ES3004457T3 - Supporting body for a grinding tool and method for producing a supporting body - Google Patents

Description

DESCRIPTION

Support body for an abrasive tool and method for manufacturing a support body

The invention relates to a support body for an abrasive tool according to the preamble of claim 1, as well as to an abrasive tool with said support body and an abrasive coating, which has abrasive media, in particular superabrasive media, which is arranged on a support surface, preferably on the circumferential side, of the support body, whereby the abrasive coating is preferably formed by a continuous slip ring or by individual abrasive segments. The invention further relates to a method for producing a support body according to the preamble of claim 11, as well as to a method for producing an abrasive tool with said support body.

Support bodies for abrasive tools should be designed to be as stable, lightweight and shock-absorbing as possible, particularly in the case of so-called centerless abrasive tools.

The prior art provides the production of support bodies from a phenolic molding compound by hot pressing and curing. Mixtures of synthetic resin, fillers, and superabrasive media are then hot-pressed onto these supports, or linings of ceramic superabrasive media are bonded. A support body produced in this manner is lightweight and dampens vibrations during the grinding process. Compared to, for example, linings with aluminum supports during grinding, wear on the linings is reduced and the surface quality of the ground components is improved, resulting in lower roughness, fewer breakages, and the absence of scraper marks.

However, the disadvantage of these support bodies is that a relatively large amount of uncontrolled waste is generated during support manufacturing, and only a limited range of support bodies can be manufactured in terms of dimensions. Furthermore, cracks can form in the grinding workpiece. The maximum working speed is limited to approximately 63 m/s.

From US Pat. No. 2,069,11612, which forms the basis of the preambles of claims 1 and 11, a grinding tool is known with a support body formed from layers of a fibrous laminated material. The grinding tool is manufactured together with the support body in a press of fixed dimensions, whereby the individual layers of the laminated material must be introduced one after the other into the press. This manufacturing method is very time-consuming. Furthermore, only grinding tools with specified dimensions can be manufactured with the press, whereby it is not possible to produce a grinding tool with different dimensions.

The production of support bodies from carbon fiber-reinforced plastic is also known from the state of the art. This material allows for the creation of lightweight yet dimensionally stable support bodies. However, this entails very complex manufacturing and very high manufacturing costs.

Document US 2015/004891 A1 and document US 2069 116 A represent a general state of the art.

The objective of the present invention is to eliminate, at least partially, the disadvantages of the prior art and to provide a comparatively improved and lighter support body and an abrasive tool with such a support body. A further objective is to provide a method for manufacturing a support body or an abrasive tool with a support body, whereby the method is characterized in that support bodies or abrasive tools with different dimensions can be manufactured flexibly, i.e., in a short time and at reasonable production costs.

These objectives are solved by the features of independent claims 1, 10, 11 and 15.

The support body is essentially composed of an abrasive-free composite material, consisting of a large number of layers arranged one on top of the other, of a natural fiber material, which are joined together by means of plastic, preferably phenolic resin.

In the context of the present invention, abrasive media are understood to mean hard material grains with which material removal is achieved. A distinction is made here between natural grain materials (flint, quartz, corundum, emery, shot, natural diamond) and synthetic grain materials (corundum, silicon carbides, chromium oxides, cubic boron nitride, diamonds).

A person skilled in the art understands super abrasive media as diamond and cubic boron nitride.

If a material does not contain abrasive or super abrasive media, these are designed to be free of abrasive media within the meaning of the present invention.

Abrasive-free composite materials, consisting of a large number of layers of natural fiber material arranged one on top of the other and bonded together by means of plastic, preferably phenolic resin, the natural fiber material being a cotton fabric or paper, originate from the technical field of the production of electrically and thermally insulating components for machine and plant construction, in the case of cotton fabric as hard cotton fabric and in the case of paper as hard paper.

Compared to the support bodies made of phenolic molding composition known in the prior art, the support body according to the invention has approximately 30% higher flexural tensile strength, approximately three times greater elongation at break, and greater elasticity, and is approximately 15% lighter. Higher operating speeds are possible, for example, of 125 m/s and more.

Furthermore, in the production of the support body or an abrasive tool with such a support body, no waste is produced or is significantly reduced.

If an abrasive coating mixture is pressed onto the support body to create a slip ring, less pressure is required during pressing. The abrasive tool is much easier to shape because the support body does not expand after hot pressing. It is also easier to press without a collar, which subsequently translates into potential savings in machining.

Using composite materials also makes it possible to manufacture support bodies in a wider range of dimensions. For example, support bodies with a diameter of up to 1050 mm and a height of 100 mm can be easily manufactured.

Composite material also has the advantage of being easier to machine with carbide. In comparison, processing the materials used in the prior art typically requires expensive tools with PCD cutting edges. Furthermore, composite material can be easily combined with other materials, such as CFRP, GRP, Al, or steel, for example, by gluing or screwing.

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

Because the support body comprises a first, preferably cylindrical or hollow-cylindrical body and at least one further, preferably cylindrical or hollow-cylindrical body, the bodies being glued together, lightweight support bodies with complex shapes can be flexibly constructed, as was then only possible in the prior art using carbon-fibre-reinforced plastic, but in much less time and at significantly lower costs.

According to advantageous embodiments, the natural fiber material is a cotton fabric or paper.

As regards its physical properties, it has proven to be advantageous if the composite material has a density of 1.0 to 2.0 g/cm3, preferably 1.4 g/cm3, (for example, measured according to the ISO 1183 test standard) and/or a water absorption of 1.5 to 7.5%, preferably 2.4% or 5.2%, (for example, measured according to the ISO 62 test standard).

As regards thermal properties, it has been found to be advantageous if the composite material has a coefficient of length expansion of 20 to 40x10'6 K-1, preferably 30x10'6 K-1, (e.g. measured according to test standard DIN 51045) and/or a thermal conductivity of 0.1 to 0.3 W/mK, preferably 0.2 W/mK (e.g. measured according to test standard DIN 52612).

The application temperature can be 110°C or 180°C, permanently or briefly.

As regards the mechanical properties, it is recommended that the composite material has a compressive strength at 23°C of 200 to 400 N/mm2 , preferably 300 N/mm2 or 320 N/mm2 , (e.g. measured according to test standard ISO 604) and/or a flexural strength at 23°C of 50 to 150 N/mm2 , preferably 100 N/mm2 or 135 N/mm2 , (e.g. measured according to test standard ISO 178) and/or an elastic modulus (from a bending test) of 6000 to 8000 N/mm2 , preferably 7000 N/mm2 , (e.g. measured according to test standard ISO 178) and/or a tensile strength of 50 to 150 N/mm2 , preferably 80 N/mm2 or 120 N/mm2 , (e.g. measured according to test standard ISO 178). example, measured according to test standard ISO 527) and/or a shear force of 1500 to 3500 N, preferably 1900 N or 3000 N, (e.g., measured according to test standard DIN 53463).

With regard to electrical properties, the composite material may have a CTI 100 continuity resistance (e.g. measured according to IEC 112 test standard) and/or an electrical dielectric strength (vertical) of 1.5 KV/3 mm or 10 KV/3 mm (e.g. measured according to IEC 243-1 test standard) and/or an electrical dielectric strength (parallel) of 1.0 KV/25 mm or 10 KV/25 mm (e.g. measured according to IEC 243-1 test standard).

According to a preferred embodiment of the invention, the support body has at least one side surface separated from the support surface for the abrasive coating, on which a layer of the composite material is arranged planarly.

Furthermore, it is advisable that the support body has a central coupling region, preferably with a central bore, for connection to a rotary drive for rotating the support body or an abrasive tool formed therewith, around a rotation axis extending through the coupling region, and/or that the support body is designed to be substantially rotationally symmetrical.

It has proven advantageous for the first body and at least one further body to be cylindrical or hollow cylindrical bodies connected to one another at lateral surfaces, so that the axes of symmetry of the bodies are preferably substantially congruent. Support bodies or grinding tools produced in this way are particularly suitable, for example, for grinding camshafts.

Furthermore, it has been shown to be advantageous if the support body has an adapter for connecting the support body or an abrasive tool formed therewith, with a rotary drive, which is connected, preferably glued, to at least one of the bodies, whereby the adapter preferably consists essentially of a metal and/or is essentially hollow cylindrical.

In this context, it is advisable for the support body to have a central bore and for the adapter to be arranged at least partially in the central bore, preferably with the adapter extending only along part of the central bore. Therefore, the central bore particularly preferably has a funnel-shaped insertion opening. A funnel-shaped insertion opening facilitates the clamping of the support body.

Protection is also claimed for an abrasive tool with a support body according to the invention and an abrasive coating comprising abrasive media, in particular super abrasive media, which is arranged on the support surface, preferably on the circumferential side, of the support body, whereby the abrasive coating is preferably formed by a continuous slip ring or by individual abrasive segments.

Furthermore, protection is sought for a method for producing a support body for an abrasive tool, wherein the support body comprises an abrasive coating, preferably on the circumferential side, which has a support surface for abrasive media, in particular superabrasive media, and which consists essentially of an abrasive-media-free composite material formed by a large number of layers of a natural fiber material arranged one on top of the other, which are bonded to one another by means of plastic, preferably phenolic resin, whereby the natural fiber material is preferably a cotton or paper fabric, whereby the abrasive-media-free composite material is provided in a first method step in the form of a plate, and in a second method step a body, preferably cylindrical or hollow cylindrical, with predetermined dimensions is separated from the plate, preferably by water jet cutting or by means of a band saw, whereby in the course of the second method step at least one further body, preferably cylindrical or hollow cylindrical, with predetermined dimensions is separated from the plate, and is connected to the first body by an adhesive joint.

In this context, it is advisable that the first body and at least one additional body be cylindrical or hollow cylindrical bodies, which are connected to each other on lateral surfaces, preferably with the axes of symmetry of the bodies essentially congruent to each other.

It has proven advantageous to further process the body or bodies in a third step of the method, preferably by machining and/or balancing and/or drilling a center hole.

It has proven to be favorable that at least one of the bodies in a further method step, which follows the second method step or the third method step, is connected to an adapter for connecting, preferably by gluing, the support body or an abrasive tool formed therewith, to a rotary drive, whereby the adapter preferably consists essentially of one material, and/or is essentially hollow cylindrical.

Furthermore, protection is sought for a method for manufacturing an abrasive tool with a support body, comprising an abrasive lining, preferably on the circumferential side, which has a support surface for abrasive media, in particular super abrasive media, and is essentially composed of a composite material, free of abrasive media, formed by a large number of layers of a natural fiber material arranged one on top of the other, which are connected to each other by means of plastic, preferably phenolic resin, whereby preferably the natural fiber material is a cotton or paper fabric, and an abrasive lining having abrasive media, in particular super abrasive media, which is arranged on the support surface, preferably on the circumferential side, of the support body, whereby preferably the abrasive lining is formed from a continuous slip ring or from individual abrasive segments, in which first a support body is provided by the method according to the invention, for manufacturing the support body, and then an abrasive lining is arranged, which has abrasive media, abrasives, preferably super abrasive media, on a support surface, preferably on the circumferential side, of the support body, preferably by pressing and/or by adhesive bonding, whereby the abrasive lining is preferably formed from a continuous slip ring or from individual abrasive segments.

Other details and advantages of the invention are explained in more detail below based on the description of the figures with reference to the drawings. They are shown in:

Figure 1a), a support body in a schematic side view,

Figure 1b), the support body according to Figure 1a in a schematic cross-sectional view, along the section plane 24,

Figure 2 shows a schematic side view of an abrasive tool according to a first preferred embodiment,

Figure 3a), a photograph of an abrasive tool according to a second preferred embodiment in a side view,

Figure 3b), a microscopic image of a cross-sectional surface of the composite material used in the abrasive tool, according to the second preferred embodiment,

Figures 4a), b), microscopic images of another preferred composite material of a lateral surface (Figure 4a) and a cross-sectional surface,

Figure 5, a method for manufacturing a support body or an abrasive tool in a schematic representation, using a flow diagram, and

Figures 6a), b), another abrasive tool in a schematically represented perspective view (partial figure a) and in a schematically represented cross-sectional view (partial figure b).

Figures 1a) and 1b) show a support body 1 for an abrasive tool 2 (compare also with Figure 2), which is designed essentially rotationally symmetrical and comprises a support surface on the circumferential side 3 for an abrasive coating 5, which has abrasive media 4, in particular super abrasive media.

The support body 1 consists essentially of an abrasive-free composite material 6, formed by a large number of layers 7 arranged one on top of the other of a natural fiber material, which are connected to one another by means of plastic 8. This is indicated schematically in the enlarged section of Figure 1b). The plastic 8 can be a hardened synthetic resin, preferably phenolic resin.

The immediately adjacent layers 7 may be very close together and, at least in some areas, may even touch each other. The layers 7 are aligned essentially parallel to the lateral surfaces.

Two embodiments have proven to be particularly advantageous in connection with the composite material 6:

In the first embodiment, the natural fiber material is a cotton fabric. In this case, the composite material 6 has a density of 1.4 g/cm3 and a water absorption of 2.4%. Furthermore, the composite material 6 has a coefficient of longitudinal expansion of 30x10'6 K'1 and a thermal conductivity of 0.2 W/mK. Finally, the composite material 6 has a compressive strength at 23°C of 320 N/mm2, a flexural strength at 23°C of 100 N/mm2, an elastic modulus of 7000 N/mm2, a tensile strength of 80 N/mm2, and a shear force of 3000 N.

In the second embodiment, the natural fiber material is paper. In this case, the composite material 6 has a density of 1.4 g/cm3 and a water absorption of 5.2%. Furthermore, the composite material 6 has a coefficient of longitudinal expansion of 30x10'6 K'1 and a thermal conductivity of 0.2 W/mK. Finally, the composite material 6 has a compressive strength at 23°C of 300 N/mm2, a flexural strength at 23°C of 135 N/mm2, an elastic modulus of 7000 N/mm2, a tensile strength of 120 N/mm2, and a shear force of 1900 N.

The support body 1 has two opposite side surfaces 9, separated from the support surface 3 for the abrasive coating 5, on which a layer 7 of the natural fiber material is arranged flat (compare also with Figure 3a)).

The support body 1 comprises a central coupling region 10 with a central bore 11 for connection to a rotary drive for rotating the support body 1 or an abrasive tool 2 formed therewith, around a rotation axis 12, which extends through the coupling region 10. The rotation axis 12 extends through the center 25 of the central bore 11 and is aligned substantially normal to the side surfaces 9.

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

The grinding tool 2 shown in Figure 2 comprises a support body 1 and an abrasive coating 5, which has abrasive media 4, in particular super abrasive media, which is arranged on the support surface 3, preferably on the circumferential side, of the support body 1. The abrasive medium 4 is schematically indicated in the enlarged section. The abrasive medium 4 is embedded in a bond, for example a ceramic bond.

The abrasive lining 5 can be formed by a continuous slip ring or, as indicated in the lower area of the abrasive tool 2, by individual abrasive segments 13.

In the grinding tool 2 shown in Figure 3a), the support body 1 has a side surface 9 separated from the support surface 3 for the abrasive coating 5, on which a layer 7 of a natural fiber material in the form of a cotton fabric is arranged planarly. This is particularly evident in the enlarged view, in which the fabric structure formed by fabric threads, which intersect essentially perpendicularly with warp and weft threads 26, can be seen.

The support body 1 may have balancing holes 22 and/or a step 23, to improve the rotational behavior of the abrasive tool 2.

Figure 3b) shows a microscopic image of a cross-sectional surface of the composite material used in the grinding tool 2 according to the second preferred embodiment. The layers 7 of the cotton fabric, arranged one above the other in the direction of the axis of rotation 12, are clearly visible. These layers are formed by individual cotton fibers 26.

Figures 4a) and 4b) show microscope images of another preferably used composite material, namely a side surface (Figure 4a) and a cross-sectional surface (Figure 4b)). In this case, the natural fiber material is paper. In Figure 4a), individual paper fibers 27 can be seen, which are stochastically aligned within a layer 7. In Figure 4b), a structure of layers 7 arranged one above the other can be seen.

Particularly preferred embodiments of the method for manufacturing a support body and the method for manufacturing an abrasive tool are illustrated by the flow diagram shown in Figure 5.

In the method 14 for manufacturing a support body 1, in a first step of the method 15 the abrasive-free composite material 6 is provided in the form of a plate, from a large number of layers 7 of a natural fiber material, arranged one on top of the other, which are joined together by means of plastic 8, preferably phenolic resin.

In a second step of method 16, a body with predetermined dimensions 17, 18, 19 (compare with Figures 1a) and 1b) is separated from the plate, preferably by waterjet cutting or by means of a band saw. In the case of the support body 1 shown in Figure 1, the body is a round.

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

This method 14 can be extended to a method 21 for manufacturing an abrasive tool 2 by arranging, in a further step of the method 28, an abrasive lining 5 having abrasive media 4, preferably super abrasive media, on a support surface 3, preferably on the circumferential side, of the support body 1, preferably by pressing and/or by adhesive bonding, whereby the abrasive lining 5 is preferably formed from a continuous slip ring or from individual abrasive segments 13.

The third step 20 of the method may optionally be carried out only after the abrasive coating 5 has been arranged on the support surface 3 of the support body 1.

Figures 6a) and 6b) show a grinding tool 2 with a support body 1, which is composed of five hollow cylindrical bodies 29, 30, 31, 32, 33, the bodies 29, 30, 31, 32, 33 being glued to one another at lateral surfaces 9. The axes of symmetry 12 of the bodies 29, 30, 31, 32, 33 are essentially congruent. Depending on the shape of the support body 1, a different number of cylindrical or hollow cylindrical bodies 29, 30, 31, 32, 33 can also be used.

The support body 1 has an adapter 34 for connecting the support body 1 or the abrasive tool 2 formed therewith, to a rotary drive, which is glued to the bodies 32 and 33. The adapter 34 can also be connected to more than two, or only to one, of the bodies 29, 30, 31, 32, 33, in particular depending on the desired rigidity of the abrasive tool 2.

The adapter 34 may be composed essentially of a metal and, as in the case shown, may be essentially hollow cylindrical.

As in the illustrated case, the adapter 34 can have holes 37 for receiving fixing means, through which the adapter 34 can be connected to a machine spindle.

The support body 1 has a central bore 11. The adapter 34 is arranged in the central bore 11, the adapter 34 extending only over a partial length 35 of the central bore 11. The central bore 11 has a funnel-shaped insertion opening 36.

An abrasive coating 5 is arranged on the circumferential side of the bodies 29 and 31.

For the manufacture of the support body 1, it is advisable to provide in a first step of method 15 a plate with a thickness 18 and, in a second step of method 16, to separate three cylindrical or hollow cylindrical bodies 30, 32 and 33, from the plate with predetermined dimensions 17, 18, 19, preferably by water jet cutting or by means of a band saw.

Furthermore, it is advisable to provide in the course of the first step of method 15, another plate with another thickness 18, and in the course of the second step of method 16, to separate two cylindrical or hollow cylindrical bodies 29 and 31, from the plate with predetermined dimensions 17, 18, 19, preferably by water jet cutting or by means of a band saw.

In the course of the second step of the method 16, the bodies 29, 30, 31, 32, 33 are joined together at side surfaces 9 after their separation from the plates, whereby the axes of symmetry 12 of the bodies 29, 30, 31, 32, 33 are essentially congruent to each other.

In a third step of the method 20, the bodies 29, 30, 31, 32, 33 are subsequently processed by machining, in particular to provide the central bore 11 with predetermined dimensions.

In another step of the method, the bodies 32, 33 are connected to the adapter 34.

Claims (15)

1. A support body (1) for an abrasive tool (2), comprising a support surface (3) preferably on the circumferential side, for an abrasive coating (5) having abrasive media (4), in particular super abrasive media, whereby the support body (1) consists essentially of a composite material (6) free of abrasive media, of a plurality of layers (7) arranged one on top of the other of a natural fiber material which are connected to one another by means of plastic (8), preferably phenolic resin, whereby the natural fiber material is preferably a cotton or paper fabric, characterized in that the support body (1) comprises a first body (29, 30, 31, 32, 33) preferably cylindrical or hollow cylindrical and at least one further body (29, 30, 31, 32, 33) preferably cylindrical or hollow cylindrical, whereby the bodies (29, 30, 31, 32, 33) are glued together, whereby the first body (29, 30, 31, 32, 33) and the at least one other body (29, 30, 31, 32, 33) each consist of the composite material (6) free of abrasive media, of a large number of layers arranged one on top of the other (7) of a natural fiber material, which are joined together by means of plastic (8), preferably phenolic resin. 2. The support body (1) according to claim 1, wherein the composite material (6) has a density of 1.0 to 2.0 g/cm3, preferably 1.4 g/cm3 and/or has a water absorption of 1.5 to 7.5%, preferably 2.4% or 5.2%. 3. The support body (1) according to claim 1 or 2, wherein the composite material (6) has a coefficient of length expansion of 20 to 40 x 10'6 K-1, preferably 30 x 10'6 K-1 and/or a thermal conductivity of 0.1 to 0.3 W/mK, preferably 0.2 W/mK. 4. The support body (1) according to one of claims 1 to 3, wherein the composite material (6) has a compressive strength at 23°C of 200 to 400 N/mm2, preferably 300 N/mm2 or 320 N/mm2, and/or a flexural strength at 23°C of 50 to 150 N/mm2, preferably 100 N/mm2 or 135 N/mm2, and/or an elastic modulus of 6000 to 8000 N/mm2, preferably 7000 N/mm2, and/or a tensile strength of 50 to 150 N/mm2, preferably 80 N/mm2 or 120 N/mm2, and/or a shear force of 1500 to 3500 N, preferably 1900 N or 3000 N. 5. The support body (1) according to one of claims 1 to 4, wherein the support body (1) has at least one side surface (9) separated from the support surface (3) for the abrasive coating (5), on which a layer (7) of the natural fiber material is arranged flat. 6. The support body (1) according to one of claims 1 to 5, wherein the support body (1) comprises a central coupling region (10), preferably with a central bore (11), for connection to a rotary drive for rotating the support body (1) or to a grinding tool (2) formed therewith, around an axis of rotation (12) extending through the coupling region (10), and/or the support body (1) is designed essentially rotationally symmetrical. 7. The support body (1) according to 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 are connected to each other at lateral surfaces (9), whereby preferably the axes of symmetry (12) of the bodies (29, 30, 31, 32, 33) are essentially congruent. 8. The 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 an abrasive tool (2) formed therewith, to a rotary drive, which is connected, preferably glued, to at least one of the bodies (29, 30, 31, 32, 33), whereby the adapter (34) preferably consists essentially of a metal and/or is essentially hollow cylindrical. 9. The support body (1) according to claim 8, wherein the support body (1) has a central bore (11), and the adapter (34) is arranged at least in sections in the central bore (11), whereby preferably the adapter (34) extends only along a partial length (35) of the central bore (11), whereby particularly preferably the central bore (11) has a funnel-shaped insertion opening (36). 10. An abrasive tool (2) with a support body (1) according to one of the preceding claims and an abrasive coating (5), which has abrasive media (4), in particular super abrasive media, which is arranged on the support surface (3), preferably on the circumferential side, of the support body (1), whereby the abrasive coating (5) is preferably formed from a continuous slip ring or from individual abrasive segments (13). 11. A method (14) for manufacturing a support body (1) for an abrasive tool (2), wherein the support body (1) comprises a support surface (3), preferably on the circumferential side, for an abrasive coating (5), which coating has abrasive media (4), in particular super abrasive media, and which essentially consists of a composite material (6) free of abrasive media, of a large number of layers (7) of a natural fiber material arranged one on top of the other, which are bonded to one another by means of plastic (8), preferably phenolic resin, whereby the natural fiber material is preferably a cotton or paper fabric, characterized in that the composite material (6) free of abrasive media is provided in the form of a plate in a first method step (15), and in a second method step (16) a preferably cylindrical or hollow cylindrical body (29, 30, 31, 32, 33) is separated from the plate, with dimensions predetermined (17, 18, 19), preferably by water jet cutting or by means of a band saw, whereby in the course of the second step of the method (16) at least one other body, preferably cylindrical or hollow cylindrical (29, 30, 32, 32, 33), is separated from the plate with predetermined dimensions (17, 18, 19), and is connected to the first body (29, 30, 31, 32, 33) by means of an adhesive bond. 12. The method (14) according to claim 11, wherein the first body and the at least one other body (29, 30, 31, 32, 33) are cylindrical or hollow cylindrical bodies, the bodies being joined to each other at lateral surfaces (9), whereby preferably the axes of symmetry (12) of the bodies (29, 30, 31, 32, 33) are essentially congruent to each other. 13. The method (14) according to claim 11 or 12, wherein in a third step of the method (20) the body or bodies (29, 20, 31, 32, 33) are further processed, preferably by machining and/or balancing and/or drilling a center bore (11). 14. The method (14) according to one of claims 11 to 13, wherein at least one of the bodies (29, 30, 31, 32, 33) in a further method step, which follows the second method step (16) or the third method step (20), is connected to an adapter (34), for connecting the support body (1) or an abrasive tool (2) formed therewith, to a rotary drive, preferably by means of an adhesive connection, whereby the adapter (34) preferably consists essentially of a metal and/or is essentially hollow cylindrical. 15. The method (21) for the manufacture of an abrasive tool (2) with a support body (1), which comprises a support surface (3), preferably on the circumferential side, for an abrasive coating (5), which comprises abrasive media (4) in particular super abrasive media, and which essentially consists of a composite material (6) free of abrasive media, of a large number of layers (7) of a natural fiber material arranged one on top of the other, which are connected to each other by means of plastic (8), preferably phenolic resin, whereby preferably the natural fiber material is a cotton or paper fabric, and an abrasive coating (5) having abrasive media (4) in particular super abrasive media, which is arranged on the support surface (3), preferably on the circumferential side, of the support body (1), whereby preferably the abrasive coating (5) is formed by a continuous slip ring or by individual abrasive segments (13), in which firstly a support body is provided (1) according to one of claims 1 to 9, and then an abrasive lining (5) having abrasive media (4), preferably super abrasive media, is arranged on a support surface, preferably on the circumferential side (3), of the support body (1), preferably by pressing and/or by adhesive bonding, whereby the abrasive lining (5) is preferably formed from a continuous slip ring or from individual abrasive segments (13).