DISC TOOL

Abstract

A disc tool for a processing machine for grinding and/or polishing a workpiece (W); wherein the disc tool (10A, 10B, 10B) has a carrier (20) for attachment to an output (85) of the processing machine (80); wherein a cushion element (40A, 40B, 40C) made of elastic material and a retaining wall element (41A, 41B, 41C, 41D) for retaining the cushion element (40A, 40B, 40C, 61) are arranged on the carrier (20); wherein the retaining wall element (41A, 41B, 41C, 41D) is held on the carrier (20) by means of retaining bolts (35); wherein retaining bolt passage openings (48) of the retaining wall element (41A, 41B, 41C, 41D) extending through retaining mounts (28), of the carrier (20) are accommodated along bolt sections (36) of the retaining bolts (35) extending along the bolt longitudinal axes (BL), and the retaining wall element (41A, 41B, 41C, 41D) is held between bolt heads (37) of the retaining bolts (35) and the carrier (20); and wherein an adhesive layer (50) is arranged on a side of the retaining wall element (41A, 41B, 41C, 41D) opposite the carrier (20), on which adhesive layer a processing means (70) for grinding and/or polishing the workpiece (W) can be releasably attached to the disc tool (10A, 10B, 10B). The adhesive layer (50) has recesses (52) assigned to the bolt heads (37).

Claims

1. A disc tool for a processing machine for grinding and/or polishing a workpiece, wherein the disc tool has a carrier for attachment to an output of the processing machine, wherein a cushion element made of elastic material and a retaining wall element for retaining the cushion element are arranged on the carrier, wherein the retaining wall element is retained on the carrier by means of retaining bolts, wherein bolt portions of the retaining bolts extending along the bolt longitudinal axes and extending through retaining bolt passage openings of the retaining wall element are accommodated in retaining mounts of the carrier, and the retaining wall element is held between bolt heads of the retaining bolts and the carrier, and wherein an adhesive layer is arranged on a side of the retaining wall element opposite the carrier, on which adhesive layer a processing means for grinding and/or polishing the workpiece can be releasably attached to the disc tool, and wherein the adhesive layer has recesses associated with the bolt heads, which recesses are present before the retaining bolts are screwed into the carrier and the cross-section of which provided to mount the bolt heads is greater than a cross-section of the retaining bolt passage openings.

2. The disc tool according to claim 1, wherein: a central axis or a center of at least one recess is concentric with respect to the bolt longitudinal axis of the retaining bolt accommodated in the recess; and/or at least one of the recesses or all recesses of the adhesive layer has or have an inner diameter that is at least as large as an outer diameter of a bolt head accommodated in the recess or is larger than an outer diameter of a bolt head accommodated in the recess; and/or a material thickness of the adhesive layer or of an adhesive layer element having and/or supporting the adhesive layer is reduced to provide the recesses; and/or the adhesive layer has passage openings through which the bolt heads can penetrate the adhesive layer; and/or at least one of the recesses or all recesses of the adhesive layer has or have a larger cross-section and/or diameter than the bolt heads, so that a distance is advantageously present between an inner circumference of a respective recess and an outer circumference of the bolt head accommodated in the recess, transverse to the bolt longitudinal axis thereof.

3. The disc tool according to claim 1, wherein at least one of the recesses or all recesses forms or form a displacement cavity into which components of the retaining wall element and/or of the cushion element can be displaced or are displaced.

4. The disc tool according to claim 1, wherein at least one of the recesses or all recesses is or are formed and/or designed for accommodating a bulge of the cushion element and/or of the retaining wall element.

5. The disc tool according to claim 1, wherein at least one of the recesses or all recesses is or are deeper with respect to the adhesive layer in a region radially closer to the bolt longitudinal axis of the retaining bolt accommodated therein than in a region further away radially from the bolt longitudinal axis.

6. The disc tool according to claim 1, wherein the retaining wall element consists of a material with a higher tensile strength than the cushion element.

7. The disc tool according to claim 1, wherein the cushion element is arranged as an intermediate layer between the carrier and the retaining wall element.

8. The disc tool according to claim 7, wherein the bolt portions of the retaining bolts pass through the retaining wall element and the cushion element, and/or the cushion element is compressed between the bolt heads of the retaining bolts and the carrier.

9. The disc tool according to claim 7, wherein a connecting wall element is arranged between the cushion element and the carrier, wherein the connecting wall element consists of a material with a higher tensile strength than the elastic material of the cushion element.

10. The disc tool according to claim 7, wherein the cushion element and the retaining wall element and/or the cushion element and the connecting wall element form a sandwich-like connected unit or a composite element, on which the recesses are formed.

11. The disc tool according to claim 1, wherein the recesses are formed by a thermal and/or machining and/or abrasive and/or cutting and/or pressure-loading and/or embossing process that reduces a material thickness of the adhesive layer and/or of an adhesive layer element having the adhesive layer.

12. The disc tool according to claim 1, further comprising an adhesive layer element which has an adhesive layer wall with the adhesive layer and is arranged on the retaining wall element.

13. The disc tool according to claim 12, wherein the adhesive layer element is held on the retaining wall element in a materially-fitting and/or form-fitting manner.

14. The disc tool according to claim 12, wherein the retaining wall element has a hook arrangement and/or Velcro hooks for retaining the adhesive layer element.

15. The disc tool according to claim 12, wherein the adhesive layer element has at least one adhesive layer cushion element made of an elastic material arranged between the adhesive layer wall and the retaining wall element and/or wherein the cushion element is arranged between the adhesive layer wall and the retaining wall element.

16. The disc tool according to claim 15, wherein the adhesive layer cushion element has passage openings through which the bolt heads penetrate and/or through which the bolt heads can be inserted or have been inserted freely, and/or the adhesive layer cushion element is not tensioned by the bolt heads against the carrier and/or the adhesive layer cushion element is arranged on the adhesive layer element on a side facing away from the bolt heads.

17. The disc tool according to claim 12, wherein the adhesive layer element has an intermediate wall element which is arranged between the adhesive layer cushion element and the retaining wall element and is connected to the retaining wall element.

18. The disc tool according to claim 17, wherein the intermediate wall element consists of a material which has a higher tensile strength than the adhesive layer cushion element.

19. The disc tool according to claim 12, wherein the adhesive layer cushion element and the intermediate wall element and/or the adhesive layer wall form a sandwich-like connected unit or an adhesive layer composite element, on which the recesses are formed.

20. The disc tool according to claim 1, wherein the adhesive layer is arranged on the retaining wall element and/or the retaining wall element integrally comprises the adhesive layer.

21. The disc tool according to claim 1, wherein the adhesive layer has a Velcro layer with Velcro hooks for retaining the processing means.

22. The disc tool according to claim 1, wherein the adhesive layer and the cushion element consist of different materials and/or are different layers.

23. The disc tool according to claim 1, wherein the adhesive layer completely or essentially completely covers a side of the disc tool facing away from the carrier, apart from flow-passage openings and/or an opening for a tool mount of the disc tool which is provided and suitable for attachment to an output of the processing machine.

24. The disc tool according to claim 1, wherein slots extend radially away from the retaining bolt passage openings, so that a region of the retaining wall element surrounding a respective retaining bolt passage opening is segmented.

25. The disc tool according to claim 1, wherein a tool mount or a tool-mounting element having a tool mount is arranged on the carrier, wherein the disc tool can be detachably connected to an output of the processing machine by means of the tool mount.

26. The disc tool according to claim 1, further comprising at least one flow-passage channel for air, which has inflow openings on the adhesive layer and outflow openings on the carrier, wherein air can flow through the at least one flow-passage channel from the adhesive layer in the direction of the carrier or, vice versa, from the carrier in the direction of the adhesive layer.

27. The disc tool according to claim 1, wherein the processing means is an abrasive sheet and/or the disc tool comprises the processing means.

28. A processing machine with a disc tool according to claim 1, wherein the processing machine has a drive with a drive motor for the disc tool, by means of which the disc tool can be driven by the processing machine to perform a rotary and/or eccentric and/or oscillatory movement.

29. The processing machine according to claim 28, further comprising a long-neck grinder.

30. A method for producing a disc tool for a processing machine for grinding and/or polishing a workpiece, wherein the disc tool has a carrier for attachment to an output of the processing machine, wherein a cushion element made of elastic material and a retaining wall element for retaining the cushion element are arranged on the carrier, wherein the retaining wall element is retained on the carrier by means of retaining bolts, wherein bolt portions of the retaining bolts extending along the bolt longitudinal axes and extending through retaining bolt passage openings of the retaining wall element are accommodated in retaining mounts of the carrier, and the retaining wall element is held between bolt heads of the retaining bolts and the carrier, and wherein an adhesive layer is arranged on a side of the retaining wall element opposite the carrier, on which adhesive layer a processing means for grinding and/or polishing the workpiece can be releasably attached to the disc tool, the method comprising: producing recesses associated with the bolt heads in the adhesive layer, wherein the cross-section thereof provided to accommodate the bolt heads is greater than a cross-section of the retaining bolt passage openings; arranging the retaining wall element on the carrier after the recesses are produced; fastening the retaining wall element to the carrier by inserting the retaining bolts into the retaining mounts, wherein the bolt heads are arranged in the recesses; and fixing the retaining wall element between the bolt heads of the retaining bolts and the carrier.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0105] Exemplary embodiments of the invention are explained below with reference to the drawing. The following is shown in the figures:

[0106] FIG. 1 a schematic view of a processing machine and a sectional view of a disc tool arranged on the processing machine approximately along a section line A-A; which is shown in

[0107] FIG. 2 which shows a cushion element and an adhesive layer element of the disc tool according to FIG. 1 in a perspective view from the processing side thereof;

[0108] FIG. 3 a section B of FIG. 1;

[0109] FIG. 4 a schematic view of the processing machine according to FIG. 1 and a sectional view of a second disc tool, approximately along a section line C-C; which is shown in

[0110] FIG. 5 which shows a cushion element and an adhesive layer of the disc tool according to FIG. 4 in a perspective view from the processing side thereof;

[0111] FIG. 6 a section D of FIG. 4;

[0112] FIG. 7 a sectional view of a third disc tool that can be operated with the processing machine according to FIGS. 1 and 4, approximately along a section line E-E; which is shown in

[0113] FIG. 8 which shows a cushion element with an adhesive layer the disc tool according to FIG. 7 in a perspective view from the processing side thereof;

[0114] FIG. 9 a section F of FIG. 7;

[0115] FIG. 10 an exploded view of the disc tool according to FIGS. 1-3 and the sub-components thereof;

[0116] FIG. 11 a section of an adhesive layer of a disc tool with signs of wear, approximately corresponding to a section G in FIG. 8;

[0117] FIG. 12 a partial section of a disc tool having the adhesive layer according to FIG. 11, approximately corresponding to the section according to FIG. 6, wherein the adhesive layer is unprocessed;

[0118] FIG. 13 a partial section of the disc tool according to FIG. 6, approximately corresponding to section D, wherein Velcro hooks of the adhesive layer are shown;

[0119] FIG. 14 a schematic view of processing of a composite element for a disc tool using a thermal processing tool;

[0120] FIG. 15 a schematic view of processing of a composite element for a disc tool using an abrasive or cutting processing tool; and

[0121] FIG. 16 a variant of the exemplary embodiment of FIGS. 1-3, approximately corresponding to a section as in FIG. 3.

DETAILED DESCRIPTION

[0122] A processing machine 80 is, for example, a grinding machine and/or a polishing machine. The processing machine 80 has, for example, a housing 81 from which a handle 82 protrudes, which can be gripped by an operator.

[0123] The handle 82 can be a short handle.

[0124] Preferably, the handle 82 is designed as an elongated handle bar, on one end region of which a handle for grasping by an operator is arranged and on the other end region of which the housing 81 is arranged, so that a ceiling or a wall, for example, can be processed. For example, the processing machine 80 is a so-called long-neck grinder.

[0125] An electric and/or pneumatic drive motor 83 is arranged in the housing 81 and drives an output 85 via a gear 84, for example in a rotary and/or eccentric and/or oscillating manner. Corresponding oscillating and/or eccentric and/or rotary driving gears 84 are known. The output 85 forms a tool mount and is arranged in an extraction housing 86.

[0126] Disc tools 10A, 10B, and 10C explained below are optimally adapted to operation with the processing machine 80 because they can withstand the forces and loads generated by the output 85 that are necessary, for example, for grinding or polishing a workpiece W using the disc tools 10A, 10B, 10C.

[0127] Insofar as the disc tools 10A, 10B, 10C have the same or similar components, they are provided with the same reference symbols in the following description. Wherever possible, similar components are provided with the same numbers, which, however, are provided with additional letters A, B, and C for assignment to the respective disc tool 10A, 10B, 10C. When all disc tools 10A, 10B, 10C are meant, they are referred to generically as disc tools 10.

[0128] The disc tools 10 each have a tool mount 11 which can be fastened to the output 85. The tool mount 11 can, for example, be a bayonet tool mount with bayonet contours for fastening the output 85. It is also possible that the tool mount 11 has, for example, a screw mount or passage opening for a fastening screw arranged on the output 85. In any case, the disc tools 10 can be detachably fastened to the output 85 using the tool mounts 11.

[0129] The tool mounts 11 are arranged on a machine side MS of the disc tools 10 provided for attachment to the processing machine 80. A processing side BS, which is opposite the machine side MS, is used to process the workpiece W.

[0130] The tool mounts 11 are located in a center Z of the disc tools 10 through which an axis DA passes. The axis DA passes through the disc tools 10 vertically from the machine side MS to the processing side B. The axis DA can, for example, be an axis of rotation about which the disc tool can be driven in a rotary manner when a respective disc tool 10 is used on the processing machine 80. The axis DA passes through a center Z of a respective disc tool 10.

[0131] The disc tools 10 are, for example, essentially circular.

[0132] Furthermore, the disc tools 10 have flow-passage channels 12 that extend from the processing side BS to the machine side MS and have inflow openings 13 on the processing side BS, which are fluidically connected to outflow openings 14 on the machine side MS. The outflow openings 14 are arranged in the extraction housing 86 when the disc tool 10 is mounted on the processing machine 80. Thus, dust-laden air SL can flow through a respective disc tool 10 in the direction of the machine side MS via the inflow openings 13, where the dust-laden air SL flows into the extraction housing 86. An extraction connection 87 communicates with the extraction housing 86, to which, for example, an extraction hose of a vacuum cleaner can be connected.

[0133] The outflow openings 14 can be arranged on a cover 33 of the carrier 20 which provides or has the wall surface 22 in whole or in part and with which a base body 34 of the carrier 20 is covered on the machine side MS. The cover 33 covers, for example, the channel structures of the flow-passage channels 12 that can be seen in FIG. 10, either completely or partially on the machine side MS.

[0134] The disc tools 10 have carriers 20. The carriers 20 are, for example, plate-like. The carriers 20 have the same structure for all disc tools 10, so that one carrier 20 is explained in the following description.

[0135] The carrier 20 has a mounting surface 21, which is assigned to the processing side BS, and a wall surface 22 opposite the mounting surface 21, which is at least partially covered by the extraction housing 86 when the disc tool 10 is arranged on the processing machine 80. The outflow openings 14 are arranged in a ring around the center Z on a radially inner part of the wall surface 22.

[0136] Inflow openings 23 are provided on the mounting surface 21, through which inflow openings dust-laden air SL can flow into the carrier 20 and to the outflow openings 14. The inflow openings 23 are arranged in a ring around a center Z or in a ring around the tool mount 11. Furthermore, the inflow openings 23 extend radially inwards in the direction of the center Z of the carrier 20 or in the direction of the tool mount 11, so that dust-laden air SL can also be extracted radially inwards with respect to an outer circumference 24 of the carrier 20.

[0137] It is then possible in principle for the carrier 20 to have the tool mount 11 integrally. In the present case, however, there is a multi-part design, i.e. the carrier 20 has a mount 25 for a tool-mounting element 30 on which the tool mount 11 is arranged. The mount 25 has, for example, an insertion opening 26 that extends from the machine side to the processing side BS and from which the retaining mounts 27 extend radially outward like fingers. A base body 31 of the tool-mounting element 30 is accommodated in the insertion opening 26 and rests, for example, on the base 26A thereof or opposite the base 26A. Fastening arms 32 protrude radially outwards from the base body 31 with respect to the axis DA and engage the retaining mounts 27 in a form-fitting manner. The fastening arms 32 are bolted to the carrier 20 using screws 32A.

[0138] Retaining mounts 28 in the form of screw mounts 29 are provided on the mounting surface 21, with which screw mounts the further components of disc tools 10A, 10B, and 10C explained below can be attached or are attached to the respective carrier 20. Each screw mount 29 has a screw thread 29A, for example. Bolt sections 36 of retaining bolts 35 with the screw threads 36A thereof can be screwed into the screw mount 29 or unscrewed from the screw mount 29. For example, actuation contours 38, for example slots, cross-slots, or the like, are provided on the bolt heads 37, which slots can be actuated using an assembly tool, in particular a screwdriver. Thus, the cushion elements 40A, 40B, 40C can be releasably attached to the carrier 20.

[0139] Bolt heads 37 of the retaining bolts 35 then support the further components of the disc tools 10 on the mounting surface 21 as explained below, in particular in terms of tensioning these further components with the mounting surface 21, so that they are firmly held on the respective carrier 20.

[0140] The disc tools 10A, 10B, 10C have cushion elements 40A, 40B, 40C on the processing sides BS thereof.

[0141] Each cushion element 40A, 40B, 40C is sandwiched between a retaining wall element 41A, 41B, 41C and a connecting wall element 42, for example. Thus, the cushion elements 40A, 40B, 40C can also be referred to as sandwich cushion elements.

[0142] The cushion elements 40A, 40B, 40C consist, for example, of rubber, foam, or other similar elastic material. For the cushion elements 40A, 40B, 40C, the retaining wall elements 41A, 41B, 41C and the connecting wall elements 42 are, so to speak, laminations or covers which ensure a uniform introduction of force onto a respective cushion element 40A, 40B, 40C.

[0143] For example, the connecting wall elements 42 and the retaining wall elements 41A, 41B, 41C consist of a textile material, a fabric, in particular a textile fabric, a knitted fabric, a nonwoven, velour, or the like.

[0144] In any case, at least the retaining wall element 41A, 41B, 41C consists of a material that has a higher tensile strength than the cushion element 40A, 40B, 40C.

[0145] The connecting wall element 41A, 41B, 41C preferably also consists of a material that has a higher tensile strength than the cushion elements 40A, 40B, 40C.

[0146] It is also possible for the retaining wall element 41A, 41B, 41C and/or the connecting wall element 42 to consist of a Velcro fabric which has Velcro hooks.

[0147] The cushion elements 40A, 40B, 40C are firmly connected to the retaining wall elements 41A, 41B, 41C and the connecting wall elements 42, so that composite elements 43A, 43B, 43C are formed. For example, the cushion elements 40A, 40B, 40C, the retaining wall elements 41A, 41B, 41C, and the connecting wall elements 42 are welded, glued, or similarly connected to one another in a material connection. A form-fitting connection, which can be provided in addition to the material-fitting connection or as an alternative to the material-fitting connection, is easily possible between the cushion element 40A, 40B, 40C and the retaining wall element 41A, 41B, 41C and the connecting wall element 42 of a respective composite element 43A, 43B, 43C.

[0148] The composite elements 43A, 43B, 43C are attached to the carriers 20 as a whole by means of the retaining bolts 35. The retaining bolts 35, with the bolt sections 36 thereof, penetrate retaining bolt passage openings 48 which are flush with the retaining mounts 28 of the carrier 20 when a respective composite element 43A, 43B, 43C is attached to the carrier 20. Consequently, retaining bolt passage openings 48 are arranged in a ring around the axis DA or a center Z of a respective cushion element 40A, 40B, 40C.

[0149] The composite elements 43A, 43B, 43C and thus the components thereof, namely the cushion element 40A, 40B, 40C, the retaining wall element 41A, 41B, 41C, and the connecting wall element 42, have flow-passage openings or flow-passage channels 45, which form components of flow-passage channels 12. The flow-passage openings or flow-passage channels 45 are flush with the inflow openings 23 on the wall surface 22 of the carrier 20. For example, flow-passage openings or flow-passage channels 45 arranged radially with respect to the axis DA and/or flow-passage openings or flow-passage channels 45 arranged annularly along an outer circumference 44 are provided.

[0150] The retaining wall elements 41A, 41B, 41C serve to support an adhesive layer 50 to which a processing means 70 can be attached. The processing means 70, for example, is an abrasive sheet 71, which can be attached to the adhesive layer 50 with a mounting side 72 and has a processing side 73, which is opposite the mounting side 72 and has a material suitable for processing the workpiece W, for example a grain, a nonwoven, or the like. The mounting side 72 has, for example, a loop fabric which is suitable for producing a Velcro connection with Velcro hooks 51 of the adhesive layer 50.

[0151] The processing means 70, for example the abrasive sheets 71, have flow-passage openings or flow-passage channels 75 that correspond to the inflow openings 13 or the flow-passage openings or the flow-passage channels 45 and are flush thereto when mounted on the disc tool 10, so that dust-laden air can flow from the processing side 73 to the mounting side 72 and into the inflow openings 13.

[0152] In the case of disc tool 10B, the adhesive layer 50 is arranged directly on the retaining wall element 41B. Consequently, the retaining wall element 41B forms an adhesive layer element 60B.

[0153] In the case of disc tools 10A and 10C, adhesive layer elements 60A, 60C are provided which are separate from the retaining wall elements 41A, 41C and have the adhesive layer 50.

[0154] The adhesive layer element 60A has an adhesive layer cushion element 61 sandwiched between an intermediate wall element 62 and an adhesive layer wall 63A. The adhesive layer cushion element 61, together with the adhesive layer wall 63A and the intermediate wall element 62, forms an adhesive layer composite element 64; the components thereof which are the adhesive layer wall 63A, the cushion element 61, and the intermediate wall element 62 are firmly connected to one another, for example glued together.

[0155] The adhesive layer cushion element 61 is made of an elastic, resilient material such as foam, rubber, or the like.

[0156] Similar to the composite element 43A, 43B, 43C, the adhesive layer composite element 64 has the adhesive layer cushion element 61 reinforced or laminated by the outer components of the adhesive layer composite element 64, namely the intermediate wall element 62 and the adhesive layer wall 63A, because the intermediate wall element 62 and the adhesive layer wall 63A consist, for example, of a material that has a higher tensile strength than the material of the adhesive layer cushion element 61, for example a woven fabric, a knitted fabric, a nonwoven, or the like.

[0157] The adhesive layer 50 is arranged on the adhesive layer wall 63A. The adhesive layer 50 also has Velcro hooks 51 in the adhesive layer element 60A, which, however, are not shown in the drawing for reasons of simplification.

[0158] The adhesive layer element 60C consists only of an adhesive layer wall 63C, which is arranged directly on the retaining wall element 41C, for example glued thereto. The adhesive layer wall 63C supports the adhesive layer 50 or has the adhesive layer 50, i.e. it is provided with the Velcro hooks 51, for example (which is not shown in the drawing).

[0159] Adhesive layer elements 60A and 60C are firmly connected to the retaining wall element 41A, 41C, for example glued and/or form-fittingly connected.

[0160] For example, a combination of form-fitting and material-fitting connection is advantageous. For example, the intermediate wall element 62 and the retaining wall element 41A can be designed to produce a Velcro connection, wherein, for example, Velcro hooks are present on the retaining wall element 41A and associated loops are on the intermediate wall element 62 or vice versa. Additional gluing, welding, or the like of the intermediate wall element 62 and the retaining wall element 41A ensures a material-fitting, firm, and thus shear-resistant connection between the two composite elements 43A and 64, transversely to axis DA.

[0161] The adhesive layer element 60C has, for example, a Velcro layer or Velcro hooks in the manner of the Velcro hooks 51 according to FIG. 13, wherein this not shown for reasons of simplification in the case of adhesive layer element 60C.

[0162] The retaining wall elements 41A, 41B, 41C can be loaded by the bolt heads 37 when the retaining bolts 35 are screwed into the retaining mounts 28 in such a way that they tension and compress the cushion elements 40A, 40B, 40C in the direction of the carrier 20. The retaining wall elements 41A, 41B, 41C form funnel-shaped or conical wall sections 141 next to the bolt heads 37, which wall sections extend annularly around the bolt longitudinal axes BL of the retaining bolts 35 and/or the retaining bolt passage openings 48. Close to the respective bolt head 37, thus the material of the cushion element 40A, 40B, 40C is almost completely displaced in the direction of the carrier 20 or the mounting surface 21, while the force exerted onto the retaining wall element 41A, 41B, 41C and thus onto the cushion element 40A, 40B, 40C by the bolt head 37 is less at a greater radial distance from the bolt longitudinal axis BL of a respective retaining bolt 35 or the retaining bolt passage openings 48.

[0163] FIGS. 11, 12 show a situation which arises without the measures, which are still to be explained. In addition to the funnel-shaped section 141, material of the cushion element 40B displaced by the retaining wall element 41B and/or the retaining wall element 41B itself forms a bulge 142, which is generated by the application of force by the bolt head 37. This bulge 142 also forms a bulge 143 on the adhesive layer 50 or on the retaining wall element 41B so that the adhesive layer 50 also has an unevenness. Both the adhesive layer 50 and the processing means 70 or abrasive sheet 71 arranged thereon are thus subjected to greater pressure in the direction of the workpiece W by the bulge 143, so that greater abrasion or more wear takes place, which can be seen in FIG. 11.

[0164] It is advantageously provided that the retaining wall element 41, as shown by way of example on retaining wall element 41A, has slots 49 which extend radially outwards and/or in a star shape around the retaining bolt passage openings 48. The retaining wall element 41 adapts to the contour of the bolt heads 37 through the slots 49.

[0165] Such a bulge is avoided by the measures explained below, or the effect thereof is at least reduced in such a way that the adhesive layer 50 does not have a contour protruding towards the processing means 70 in the region and/or the vicinity of the bolt heads 37 of the retaining bolts 35, but at most a depression is present, so that the unevenness or ring-shaped characteristics of the adhesive layer 50 shown in FIG. 11 are avoided.

[0166] For this purpose, a recess 52 is provided in the adhesive layer 50 in the region and/or in the vicinity of the bolt heads 37.

[0167] The recesses 52 have cross-sections Q52 which are larger than the cross-sections Q48 of the retaining bolt passage openings 48. The cross-sections Q52 are provided for mounting the bolt heads 37. A cross-section Q52 is at least large enough for the bolt head 52 to be fully accommodated in the respective recess 52. It is also possible, for example according to FIG. 6, that a cross-section Q52A is provided for a recess 52, which cross-section is greater than the cross-section of the bolt head 37 accommodated in the recess 52.

[0168] The bolt sections 36 of the retaining bolts 35 pass through retaining bolt passage openings 53 of the adhesive layer 50. The recesses 52 extend around the retaining bolt passage openings 53. As will become clear, the retaining bolt passage openings 53 can have a smaller inner cross-sectional area than the recesses 52. However, it is also possible for the recesses 52 to have an inner cross-sectional area in which a respective bolt head 37 can be completely accommodated, so that the recess 52 at the same time forms a retaining bolt passage opening 53 for the bolt section 36 of a retaining bolt 35.

[0169] In the case of adhesive layer element 60A, it is provided that each layer, namely the adhesive layer 50, the adhesive layer wall 63A, the adhesive layer cushion element 61, and the intermediate wall element 62, have passage openings 66, 67, and 68. Passage openings 66, 67, and 68 advantageously have a larger cross-section and/or diameter than a depression 144 which results from the tensioning of the retaining wall element 41A and thus the compression of the cushion element 40A by the bolt heads 37. It is also possible for passage openings 66, 67, and 68 to have a cross-section and/or diameter that is at least as large as that of the depression 144.

[0170] The depressions 144 are, for example, funnel-shaped.

[0171] If a bulge 145 in the manner of bulge 142 or 143 forms on the circumferential edge of a respective depression 144, which is shown schematically in the drawing, this bulge 145 can be on the inner circumference of the recess 52, for example on the inner circumference of the layers of the adhesive layer composite element 64 that are spaced apart from the adhesive layer 50, for example on the inner circumference of passage openings 68 and/or 67. Thus, passage openings 66, 67, and 68 and in any case the recess 52 form an expansion cavity or displacement cavity 69 for the material of the cushion element 40A.

[0172] However, the depressions 144 shown in FIGS. 2 and 10 do not result until the retaining bolts 35 are screwed into the carrier 20. To illustrate this effect, however, the depressions 144 are illustrated in the composite element 43A shown in perspective, even if the retaining bolts 35 are not shown.

[0173] In the case of disc tool 10C, the adhesive layer element 60C has the adhesive layer 50. In order to provide the recess 52, the adhesive layer element 60C has a passage opening 68, the diameter of which is at least the same size as the depression 144 already explained, which results from the application of force onto the cushion element 40C and the retaining wall element 41C by a respective retaining bolt 35. It is also possible for the diameter of the passage opening 68 to be larger than the diameter of the depression 144. Any bulge 145 that may result from this can swell into the region or the plane of the adhesive layer 50 without protruding in front of the adhesive layer 50 in the direction of the processing means 70. The recess or passage opening 68 on the adhesive layer element 60C and therefore the adhesive layer 50 thereof thus forms a displacement cavity 69 for the material of the adhesive layer element 41C and/or the cushion element 40C and/or the composite element 43C. However, due to the weakening and/or removal of the adhesive layer 50, by means of which the recess 52 is formed, the respective bolt head 37 only rests on the retaining wall element 41C and not on the adhesive layer 50, so that the bulge 145 does not form or only to a small extent and/or the bulge 145 does not affect the geometry and/or the profile of the adhesive layer 50.

[0174] On the other hand, in the case of disc tool 10B, the adhesive layer 50 is arranged integrally on the retaining wall element 41B. However, the adhesive layer 50 is partially reduced in height or thickness or material strength, for example by means of a thermal and/or plastically deforming and/or pressure-loading processing tool 200 according to FIG. 14 or an abrasive or cutting processing tool 300 according to FIG. 15.

[0175] The recesses 52 are formed as depressions in the adhesive layer 50 and/or the retaining wall element 41B, wherein these depressions comprise a section 167 close to the retaining bolt passage openings 48 and a section 168 which has a larger radial distance to the bolt longitudinal axis BL. Consequently, the recesses 52 in the region of sections 167 are deeper in relation to the adhesive layer 50 or the free surface thereof for attaching the processing means 70, while sections 168 are provided at a greater radial distance from the bolt longitudinal axis BL or the retaining bolt passage opening 48, which sections are less deep behind the surface of the adhesive layer 50.

[0176] In the region of the sections 167, the adhesive layer 50 and/or the retaining wall element 41B is significantly weakened or no longer exists at all. This makes it possible, for example, for the load on the cushion element 40B and/or the retaining wall element 41B and/or the composite element 43B generated by the bolt heads 37 of the retaining bolts 35 to be reduced and/or balanced, in particular with regard to the adhesive layer 50. In this context, it can advantageously result that the displacement of the material of the cushion element 40B and/or the composite element 43B and/or the retaining wall element 41B is reduced in terms of the formation of a bulge. However, it is also possible that a respective recess 52 accommodates a bulge that forms or is formed by a load on the cushion element 40B and/or the retaining wall element 41B and/or the composite element 43B.

[0177] For example, the tool 200 comprises a support element 201, which is opposite an embossing element 202. On its side opposite the support element 201, the embossed element 202 has an embossed contour 203 which interacts with a counter-bearing contour 204 of the support element 201. Embossed contour 203 has a cross-section and/or diameter that corresponds to the cross-section or diameter of the recess 52 of the support element 10B to be produced, i.e., for example, it has section 267 for producing section 167 of the depression or recess 52 and section 268 for producing section 168 of the recess 52. The counter-bearing contour 204 has a profile that matches the embossed contour 203. For example, the counter-bearing contour 204 and the embossing contour 203 have the same cross-sections or diameters.

[0178] The support element 201 and the embossed element 202 can have centering contours 205 and 206 for centering with respect to one another. Centering contour 205 is designed as a mount, for example, while centering contour 206 is designed as a projection that can be accommodated by the mount or centering contour 205. The centering projection or the centering contour 206, for example, can penetrate a respective retaining bolt passage opening 48 and then penetrate the mount or centering contour 205.

[0179] The embossing element 202 can be adjusted between an embossing position or processing position WP illustrated in dashed lines and a rest position RP illustrated in solid lines by a schematically illustrated actuator 207.

[0180] Furthermore, the embossing element 202 is heated using a heater 208. If the embossing element 202 acts on the adhesive layer 50 of the composite element 43B in the manner of an embossing die, the Velcro hooks 51 deform to different extents, which is shown in FIG. 13 as an example for Velcro hooks 51A and 51B. In addition to the depression 52, the Velcro hooks 51 project completely in front of the retaining wall element 41B, while they project less far in front of the retaining wall element 41B in the region of the depression 52, that is to say they have completely or partially melted away. In principle, it is possible for the Velcro hooks 51 to at least partially melt due to the load from the embossing element 202 and the thermal effect.

[0181] At this point it should be mentioned that embossing element 202 could also be operated without heating, so that only a mechanical, plastic deformation of the adhesive layer 50 is effected.

[0182] Alternatively, it is also possible that embossing element 202 does not have the function of an embossing element, but only provides a deformation contour that acts on the adhesive layer 50 with little force due to the heater 208, so that a thermal deformation of the adhesive layer 50 can essentially be achieved.

[0183] A grinding or abrasive processing is shown in FIG. 15 in connection with the processing tool 300. The processing tool 300 has a support element 301 in the manner of support element 201, which is opposite a grinding tool 302 in the manner of the embossing stamp or embossing element 202.

[0184] A counter-bearing contour 304 in the manner of counter-bearing contour 204 is arranged on the support element 301. Support element 301 also has a centering contour 305 in the manner of centering contour 205, which interacts with a centering contour 306 of the processing element 302, i.e., for example, in the manner in which centering contour 206 is designed as a centering projection that can penetrate into a retaining bolt passage opening 48 and into the centering contour 205 designed as a centering mount.

[0185] The processing element 302 comprises a support body 310 which can be adjusted, by an actuator 307 in the manner of actuator 207, between a processing position WP shown in dashed lines and a rest position RP shown in solid lines.

[0186] A bearing mount 311 for a bearing 321 of a grinding tool 320, which is mounted on the support body 310 so as to be rotatable about an axis of rotation RO, is arranged on the support body 310. The grinding tool 320 can be driven in rotation about the axis of rotation RO by a rotary drive 322, so that a grinding contour 303, which is opposite the support element 301 or the counter-bearing contour 304, can grind the depression 52 into the retaining wall element 41B. Like the embossing contour 203, the grinding contour 303 is adapted to the contour of the recess 52 to be produced.

[0187] An exemplary embodiment shown in FIG. 16 as a variant of the exemplary embodiment in FIG. 3 of a disc tool 10D can provide, for example, that a retaining wall element 41D in the manner of retaining wall element 41A is present in order to retain the adhesive layer cushion element 61 on the carrier 20. In contrast to the exemplary embodiment according to FIG. 3, however, it is provided that the retaining wall element 41D is screwed directly onto the carrier 20, i.e., in contrast to the exemplary embodiment according to FIG. 3, there is no cushion element 40A and no connecting wall element 42. However, it is also possible for the retaining wall element 41D and the connecting wall element 42 (not shown) to be present, but not the cushion element 40A.

TABLE-US-00001 10 Disc tool ABC 60 Adhesive layer element ABC 11 Tool mount 61 Adhesive layer cushion element 12 Flow-passage channels 62 Intermediate wall element 13 Inflow openings 63 Adhesive layer wall A, C 14 Outflow openings 64 Adhesive layer composite element 15 65 Flow-passage channels for 12 16 66 Passage opening 17 67 Passage opening 18 68 Passage opening 19 69 Displacement cavity 20 Carrier 70 Processing means 21 Mounting surface 71 Abrasive sheet 22 Wall surface 72 Mounting side 23 Inflow openings 73 Processing side 24 Outer circumference 74 25 Mount for 30 75 Flow-passage channels for 12 26 Insertion opening base 26A 76 27 Retaining mounts for 32 77 28 Retaining mounts for 35 78 29 Screw mounts screw thread 29A 79 30 Tool-mounting element 80 Processing machine 31 Base body 81 Housing 32 Fastening arms 82 Handle 33 Cover 83 Drive motor 34 Base body 84 Gear 35 Retaining bolts 85 Output 36 Bolt section screw thread 36A 86 Extraction housing 37 Bolt heads 87 Extraction connection 38 Actuating contour slots 88 39 89 40 Cushion elements ABC 90 41 Retaining wall element ABCD 91 42 Connecting wall element 92 43 Composite element ABC 93 44 Outer circumference 94 45 Flow-passage channels for 12 95 46 96 47 97 48 Retaining bolt passage openings 98 49 Slots 99 50 Adhesive layer W Workpiece 51 Velcro hook MS Machine side 52 Recesses BS Processing side 53 Retaining bolt passage openings DA Axis 54 BL Bolt longitudinal axis