Grinding and/or Polishing Pad Device, Grinding and/or Polishing Machine and Method for Manufacturing a Grinding and/or Polishing Pad Device

Abstract

A grinding and/or polishing pad device for a grinding and/or polishing pad for a grinding and/or polishing machine has a drive interface unit for connecting a carrier unit of the grinding and/or polishing pad to the grinding and/or polishing machine. The drive interface unit has an offset shape and/or the drive interface unit is designed like a sprocket.

Claims

1. A grinding and/or polishing pad device for a grinding and/or polishing pad for a grinding and/or polishing machine, comprising a drive interface unit configured to connect a carrier unit of the grinding and/or polishing pad to the grinding and/or polishing machine, wherein the drive interface unit has an offset shape and/or the drive interface unit is designed like a sprocket.

2. The grinding and/or polishing pad device according to claim 1, wherein the carrier unit is connected flush to a contact surface of the drive interface unit for connection to the grinding and/or polishing machine on the machine side.

3. The grinding and/or polishing pad device according to claim 1, wherein the drive interface unit has at least one air passage opening for dust extraction.

4. The grinding and/or polishing pad device according to claim 1, wherein the carrier unit has at least one air passage opening arranged between two adjacent teeth of the sprocket-like drive interface unit.

5. The grinding and/or polishing pad device according to claim 1, wherein the sprocket-like drive interface unit has a plurality of teeth which have at least partially different tooth heights from one another.

6. The grinding and/or polishing pad device according to claim 1, wherein a ratio of a maximum diameter of the drive interface unit to a maximum diameter of the carrier unit is at least 0.35.

7. The grinding and/or polishing pad device according to claim 1, wherein a ratio of a total height of the grinding and/or polishing pad device, which extends perpendicular to a main extension plane of the grinding and/or polishing pad device, to a maximum diameter of the grinding and/or polishing pad device, which extends parallel to the main extension plane of the grinding and/or polishing pad device, is at most 0.15.

8. A grinding and/or polishing machine having the grinding and/or polishing pad device according to claim 1.

9. A method for manufacturing a grinding and/or polishing pad device according to claim 1, comprising at least partially integrating the drive interface unit with the offset shape and/or designed like the sprocket into the carrier unit.

10. The method according to claim 9, further comprising grinding down the drive interface unit on the machine side so as to be flush with the adjacent carrier unit.

11. The method according to claim 9, further comprising foaming a padding unit onto the carrier unit on the machining side so that a rib structural element of the carrier unit forms a side wall of an air channel of the carrier unit.

12. The grinding and/or polishing pad device according to claim 1, wherein the carrier unit is connected flush to an offset machine-side outer surface of the drive interface unit for connection to the grinding and/or polishing machine on the machine side.

13. A method for manufacturing a grinding and/or polishing pad device according to claim 1, comprising at least partially molding the carrier unit over the drive interface unit with the offset shape and/or designed like the sprocket.

14. The method according to claim 13, further comprising grinding down the drive interface unit on the machine side so as to be flush with the adjacent carrier unit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Further advantages follow from the description of the drawings below. Three exemplary embodiments are shown in the drawing. The drawing, the description, and the claims contain numerous features in combination. A person skilled in the art will appropriately also consider the features individually and combine them into additional advantageous combinations.

[0033] The figures show:

[0034] FIG. 1a side view of a grinding and/or polishing machine with a grinding and/or polishing pad,

[0035] FIG. 2a perspective view of the grinding and/or polishing pad shown in FIG. 1,

[0036] FIG. 3an exploded view of the grinding and/or polishing pad shown in FIG. 1,

[0037] FIG. 4the grinding and/or polishing pad from FIG. 1 in a lateral cross-sectional view,

[0038] FIG. 5a carrier unit of the grinding and/or polishing pad in a perspective view of an upper side of the carrier unit,

[0039] FIG. 6the carrier unit from FIG. 5 in a perspective view on the underside of the carrier unit,

[0040] FIG. 7a plan view of the grinding and/or polishing pad without a cover unit,

[0041] FIG. 8a plan view of the grinding and/or polishing pad without the cover unit with a dashed part of a drive interface unit, which is integrated into the carrier unit,

[0042] FIG. 9a plan view of an abrasive interface of the grinding and/or polishing pad,

[0043] FIG. 10a schematic diagram of a method for manufacturing a grinding and/or polishing pad device,

[0044] FIG. 11a plan view of a grinding and/or polishing pad in a first alternative embodiment,

[0045] FIG. 12a plan view of the grinding and/or polishing pad of FIG. 11 with the air channels shown in dash,

[0046] FIG. 13a perspective view of a part of the grinding and/or polishing pad shown in FIGS. 11 and 12,

[0047] FIG. 14a plan view of a grinding and/or polishing pad in a second alternative embodiment,

[0048] FIG. 15a lateral cross-sectional view of the grinding and/or polishing pad from FIG. 14.

DETAILED DESCRIPTION

[0049] FIG. 1 shows a grinding and/or polishing machine 12a having a grinding and/or polishing pad device 10a. The grinding and/or polishing pad device 10a corresponds to a grinding and/or polishing pad 48a. Alternatively, it is conceivable that the grinding and/or polishing pad device 10a is only a part of a grinding and/or polishing pad 48a, for example only has a drive interface unit 36a or the like.

[0050] FIG. 2 shows the grinding and/or polishing pad 48a, in particular the grinding and/or polishing pad device 10a. The grinding and/or polishing pad device 10a has a carrier unit 14a. The carrier unit 14a is provided for stiffening and/or stabilizing the grinding and/or polishing pad 48a. The carrier unit 14a is made in one piece. The carrier unit 14a is at least partially made of plastic, preferably polyamide, for example PA6-GF30.

[0051] The grinding and/or polishing pad device 10a has a drive interface unit 36a designed like a sprocket (see also FIG. 8). The drive interface unit 36a is provided for connecting the carrier unit 14a to the grinding and/or polishing machine 12a. The drive interface unit 36a is formed in one piece with the carrier unit 14a. The term at least one unit and at least one further unit are designed to be at least partially integral with one another is in particular understood to mean that at least one element of the unit is designed to be integral with at least one further element of the further unit. The term integral is to be understood in particular to mean at least a materially bonded connection, for example, by a welding process, an adhesive bonding process, an injection molding process and/or another process that appears to the person skilled in the art to be reasonable, and/or advantageously formed in one piece, for example, by production from a casting and/or by production in a single-component or multi-component injection molding process and advantageously from a single blank.

[0052] The drive interface unit 36a is at least partially integrated into the carrier unit 14a, in particular at least partially overmolded by the carrier unit 14a. Alternatively, it is conceivable that the drive interface unit 36a can be detachably fastened to the carrier unit 14a, for example by way of screwing, riveting or the like. The carrier unit 14a is intended to carry the drive interface unit 36a. The carrier unit 14a is preferably provided as a carrier for a padding unit 34a and/or an abrasive interface 80a. The drive interface unit 36a is preferably designed as a sintered component, a stamped component or a deep-drawn component. However, it is also conceivable that the drive interface unit 36a is designed as a die-cast component or forged component.

[0053] The grinding and/or polishing pad 48a, in particular the grinding and/or polishing pad device 10a, has the abrasive interface 80a. The abrasive interface 80a has an abrasive contact surface 88a for an abrasive and/or polishing agent (see FIG. 9). The abrasive contact surface 88a is circular. Alternatively, it is conceivable that the abrasive contact surface 88a is triangular, rectangular or square or has another shape that would appear useful to a person skilled in the art. In particular, the abrasive interface 80a has an abrasive fastening unit 90a for fastening the abrasive or the polishing agent to the abrasive interface 80a. For example, the abrasive fastening unit 90a has a hook-and-loop surface, an adhesive surface, a combination of these or the like for fastening the abrasive and/or the polishing agent. The abrasive fastening unit 90a, in particular the hook-and-loop surface and/or the adhesive surface, forms at least part of the abrasive contact surface 88a.

[0054] The abrasive interface 80a, in particular the abrasive contact surface 88a of the abrasive interface 80a, has a plurality of air passage openings, in particular suction openings 92a (in FIG. 9, only one of the suction openings 92a is provided with a reference numeral. The suction openings 92a have at least partially different shapes and/or sizes from one another. Alternatively, however, it is also conceivable that the suction openings 92a have the same shapes and/or sizes. The abrasive or the polishing agent preferably has suction openings corresponding to the suction openings 92a of the abrasive interface 80a.

[0055] The abrasive is designed as sandpaper, for example. The abrasive preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit 90a for fastening to the grinding and/or polishing pad 48a, preferably the abrasive interface 80a, for example a hook-and-loop surface and/or an adhesive surface or the like. The polishing agent is designed, for example, as polishing paper, a polishing sponge with polishing agents or similar. The polishing mechanism preferably has, in particular, a fastening unit corresponding to the abrasive fastening unit 90a for fastening to the grinding and/or polishing pad 48a, preferably the abrasive interface 80a, for example a hook-and-loop surface and/or an adhesive surface or the like.

[0056] On the machine side, the carrier unit 14a has at least several air channels 18a extending transversely with respect to a main standard 16a of the carrier unit 14a. Transverse should be understood in particular as meaning different from parallel. The air passage openings of the abrasive interface 80a are fluidly connected to the air channels 18a. It is conceivable that several air passage openings of the abrasive interface 80a are fluidly connected to one of the air channels 18a, for example two, three, four or more than four. In addition, it is conceivable that the abrasive interface 80a has at least one air passage opening, which is free from a connection with the transversely extending air channels 18a.

[0057] The term machine side is to be understood here in particular as a side of an object which faces the grinding and/or polishing machine 12a in a state of the grinding and/or polishing pad device 10a, in particular of the grinding and/or polishing pad 48a, arranged on the grinding and/or polishing machine 12a. A machine side 94a of the carrier unit 14a faces away from an abrasive side 96a of the carrier unit 14a. The abrasive side 96a is a side of the carrier unit 14a facing the abrasive interface 80a in a state of the abrasive interface 80a arranged on the carrier unit 14a.

[0058] The carrier unit 14a has a main extension plane 26a. The main extension plane of a structural unit or an element can be understood to mean a plane which is parallel to a largest side surface of a smallest possible imaginary cuboid, which just completely encloses the structural unit, and in particular extends through the center of the cuboid. The main standard 16a extends at least substantially perpendicular to the main extension plane 26a of the carrier unit 14a. The term substantially perpendicular can be understood to mean an alignment of a direction relative to a reference direction, wherein, in particular viewed in a projection plane, the direction and the reference direction enclose an angle of 90 and the angle has a maximum deviation of in particular less than 8, advantageously less than 5, and particularly advantageously less than 2.

[0059] The main standard 16a extends at least substantially parallel to a drive axis 98a of the drive interface unit 36a, particularly preferably the main standard 16a corresponds to the drive axis 98a. The air channels 18a extend at least substantially perpendicular to the main standard 16a of the carrier unit 14a. The air channels 18a extend at least substantially parallel to the main extension plane 26a of the carrier unit 14a.

[0060] The drive interface unit 36a and/or the carrier unit 14a, preferably the grinding and/or polishing pad device 10a, can be driven to rotate about the drive axis 98a in a state connected to the grinding and/or polishing machine 12a and/or can be driven in such a way that the drive axis 98a performs an eccentric movement . . . . It is also conceivable with an embodiment of the grinding and/or polishing machine 12a as an orbital or rotary grinder that the grinding and/or polishing pad device 10a only performs an orbital or circular movement without rotation, such as, for example, in an embodiment with a rectangular or square basic shape of the grinding and/or polishing pad device 10a. Substantially parallel can be understood here to mean an alignment of a direction relative to a reference direction, in particular in a plane, wherein the direction has a deviation relative to the reference direction that is in particular less than 8, advantageously less than 5 and particularly advantageously less than 2.

[0061] The grinding and/or polishing pad 48a, in particular the grinding and/or polishing pad device 10a, is set up for dust extraction. Configured should be understood to mean specifically programmed, designed, and/or equipped. In particular, the fact that an object is configured for a specific function should be understood to mean that the object fulfills and/or executes this specific function in at least one application state and/or operating state. The air channels 18a are configured as suction air channels. The air channels 18a are designed to guide grinding and/or polishing dust. The air channels 18a are preferably provided for guiding fresh air to the abrasive.

[0062] The grinding and/or polishing machine 12a has an suction fan for extracting grinding and/or polishing dust, which can be generated in particular by machining a workpiece by the grinding and/or polishing machine 12a, preferably via the air channels 18a (not shown here).

[0063] The grinding and/or polishing machine 12a has a drive unit, for example an electric motor, a pneumatic drive or the like, for driving the grinding and/or polishing pad 48a, in particular the grinding and/or polishing pad device 10a in a state connected to the grinding and/or polishing machine 12a (not shown here). It is conceivable that the grinding and/or polishing machine 12a is designed as an orbital sander, an orbital sander, an orbital sander or the like. The grinding and/or polishing machine 12a is designed to be cordless, in particular as a battery-operated grinding and/or polishing machine. Alternatively, it is conceivable that the grinding and/or polishing machine 12a is designed as a wired grinding and/or polishing machine.

[0064] The air channels 18a extend at least substantially radially with respect to the main standard 16a. The air channels 18a extend radially outwards at least in sections with respect to the main standard 16a. Some of the air channels 18a have a curved course, for example a winding course, when viewed in sections starting from the main standard 16a. A further part of the air channels 18a has a straight course over its entire length.

[0065] The grinding and/or polishing pad device 10a has a cover unit 20a. The cover unit 20a is arranged on the machine side on the carrier unit 14a. The cover unit 20a limits and/or at least partially closes the air channels 18a, in particular on the machine side.

[0066] The cover unit 20a is bonded to the carrier unit 14a. Alternatively, it is also conceivable that the cover unit 20a is detachably attached to the carrier unit 14a. In this context, the term detachable is in particular understood to mean non-destructively separable.

[0067] The cover unit 20a is provided to at least partially limit the air channels 18a on the machine side. A main extension plane (not shown here) of the cover unit 20a extends at least substantially parallel to the main extension plane 26a of the carrier unit 14a. The cover unit 20a is disk-shaped, preferably made of a plastic such as PVC, POM, PA or the like. The cover unit 20a can also be made of a composite material, for example a mixture of epoxy resin and glass fiber fabric or the like.

[0068] The cover unit 20a has a plurality of recesses 22a (in FIGS. 2 and 3, only one of the recesses 22a is provided with a reference numeral). The recesses 22a define air passage openings 24a for the air channels 18a on the machine side. Opening cross-sections of the recesses 22a run at least substantially parallel to the main extension plane 26a of the carrier unit 14a. The main extension plane 26a of the carrier unit 14a extends at least substantially parallel to a main extension plane (not shown here) of the abrasive interface 80a. The air passage openings 24a are designed as suction openings 46a for extracting grinding and/or polishing dust.

[0069] On the machining side, the carrier unit 14a has a plurality of rib structural elements 28a extending at least substantially radially, in particular radially straight, with respect to the main standard 16a (only two rib structural elements 28a of the plurality of rib structural elements 28a are shown in FIG. 6).

[0070] On the machining side is to be understood in particular as the abrasive side or the abrasive interface side. An abrasive side 96a or a machining side 32a of the carrier unit 14a faces away from the machine side 94a of the carrier unit 14a. The machining side 32a of the carrier unit 14a corresponds to the abrasive side 96a.

[0071] The carrier unit 14a has a carrier base body 100a. The rib structural elements 28 are formed integrally with the carrier base body 100a, preferably the carrier base body 100a has the rib structural elements 28a. The rib structural elements 28a are designed as walls.

[0072] The ribbed structural elements 28a form side walls 30a of the air channels 18a. Two ribbed structural elements 28a each form the side walls 30a of one of the air channels 18a. The ribbed structural elements 28a project beyond the air channels 18a on the machining side 32a of the carrier unit 14a in a direction parallel to the main standard 16a of the carrier unit 14a.

[0073] The grinding and/or polishing pad device 10a has the padding unit 34a. The padding unit 34a is foamed onto the carrier unit 14a on the machining side with respect to the carrier unit 14a. The padding unit 34a is made of a foam material. The abrasive fastening unit 90a is arranged on the padding unit 34a. The abrasive fastening unit 90a and the carrier unit 14a are arranged on opposite sides of the padding unit 34a, in particular the padding unit 34a is arranged between the carrier unit 14a and the abrasive fastening unit 90a. The rib structural elements 28a, in particular at least a respective part of the rib structural elements 28a projecting with respect to the air channels 18a, are/is foamed around by the padding unit 34a. An adhesive or activator can be applied between the padding unit 34a and the carrier unit 14a with the ribbed structural elements 28a before foaming in order to obtain a particularly robust adhesion of the padding unit 34a during foaming. The ribbed structural elements 28a are intended to transmit force, in particular torque transmission, from the carrier unit 14a to the padding unit 34a. The air channels 18a are foamed around by the padding unit 34a on the machining side.

[0074] The padding unit 34a has air passage openings corresponding to the air passage openings of the drive interface unit 80a and/or the air passage openings 38a of the carrier unit 14a.

[0075] The carrier unit 14 has a plurality of air passage openings 38a, each connected to one of the air channels 18a (only one of the air passage openings 38a is shown in FIG. 7). The air passage openings 38a of the carrier unit 14a correspond to the air passage openings of the abrasive interface 80a. The drive interface unit 36a has a plurality of teeth 40a, in particular evenly arranged teeth 40a, on an outer circumference. The drive interface unit 36a is rotationally symmetrical, preferably with respect to the drive axis 98a. One of the air passage openings 38a of the carrier unit 14a is arranged between each two adjacent teeth 40a of the drive interface unit 36a. The drive interface unit 36a has a machine connection contour 102a for connection to an output element of the grinding and/or polishing machine 12a. The machine connection contour 102a surrounds the drive axis 98a.

[0076] The drive interface unit 36a is formed in one piece. Alternatively, it is also conceivable that the drive interface unit 36a is formed in several parts, for example in two parts, three parts or the like. The drive interface unit 36a is exemplified here as a sintered component. Alternatively, it is conceivable that the drive interface unit 36a is designed as a sheet metal element. The drive interface unit 36a has a base body 104a. The base body 104a has the machine connection contour 102a. The machine connection contour 102a is arranged centrally on the base body 104a, in particular in a direction considered parallel to the drive axis 98a. In particular, the base body 104a has the teeth 40a.

[0077] The drive interface unit 36a has an offset shape (see FIG. 4). The drive interface unit 36a, in particular the base body 104a, has a centrally arranged offset 106a, preferably a centrally arranged projection, preferably viewed in a direction running parallel to the drive axis 98a. The machine connection contour 102a is arranged at the offset 106a. The offset 106a is surrounded in the radial direction, preferably with respect to the drive axis 98a, by an non-offset part 108a of the drive interface unit 36a, preferably of the base body 104a. The teeth 40a are arranged on the non-offset part 108a of the drive interface unit 36a, in particular of the base body 104a. The offset 106a is preferably arranged. The non-offset part 108a is arranged on the machining side.

[0078] The carrier unit 14a connects flush to a contact surface 50a of the drive interface unit 36a, in particular an offset machine-side outer surface 52a of the drive interface unit 36a, for a connection to the grinding and/or polishing machine 12a on the machine side. In particular, the contact surface 50a extends at least substantially perpendicular to the drive axis 98a.

[0079] The contact surface 50a is adjacent to the machine connection contour 102a. The machine connection contour 102a is provided for torque transmission from the grinding and/or polishing machine 12a to the grinding and/or polishing pad device 10a. The contact surface 50a is provided for an alignment and/or axial contact of the grinding and/or polishing pad device 10a on the grinding and/or polishing machine 12a.

[0080] The drive interface unit 36a, in particular the base body 104a, has a plurality of air passage openings 54a, in particular for dust extraction. Alternatively, it is conceivable that the drive interface unit 36a only has an air passage opening 54a. The air passage openings 54a are arranged between the drive axis 98a, preferably the machine connection contour 102a, and the teeth 40a when viewed radially, preferably radially with respect to the drive axis 98a. The air passage openings 54a of the drive interface unit 36a have a uniform and/or circular arrangement, in particular around the drive axis 98a. The air passage openings 54a of the drive interface unit 36a are arranged symmetrically around the drive axis 98a. The air passage openings 54a of the drive interface unit 36a are each part of an axial air guide aperture of the grinding and/or polishing pad device 10a, in particular of the grinding and/or polishing pad 48a.

[0081] The teeth 40a have at least partially different tooth heights. The teeth 40a have two different heights. Alternatively, it is conceivable that the teeth 40a have more than two different heights. Alternatively, it is also conceivable that the teeth 40a have the same height. The teeth 40a, which are arranged behind air passage openings 54a of the drive interface unit 36a when viewed in the radial direction, have the same height. The teeth 40a, which are arranged behind air passage openings 54a of the drive interface unit 36a when viewed in the radial direction, have a height which is different from, preferably smaller than, a height of teeth 40a which are arranged between two adjacent air passage openings 54a of the drive interface unit 36a in the circumferential direction, which in particular extends in a plane perpendicular to the drive axis 98a.

[0082] A ratio of a total height 64a of the grinding and/or polishing pad device 10a, which in particular extends perpendicular to a main extension plane 66a of the grinding and/or polishing pad device 10a, to a maximum diameter 68a of the grinding and/or polishing pad device 10a, which in particular extends parallel to the main extension plane 66a of the grinding and/or polishing pad device 10a, is at most 0.15.

[0083] A ratio of a maximum diameter 62a of the drive interface unit 36a to a maximum diameter 60a of the carrier unit 14a is at least 0.35.

[0084] FIG. 10 shows a schematic diagram of a method for manufacturing the grinding and/or polishing pad device 10a. In a method step, in particular in an injection molding process step 70a, the air channels 18a extending transversely to the main standard 16a are produced in the carrier unit 14a.

[0085] In a method step, in particular in the injection molding process step 70a, the drive interface unit 36a is at least partially integrated into the carrier unit 14a. In the injection molding process step 70a, the drive interface unit 36a is at least partially integrated into the carrier unit 14a with an offset shape and/or sprocket-like design, and in particular is at least partially overmolded by the carrier unit 14a.

[0086] In a method step, in particular in a foaming step 72a, the padding unit 34a is foamed onto the carrier unit 14a on the machining side. In particular, the abrasive interface 80a and the drive interface unit 36a are placed in an injection mold, in particular with a sleeve 56a and a cup spring 58a. Preferably, the padding unit 34a is formed from a foam material.

[0087] The sleeve 56a and/or the disk spring 58a are/is part of the grinding and/or polishing pad 48a, in particular of the grinding and/or polishing pad device 10a. The disk spring 58a is intended to build up an axial preload on a screw connection when mounted on the grinding and/or polishing machine 12a. The sleeve 56a is provided for integrating the cup spring 58a into the grinding and/or polishing pad 48a, in particular the grinding and/or polishing pad device 10a. The air passage openings in the padding unit 34a are produced in a method step, in particular by a stamping process.

[0088] In a method step, in particular in a grinding step 74a, the drive interface unit 36a is ground down on the machine side, in particular flush with the adjacent to the carrier unit 14a. The contact surface 50a of the drive interface unit 36a and/or a surface of the carrier unit 14a adjacent to the contact surface 50a, in particular on the machine side, is/are ground down, preferably such that the contact surface 50a and the surface of the carrier unit 14a adjacent to the contact surface 50a are flush with one another.

[0089] It is also conceivable that suction openings (cf. suction openings 78b of FIGS. 11 and 12) are created in a marginal area on a side facing away from the abrasive interface 80a in a method step.

[0090] The grinding and/or polishing pad 48a, in particular the grinding and/or polishing device 10a, has a weight of between 120 g and 140 g, preferably 130 g. Alternatively, however, it is also conceivable that the grinding and/or polishing pad 48a, in particular the grinding and/or polishing device 10a, has a weight which is less than 120 g or greater than 140 g.

[0091] For example, the drive interface unit 36a has a maximum diameter of 59 mm. The maximum diameter 68a of the grinding and/or polishing pad device 10a is 148 mm in this example.

[0092] FIGS. 11 to 15 show further exemplary embodiments. The following descriptions and the drawings are substantially limited to the differences between the exemplary embodiments, wherein reference may also be made in principle to the drawings and/or the description of the other exemplary embodiments, in particular FIGS. 1 to 10, with regard to identically described components, in particular with regard to components having the same reference numerals. To differentiate between the exemplary embodiments, the letter a is placed after the reference numerals of the exemplary embodiment in FIGS. 1 to 10. In the exemplary embodiments of FIGS. 11 through 15, the letter a is replaced by letters b and c.

[0093] FIG. 11 shows a grinding and/or polishing pad device 10b for a grinding and/or polishing machine. The grinding and/or polishing pad device 10b corresponds to a grinding and/or polishing pad 48b. The grinding and/or polishing pad device 10b has a carrier unit 14b. On the machine side, the carrier unit 14b has a plurality of transverse air channels 18b, in particular extraction air channels, with respect to a main standard 16b of the carrier unit 14b (see FIG. 12).

[0094] The grinding and/or polishing pad device 10b has a padding unit 34b arranged on the carrier unit 14b. An front face 42b of the padding unit 34b has recesses 44b spaced apart from one another along a circumferential direction, in particular recesses that differ from apertures (see FIG. 13).

[0095] The indentations 44b on the front face 42b are arranged evenly in the circumferential direction. The indentations 44b are arranged at a distance from one another in the circumferential direction. The indentations 44b each have a varying maximum depth when viewed in the circumferential direction. The maximum depth is measured radially with respect to the main standard 16b. Alternatively, it is also conceivable that the recesses 44b each have a constant depth when viewed in the circumferential direction.

[0096] An indentation area defined by the indentations 44b along the circumferential direction extends over at least 10% of a maximum circumferential extension of the front face 42b in the circumferential direction, preferably over at least 50%, preferably over at least 75%.

[0097] The grinding and/or polishing pad 48b, in particular the grinding and/or polishing pad device 10b, has an abrasive interface 80b. The grinding and/or polishing pad 48b, in particular the grinding and/or polishing pad device 10b, has a plurality of suction openings 46b arranged on a side facing away from the abrasive interface 80b.

[0098] The grinding and/or polishing pad 48b, in particular the grinding and/or polishing pad device 10b, has a plurality of suction openings 78b arranged in an edge region on the side facing away from the abrasive interface 80b, and in particular different from a lateral surface 110b, for drawing in ambient air. The suction openings 78b are arranged on the machine side.

[0099] The grinding and/or polishing pad 48b has an upper side, in particular on the machine side. The grinding and/or polishing pad 48b has an underside, in particular on the machining side. The upper side faces away from the underside. The suction openings 78b are arranged on the upper side, in particular on one side of the machine. The upper side corresponds to the machine side. The lateral surface 110b connects the upper side with the underside. The abrasive interface 80b, in particular an abrasive contact surface of the abrasive interface 80a, forms the underside.

[0100] The grinding and/or polishing pad 48b, in particular the grinding and/or polishing pad device 10b, has a cover unit 20b. The cover unit 20b is arranged on the machine side on the carrier unit 14b. The cover unit 20b has recesses 22b. The cover unit 20b has the suction openings 78b. Part of the recesses 22b form the suction openings 78b. Another part of the recesses 22b forms the suction openings 46b.

[0101] The cover unit 20b of the grinding and/or polishing pad 48b forms the upper side. The cover unit 20b is glued to the carrier unit 14b. Alternatively, it is also conceivable that the cover unit 20b is detachably attached to the carrier unit 14b.

[0102] A main extension plane of the cover unit 20b extends at least substantially parallel to a main extension plane of the carrier unit 14b. The cover unit 20b is disc-shaped, preferably made of plastic. The main extension plane of the carrier unit 14b extends at least substantially parallel to a main extension plane of the abrasive interface 80b.

[0103] Preferably, the grinding and/or polishing machine has an suction fan for extracting grinding and/or polishing dust, which can be generated in particular by machining a workpiece by the grinding and/or polishing machine, preferably via the grinding and/or polishing pad 48b.

[0104] The suction openings 78b are provided for supplying fresh air to the abrasive interface 80b. Fresh air can be drawn in through the suction fan via the suction openings 78b.

[0105] A respective opening cross-section of the suction openings 78b extends at least substantially parallel to the main extension plane (not shown here) of the abrasive interface 80b. The opening cross-sections of the suction openings 78b extend at least substantially perpendicular to a drive axis of a drive interface unit 36b of the grinding and/or polishing pad 48b. The main extension plane of the abrasive interface 80b corresponds to a main extension plane of the abrasive contact surface of the abrasive interface 80b. The main extension plane of the abrasive interface 80b extends at least essentially perpendicular to the drive axis.

[0106] A minimum distance between the suction openings 78b and the drive interface unit 36b is greater than a minimum distance between the suction openings 46b and the drive interface unit 36b. The minimum distance between the suction openings 78b and the drive interface unit 36b, in particular the drive axis, and/or the minimum distance between the suction openings 46b and the drive interface unit 36b, in particular the drive axis, are/is preferably measured in a plane perpendicular to the drive axis and/or parallel to the main extension plane of the abrasive interface 80b.

[0107] The suction openings 78b have a circular arrangement. The suction openings 78b are arranged in a circular shape around the drive interface unit 36b, in particular around the drive axis. It is conceivable that the suction openings 78b have a constant distance from one another in the circumferential direction, which in particular extends in a plane perpendicular to the drive axis, or that distances between the suction openings 78b vary in the circumferential direction.

[0108] The carrier unit 14b has a plurality of air channels 76b arranged on the machine side and extending transversely with respect to the main standard 16b, with one of each connecting to one of the suction openings 78b. The cover unit 20b limits and/or at least partially closes the air channels 76b.

[0109] The air channels 76b are designed as intake air channels for supplying fresh air to the abrasive interface 80b. It is conceivable that an air flow for drawing in fresh air can be generated by the suction fan via the air channels 76b. The air channels 76b extend at least substantially perpendicular to the main standard 16b of the carrier unit 14b. The air channels 76b extend at least substantially parallel to the main extension plane of the carrier unit 14b. The main standard 16b extends at least substantially perpendicular to the main extension plane of the carrier unit 14b. The main standard 16b extends at least substantially parallel to the drive axis of the drive interface unit 36b.

[0110] The air channels 76b extend at least substantially radially with respect to the drive interface unit 36b. The air channels 76b have a straight course over their entire length. Alternatively, it is conceivable that at least some of the air channels 76b extend radially outwards at least in sections with respect to the main standard 16b. Alternatively, for example, it is conceivable that at least some of the air channels 76b have a curved course, for example a winding course, when viewed in sections starting from the main standard 16b.

[0111] The grinding and/or polishing machine 12a has a housing component unit 82a, in particular a friction ring 84a. The housing component unit 82a, in particular the friction ring 84a, at least partially covers the suction openings 46b, in particular in a state of the grinding and/or polishing pad 48b arranged on the grinding and/or polishing machine 12a. The edge region, in particular the edge region comprising the suction openings 78b, is arranged outside the housing component unit 82a, in particular in a state of the grinding and/or polishing pad 48b arranged on the grinding and/or polishing machine 12a.

[0112] On the machine side, the carrier unit 14b has several air channels 18b running transversely with respect to the main standard 16b. The air channels 18b connect to the suction openings 46b. The air channels 18b are designed as suction air channels. At least some of the air channels 18b have a tortuous course, in particular when viewed in a radial direction with respect to the main standard 16b.

[0113] FIG. 14 shows a grinding and/or polishing pad device 10c for a grinding and/or polishing machine. The grinding and/or polishing pad device 10c corresponds to a grinding and/or polishing pad 48c. The grinding and/or polishing pad device 10b has a carrier unit 14c. The carrier unit 14c is designed as a metal plate, such as a steel plate, an aluminum plate or the like. The carrier unit 14c is free of air channels extending at least substantially transversely to a main standard of the carrier unit 14c.

[0114] The grinding and/or polishing pad 48c, in particular the grinding and/or polishing pad device 10c, has an abrasive interface 80c. The grinding and/or polishing pad 48c, in particular the grinding and/or polishing pad device 10c, has a plurality of suction openings 46c arranged on a side facing away from the abrasive interface 80c.

[0115] The grinding and/or polishing pad 48c, in particular the grinding and/or polishing pad device 10c, has several suction openings 78c arranged in a peripheral region on the side facing away from the abrasive interface 80c, and in particular different from a lateral surface 110c, for sucking in ambient air. The carrier unit 14c has several recesses 22c. The carrier unit 14c has the suction openings 78c. Part of the recesses 22c form the suction openings 78c. Another part of the recesses form the suction openings 46c.

[0116] A respective opening cross-section of the suction openings 78c extends at least substantially parallel to a main extension plane 86c of the abrasive interface 80c (see FIG. 15).

[0117] The grinding and/or polishing pad 48c, in particular the grinding and/or polishing pad device 10c, has a padding unit 34c. The padding unit 34c has axially extending air channels. The suction openings 78c are fluidly connected to the abrasive interface 80c, in particular outlet openings of the abrasive interface 80c, via a portion of the axially extending air channels. The suction openings 46c are fluidly connected to the abrasive interface 80c, in particular suction openings of the abrasive interface 80c, via a further part of the axially extending air channels.

[0118] The grinding and/or polishing pad 48c has a drive interface unit 36c. The drive interface unit 36c is riveted to the carrier unit 14c. The padding unit 34c is glued to the carrier unit 14c on the machining side.