CN112118937A

CN112118937A - Holder body for a grinding tool and method for producing a holder body

Info

Publication number: CN112118937A
Application number: CN201980032128.7A
Authority: CN
Inventors: K·梅罗弗
Original assignee: Tyrolit-Schleifmittelwerke Swarovski KG
Current assignee: Tyrolit-Schleifmittelwerke Swarovski KG
Priority date: 2018-06-07
Filing date: 2019-04-30
Publication date: 2020-12-22
Also published as: US20210031332A1; MX2020013151A; AT521162B1; EP3755500A1; CA3097300A1; BR112020020727A2; WO2019232559A1; CA3097300C; AT521162A4

Abstract

The invention relates to a carrier body (1) for a grinding tool (2), comprising a carrier surface (3) for a preferably peripheral side of a grinding pad (5) having an abrasive material (4), in particular a superabrasive material, wherein the carrier body (1) is essentially made of an abrasive-free composite material (6) consisting of a plurality of layers (7) of a natural fiber material arranged one on top of the other, which are connected to one another by means of a plastic (8), preferably a phenolic resin, preferably wherein the natural fiber material is cotton fabric or paper, wherein the carrier body (1) comprises a preferably cylindrical or hollow-cylindrical first body (29, 30, 31, 32, 33) and at least one further preferably cylindrical or hollow-cylindrical body (29, 30, 31, 32, 33), wherein the respective body (29, 30, 31, 32, 33) comprises a first body (29, 30, 31, 32, 33) which is preferably cylindrical or hollow-cylindrical, wherein the respective body (29, 30, 31, 32, 33) is formed from a, 33) Are connected, preferably adhesively bonded, to each other.

Description

Holder body for a grinding tool and method for producing a holder body

Technical Field

The invention relates to a carrier body for a grinding tool, comprising such a carrier body and a grinding insert with an abrasive, in particular a superabrasive, which is arranged on a preferably circumferential carrier surface of the carrier body, preferably wherein the grinding insert is formed by a continuous grinding ring or individual grinding segments, as well as to a grinding tool. The invention also relates to a method for producing a carrier body according to the preamble of claim 11 and to a method for producing a grinding tool having such a carrier body.

Background

The holder body for the grinding tool should be as stable, lightweight and vibration-damping as possible, in particular in so-called centreless grinding tools (centrerless-schleifferkzeug).

It is known from the prior art to produce support bodies from phenol moulding compounds by hot pressing and hardening. A mixture of synthetic resin, filler and superabrasive is then hot pressed onto the carrier body or a ceramic superabrasive backing is bonded to the carrier body. The support body produced in this way is lightweight and damps vibrations during grinding, so that the wear of the lining is reduced and the surface quality of the ground component is improved, which is manifested by a lower roughness, a lower chipping and the disappearance of the wiping marks, compared to the case of linings with aluminum supports, for example, in grinding use.

However, the stent body has disadvantages in that relatively large uncontrolled waste is generated when manufacturing the stent body, and only a limited variety of stent bodies can be manufactured in terms of size. Furthermore, the formation of cracks occurs during grinding use. The maximum working maximum speed is limited to about 63 m/s.

From US2,069,116, an abrasive tool is known with a holder body which consists of a layer of fibrous layer material. The grinding tool is produced together with the carrier body in a press having defined dimensions, wherein the individual layers of the layer material must be introduced into the press in succession. The manufacturing process is very time consuming. Furthermore, only grinding tools of a certain size can be produced with the aid of the press, so that it is not possible to produce grinding tools of different sizes.

Furthermore, it is known from the prior art to produce the support body from carbon fiber-reinforced plastic. Such a material enables a lighter and at the same time dimensionally stable stent body. However, this is associated with very expensive production and very high manufacturing costs.

Disclosure of Invention

The object of the present invention is to eliminate the disadvantages of the prior art at least in part and to provide a holder body which is improved in comparison thereto and is lighter, and a grinding tool having such a holder body. Another object is to provide a method for producing a carrier body or a grinding tool having a carrier body, wherein the method is characterized in particular by the possibility of producing carrier bodies or grinding tools having different dimensions in a flexible manner, to be precise in a short time and at reasonable production costs.

This object is achieved by the features of the

independent claims

1, 10, 11 and 16.

The carrier body is essentially made of an abrasive-free composite material consisting of a plurality of layers of natural fiber material arranged one above the other, which are connected to one another by plastic, preferably phenolic resin.

In connection with the present invention, an abrasive is understood to be a hard material particle for achieving material degradation. In this context, natural particulate materials (flint, quartz, corundum, carborundum, garnet, natural diamond) and synthetic particulate materials (corundum, silicon carbide, chromium oxide, cubic boron nitride, diamond) are distinguished.

Those skilled in the art understand that superabrasives are diamond and cubic boron nitride.

If no abrasives or superabrasives are present in the material, they are configured to be abrasive-free in the sense of the present invention.

Abrasive-free composite materials consisting of a plurality of layers of natural fiber material arranged on top of one another, which are connected to one another by plastics, preferably phenolic resins, wherein the natural fiber material is a cotton fabric or paper, are known in the technical field of electrical and thermal insulation components for machine and device manufacture as cotton fabrics and in the case of paper as hard paper.

Compared to the support bodies known from the prior art made of phenol molding compound, the support body according to the invention has a bending breaking stress of approximately 30% higher, a tensile elongation of approximately three times greater and a high elasticity, and is approximately 15% lighter. Higher speeds of use are possible, for example 125m/s or more.

Furthermore, no waste or a significantly reduced waste is produced in the production of the carrier body or of a grinding tool having such a carrier body.

If a grinding pad mixture for producing a grinding ring is pressed onto the carrier body, less pressure is required for this purpose during pressing. The grinding tool is significantly easier to form because the stent body does not expand after hot pressing. Pressing without a flange is also simpler, whereby a potential saving is subsequently obtained in cutting.

The use of composite materials also enables the fabrication of stent bodies in a wide range of sizes. Thus, stent bodies, for example, up to 1050mm diameter and 100mm height, can be easily manufactured.

Furthermore, the composite material has the advantage that it can be more easily cut with cemented carbide (or hard metal). In contrast, expensive tools with PCD cutting edges must often be used to machine the materials used in the prior art. Furthermore, the composite material can be combined very well with other materials (for example CFK, GFK, AI or steel), for example by gluing or screwing.

Advantageously, the composite material used in the present invention is thermosetting, i.e. it can no longer be deformed after it has hardened.

Since the carrier body comprises a preferably cylindrical or hollow-cylindrical first body and at least one further preferably cylindrical or hollow-cylindrical body, wherein the bodies are connected to one another, preferably adhesively bonded, a lightweight carrier body having a complex shape can be constructed in a flexible manner, as it is possible in the prior art to achieve only with carbon fiber reinforced plastics, but in a significantly shorter time and at a significantly lower cost.

According to an advantageous embodiment, the natural fiber material is cotton fabric or paper.

It has proven advantageous in terms of its physical properties that the composite material has a density of 1.0 to 2.0g/cm³Preferably 1.4g/cm³A density (e.g. measured according to test standard ISO 1183) and/or a water absorption (e.g. measured according to test standard ISO 62) of 1.5 to 7.5%, preferably 2.4% or 5.2%.

It has proven advantageous in terms of thermal properties for the composite material to have a thickness of 20 to 40X 10^-6K^-1Preferably 30X 10^-6K^-1And/or a thermal conductivity of 0.1 to 0.3W/mK, preferably 0.2W/mK (measured for example according to test standard DIN 52612).

The application temperature may be 110 ℃ or 180 ℃ continuously or for a short time.

It is proposed in terms of mechanical properties that the composite material has a viscosity of 200 to 400N/mm at 23 DEG C²Preferably 300N/mm²Or 320N/mm²Has a compressive strength of (e.g. measured according to test standard ISO 604) and/or has a tensile strength of 50 to 150N/mm at 23 ℃²Preferably 100N/mm²Or 135N/mm²Bending strength (measured for example according to test standard ISO 178) and/or 6000 to 8000N/mm²Preferably 7000N/mm²And/or an elastic modulus of 50 to 150N/mm (measured for example according to test standard ISO 178)²Preferably 80N/mm²Or 120N/mm²Tensile strength (e.g. measured according to test standard ISO 527) and/or a splitting force of 1500 to 3500N, preferably 1900N or 3000N (e.g. measured according to test standard DIN 53463).

In terms of electrical properties, the composite material may have a creepage strength CTI100 (measured, for example, according to test standard IEC 112), and/or a (vertical) electrical breakdown strength of 1.5KV/3mm or 10KV/3mm (measured, for example, according to test standard IEC 243-1) and/or a (parallel) electrical breakdown strength of 1.0KV/25mm or 10KV/25mm (measured, for example, according to test standard IEC 243-1).

According to a preferred embodiment of the invention, the carrier body has at least one side surface which is separate from the carrier surface for the grinding pad and on which a layer of natural fiber material is arranged in a planar manner.

It is furthermore proposed that the holder body comprises a central coupling region for connection to a rotary drive, which preferably has a central bore, for rotating the holder body or a grinding tool formed therewith about a rotational axis extending through the coupling region, and/or that the holder body is formed substantially rotationally symmetrically.

It has proven to be advantageous if the first body and the at least one further body are cylindrical or hollow-cylindrical bodies which are connected to one another laterally, preferably wherein the axes of symmetry of the bodies substantially coincide. The carrier body or the grinding tool which can be realized in this way is particularly well suited for grinding camshafts, for example.

Furthermore, it has proven to be advantageous if the holder body has an adapter for connecting the holder body or a grinding tool formed therewith to a rotary drive which is connected, preferably adhesively bonded, to at least one of the bodies, preferably wherein the adapter is substantially made of metal and/or is substantially hollow-cylindrical in shape.

In this connection, it is provided that the carrier body has a central bore and the adapter is arranged at least partially in the central bore, preferably wherein the adapter extends only over part of the length of the central bore, particularly preferably wherein the central bore has a funnel-shaped introduction opening. The funnel-shaped insertion opening facilitates the clamping of the stent body.

A grinding tool is also claimed, which comprises a carrier body according to the invention and a grinding pad with an abrasive, in particular a superabrasive, which is arranged on a preferably circumferential carrier surface of the carrier body, preferably wherein the grinding pad is formed by a continuous grinding ring or individual grinding segments.

Furthermore, a method for producing a carrier body for a grinding tool is claimed, wherein the carrier body comprises a carrier surface for a preferably circumferential side of a grinding pad having an abrasive, in particular a superabrasive, and is essentially made of an abrasive-free composite material consisting of a plurality of layers of natural fiber material arranged one above the other, which are connected to one another by plastic, preferably phenolic resin, preferably wherein the natural fiber material is cotton fabric or paper, wherein the abrasive-free composite material is provided in the form of a plate in a first method step, and in a second method step the preferably cylindrical or hollow-cylindrical body is separated from the plate in a predetermined size, preferably by water jet cutting or by means of a band saw (or band saw machine).

According to an advantageous embodiment, at least one further, preferably cylindrical or hollow-cylindrical body is detached from the plate to a predetermined size during the second method step and is connected to the first body, preferably by adhesive bonding.

In this connection, it is provided that the first body and the at least one further body are cylindrical or hollow-cylindrical bodies which are connected to one another laterally, preferably wherein the axes of symmetry of the respective bodies substantially coincide with one another.

It has proven to be advantageous if, in a third method step, the body or the bodies are reworked, preferably by machining and/or balancing and/or by installing a central bore.

It has proven to be advantageous if at least one of the bodies is connected in a further method step following the second or third method step to an adapter for connecting the holder body or a grinding tool formed therewith to the rotary drive, preferably by adhesive bonding, preferably wherein the adapter is substantially made of metal and/or is substantially hollow-cylindrical.

Furthermore, a method for producing a grinding tool is claimed, which comprises a carrier body which comprises a carrier surface for a preferably circumferential side of a grinding insert having an abrasive, in particular a superabrasive, and which is essentially made of an abrasive-free composite material consisting of a plurality of layers of natural fiber material arranged one above the other, which are connected to one another by plastic, preferably phenolic resin, preferably wherein the natural fiber material is cotton fabric or paper, and which comprises a grinding insert having an abrasive, in particular a superabrasive, which is arranged on a preferably circumferential side of a carrier body, preferably wherein the grinding insert consists of a continuous grinding ring or individual grinding segments, wherein the carrier body which is preferably produced by means of the method for producing a carrier body is first provided and then the carrier body with the abrasive, The grinding linings, preferably superabrasive, are preferably arranged on the preferably circumferential support surface of the support body by pressing and/or bonding, preferably wherein the grinding linings are formed by a continuous grinding ring or individual grinding segments.

Drawings

Further details and advantages of the invention are explained in more detail below with reference to the drawing description. Wherein:

figure 1a) shows a support body in a schematic side view,

figure 1b) shows the stent body according to figure 1a in a schematic cross-sectional view along a section plane 24,

figure 2 shows a grinding tool according to a first preferred embodiment in a schematic side view,

figure 3a) shows a photograph of a grinding tool according to a second preferred embodiment in a side view,

figure 3b) shows a photomicrograph of a cross-section of a composite material used in a grinding tool according to a second preferred embodiment,

figures 4a), 4b) show photomicrographs of another preferably used composite material on the side (figure 4a)) and in cross section,

fig. 5 shows a schematic representation of a method for producing a carrier body or a grinding tool by means of a flow chart, and

fig. 6a), 6b) show a further grinding tool in a schematically illustrated perspective view (partial view a)) and in a schematically illustrated cross-sectional view (partial view b)).

Detailed Description

Fig. 1a) and 1b) show a carrier body 1 (see also fig. 2) for a grinding tool 2, which is substantially rotationally symmetrical and comprises a carrier surface 3 for the peripheral side of a grinding pad 5 having an abrasive 4, preferably a superabrasive.

The stent body 1 is essentially made of an abrasive-free composite material 6 consisting of a plurality of layers 7 of natural fiber material arranged one above the other, which are connected to one another by means of a plastic material 8. This is schematically shown in the enlarged part of fig. 1 b). The plastic 8 may be a hardened synthetic resin, preferably a phenolic resin.

Directly adjacent layers 7 can have a very small distance from one another and even be in at least partial contact. These layers 7 are oriented substantially parallel to the side faces.

As regards the composite material 6, two embodiments have proved particularly advantageous:

in a first embodiment, the natural fiber material is a cotton fabric. In this case, the composite material 6 has a density of 1.4g/cm³Density and 2.4% water absorption. Furthermore, the composite material 6 has a size of 30 × 10^-6K^-1Linear expansion coefficient of (a) and thermal conductivity of 0.2W/mK. And finally, the composite material 6 has a viscosity of 320N/mm at 23 DEG C²Compressive strength of 100N/mm at 23 DEG C²Bending strength of 7000N/mm²Elastic modulus of 80N/mm²Tensile strength and a splitting force of 3000N.

In a second embodiment, the natural fiber material is paper. In this case, the composite material 6 has a density of 1.4g/cm³And 5.2% water absorption. Furthermore, the composite material 6 has a size of 30 × 10^-6K^-1Linear expansion coefficient of (a) and thermal conductivity of 0.2W/mK. And finally, the composite material 6 has a thickness of 300N/mm at 23 DEG C²Compressive strength of 135N/mm at 23 DEG C²Bending strength of 7000N/mm²Modulus of elasticity of 120N/mm²Tensile strength and a splitting force of 1900N.

The carrier body 1 has two opposite side faces 9, which are spaced apart from the carrier surface 3 for the grinding pad 5 and on which a layer 7 of a natural fiber material is arranged in each case in a planar manner (see also fig. 3 a)).

The holder body 1 comprises a central coupling region 10 for connection to a rotary drive, which has a central bore 11, for rotating the holder body 1 or a grinding tool 2 formed therewith about a rotational axis 12 extending through the coupling region 10. The axis of rotation 12 extends through the center 25 of the central bore 11 and is oriented substantially perpendicular to the side face 9.

The dimensions of the stent body 1 can be characterized by its diameter 17, its thickness 18 and the diameter 19 of the central hole 11.

The grinding tool 2 shown in fig. 2 comprises a carrier body 1 and a grinding pad 5 with an abrasive 4, in particular a superabrasive, which is arranged on a peripheral carrier surface 3 of the carrier body 1. The abrasive 4 is schematically shown in an enlarged portion. The abrasive 4 is embedded in a binder, such as a ceramic binder.

The grinding insert 5 can be formed by a continuous grinding ring or, as shown in the lower region of the grinding tool 2, by individual grinding segments 13.

In the grinding tool 2 visible in fig. 3a), the carrier body 1 has a side face 9 which is spaced apart from the carrier face 3 for the grinding pad 5, on which side face 9 a layer 7 of a natural fiber material in the form of a cotton fabric is arranged in a planar manner. This is particularly evident from the enlarged view, in which a textile structure is visible which is composed of substantially perpendicularly crossing textile threads with weft threads and warp threads 26.

In order to improve the rotation behavior of the grinding tool 2, the holder body 1 can have a balancing hole 22 and/or a step 23.

Fig. 3b) shows a photomicrograph of a cross section of a composite material used in the grinding tool 2 according to the second preferred embodiment. The layers 7 of the cotton fabric, which are arranged one above the other in the direction of the axis of rotation 12 and are formed by the individual cotton fibers 26, can be seen very well.

Fig. 4a) and 4b) show photomicrographs, more precisely the side (fig. 4a)) and the cross section (fig. 4b)) of another composite material which is preferably used. In this case, the natural fiber material is paper. In fig. 4a) individual paper fibers 27 can be seen, which are randomly oriented within the layer 7. Fig. 4b) shows the structure formed by the layers 7 arranged one above the other.

A particularly preferred embodiment of the method for producing a carrier body and of the method for producing a grinding tool is described with the aid of the flow chart shown in fig. 5.

In a method 14 for producing a stent body 1, in a first method step 15, an abrasive-free composite material 6 is provided in the form of a plate, which consists of a plurality of layers 7 of natural fiber material arranged on top of one another, which are connected to one another by a plastic material 8, preferably a phenolic resin.

In a second method step 16, the body is separated from the plate, preferably by water jet cutting or with the aid of a band saw, in

predetermined dimensions

17, 18, 19 (see fig. 1a) and 1 b)). In the case of the stent body 1 shown in fig. 1, the body is a disc blank.

In a third method step 20, the body is preferably reworked by machining and/or balancing.

The method 14 can be extended to a method 21 for producing a grinding tool 2 by arranging a grinding insert 5 with an abrasive 4, preferably a superabrasive, preferably by pressing and/or gluing, preferably on a preferably circumferential carrier surface 3 of the carrier body 1 in a further method step 28, wherein the grinding insert 5 is preferably formed by a continuous grinding ring or individual grinding segments 13.

The third method step 20 can optionally also be carried out after the grinding insert 5 has been arranged on the carrier surface 3 of the carrier body 1.

Fig. 6a) and 6b) show a grinding tool 2 having a holder body 1, which is formed from five hollow-

cylindrical bodies

29, 30, 31, 32, 33, wherein the

bodies

29, 30, 31, 32, 33 are bonded to one another on a side face 9. The axes of symmetry 12 of the

bodies

29, 30, 31, 32, 33 are substantially coincident. Other numbers of cylindrical or hollow

cylindrical bodies

29, 30, 31, 32, 33 may also be used, depending on the shape of the stent body 1.

The holder body 1 has an adapter 34 for connecting the holder body 1 or a grinding tool 2 formed therewith to a rotary drive which is adhesively bonded to the

bodies

32 and 33. Depending on the rigidity to be achieved of the grinding tool 2, the adapter 34 can also be connected to more than two bodies or only one of these

bodies

29, 30, 31, 32, 33.

The adapter 34 can be made substantially of metal and, as in the case shown, is substantially hollow-cylindrical in shape.

The adapter 34 can, as in the case shown, have holes 37 for receiving fastening means by means of which the adapter 34 can be connected to the machine spindle.

The stent body 1 has a central hole 11. An adapter 34 is arranged in the central bore 11, wherein the adapter 34 extends only over a partial length 35 of the central bore 11. The central bore 11 has a funnel-shaped introduction opening 36.

Grinding linings 5 are respectively arranged on the circumferential sides on the

bodies

29 and 31.

In order to produce the support body 1, it is proposed in a first method step 15 to provide a plate with a thickness 18 and in a second method step 16 to separate three cylindrical or hollow-

cylindrical bodies

30, 32 and 33 from the plate, preferably by water jet cutting or with the aid of a band saw, in

predetermined dimensions

17, 18, 19.

Furthermore, a further plate with a different thickness 18 is provided during the first method step 15 and the two cylindrical or hollow-

cylindrical bodies

29 and 31 are separated from the plate in a

predetermined dimension

17, 18, 19 during the second method step 16, preferably by water jet cutting or by means of a band saw machine.

During the second method step 16, the

bodies

29, 30, 31, 32, 33 are connected to one another on the side 9 after they have been separated from the plate, the axes of symmetry 12 of these

bodies

29, 30, 31, 32, 33 substantially coinciding with one another.

In a third method step 20, the

bodies

29, 30, 31, 32, 33 are reworked by means of a cutting process, in particular in order to provide the central bore 11 with a predetermined size.

In a further method step, the

bodies

32, 33 are connected to the adapter 34.

Claims

1. Holder body (1) for a grinding tool (2), comprising a preferably circumferential holder face (3) for a grinding pad (5) having an abrasive material (4), in particular a superabrasive material, wherein the holder body (1) is essentially made of an abrasive-free composite material (6) consisting of a plurality of layers (7) of a natural fiber material arranged one on top of the other, which are connected to one another by means of a plastic (8), preferably a phenolic resin, preferably wherein the natural fiber material is a cotton fabric or paper, characterized in that the holder body (1) comprises a preferably cylindrical or hollow-cylindrical first body (29, 30, 31, 32, 33) and at least one further preferably cylindrical or hollow-cylindrical body (29, 30, 31, 32, 33), wherein the bodies (29, 30, 31, 32, 33) are connected to one another, Preferably adhered to each other.

2. The stent body (1) according to claim 1, wherein the composite material (6) has 1.0 to 2.0g/cm³Preferably 1.4g/cm³And/or a water absorption of 1.5% to 7.5%, preferably 2.4% or 5.2%.

3. Stent body (1) according to claim 1 or 2, wherein the composite material (6) has a thickness of 20 to 40 x 10^-6K^-1Preferably 30X 10^-6K^-1And/or a thermal conductivity of 0.1 to 0.3W/mK, preferably 0.2W/mK.

4. Stent body (1) according to any one of claims 1 to 3 wherein the composite material (6) has a temperature of from 200 to 400N/mm at 23 ℃²Preferably 300N/mm²Or 320N/mm²And/or a compressive strength of 50 to 150N/mm at 23 DEG C²Preferably 100N/mm²Or 135N/mm²And/or a bending strength of 6000 to 8000N/mm²Preferably 7000N/mm²Bullet ofA modulus of elasticity, and/or 50 to 150N/mm²Preferably 80N/mm²Or 120N/mm²And/or a splitting force of 1500 to 3500N, preferably 1900N or 3000N.

5. The carrier body (1) according to any one of claims 1 to 4, wherein the carrier body (1) has at least one side (9) which is separate from the carrier surface (3) for the grinding pad (5) and on which a layer (7) of natural fiber material is arranged in a planar manner.

6. Stent body (1) according to one of claims 1 to 5, wherein the stent body (1) comprises a central coupling region (10) for connection to a rotary drive, preferably with a central bore (11), for rotating the stent body (1) or a grinding tool (2) formed therewith about a rotational axis (12) extending through the coupling region (10) and/or the stent body (1) is substantially rotationally symmetrical.

7. Stent body (1) according to any one of claims 1 to 6 wherein the first body and the at least one further body (29, 30, 31, 32, 33) are cylindrical or hollow cylindrical bodies, which bodies are connected to each other on a side face (9), preferably wherein the symmetry axes (12) of the respective bodies (29, 30, 31, 32, 33) substantially coincide.

8. Support body (1) according to one of claims 1 to 7, wherein the support body (1) has an adapter (34) for connecting the support body (1) or a grinding tool (2) formed therefrom to a rotary drive which is connected, preferably adhesively bonded, to at least one of the bodies (29, 30, 31, 32, 33), preferably wherein the adapter (34) is substantially made of metal and/or is substantially of hollow-cylindrical design.

9. Stent body (1) according to claim 8 wherein the stent body (1) has a central bore (11) and the adapter (34) is at least partially arranged in the central bore (11), preferably wherein the adapter (34) extends only over a partial length (35) of the central bore (11), particularly preferably wherein the central bore (11) has a funnel-shaped lead-in opening (36).

10. Grinding tool (2) comprising a carrier body (1) according to one of the preceding claims and a grinding insert (5) with an abrasive (4), in particular a superabrasive, which is arranged on a preferably circumferential carrier surface (3) of the carrier body (1), preferably wherein the grinding insert (5) is formed by a continuous grinding ring or individual grinding segments (13).

11. Method (14) for producing a carrier body (1) for a grinding tool (2), wherein the carrier body (1) comprises a preferably circumferential carrier surface (3) for a grinding pad (5) having an abrasive (4), in particular a superabrasive, and is essentially made of an abrasive-free composite material (6) consisting of a plurality of layers (7) of natural fiber material arranged one on top of the other, which are connected to one another by means of a plastic (8), preferably a phenolic resin, preferably wherein the natural fiber material is cotton fabric or paper, characterized in that the abrasive-free composite material (6) is provided in the form of a plate in a first method step (15), and in that in a second method step (16) a preferably cylindrical or hollow-cylindrical body (29, 30, 31, 32, 33) is cut, preferably by means of a water jet or by means of a band saw, in predetermined dimensions (17, 30, 33), 18. 19) are separated from the plate.

12. Method (14) according to claim 11, wherein during a second method step (16) at least one further, preferably cylindrical or hollow-cylindrical body (29, 30, 31, 32, 33) is separated from the plate in a predetermined dimension (17, 18, 19) and is connected to the first body (29, 30, 31, 32, 33), preferably by gluing.

13. Method (14) according to claim 12, wherein the first body and the at least one further body (29, 30, 31, 32, 33) are cylindrical or hollow-cylindrical bodies connected to each other on a side face (9), preferably wherein the symmetry axes (12) of the bodies (29, 30, 31, 32, 33) substantially coincide with each other.

14. Method (14) according to one of claims 11 to 13, wherein in a third method step (20) one or more of the bodies (29, 30, 31, 32, 33) are reworked, preferably by machining and/or balancing and/or by installing a central bore (11).

15. Method (14) according to one of claims 11 to 14, wherein at least one of the bodies (29, 30, 31, 32, 33) is connected in a further method step following the second method step (16) or the third method step (20) to an adapter (34) for connecting the holder body (1) or a grinding tool (2) formed therewith to a rotary drive, preferably by adhesive bonding, preferably wherein the adapter (34) is substantially made of metal and/or is substantially hollow-cylindrically formed.

16. Method (21) for producing a grinding tool (2) comprising a carrier body (1) which comprises a carrier surface (3) for a preferably circumferential side of a grinding pad (5) having an abrasive (4), in particular a superabrasive, and which is essentially made of an abrasive-free composite material (6) consisting of a plurality of layers (7) of natural fiber material arranged one on top of the other, which are connected to one another by means of a plastic (8), in particular a phenolic resin, preferably the natural fiber material being cotton fabric or paper, and comprising a grinding pad (5) having an abrasive (4), in particular a superabrasive, which is arranged on a preferably circumferential side of a carrier body (1) on the carrier surface (3), preferably wherein the grinding pad (5) consists of a continuous grinding ring or individual grinding segments (13), wherein, firstly, a carrier body (1) is provided, preferably produced by means of a method (14) according to any one of claims 11 to 15, and then a grinding insert (5) having an abrasive material (4), preferably a superabrasive material, is arranged on a preferably circumferential carrier surface (3) of the carrier body (1), preferably by pressing and/or gluing, preferably wherein the grinding insert (5) is formed by a continuous grinding ring or individual grinding segments (13).