Abstract
A holding device, in particular a grinding disc, for a grinding member includes at least one support member that has at least one material opening configured for transverse transport of grinding dust to one side facing the grinding member in a plane parallel to a grinding surface. The holding device further includes at least one securing layer configured to secure the grinding member on the at least one support member. When decoupled from the grinding member, the at least one material opening is at least substantially open on a side facing the grinding member and on a side facing away from the grinding member is substantially delimited by the support member.
Claims
1. A holding device for a grinding member, comprising: at least one support body having at least one material recess configured for transverse transport of grinding dust on a side facing the grinding member in a plane parallel to a grinding face; and at least one securing layer configured to secure the grinding member on the at least one support body, wherein, when decoupled from the grinding member, the at least one material recess is at least substantially open on a side facing the grinding member and is substantially delimited by the support body on a side facing away from the grinding member, and wherein the at least one material recess is configured as an inner region of a peripheral annular channel.
2. The holding device as claimed in claim 1, wherein the at least one material recess is configured as an inner region of a channel element.
3. The holding device as claimed in claim 2, wherein the channel element is at least partially curved.
4. The holding device as claimed in claim 3, wherein the at least partially curved channel element is configured as a Fibonacci spiral element.
5. The holding device as claimed in claim 3, wherein the support body has a spiral structure formed from at least partially curved channel elements.
6. A holding device for a grinding member, comprising: at least one support body having at least one material recess configured for transverse transport of grinding dust on a side facing the grinding member in a plane parallel to a grinding face; and at least one securing layer configured to secure the grinding member on the at least one support body, wherein, when decoupled from the grinding member, the at least one material recess is at least substantially open on a side facing the grinding member and is substantially delimited by the support body on a side facing away from the grinding member, wherein the at least one material recess is configured as an inner region of a channel element, wherein the channel element is at least partially curved, and wherein the at least partially curved channel element is configured as a Fibonacci spiral element.
7. The holding device as claimed in claim 6, further comprising island-like support protrusions, the at least one material recess arranged between the support protrusions.
8. The holding device as claimed in claim 7, further comprising web elements that interconnect the support protrusions and straddle the at least one material recess.
9. The holding device as claimed in claim 8, wherein the web elements are configured integrally with the securing layer.
10. A holding device for a grinding member, comprising: at least one support body having at least one material recess configured for transverse transport of grinding dust on a side facing the grinding member in a plane parallel to a grinding face; at least one securing layer configured to secure the grinding member on the at least one support body; and at least one peripheral support ring that is free from material recesses, wherein, when decoupled from the grinding member, the at least one material recess is at least substantially open on a side facing the grinding member and is substantially delimited by the support body on a side facing away from the grinding member.
11. The holding device as claimed in claim 6, wherein the support body has at least one connection hole configured to connect to a suction device that is connected to the at least one material recess.
12. The holding device as claimed in claim 11, wherein the at least one connection hole is formed by a center hole of the support body.
13. The holding device as claimed in claim 6, further comprising at least one feed air opening configured to feed air to assist the transverse transport of grinding dust.
14. The holding device as claimed in claim 13, wherein the at least one feed air opening is formed by a center hole of the support body.
15. A grinding apparatus, comprising: a holding device for a grinding member, the holding device including: at least one support body having at least one material recess configured for transverse transport of grinding dust on a side facing the grinding member in a plane parallel to a grinding face, and at least one securing layer configured to secure the grinding member on the at least one support body, wherein, when decoupled from the grinding member, the at least one material recess is at least substantially open on a side facing the grinding member and is substantially delimited by the support body on a side facing away from the grinding member, wherein the at least one material recess is configured as an inner region of a channel element, wherein the channel element is at least partially curved, and wherein the at least partially curved channel element is configured as a Fibonacci spiral element.
16. The holding device as claimed in claim 6, wherein the grinding member is secured to the support body via the securing layer.
17. The holding device as claimed in claim 6, wherein the holding device is configured as a grinding disk.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Further advantages will emerge from the following description of a drawing. Nine exemplary embodiments of the disclosure are presented in the drawings. The drawings, the description and the claims contain numerous features in combination. Where appropriate, a person skilled in the art will also consider the features individually and combine them to form expedient further combinations.
(2) In the drawings:
(3) FIG. 1 shows a holding device according to the disclosure with a plurality of material recesses and island-like support protrusions, in a view from above,
(4) FIG. 2 shows a cross section through the holding device according to the disclosure according to FIG. 1 and a grinding means,
(5) FIG. 3 shows an alternative holding device according to the disclosure having a plurality of material recesses, island-like support protrusions and web elements, which interconnect the island-like support protrusions, in a view from above,
(6) FIG. 4 shows a cross section through the holding device according to the disclosure according to FIG. 3 and a grinding means,
(7) FIG. 5 shows a further alternative holding device, which has a spiral structure of material recesses formed as Fibonacci spiral elements, in a plan view,
(8) FIG. 6 shows a grinding means with hole pattern, in a view from above,
(9) FIG. 7 shows a schematic illustration of an overlap of the hole pattern of the grinding means from FIG. 6 with the spiral structure of the material recesses from FIG. 5,
(10) FIG. 8 shows a third alternative holding device with a spiral structure of material recesses formed as Fibonacci spiral elements, in a plan view, together with an overlap of a hole pattern of other grinding means with the spiral structure,
(11) FIG. 9 shows a fourth alternative holding device having a spiral structure formed from V-shaped channel elements,
(12) FIG. 10 shows a fifth alternative holding device having a spiral structure formed from U-shaped channel elements,
(13) FIG. 11 shows a sixth alternative holding device having material recesses formed as eccentrically arranged channel elements running in straight lines,
(14) FIG. 12 shows a seventh alternative holding device having material recesses formed as centrally arranged channel elements running in straight lines, and
(15) FIG. 13 shows an alternative holding device having material recesses formed as centrally arranged channel elements running in straight lines and connected to a center hole as connection hole to form a suction device.
DETAILED DESCRIPTION
(16) FIG. 1 shows a holding device 10a, formed as a grinding disk, for a grinding means 30a (see FIG. 2), having a support body 12a, which comprises material recesses 20a, which are provided for transverse transport of grinding dust on a side facing the grinding means 30a in a plane parallel to a grinding face 24a, and having a securing layer 14a for securing the grinding means 30a on the support body 12a. The material recesses 20a, when decoupled from the grinding means 30a, are substantially open on a side facing the grinding means 30a and are substantially delimited by the support body 12a on a side facing away from the grinding means 30a. The material recesses 20a are completely uncovered by the securing layer 14a, wherein, when decoupled from the grinding means 30a, the securing layer 14a is arranged on the support body 12a, but the grinding means 30a is not yet secured to the securing layer 14a. The holding device 10a has island-like support protrusions 16a, between which the material recesses 20a are arranged. The island-like support protrusions 16a are enclosed on all sides by the material recesses 20a and/or a center hole 42a of the support body 12a or an outer side of the holding device. The securing layer 14a is arranged on an upper face of the island-like support protrusions 16a, said upper side being arranged on the grinding means side (FIG. 2). The securing layer 14a is formed as a hook-and-loop layer, which secures a grinding means backing 36a of the grinding means 30a, which backing is formed as a velour layer. The material recesses 20a are formed partially as inner regions of straight longitudinal channels, which extend radially toward the center hole 42a, and partially as inner regions of curved channel elements 22a, which extend at a fixed radius around the center hole 42a. The material recesses 20a formed as inner regions of curved channel elements 22a are thus formed as an inner region of peripheral annular channels 44a. Approximately twenty percent of an area of the support body 12a on the grinding means side is occupied by the material recesses 20a. The support body 12a has connection holes 40a for connection to a suction device, said connection holes being connected to the at least one material recess 20a. In the illustrated exemplary embodiment four connection holes 40a are distributed over the support body 12a, wherein, in principle, different numbers of connection holes 40a may be formed in the support body 12a. The holding device 10a is provided to connect the grinding means 30a to an electric grinding apparatus formed as a handheld grinding apparatus. In principle, the grinding apparatus may also be secured to a robot, and/or integrated therein, for an automated machining of a workpiece. Due to a forming of a number of material recesses 20a as inner regions of annular channels 44a, in the event of the blockage of a material recess 20a formed as a longitudinal channel, said blockage being caused for example by grinding dust of resin-containing materials or by foreign bodies such as adhesives, grinding dust can be conveyed to the connection hole 40a via the annular channel 44a and a further material recess 20a formed as an inner region of a longitudinal channel.
(17) For a machining of a workpiece, a grinding means 30a is secured to the holding device 10a (FIG. 2). The system formed from holding device 10a and grinding means 30a is then secured to the grinding apparatus. The grinding means 30a comprises the grinding means backing 36a, formed as a velour layer, and a grinding particle layer 34a applied thereto and formed from grinding particles. The grinding particles are preferably produced from a ceramic material and preferably have a defined shape predetermined by a production process. The grinding particles in the grinding particle layer 34a are fixed to a surface of the grinding means backing 36a by means of the first adhesive layer formed from a base binder and are fixedly connected to the grinding means backing by means of a second adhesive layer formed from a top binder. The grinding means 30a has grinding means holes 32a for discharging grinding dust produced during a grinding operation, said grinding means holes being arranged in a hole pattern. Following a coupling of the grinding means 30a to the holding device 10a, grinding dust enters the material recesses 20a through the grinding means holes 32a during the grinding operation and is conveyed via these recesses to the connection hole 40a and is removed by the suction device. Due to the material recesses 20a, in particular due to a wide-area coverage of the surface of the support body 12a on the grinding means side by the material recesses 20a, it is possible to dispense with a specific alignment of the grinding means 30a on the holding device 10a in order to line up grinding means holes 32a with connection holes 40a of the support body 12a, whereby a time-consuming step can be saved when mounting the grinding means 30a on the holding device 10a. In particular, an exchange of the grinding means 30a on the holding device 10a can thus be performed quickly. The support body 12a of the holding device 10 is formed integrally with a foam body 26a of the holding device 10a, which foam body consists of a foam material and provides a deformable support body for the grinding means 30a, which allows an adaptation of the grinding face 24a to contours of the workpiece. In alternative embodiments of the holding device 10a according to the disclosure, it is conceivable for the support body 12a to be formed as a separate component compared to the foam body 26a, for example as a support disk, which is fitted onto the foam body 26a. The holding device 10a comprises a base plate 46a formed from fiberglass, which achieves a termination of the foam body 26a on the grinding apparatus side and provides a firm surface for the foam body 26a. The holding device 10a also comprises a cladding layer 28a, which is arranged at lateral edges of the foam body 26a and consists of a foam material having a greater strength than a material of the foam body 26a. The cladding layer 28a protects the foam body 26a against damage. In principle, the holding device 10a may be formed without the cladding layer 28a and/or base plate 46a and may comprise merely a foam body 26a, a support body 12a and a securing layer 14a. The holding device 10a is secured to the grinding apparatus by way of any means appearing expedient to a person skilled in the art, for example using screw connections, which connect the base plate 46a and the grinding apparatus. In a method for producing the holding device 10a, a securing layer 14a is inserted into an accordingly formed foam tool, and the support body 12a is fabricated by being foamed on against the securing layer 14a. Alternatively, the support body 12a can be produced first, wherein the material recesses 20a are created during the production of the support body 12a or in a separate production step, and the securing layer 14a is then applied to the island-like support protrusions 16a.
(18) Eight further exemplary embodiments of the disclosure are shown in FIGS. 3 to 13. The following descriptions and the drawings are limited fundamentally to the differences between the exemplary embodiments, wherein, with respect to identically named components, in particular with respect to components having identical reference signs, reference is also made in principle to the drawings and/or the description of the other exemplary embodiments, in particular FIGS. 1 to 2. In order to distinguish the exemplary embodiments, the letter a follows the reference signs of the exemplary embodiment in FIGS. 1 to 2. In the exemplary embodiments of FIGS. 3 to 13, the letter a is replaced by the letters b to i.
(19) An alternative holding device 10b is shown in FIGS. 3 and 4. The holding device 10b comprises a support body 12b comprising material recesses 20b, which are provided for transverse transport on a side facing the grinding means 30b in a plane parallel to a grinding face 24b, and a securing layer 14b, which is formed as a hook-and-loop layer, for securing a grinding means 30b on the support body 12b. When decoupled from the grinding means 30b, the material recesses 20b are substantially open on a side facing the grinding means 30b and are substantially delimited by the support body 12b on a side facing away from the grinding means 30b and extend between island-like support protrusions 16b. The holding device 10b has web elements 18b, which interconnect the support protrusions 16b and straddle the material recesses 20b. The web elements 18b are formed integrally with the securing layer 14b. Alternatively, the web elements 18b can be fabricated separately from foam or plastic. In the state decoupled from the grinding means 30b the material recesses 20b are furthermore present uncovered to an extent of sixty percent, straddled by the web elements 18b. Material recesses 20b straddled by web elements 18b are marked in the drawing by dashed contours. The support body of the holding device 10b also has a peripheral support ring 38b, which is free from material recesses 20b and is likewise covered by the securing layer 14b. A structure of the holding device 10b and a function of components of the holding device 10b are otherwise completely similar to the previous exemplary embodiment. The web elements 18b provide additional securing area compared with the design of the previous exemplary embodiment, whereby a securing of the grinding means 30b to the holding device 10b achieves a high strength. Due to the web elements 18b, the securing layer 14b is also formed as a cohesive overall element. Due to the formation of the securing layer 14b as a cohesive overall element, a method for producing the holding device 10b, in which the support body 12b is fabricated by being foamed on against the securing layer 14b, can be performed by means of technically simple process steps and using a foaming tool fabricated in a structurally simple manner.
(20) A further alternative design of a holding device 10c for a grinding means 30c is illustrated in FIG. 5. The holding device 10c has a support body 12c comprising material recesses 20c, which are provided for a grinding dust on a side facing the grinding means 30c in a plane parallel to a grinding face 24c, and also has a securing layer 14c for securing the grinding means 30c on the support body 12c. When decoupled from the grinding means 30c, the material recesses 20c are substantially open on a side facing the grinding means 30c and are substantially delimited by the support body 12c on a side facing away from the grinding means 30c and are completely uncovered by the securing layer 14c, wherein, when decoupled from the grinding means 30c, the securing layer 14c is arranged on the support body 12c, but the grinding means 30c is not yet attached to the securing layer 14c. The material recesses 20c are formed as inner regions of channel elements 22c. The channel elements 22c are curved and formed as spiral elements, which form spiral arms of a spiral structure. The support body 12c has a total of nine curved channel elements, such that the support body 12c has a nine-armed spiral structure formed from curved channel elements 22c. The material recesses 20c formed as inner regions of curved channel elements 22c are not connected to one another. The curved channel elements 22c are formed as Fibonacci spiral elements, wherein the Fibonacci spiral elements have a course with a design rule by a connection of corner points of adjacent squares arranged in succession in an anticlockwise direction, wherein side lengths of the squares arranged in succession in an anticlockwise direction are arranged in a ratio to one another that is predefined by a Fibonacci sequence, and an orientation of the corner points of successive squares, through which the spiral element extends, likewise alternates in an anticlockwise direction. Due to a course of the Fibonacci spiral elements and a wide-area coverage of a face of the support body 12c on the grinding means side, a high likelihood of an overlap of one or more grinding means holes 32c of a wide range of different hole patterns of grinding means 30c and the material recesses 20c formed as Fibonacci spiral elements is achieved, without having to purposefully align the grinding means 30c and holding device 10c in an aligning step. The support body 12c has connection holes 40c for connection to a suction device, each of said holes being connected to a material recess 20c. The connection holes 40c each have a circular diameter, which is greater than a width of the curved channel elements 22c. A center hole 42c of the support body 12c is free, in this design, from a connection to a suction device. Approximately twenty percent of an area of the support body 12c on the grinding means side is occupied by the material recesses 20c. The support body 12c also has a peripheral support ring 38c, which is free from material recesses 20c. In principle, the peripheral support ring 38c could be formed in alternative embodiments as a separate component additionally to the support body 12c. In a further alternative design the material recesses 20c may be interconnected in principle via a peripheral connection channel in ring form, such that, even when a material recess 20c and/or a connection hole 40c is/are blocked, grinding dust can be transported to a further connection hole 40c via the connection channel.
(21) In FIG. 6 a grinding means 30c having a grinding layer 34c, which is applied to a grinding means backing 36c made of velour (not illustrated), and having a hole pattern formed from seventeen grinding means holes 32c is illustrated. FIG. 7 shows the holding device 10c from FIG. 5 with a schematically illustrated overlap of the material recesses 20c and the grinding means holes 32c of the grinding means 30c from FIG. 6. Due to the spiral structure of the material recesses 20c of the support body 12c and a wide-area coverage of a face of the support body 12c on the grinding means side, there is a high likelihood of an at least partial overlap of at least one grinding means hole 32c for discharging grinding dust and at least one material recess 20c, without having to purposefully align the grinding means 30c in order to line up the grinding means holes 32c and connection holes 40c when mounting the grinding means 30c on the holding device 10c. Further, other hole patterns of grinding means holes 32c are also lined up at least partially with the material recesses 20c with a high likelihood, without purposeful alignment of the grinding means 30c, such that grinding dust is suctioned without any purposeful alignment when mounting the grinding means 30c on the holding device 10c. The holding device 10c can thus be used for grinding means 30c having different hole patterns.
(22) In FIG. 8 a further alternative embodiment of a holding device 10d for a grinding means 30d is illustrated and is formed similarly to the previous embodiment. The holding device 10d comprises a support body 12d, the material recesses 20d, which are provided for transverse transport of grinding dust on a side facing the grinding means 30d in a plane parallel to a grinding face 24d, and a securing layer 14d for securing the grinding means 30d on the support body 12d. When decoupled from the grinding means 30d, the material recesses 20d are substantially open on a side facing the grinding means 30d, are substantially delimited by the support body 12d on a side facing away from the grinding means 30d, and are completely uncovered by the securing layer 14d, wherein, when decoupled from the grinding means 30d, the securing layer 14d is arranged on the support body 12d, but the grinding means 30d is not yet attached to the securing layer 14d. The material recesses 20d are also formed as inner regions of curved channel elements 22d formed as Fibonacci spiral elements. The support body 12d, instead of nine, has a total of sixteen material recesses 20d, which are arranged in a spiral structure. Approximately thirty percent of the area of the support body 12d on the grinding means side is occupied by material recesses 20d. As in the previous example, the support body 12d has connection holes 40d for a connection to a suction device, wherein each connection hole 40d is connected to a material recess 20d and the material recesses 20d formed as inner regions of curved channel elements 22d are not connected to one another. The support body 12d also has a peripheral support ring 38d, which is free from material recesses 20c and forms a peripheral outer edge of the support body 12d.
(23) FIG. 9 shows a further alternative embodiment of a holding device 10e for grinding means 30e. The holding device 10e comprises a support body 12e, the material recesses 20e, which are provided for transverse transport of grinding dust on a side facing the grinding means 30e in a plane parallel to a grinding face 24e, and a securing layer 14e for securing the grinding means 30e on the support body 12e. When decoupled from the grinding means 30e, the material recesses 20e are substantially open on a side facing the grinding means 30e, are substantially delimited by the support body 12e on a side facing away from the grinding means 30e, and are completely uncovered by the securing layer 14e, wherein, when decoupled from the grinding means 30e, the securing layer 14e is arranged on the support body 12e, but the grinding means 30e is not yet attached to the securing layer 14e. The material recesses 20e are formed as inner regions of curved channel elements 22e. The channel elements 22e have a V shape, wherein a connection hole 40e for connection to a suction device is arranged at a tip of each V shape. The support body 12e of the holding device 10e has a total of eight material recesses 20e, which are oriented around a center hole 42e. The center hole 42e is formed as a feed air opening, which is provided for a feed of air to assist the transverse transport of grinding dust.
(24) FIG. 10 shows a further alternative embodiment of a holding device 10f for a grinding means 30f, which is formed substantially similarly to the preceding embodiment. The embodiment differs from the previous embodiment in terms of a form of the material recesses 20f, which are provided for transverse transport of grinding dust on a side facing the grinding means 30f in a plane parallel to a grinding face 24f and, when decoupled from the grinding means 30f, are substantially open on a side facing the grinding means 30f, are substantially delimited by the support body 12f on a side facing away from the grinding means 30f, and are completely uncovered by a securing layer 14e. The material recesses 20f are formed as inner regions of curved channel elements 22f, which have a U shape. A connection hole 40f for connection to a suction device is arranged in a middle region of each U shape of the channel elements 22f. A total of eight material recesses 20f are arranged on the support body and are oriented symmetrically with respect to a center hole 42f. The center hole 42f is formed as a feed air opening, which is provided for a feed of air to assist the transverse transport of grinding dust.
(25) A further alternative embodiment of a holding device 10g for a grinding means 30g has eight material recesses 20g, which are provided for transverse transport of grinding dust on a side facing the grinding means 30g in a plane parallel to a grinding face 24g and which are formed as inner regions of straight channel elements 22g (FIG. 11). Another design of a support body 12g, a securing layer 14g, and the material recesses 20g corresponds to those of the previous exemplary embodiments. The material recesses 20g are arranged symmetrically with respect to a center hole 42g of the support body 12g, wherein an orientation between a course of the channel element 22g and the center hole 42g for each channel element 22g is different. The material recesses 20g thus have an eccentric arrangement on the support body 12g. A connection hole 40g for connection to a suction device is arranged in a middle of each material recess 20g. The center hole 42g is formed as a feed air opening, which is provided for a feed of air to assist the transverse transport of grinding dust.
(26) A further alternative embodiment of a holding device 10h for a grinding means 30h having eight material recesses 20h, which are formed as inner regions of straight channel elements 22h, is presented in FIG. 12. The holding device 10h is formed similarly to the previous exemplary embodiment, apart from an orientation of the channel elements 22h. The channel elements 22h are oriented identically and point with a direction of a longitudinal extension toward a center hole 42h of a support body 12h. The material recesses 20h thus have an eccentric arrangement on the support body 12h. A connection hole 40h for connection to a suction device is arranged in a middle of each material recess 20h. The center hole 42h is formed as a feed air opening, which is provided for a feed of air to assist the transverse transport of grinding dust on a side facing the grinding means 30h.
(27) A further exemplary embodiment of the disclosure, which is fundamentally similar to the preceding exemplary embodiment, is illustrated in FIG. 13. In contrast to the preceding exemplary embodiment, material recesses 20i of a support body 12i of a holding device 10i, which recesses are formed as inner regions of straight channel elements 22i, are connected to a center hole 42i of the support body 12i. The center hole 42i of the support body 12i is formed as a connection hole 40h for connection to a suction device. The rest of the design of the holding device 10i is completely similar to that of the previous exemplary embodiment.
