the electromagnet 124 may have a trapezoidal cross-section of a size that may be seated in the groove of the seating portion 122 (that is, the groove surrounded by the electromagnet 124).
[0080] FIGS. 9 to 11 depict embodiments that are similar in shape to the seating portions 122 and the coupling portions 132 of the abrasive members 130 shown in FIGS. 6 to 8 but have different horizontal and vertical ratios. First, FIG. 9 shows a structure in which the seating portion 122 and the coupling portion 132 have a rectangular cross-section but the vertical length is shorter compared to FIG. 6.
[0081] FIG. 10 shows a structure in which the seating portion 122 and the coupling portion 132 have a pentagonal cross-section but the vertical length is shorter compared to FIG. 7. FIG. 11 shows a structure in which the seating portion 122 and the coupling portion 132 have a trapezoidal cross-section but the vertical length is shorter compared to FIG. 8.
[0082] FIGS. 12 to 14 depict embodiments that are similar in shape to the seating portions 122 and the coupling portions 132 of the abrasive members 130 shown in FIGS. 6 to 8 but have different horizontal and vertical ratios. Additionally, FIGS. 12 to 14 show embodiments in which the horizontal lengths of the coupling portion 132 of the abrasive member 130 and the separator 134 are different from each other.
[0083] FIGS. 12 to 14 show cases where the shown seating portion 122 and the coupling portion 132 of the abrasive member 130 have rectangular, pentagonal, and trapezoidal cross-sections, respectively, and the horizontal length of the coupling portion 132 is longer than the horizontal length of the separator 134.
[0084] FIGS. 15 to 17 depict embodiments that are similar in shape to the seating portions 122 and the coupling portions 132 of the abrasive members 130 shown in FIGS. 6 to 8 but have different horizontal and vertical ratios and the horizontal lengths of the coupling portion 132 of the abrasive member 130 and the separator 134 are different from each other.
[0085] FIGS. 15 to 17 show cases where the shown seating portion 122 and the coupling portion 132 of the abrasive member 130 have rectangular, pentagonal, and trapezoidal cross-sections, respectively, and the horizontal length of the coupling portion 132 is shorter than the horizontal length of the separator 134.
[0086] Comparing FIGS. 12 to 14 and FIGS. 15 to 17, assuming that the horizontal length of the separator 134 is substantially the same, the embodiments shown in FIGS. 12 to 14 may have an advantage in that an attachment area between the separator 134 and the electromagnet 124 is greater, and therefore the adhesive force between the electromagnet 124 and the separator 134 is higher. In addition, the magnetic force generated between the electromagnet 124 and the coupling portion 132 of the abrasive member 130 is also higher in the embodiments shown in FIGS. 12 to 14 in that an area where the electromagnet 124 is arranged is greater compared to FIGS. 15 to 17.
[0087] The shape of the abrasive member 130 and the seating portion 122 according to one or more embodiments is not limited to the shapes shown in FIGS. 6 to 17. The seating portion 122 may have various structures that may seat the abrasive member 130 in the groove while having the electromagnet 124 on the inner surface. The seating portion 122 and the abrasive member 130 may be of various shapes.
[0088] FIGS. 18A and 18B are diagrams illustrating holders of abrasive wheels according to one or more embodiments.
[0089] FIG. 18A shows the holder 120 of FIGS. 1, 4, and 5, as viewed from below. The holder 120 shown in FIG. 18A has a plurality of electromagnets 124 split along a circumference.
[0090] The plurality of electromagnets 124 in FIG. 18A may have such a shape that the electromagnets 124 are arranged on the inner surface of each of the plurality of seating portions 122 each having a groove shape arranged in the holder 120 (refer to the structure of the electromagnet 124 arranged on the inner surface of the seating portion 122 in FIG. 1).
[0091] FIG. 18B shows an embodiment in which four electromagnets 124 are arranged, FIG. 18A. However, as in FIG. 18A, the electromagnets 124 may be each arranged on the inner surface of each of the seating portions 122.
[0092] An abrasive member replacement device 200 that replaces the worn abrasive member 130 worn in the abrasive wheel 100 with a new replacement abrasive member 130 will be described with reference to FIGS. 19A to 36.
[0093] As described in FIGS. 1 to 17, the abrasive wheel 100 may include a wheel body 110 that rotates about a rotary shaft 112, a holder 120 fixed to a lower portion of the wheel body 110 and having a plurality of electromagnets 124 arranged along a lower surface, and a plurality of abrasive members 130 detachably fixed to the plurality of electromagnets 124 and provided to grind an upper surface of a substrate 1, where each abrasive member 130 may include a coupling portion 132 that is attached to the electromagnet 124.
[0094] The abrasive wheel 100 may adjust the magnetic force generated between the electromagnet 124 and the coupling portion 132, thereby independently replacing a worn abrasive member 130 of the plurality of abrasive members 130 attached to the electromagnets 124.
[0095] Referring to FIGS. 19A to 35 to be described below, the abrasive member replacement device 200 according to one or more embodiments may be a device for replacing the abrasive member 130 in the abrasive wheel 100, and may include the abrasive wheel 100 and a replacement assembly 220 including a conveyor belt 210 arranged adjacent to at least a part of the holder 120 and capable of conveying the abrasive member 130 in one direction.
[0096] A method of replacing the abrasive member 130 in the abrasive wheel 100 using the abrasive member replacement device 200 will be described with reference to FIGS. 19A to 37.
[0097] FIGS. 19A, 19B and 19C are diagrams illustrating a process in which an abrasive member of an abrasive wheel is worn in an abrasive member replacement device according to one or more embodiments. FIG. 20 is a diagram illustrating the abrasive member replacement device of FIGS. 19A-19C, as viewed from below, according to one or more embodiments.
[0098] The abrasive member replacement device 200 according to one or more embodiments may include an abrasive wheel 100 and a replacement assembly 220. The replacement assembly 220 may be arranged below the holder 120 so that an upper surface of the conveyor belt 210 on which the abrasive member 130 is arranged faces at least a portion of the holder 120 of the abrasive wheel 100.
[0099] In addition, the abrasive member replacement device 200 may further include a supply assembly 230 that is connected to one side of the replacement assembly 220 and supplies the conveyor belt 210 to the replacement assembly 220, and a collection assembly 240 that is connected to the other side of the replacement assembly 220 and collects the conveyor belt 210 discharged from the replacement assembly 220.
[0100] FIGS. 19A-19C are diagrams of the abrasive member replacement device 200 as viewed from a side. A substrate 1 may be arranged below at least a portion of the abrasive wheel 100, and the conveyor belt 210 of the replacement assembly 220, which is a component of the abrasive member replacement device 200 according to one or more embodiments, may be arranged below the abrasive wheel 100 at a position other than a position where the substrate 1 is arranged.
[0101] FIGS. 19A-19C, the conveyor belt 210 of the replacement assembly 220, which is a component of the abrasive member replacement device 200, may be arranged at a position opposite to the position where the substrate 1 is arranged, and the conveyor belt 210 of the replacement assembly 220 may be arranged to face the lower surface of the holder 120.
[0102] FIG. 19A shows a state in which a portion of the abrasive wheel 100 is arranged on a portion of the upper surface of the substrate 1, and FIG. 19B shows a process in which the abrasive member 130 (specifically, the abrasive portion 136) of the abrasive wheel 100 grinds the upper surface of the substrate 1 while the substrate 1 and the abrasive wheel 100 rotate around their respective shafts in the state arranged as shown in FIG. 19A.
[0103] In FIG. 19B, an aspect is shown in which the abrasive member 130 grinds the upper surface of the substrate 1, so that a portion of the substrate 1 is ground and thus thinned.
[0104] FIG. 19C shows an aspect in which as the abrasive member 130 contacts the upper surface of the substrate 1 to continuously grind the substrate 1. The entire upper surface of the substrate 1 may be ground and thus thinned. In addition, an aspect is also shown in which the abrasive portion 136 of the abrasive member 130 attached to the abrasive wheel 100 is worn and is thinner than the abrasive portion 136 in FIGS. 19A and 19B.
[0105] In FIGS. 19A and 19B, the abrasive portion 136 of the abrasive member 130 attached to the electromagnet 124 is not worn, so there is no need to replace the abrasive member 130.
[0106] In FIG. 19C, the abrasive portion 136 of the abrasive member 130 attached to the electromagnet 124 is in a worn state, and the conveyor belt 210 of the replacement assembly 220 may move toward the direction in which the abrasive wheel 100 is arranged, in order to replace the worn abrasive member 130. That is, the conveyor belt 210 of the replacement assembly 220 may move along an x-axis direction. Referring to FIG. 20, an aspect is shown in which the conveyor belt 210 of the supply assembly 230 has been moved to the replacement assembly 220.
[0107] Accordingly, the conveyor belt 210 of the supply assembly 230 on which a new abrasive member 130 (replacement abrasive member) is arranged may move toward the replacement assembly 220, and therefore the new replacement abrasive member 130 may also be arranged on the conveyor belt 210 of the replacement assembly 220.
[0108] The replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 may include an unworn abrasive portion 136 that is different from the worn abrasive member 130 attached to the electromagnet 124 and including a worn abrasive portion 136.
[0109] The abrasive member replacement device 200 according to one or more embodiments may separate the worn abrasive member 130 attached to the electromagnet 124 from the electromagnet 124, and then attach the new replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 to the electromagnet 124.
[0110] FIG. 19C may correspond to an operation in which the abrasive wheel 100 with the abrasive member 130 attached to the electromagnet 124 is rotated about the rotary shaft 112 and an operation in which the conveyor belt 210 loaded with the new replacement abrasive member 130 is supplied to the replacement assembly 220, in a method of replacing the abrasive member 130.
[0111] FIG. 20 is a view of the abrasive wheel 100 as viewed from below the substrate 1 and the conveyor belt 210 of the replacement assembly 220 shown in FIGS. 19A-19C.
[0112] In FIG. 20, the substrate 1 is shown to be concealed by the abrasive wheel 100, which is to illustrate the arrangement relationship of the abrasive member replacement device 200. The substrate 1 and the conveyor belt 210 of the replacement assembly 220 may be arranged below the abrasive wheel 100 (see FIGS. 19A-19C), and in FIG. 20, a portion of the abrasive wheel 100 may be arranged to be concealed by the substrate 1.
[0113] In FIGS. 21 to 27 and FIGS. 29A to 36 to be described below, the substrate 1 is omitted.
[0114] Referring to FIG. 20, the substrate 1 may be arranged below at least a portion of the abrasive wheel 100, and the conveyor belt 210 of the replacement assembly 220 may be arranged at a position opposite to the position where the substrate 1 is arranged.
[0115] FIGS. 19A-19C are side views when viewed from reference numeral S2 of FIG. 20, and the configuration of the supply assembly 230 and the collection assembly 240 is not shown in FIGS. 19A-19C. However, FIG. 20 shows the abrasive member replacement device 200 as viewed from below, and the replacement assembly 220, the supply assembly 230, and the collection assembly 240, which are components of the abrasive member replacement device 200, are all shown in FIG. 20.
[0116] That is, in FIG. 20, the supply assembly 230 that is connected to one side of the replacement assembly 220 and supplies the conveyor belt 210 to the replacement assembly 220, and the collection assembly 240 that is connected to the other side of the replacement assembly 220 and collects the conveyor belt 210 discharged from the replacement assembly 220 are shown.
[0117] For reference, FIG. 20 shows the abrasive member replacement device 200 as viewed from below. However, the abrasive member 130 arranged on the upper surface of the conveyor belt 210 is also shown in order to show the abrasive member 130 arranged on the conveyor belt 210. The abrasive member 130 shown to overlap the conveyor belt 210 is substantially arranged on the upper surface of the conveyor belt 210.
[0118] The supply assembly 230 may supply a new replacement abrasive member 130 arranged on the upper surface of the conveyor belt 210 to the replacement assembly 220. The collection assembly 240 may collect, from the replacement assembly 220, the worn abrasive member 130 separated from the electromagnet 124 and arranged on the upper surface of the conveyor belt 210.
[0119] The supply assembly 230 may include a supply shaft 232 extending perpendicular to the direction in which the conveyor belt 210 is supplied toward the replacement assembly 220 and extending parallel to the rotary shaft 112 of the abrasive wheel 100, and a conveyor belt 210 wound around the supply shaft 232. As the supply shaft 232 rotates, the conveyor belt 210 with a new replacement abrasive member 130 arranged thereon may be supplied to the replacement assembly 220.
[0120] The collection assembly 240 may include a collection shaft 242 extending in a direction parallel to the supply shaft 232 and including a conveyor belt 210 wound around the collection shaft 242. As the collection shaft 242 rotates, the conveyor belt 210 may be collected from the replacement assembly 220.
[0121] FIG. 20 may correspond to an operation in which the abrasive wheel 100 with the abrasive member 130 attached thereto is rotated about the rotary shaft 112 and an operation in which the conveyor belt 210 loaded with the new replacement abrasive member 130 is supplied to the replacement assembly 220 by the supply assembly 230. Additionally, an operation in which the collection assembly 240 collects the conveyor belt 210 coming out from the replacement assembly 220 may be included.
[0122] FIGS. 21 to 27 are diagrams illustrating an operation in which the abrasive wheel 100 with the abrasive member 130 attached thereto is rotated about the rotary shaft 112, an operation in which the conveyor belt 210 loaded with the new replacement abrasive member 130 is supplied to the replacement assembly 220 by the supply assembly 230, and an operation in which the collection assembly 240 collects the conveyor belt 210 from the replacement assembly 220.
[0123] The embodiments shown in FIGS. 21 to 27 may correspond to embodiments in which the shape of the abrasive wheel 100 is the same as that of FIGS. 19A to 20, but the structures of the supply assembly 230, the replacement assembly 220, and the collection assembly 240 arranged close to the abrasive wheel 100 may vary as will be understood by one of ordinary skill in the art from the disclosure herein.
[0124] FIG. 21 is a diagram illustrating an abrasive member replacement device as viewed from a side according to one or more embodiments.
[0125] FIG. 21 is a diagram showing a structure corresponding to FIG. 20, viewed from reference numeral S1 shown in FIG. 20. Accordingly, FIG. 21 depicts a structure in which the replacement assembly 220 is arranged below the abrasive wheel 100, the supply assembly 230 that supplies the conveyor belt 210 to the replacement assembly 220 is connected to one side of the replacement assembly 220, and the collection assembly 240 that collects the conveyor belt 210 discharged from the replacement assembly 220 is connected to the other side of the replacement assembly 220.
[0126] In FIG. 20, the supply assembly 230 and the collection assembly 240 each have a conveyor structure wound around the supply shaft 232 and the collection shaft 242 each extending the direction parallel to the rotary shaft 112 of the abrasive wheel 100. In FIG. 21, the corresponding supply shaft 232 and collection shaft 242 are omitted.
[0127] FIG. 22 is a diagram illustrating an abrasive member replacement device as viewed from below according to one or more embodiments.
[0128] FIG. 22 is different from FIG. 20, in that the supply assembly 230 and the collection assembly 240 include only the conveyor belt 210 aligned in a row. The conveyor belt 210, which is not wound around the supply shaft 232 and the collection shaft 242 but is aligned in a row, may be configured such that the conveyor belt 210 is supplied toward the replacement assembly 220 or collected from the replacement assembly 220 by drivers connected to the supply assembly 230 and the collection assembly 240.
[0129] FIG. 23 is a diagram illustrating an abrasive member replacement device as viewed from below, according to one or more embodiments. FIG. 23 includes features similar to those shown in FIG. 21, but is a view in which the substrate 1 is omitted.
[0130] The supply assembly 230 shown in FIG. 23 may include a supply shaft 232 and a conveyor belt 210 wound around the supply shaft 232, and the collection assembly 240 may include a collection shaft 242 extending in a direction parallel to the supply shaft 232 and a conveyor belt 210 wound around the collection shaft 242.
[0131] As shown in FIG. 23, the supply shaft 232 of the supply assembly 230 and the collection shaft 242 of the collection assembly 240 may be arranged in opposite directions with respect to the rotary shaft 112 of the abrasive wheel 100, as in FIG. 23.
[0132] The supply assembly 230 may supply the conveyor belt 210 on which the new replacement abrasive member 130 is arranged to the replacement assembly 220 by the rotation of the supply shaft 232, and the collection assembly 240 may collect the conveyor belt 210 from the replacement assembly 220 by the rotation of the collection shaft 242.
[0133] FIG. 24 is a diagram illustrating an abrasive member replacement device as viewed from a side, according to one or more embodiments. FIG. 25 is a diagram illustrating the abrasive member replacement device of FIG. 24, as viewed from below, according to one or more embodiments.
[0134] Referring to FIGS. 24 and 25, the conveyor belt 210 of the replacement assembly 220 may be arranged below at least a portion of the abrasive wheel 100. The supply assembly 230 may include a supply shaft 232 and a conveyor belt 210 wound around the supply shaft 232, and the collection assembly 240 may include a collection shaft 242 and a conveyor belt 210 wound around the collection shaft 242.
[0135] As shown in FIG. 25, the supply shaft 232 of the supply assembly 230 and the collection shaft 242 of the collection assembly 240 may be arranged in the same direction with respect to the rotary shaft 112 of the abrasive wheel 100.
[0136] In this case, the replacement assembly 220, the supply assembly 230, and the collection assembly 240 may be arranged on one plane, as shown in FIG. 24. Specifically, the conveyor belt 210 wound around the supply shaft 232 and the collection shaft 242 may begin to be wound from the supply shaft 232 and the collection shaft 242 and then wound around itself to be contained in a single layer form.
[0137] The supply assembly 230 may supply the conveyor belt 210 on which the new replacement abrasive member 130 is arranged to the replacement assembly 220 by the rotation of the supply shaft 232. The supply assembly 230 may be connected to one side of the replacement assembly 220, and may supply the conveyor belt 210 to one side of the replacement assembly 220.
[0138] The collection assembly 240 may collect the conveyor belt 210 from the replacement assembly 220 by the rotation of the collection shaft 242. That is, the collection assembly 240 may collect the conveyor belt 210 that has passed the replacement assembly 220.
[0139] In FIG. 25 and the drawings described below, the following description will be given with respect to the shape of the abrasive member 130 shown on the conveyor belt 210.
[0140] As shown in FIG. 24, the abrasive member 130 arranged on the upper surface of the conveyor belt 210 may have such a shape that a lower end of the abrasive member 130 (that is, the abrasive portion 136) contacts the conveyor belt 210 and an upper end of the abrasive member 130 (that is, the coupling portion 132) is arranged to face the electromagnet 124. The abrasive member 130 may have a rectangular shape when viewed from a side.
[0141] However, the shapes of the abrasive member 130 and the electromagnet 124 to which the abrasive member 130 is attached may vary, as described above with respect to FIGS. 6-17. The shape of the abrasive members 130 shown in various figures is depicted for ease of description, and may indicate a position of the conveyor belt 210 where the abrasive member 130 arranged on the conveyor belt 210, while not considering the vertical relationship of the abrasive member 130 arranged on the conveyor belt 210 or the actual shape of the abrasive member 130.
[0142] In addition, the shape of the electromagnet 124 arranged on the holder 120 may also vary as described above. The shape of the electromagnets 124 shown in various figures is depicted for ease of description, and may indicate the position of the electromagnet 124 arranged on the circumference of the holder 120. That is, the shape of the electromagnet 124 may be shown without considering the shape and coupling direction of the abrasive member 130 to be attached to the electromagnet 124.
[0143] Thus, the shapes and sizes of the electromagnets 124 and abrasive members 130 are not limited to those depicted, and the specific shapes/sizes of various components is the drawings are shown for ease of description of the overall functionality of the device 200.
[0144] The respective configurations of the replacement abrasive member 130 and the electromagnet 124 are not shown in the form of being matched at a position where the replacement abrasive member 130 and the electromagnet 124 are coupled in FIG. 25. However, the replacement abrasive member 130 arranged on the upper surface of the conveyor belt 210 of the replacement unit 220 may be in such a form that it may be moved toward the electromagnet 124 of the holder 120 and attached to the electromagnet 124 (see FIG. 24). For example, exact alignment of the replacement abrasive member 130 and the electromagnet 124 may not be required, as the coupling portion 132 may be magnetized and attached to the electromagnet 124 such that the magnetic attraction causes the replacement abrasive member 130 to be aligned with the electromagnet 124.
[0145] Additionally, the respective rotation directions of the abrasive wheel 100, the replacement assembly 220, the supply assembly 230, and the collection assembly 240 are not limited to those depicted, and various directions that allow the replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 to be moved toward and attached to the electromagnet 124 of the abrasive wheel 100 may be implemented.
[0146] FIG. 26 is a diagram illustrating an abrasive member replacement device as viewed from a side, according to one or more embodiments. FIG. 27 is a diagram illustrating the abrasive member replacement device of FIG. 26, as viewed from below, according to one or more embodiments.
[0147] Referring to FIGS. 26 and 27, the conveyor belt 210 of the replacement assembly 220 may be arranged below at least a portion of the abrasive wheel 100. The supply assembly 230 may include a supply shaft 232 and a conveyor belt 210 wound around the supply shaft 232, and the collection assembly 240 may include a collection shaft 242 and a conveyor belt 210 wound around the collection shaft 242.
[0148] As in FIGS. 24 and 25, the supply shaft 232 of the supply assembly 230 and the collection shaft 242 of the collection assembly 240 may extend in the same direction with respect to the rotary shaft 112 of the abrasive wheel 100.
[0149] However, the conveyor belts 210 of the replacement assembly 220, the supply assembly 230, and the collection assembly 240 of FIGS. 26 and 27 may not be arranged to be wound around itself on a single layer as shown in FIG. 24. As shown in FIG. 26, each conveyor belt 210 may be wound around the supply shaft 232 and the collection shaft 242, and may be arranged in multiple layers in the longitudinal direction of the shafts 232 and 242.
[0150] FIG. 28 is a diagram illustrating a configuration of an abrasive member replacement device according to one or more embodiments.
[0151] As shown in FIG. 28, the abrasive member replacement device 200 according to one or more embodiments may include the abrasive wheel 100, the replacement assembly 220, the supply assembly 230, and the collection assembly 240. In addition, a controller 250 that controls on and off states of the electromagnet 124, and a wear detector 260 that detects a degree of wear of the abrasive member 130 attached to the electromagnet 124 may be further included.
[0152] The coupling portion 132 of the abrasive member 130 may be detachably fixed to the electromagnet 124 arranged on the holder 120 of the abrasive wheel 100, and the controller 250 may control on and off states of the electromagnet 124 to control the magnetic force generated between the electromagnet 124 and the coupling portion 132, thereby controlling attachment and detachment of the electromagnet 124 and the coupling portion 132.
[0153] The controller 250 may be connected to the abrasive wheel 100. In one or more embodiments, the controller 250 may control on and off states of a plurality of electromagnets 124 at once.
[0154] According to one or more embodiments, the controller 250 may independently control the on and off states of the plurality of electromagnets 124.
[0155] For example, when the abrasive portion 136 of any of the abrasive members 130 among the plurality of abrasive members 130 attached to the plurality of electromagnets 124 is worn and needs to be replaced, only the worn abrasive member 130 that needs to be replaced may be separated from the abrasive wheel 100. That is, only the electromagnet 124 attached to the coupling portion 132 of the worn abrasive member 130 that needs to be replaced may be controlled to an off state, separating only the worn abrasive member 130 from the abrasive wheel 100 and arranging the same on the conveyor belt 210 of the replacement assembly 220.
[0156] When the electromagnet 124 provided on the abrasive wheel 100 is controlled to the off state, the coupling portion 132 of the worn abrasive member 130 attached to the electromagnet 124 may be separated from the electromagnet 124 and fall toward the conveyor belt 210 of the replacement assembly 220 below as the magnetic force with the electromagnet 124 is removed.
[0157] Accordingly, the conveyor belt 210 of the replacement assembly 220 may be arranged at a location where the worn abrasive member 130 falls. As shown in FIGS. 19A to 27, the conveyor belt 210 of the replacement assembly 220 may located below the abrasive wheel 100. However, the conveyor belt 210 may not arranged below the entire abrasive wheel 100, and may be arranged below only a portion of the abrasive wheel 100.
[0158] Accordingly, in order to allow the worn abrasive member 130 separated from the electromagnet 124 to fall onto the conveyor belt 210, a timing of separating the worn abrasive member 130 from the electromagnet 124 may be controlled and synchronized.
[0159] The worn abrasive member 130 may be separated at the time when the electromagnet 124 is located above the conveyor belt 210 of the replacement assembly 220. Accordingly, the controller 250 may control the on/off timing of the electromagnet 124, allowing the worn abrasive member 130 to fall on the conveyor belt 210 of the replacement assembly 220. The controller 250 may also be configured to control the components of the overall device 200 to perform the various operations described herein.
[0160] The wear detector 260 may detect a degree of wear of the abrasive member 130 attached to the electromagnet 124 of the abrasive wheel 100. The wear detector 260 will be described with reference to FIGS. 33 and 34 below.
[0161] FIGS. 29A to 32C are diagrams illustrating processes of replacing an abrasive member using an abrasive member replacement device, according to one or more embodiments.
[0162] Specifically, processes of separating the worn abrasive member 130 attached to the electromagnet 124 from the abrasive wheel 100, arranging the same on the conveyor belt 210 of the replacement assembly 220, and attaching a new replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 to the electromagnet 124 of the abrasive wheel 100 are shown.
[0163] FIGS. 29A-29C illustrate a process in which a worn abrasive member 130 is separated from the abrasive wheel 100 and is arranged on the conveyor belt 210 of the replacement assembly 220.
[0164] The abrasive wheel 100 may rotate about the rotary shaft 112 to grind the substrate 1 arranged below. During this process, the abrasive portion 136 of the abrasive member 130 attached to the abrasive wheel 100 may be worn (see FIGS. 19A-19C). FIG. 29A is a diagram showing a state in which the abrasive portion 136 of the abrasive member 130 attached to the electromagnet 124 of the abrasive wheel 100 is worn.
[0165] FIG. 29A shows an operation in which the abrasive wheel 100 rotates about the rotary shaft 112 with the abrasive member 130 attached to the electromagnet 124 of the holder 120. In FIG. 29A, the conveyor belt 210 of the supply assembly 230 on which no new replacement abrasive member 130 is arranged is shown as being supplied to the replacement assembly 220. However, the conveyor belt 210 of the supply assembly 230 is not necessarily required to be moving, and in the operation corresponding to FIG. 29A, the conveyor belt 210 of the supply assembly 230 may be in a stationary state in which it is not supplied to the replacement assembly 220.
[0166] In FIG. 29A, the controller 250 may maintain all the electromagnets 124 in the on state, maintaining a state in which all the abrasive members 130 are attached to the electromagnets 124 of the holder 120.
[0167] FIG. 29B, an operation is shown in which the supply assembly 230 supplies the conveyor belt 210 of the supply assembly 230 loaded with a new replacement abrasive member 130 to the replacement assembly 220.
[0168] Before attaching the new replacement abrasive member 130 arranged on the conveyor belt 210 to the electromagnet 124, a process of separating the worn abrasive member 130 of which the abrasive portion 136 attached to the electromagnet 124 of the abrasive wheel 100 is worn from the electromagnet 124 may be performed.
[0169] In FIG. 29B, an operation is also shown in which the controller 250 controls the electromagnet 124 to the off state to separate the worn abrasive member 130 from the electromagnet 124 and to arrange the same onto the upper surface of the conveyor belt 210 of the replacement assembly 220.
[0170] When the worn abrasive member 130 is positioned on the conveyor belt 210 of the replacement assembly 220 as the abrasive wheel 100 rotates, the worn abrasive member 130 may be separated, and the worn abrasive members 130 are shown as being sequentially separated.
[0171] FIG. 29C shows a state in which the operation of separating the worn abrasive member 130 from the electromagnet 124 and the operation of supplying the conveyor belt 210 of the supply assembly 230 loaded with a new replacement abrasive member 130 to the replacement assembly 220 by the supply assembly 230 have been further progressed.
[0172] FIG. 29C shows the number of worn abrasive members 130 separated from the abrasive wheel 100 and arranged on the conveyor belt 210 of the replacement assembly 220 is larger. In addition, FIG. 29C shows that the conveyor belt 210 of the supply assembly 230 on which the new replacement abrasive member 130 is arranged has moved further toward the replacement assembly 220. The conveyor belt 210 of the replacement assembly 220 on which the worn abrasive member 130 is arranged may be moved toward the collection assembly 240.
[0173] FIGS. 30A-30C are diagrams showing the respective drawings of FIGS. 29A-29C, as viewed from below.
[0174] FIG. 30A shows an aspect in which the abrasive wheel rotates about the rotary shaft 112 with the abrasive member 130 attached to the electromagnet 124 of the holder 120, as in FIG. 29A. FIGS. 30B and 30C show a process in which the controller 250 controls the electromagnet 124 to the off state to separate the worn abrasive member 130 from the electromagnet 124 and to arrange the same on the conveyor belt 210 of the replacement assembly 220. The supply assembly 230 may supply the conveyor belt 210 of the supply assembly 230 loaded with the new replacement abrasive member 130 to the replacement assembly 220.
[0175] FIGS. 31A-31C show a state in which the worn abrasive members 130 attached to the abrasive wheel 100 are all separated from the electromagnets 124, and a process in which the new replacement abrasive members 130 arranged on the conveyor belt 210 of the replacement assembly 220 are attached to the electromagnets 124. FIGS. 32A-32C are diagrams respectively corresponding to FIGS. 31A-31C, as viewed from below.
[0176] FIG. 31A shows a process in which the new replacement abrasive members 130 are supplied to the abrasive wheel 100 from which the worn abrasive members 130 have been all removed according to the processes shown in FIGS. 29C and 30C and the replacement abrasive members 130 are attached to the electromagnets 124.
[0177] As shown in FIGS. 31A and 32A, the abrasive wheel 100 may be rotating, and the conveyor belt 210 of the replacement assembly 220 arranged below the abrasive wheel 100 also may move along the direction shown.
[0178] Accordingly, as shown in FIGS. 31B and 32B, the new replacement abrasive members 130 may be attached to the electromagnets 124 from which the worn abrasive members 130 have been removed.
[0179] The process of attaching the new replacement abrasive member 130 to the electromagnet 124 may include an operation in which the controller 250 controls the electromagnet 124 to the on state to attach the new replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 to the electromagnet 124.
[0180] An operation in which the collection assembly 240 collects the conveyor belt 210 of the replacement assembly 220 may be performed. The new replacement abrasive member 130 may no longer be arranged on the conveyor belt 210 collected by the collection assembly 240.
[0181] In one or more embodiments, a worn abrasive member 130 separated from the electromagnet 124 may be arranged on the conveyor belt 210 collected by the collection assembly 240 (see FIGS. 34D and 35D).
[0182] As shown in FIGS. 31C and 32C, when the new replacement abrasive members 130 are attached to all the electromagnets 124, the supply assembly 230 that supplies the conveyor belt 210 on which new replacement abrasive members 130 are arranged may no longer move the conveyor belt 210 in the direction of the replacement assembly 220.
[0183] That is, the moving direction of the supply assembly 230 may be changed in an opposite direction, so that the new replacement abrasive members 130 do not move toward the replacement assembly 220 where the abrasive wheel 100 is located, but return to the supply assembly 230 again. In this case, the new replacement abrasive members 130 may be gathered again in the supply assembly 230.
[0184] In one or more embodiments, even when the new replacement abrasive members 130 are attached to all the electromagnets 124, the supply assembly 230 may continue to move the conveyor belt 210 on which the new replacement abrasive members 130 are arranged in the direction of the replacement assembly 220 (see FIGS. 34D and 35D).
[0185] This may be performed in a case where the abrasive wheel 110 and the conveyor belt 210 of the replacement assembly 220 are arranged such that there is no collision between the new replacement abrasive members 130 arranged on the conveyor belt 210 of the replacement assembly 220 and the abrasive members 130 attached to the electromagnets 124.
[0186] An additional operation may be performed. For example, when the conveyor belt 210 moves toward the collection assembly 240 and the new replacement abrasive members 130 arranged on the conveyor belt 210 move to the collection assembly 240, a new replacement abrasive member 130 may be selected in the collection assembly 240.
[0187] FIG. 33 is a diagram illustrating an abrasive member replacement device according to one or more embodiments.
[0188] FIG. 33 is a diagram of the abrasive member replacement device 200 as viewed from a side.
[0189] A substrate 1 may be arranged below at least a portion of the abrasive wheel 100, and the conveyor belt 210 of the replacement assembly 220, which may be a component of the abrasive member replacement device 200, may be arranged below the abrasive wheel 100 at a position other than a position where the substrate 1 is arranged.
[0190] In one or more embodiments, a wear detector 260 may be arranged below the holder 120.
[0191] The wear detector 260 may detect a degree of wear of the abrasive portion 136 of the abrasive member 130 attached to the electromagnet 124. The wear detector 260 may be arranged below the holder 120 between the conveyor belt 210 of the replacement assembly 220 and the substrate 1.
[0192] The wear detector 260 may detect a degree to which the abrasive member 130 is worn by detecting a position of the abrasive member 130 located above.
[0193] For example, the wear detector 260 may include a light emitter and a light receiver. A distance from the wear detector 260 to the lower surface of the abrasive portion 136 may be measured by the light emitter and the light receiver emitting and receiving light, and using a time difference measured until the light reaches a target position. By comparing the measured distance with a preset distance, the degree of wear may be determined. However, the method by which the wear detector 260 measures the distance to the lower surface of the abrasive portion 136 is not limited to the method described above.
[0194] FIGS. 34A to 35D are diagrams illustrating processes of replacing an abrasive member using the abrasive member replacement device according to one or more embodiments.
[0195] FIGS. 34A-34D are diagrams showing FIG. 33 as viewed from direction S1 shown in FIG. 20, and FIGS. 35A-35D are diagrams respectively corresponding to FIGS. 34A-34D as viewed from below.
[0196] In FIGS. 34A-34D, the wear detector 260 is shown to overlap the conveyor belt 210 of the replacement assembly 220. However, the wear detector may be arranged behind the conveyor belt 210 of the replacement assembly 220. Thus, as depicted, the wear detector 260 is partially concealed by the conveyor belt 210 of the replacement assembly 220. However, for ease of description, the wear detector 260 is shown not to be concealed.
[0197] FIGS. 34A-35D are similar to the process of replacing the abrasive member 130 shown in FIGS. 29A to 32C, but show a case in which the wear detector 260 is further included, and an operation in which the wear detector 260 detects a degree of wear of the abrasive member 130 attached to the electromagnet 124 may be further included.
[0198] In addition, the operation in which the controller 250 controls the electromagnet 124 to the off state to separate the worn abrasive member 130 from the electromagnet 124 may further include an operation in which the controller 250 controls the on and off states of the electromagnets 124 provided on the holder 120, depending on the degree of wear of the abrasive member 130 detected by the wear detector 260.
[0199] In addition, when the worn abrasive member 130 is located above the conveyor belt 210 of the replacement assembly 220, the worn abrasive member 130 may be separated from the electromagnet 124. Accordingly, an additional operation may be performed. The additional operation may include, when the worn abrasive member 130 is arranged at the above position, controlling the corresponding electromagnet 124 to the off state to arrange the worn abrasive member 130 onto the upper surface of the conveyor belt 210 of the replacement assembly 220.
[0200] Specifically, FIGS. 34A and 35A show an aspect in which the abrasive wheel 100 grinds the substrate 1 arranged below while rotating (see the position of the substrate 1 in FIGS. 19A-19C). During this process, the wear detector 260 arranged between the substrate 1 and the conveyor belt 210 of the replacement assembly 220 may detect a degree to which the abrasive member 130 attached to the abrasive wheel 100 is worn, as shown in FIG. 34A.
[0201] FIGS. 34B and 35B show a state in which one of the abrasive members 130 attached to the abrasive wheel 100 is greatly worn as a result of the substrate grinding operation of FIG. 34A. During the rotation of the abrasive wheel 100, the plurality of abrasive members 130 may pass over the wear detector 260 arranged between the substrate 1 and the conveyor belt 210 at least once. During this process, the wear detector 260 may detect a worn abrasive member 130.
[0202] In FIG. 34B, after the wear detector 260 detects the worn abrasive member 130, the abrasive wheel 100 may continue to rotate, and the worn abrasive member 130 may be located above the conveyor belt 210 of the replacement assembly 220 again as a result of the rotation.
[0203] FIGS. 34C and 35C show an aspect in which the worn abrasive member 130, which is detected as being worn by the wear detector 260, may be located again above the conveyor belt 210 of the replacement assembly 220 as the abrasive wheel 100 rotates. The worn abrasive member 130 may be separated from the electromagnet 124 and arranged on the upper surface of the conveyor belt 210 of the replacement assembly 220.
[0204] During this process, the controller 250 may identify only the electromagnet 124 to which the worn abrasive member 130 is attached and control the same to the off state.
[0205] As shown in FIG. 34C, after the worn abrasive member 130 is arranged on the upper surface of the conveyor belt 210 of the replacement assembly 220, the conveyor belt 210 of the supply assembly 230 on which new replacement abrasive members 130 are arranged may move toward the replacement assembly 220.
[0206] As the supply assembly 230 moves the conveyor belt 210 on which the new replacement abrasive members 130 are arranged toward the replacement assembly 220, the worn abrasive member 130 worn and dropped on the conveyor belt 210 of the replacement assembly 220 may be moved to the collection assembly 240, as shown in FIGS. 34D and 35D.
[0207] A new replacement abrasive member 130 may be arranged below the electromagnet 124 from which the worn abrasive member 130 has been removed. The controller 250 may control the electromagnet 124 to the on state again to pull up and attach the new replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 to the electromagnet 124.
[0208] The wear detector 260 may be arranged at a position below the abrasive wheel 100 where the abrasive member 130 attached to the electromagnet 124 passes.
[0209] FIG. 35C is a diagram showing an aspect in which the worn abrasive member 130 is being separated from the electromagnet 124. FIG. 35D shows a new replacement abrasive member 130 arranged on the conveyor belt 210 of the replacement assembly 220 being attached to the electromagnet 124 from which the worn abrasive member 130 has been separated.
[0210] FIG. 36 is a diagram illustrating an abrasive member replacement device according to one or more embodiments.
[0211] Referring to FIG. 36, a support portion 212 for supporting the abrasive member 130 may be arranged on the upper surface of the conveyor belt 210 of the abrasive member replacement device 200.
[0212] The conveyor belt 210 of the supply assembly 230, the replacement assembly 220, and the collection assembly 240 may move from the supply assembly 230 toward the collection assembly 240 via the replacement assembly 220, and the support portion 212 arranged on the conveyor belt 210 of the supply assembly 230 may stably support a new replacement abrasive member 130.
[0213] The support portion 212 arranged in the collection assembly 240 may stably support the worn and separated worn abrasive member 130 on the conveyor belt 210.
[0214] The conveyor belt 210 arranged in the replacement assembly 220 may also support the worn abrasive member 130 separated from the electromagnet 124 of the abrasive wheel 100 and support a replacement abrasive member 130 immediately before attached to the electromagnet 124.
[0215] According to one or more embodiments, by detecting an abrasive member that needs to be replaced and automatically replacing the abrasive member, replacement efficiency may be increased and the operating time of the grinder may be maximized.
[0216] FIG. 37 is a flowchart illustrating a method of replacing an abrasive member according to one or more embodiments.
[0217] The method may include operation S100 in which an abrasive wheel rotates about a rotary shaft, operation S200 in which a controller separates a worn abrasive member from an electromagnet by setting the electromagnet to an off state, operation S300 in which a conveyor belt of supply assembly supplies a replacement abrasive member to a replacement assembly, operation S400 in which the controller attaches the replacement abrasive member that is on the conveyor belt to the electromagnet by setting the electromagnet to an on state, and operation S500 in which a collection assembly collects the worn abrasive member from the conveyor belt of the replacement assembly.
[0218] Each of the embodiments provided in the above description is not excluded from being associated with one or more features of another example or another embodiment also provided herein or not provided herein but consistent with the disclosure.
[0219] While the disclosure has been particularly shown and described with reference to embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the following claims.
