PROCESS FOR PRODUCING A GRINDING TOOL AND GRINDING TOOL

Abstract

A process for producing a ceramically bonded grinding tool. A process for producing a ceramically bonded grinding tool (1), particularly a honing ring, with the following process steps to be carried out in chronological sequence: In a first process step, at least one grinding material (2), particularly corundum, silica, aluminum oxide and / or grinding supermaterial, at least one inorganic binder (3), particularly formed as a low-burning binder, with at least one organic binder (4), particularly in the form of epoxy resin, are made available and mixed; the at least one grinding material (2), the at least one inorganic binder (3) and the at least organic binder (4) are previously compressed in a cold compression process step (5) into a cold-compressed green part (6).The cold-compressed green part (6) in a step of the hot compression process (7) is compressed and the hot-compressed green part (8) is obtained; the hot-compressed green part (8) is calcined in a step of the burning process (9) to produce a grinding tool blank (10), particularly a honing ring blank, where during the burning process step (9), at least one organic binder (4) is calcined at least partially; the grinding tool blank (10) is finished in a downstream process step (11) for the grinding tool (1), in which the grinding material (2) is integrated.

Description

1 / 16 PROCESS FOR PRODUCING A GRINDING TOOL AND GRINDING TOOL

[001] The invention relates to a process for producing a ceramic-bonded grinding tool, particularly a honing ring. Furthermore, the invention relates to a ceramic-bonded grinding tool, particularly a honing ring, comprising a base body and at least one grinding material, which is embedded in the base body by means of at least one inorganic binder.

[002] A grinding tool in the form of a honing ring is already known from document EP 0 692 342 A2, in which, in the honing ring production process, a binder in the form of synthetic resin with fine-grained grinding material is mixed with coarse-grained, ceramically bonded grinding material, in order to ensure in the resulting honing ring an increased resistance to breakage through reduced roughness by the integrated synthetic resin.

[003] Ceramic-bonded grinding tools are produced in a cold compression process, and the tool life and / or machining properties of the grinding tool depend significantly on the grain volume and / or binder volume relative to the pore volume. In practice, dextrin-based adhesive systems have proven favorable, but have shown themselves to be insufficient in the production of particularly dense specifications.

[004] It is disadvantageous in the state of the art that grinding tools with a particularly high grain volume and / or binder volume cannot be simply produced through specification changes, such as increasing the grain ratio and / or the bonding ratio in blank tool parts. Petition 870260043659, dated 08 / 05 / 2026, page 6 / 59 2 / 16 grinding, since, particularly, presses for the necessary compression of the grinding tool blank have too weak a power. A high grain volume and / or binder volume are, however, essential for grinding tool properties, such as long tool life or favorable dressing characteristics, which can only be insufficiently satisfied in the prior art.

[005] The objective technical task of the present invention therefore consists in indicating an improved process in relation to the state of the art for producing a ceramic-bonded grinding tool, as well as for a ceramic-bonded grinding tool, in which the disadvantages of the state of the art are at least partially removed, and which are distinguished, in particular, by a high volume of grains and / or the volume of binder in the grinding tool, in order to increase the service life and / or the machining properties of the grinding tool.

[006] This task is solved by the characteristics of claim 1.

[007] Therefore, it is foreseen according to the invention that the process comprises the following process steps to be performed in chronological sequence: - In the first step of the process, at least one grinding material, particularly corundum, SiC, aluminum oxide and / or superabrasive materials, at least one inorganic binder, particularly as a low-flammability binder, and at least one organic binder, particularly in the form of epoxy resin, are made available and mixed, - at least one rectification material, at least one inorganic binder and at least one organic binder are pre-compressed into a cold-compressed green part, Petition 870260043659, dated 08 / 05 / 2026, page 7 / 59 3 / 16 - The cold-pressed green part is compressed in a hot-pressing process step into a hot-compressed green part. - the hot compressed green workpiece is burned in a firing process step for a grinding tool blank, particularly a honing ring blank, wherein during the firing process step at least one binder is calcined at least partially, and - The raw piece, in a subsequent process step, is further finished for the grinding tool, in which the grinding material is embedded.

[008] Through this two-stage pressing process, with an attached firing process, it is possible to generate very dense specifications with increased grain volume and binder volume compared to the state of the art. The blanks of the grinding tool and grinding tools are particularly suitable for demanding grinding work, and in particular, pressure stability, hardness, wear behavior, etc., can be improved compared to conventionally produced ceramic-bonded grinding tools.

[009] Due to the grain size and binder ratio, even in demanding grinding machining operations for the grinding tool, long tool life can be achieved. For example, by determining the mass density of the grinding tool, particularly with a known grinding tool composition, one can arrive at a conclusion about the present specification of the grinding tool. Microscopic examination of the grinding tool may already be sufficient to determine the present grain size, binder volume, and pore size of the grinding tool. Petition 870260043659, dated 08 / 05 / 2026, page 8 / 59 4 / 16

[0010] The technical term is defined in this context as a blank during the production process for forming the blank of the grinding tool, where the cold-pressed green part, the hot-pressed green part, as well as the blank of the grinding tool, can be removed in stable form from a mold or a furnace.

[0011] The subsequent finishing of the grinding tool blank, for the formation of the grinding tool, is generally of free choice and may comprise, for example, percussion, scraping, milling or similar machining steps. Power with respect to dressing cycles could be significantly increased (by 300%) in the honing rings produced according to the invention, compared to conventional ceramic-bonded honing rings with known high densities from the prior art.

[0012] Instead of the dextrin normally used in practice as an adhesive for grinding tools or honing rings, according to the invention, an organic binder is used as the adhesive, which is particularly preferably epoxy resin or synthetic resin. This comprises the advantage that compression process steps from the production area of ​​grinding tools bonded with synthetic resin can also be used in ceramically bonded grinding tools, in order to form particularly dense specifications of grinding tools, whereas increases in grain volumes and / or bond volumes in ceramically bonded grinding tools by compression – particularly at room temperature – are limited by physical and practical compression.

[0013] Particularly by the calcination process of the organic binder and the fusion of the inorganic binder, the grain volume and binder volume can be increased. For example, in mixture 50 Petition 870260043659, dated 08 / 05 / 2026, page 9 / 59 5 / 16 prepared for the cold compression process, there are 50% by volume to 65% by volume, preferably 55% by volume, of the volume of grains and 10% by volume, preferably 22% by volume, of binder, which in connection with a volume of pores, formed depending on the production technology, may manifest in the grinding tool blank, in 55% by volume of grains and 20% by volume of binder, the grinding tool blank being highly suitable for demanding abrasive grinding work.

[0014] As described initially, protection is also sought for a ceramically bonded grinding tool, in particular, a honing ring, comprising: - a base body and - at least one rectification material, which is embedded in the base body over at least one inorganic binder, wherein - a grain volume of the grinding material, in the range between 50% by volume and 65% by volume, particularly between 53% by volume and 58% by volume, and - a binder volume of a binder, which is in the range between 10% by volume and 35% by volume, particularly between 18% by volume and 26% by volume, of the grinding tool, wherein the volume of grains and the volume of binder together make up a maximum of 100% by volume of the grinding tool.

[0015] Differences between the total volume of grains and the volume of binder (inorganic binder and any organic binder) of the total volume of the grinding tool may be present, for example, in the form of a pore volume.

[0016] In a particularly preferred manner, it is provided that the rectification tool is produced by a process of this type. Petition 870260043659, dated 08 / 05 / 2026, page 10 / 59 6 / 16

[0017] Advantageous embodiments of the invention are defined in the dependent claims.

[0018] According to an advantageous embodiment of the invention, it is provided that at least one organic binder during the burning step is substantially calcined completely or is calcined to the extent that a volume of organic binder makes up, at most, 15% by volume, preferably, at most, 10% by volume of the blank of the grinding tool.

[0019] The proportion of organic binder, which is used for the two-stage compression process, under the use of compression processes of grinding tools bonded with synthetic resins, can be reduced in the firing process step, and depending on requirements (e.g., desired damping properties due to remaining stocks of epoxy resin), an existing measure of organic binder can be adjusted in the grinding tool through service parameters (e.g., pressure and / or temperature) in the firing process step.

[0020] Advantageously, it is foreseen that the cold pressing process step and the hot pressing process step are carried out in molds separate from each other, and preferably, it is foreseen that the mold and / or the cold-compressed green part is preheated for the hot compression process step.

[0021] Preferably, two molds are used, and before, during or after the cold compression process, the mold for the compression process step is preheated to place a preheated, cold-compressed green part. In general, it is also conceivable to preheat only the mold or the green part.

[0022] It has been shown to be advantageous that the cold-compressed green part in the cold compression process step be compressed for a first measurement and the hot-compressed green part is Petition 870260043659, dated 08 / 05 / 2026, page 11 / 59 7 / 16 compressed in the hot compression process step to a second dimension different from the first dimension, it being preferably foreseen that the hot-compressed green part is compressed to an outer diameter between 50 mm and 450 mm, an inner diameter between 20 mm and 300 mm and / or a width between 10 mm and 90 mm.

[0023] The cold compression process step mold takes into account, in this case, a shrinkage in the other process steps, and in the hot compression process step, the cold-compressed green part is compressed additionally, in order to produce a grinding tool blank with desired dimensions, after the firing process step.

[0024] According to an advantageous embodiment of the invention, it is provided that at least one organic binder is substantially completely interconnected in the hot compression process step.

[0025] In general, during the hot compression process, due to the temperatures present, at least one inorganic binder, unlike at least one organic binder, is not yet melted.

[0026] It has been shown to be advantageous that in the burning process step, at least one inorganic binder is melted, and preferably the burning process step is carried out in a furnace.

[0027] Due to the high temperatures in the burning process step, at least one binder is calcined, at least partially, preferably completely, and through the connection of at least one grinding material with at least one inorganic binder, the grinding tool blank results, with a high volume of grains and / or binder volume.

[0028] An advantageous variant consists in the fact that in the step of Petition 870260043659, dated 08 / 05 / 2026, page 12 / 59 8 / 16 cold compression process, a pressure between 20 bar and 300 bar is used, preferably between 40 bar and 60 bar, and / or substantially at ambient temperature.

[0029] By the cold compression process step, a cold-compressed green part can be obtained, in stable form, with a substantially homogeneous mixture of the fed components, for further machining.

[0030] It is particularly preferred that in the hot compression process step a pressure between 270 bar and 310 bar is used, preferably 275 bar to 285 bar, and / or a temperature between 150 °C and 200 °C, preferably between 170 °C and 180 °C.

[0031] The hot compression process step can result in a hot-compressed green part, stably prepared for the firing process step, with interconnected organic binder and inorganic binder present.

[0032] In one embodiment of the invention, the burning process step is carried out at a temperature between 600 °C and 1300 °C, preferably between 900 °C and 1000 °C.

[0033] Depending on the selection of the components of the organic and / or inorganic binders, an appropriate temperature may be selected which ensures a stable bond – particularly of at least one inorganic binder, such as at least one grinding material – the temperature being preferably selected in such a way that at least one organic binder is calcined, at least partially, preferably completely, during the firing process step and at least one inorganic binder, during the firing process step, is melted, preferably substantially, completely, for incorporation of at least one grinding material, such that undesirable temperature-related damage (such as oxidation or lump formation, Petition 870260043659, dated 08 / 05 / 2026, page 13 / 59 9 / 16 suitable for shattering) do not form at least in an inorganic binder and in the grinding material.

[0034] According to an example embodiment of the invention, it is foreseen that, starting from a grain volume of a grinding material, binder volume of the bonding materials and / or pore volume of the cold-compressed green part, after the cold compression process step, through the hot compression process step and / or the firing process step - the grain volume of the grinding tool blank is increased in a range between 50% by volume and 65% by volume, preferably between 53% by volume and 58% by volume, and / or - the binder volume of the grinding tool blank is increased in a range between 10% by volume and 15% by volume, preferably between 18% by volume and 26% by volume, and / or - a pore volume of the grinding tool is reduced in a range between 10% by vol. and 40% by vol., preferably between 22% by vol. and 28% by vol.,

[0035] wherein the grain volume, binder volume and pore volume of the hot-pressed green part and / or the blank part of the grinding tool together amount to a maximum of 100% by vol.

[0036] By increasing the grain volume and binder volume, a dense, solid, stable and / or resistant grinding tool can be produced, particularly against wear and tool breakage.

[0037] Furthermore, it is preferably foreseen that the base body is formed in an annular shape and / or in one piece, and preferably that the base body has a gear on an inner lateral surface and / or on an outer lateral surface, which can be brought into contact with a workpiece provided with Petition 870260043659, dated 08 / 05 / 2026, page 14 / 59 10 / 16 teeth.

[0038] In another embodiment it may be provided that at least one grinding material is formed, at least partially, preferably completely, of corundum, fine corundum, sintered corundum, SiC, aluminum oxide and / or superabrasive material, preferably diamond and / or cubic boron nitride.

[0039] The technical term superabrasive material is defined in this context as a grinding material with particularly favorable properties and / or particularly high hardness, such as diamond and cubic boron nitride (CBN). For example, gear wheels can be sharpened with a grinding tool.

[0040] According to an advantageous embodiment of the invention, the grinding tool is provided to have a maximum of 15% by volume, preferably a maximum of 10% by volume, of binder volume, and it is provided that the volume of organic binder is preferably formed from the group of thermoplastics and / or thermosets, particularly preferably, substantially, epoxy resin.

[0041] Thermoplastics and / or thermosets have become particularly favorable for the production of grinding tools by the two-step production process according to the invention, with epoxy resin exhibiting particularly advantageous properties with regard to bonding capacity and thermal behavior during the hot compression process step and the firing process step.

[0042] According to an advantageous embodiment of the invention, the grinding tool comprises at least one, preferably exactly one, binder, wherein the at least inorganic binder is formed in the form of a low-burning binder.

[0043] An example of low-burning binders are glasses Petition 870260043659, dated 08 / 05 / 2026, page 15 / 59 11 / 16 synthetic compounds, which are insensitive to chemical reactions and have unlimited storage potential. Low-burning binders have proven particularly advantageous in the production of grinding tools due to their material characteristics and processability.

[0044] Advantageously, it is provided that at least one binder comprises SiO2, Al2O3 and / or at least one oxide, which comprises an alkali metal and / or an alkaline earth metal.

[0045] In this way, high hardness and strength of the grinding tool are obtained, even at low furnace temperatures, and a bond with at least one grinding material, particularly diamond, cubic boron nitride and / or sintered corundum, can be produced in a particularly efficient manner.

[0046] In general, however, other inorganic binders are conceivable, and inorganic binders are particularly preferred which, during a step of the firing process, are not calcined due to sufficient temperature stability.

[0047] It was shown to be favorable that the grinding tool has an outer diameter between 50 mm and 450 mm, an inner diameter between 20 mm and 300 mm and / or a width between 10 mm and 90 mm.

[0048] According to an advantageous embodiment of the invention, the grinding tool comprises a pore volume in the range between 10% by volume and 40% by volume, preferably between 22% by volume and 28% by volume, wherein the grain volume, binder volume and pore volume together make up at most 100% by volume of the grinding tool.

[0049] An effective reduction in pore volume is particularly preferred for obtaining high grinding tool densities. Petition 870260043659, dated 08 / 05 / 2026, page 16 / 59 12 / 16 action, where the volume of pores present in the grinding tool, during an abrasive machining process, can act up to a certain degree to attenuate forces acting on the grinding tool.

[0050] The characteristics of process claims can be applied to device claims and vice versa.

[0051] Other details and advantages of the present invention are explained in more detail below, with reference to the embodiments shown in the drawings. Here they show:

[0052] Figure 1 a preferred course of a process for producing a ceramically bonded grinding tool, represented schematically in a flowchart,

[0053] Figure 2 a ceramically bonded grinding tool according to a particularly preferred embodiment, in a perspective view.

[0054] Figure 1 shows a process for producing a ceramically bonded grinding tool 1 (cf. Fig. 2), in the form of a honing ring, wherein in a first process step a grinding material 2 – for example, corundum, SiC, aluminum oxide and / or superabrasive material, together with an inorganic binder 3 – for example, for low-burning bonding – as well as an organic binder 4 – for example, in the form of epoxy resin, are made available and mixed. The mixing of the mass to form the blank of the grinding tool 10 can generally take place in a mold 12 in a cold compression process step 5 or separately. The individual components of the mass for forming a blank of the grinding tool 10 can generally be in pure form or in a mixture, for example, the grinding material 2 may be composed of corundum and superabrasive material.

[0055] Rectification material 2, inorganic binder 3 and the Petition 870260043659, dated 08 / 05 / 2026, page 17 / 59 13 / 16 organic binder 4 are pre-compressed in the cold compression process step 5 into a cold-compressed green part 6, which is schematically indicated to the right of the mold 12 in the cold compression process step 5. The cold-compressed green part 6 has a central passage opening, which, however, is generally not strictly necessary. The cold-compressed green part 6 is compressed in the cold compression process step 5 into a first dimension 13.

[0056] The green part 6 compressed cold, in a hot compression process step 7 is compressed into a green part 8 compressed hot, whereby the production process of the grinding tool blank 10 is subject to a two-stage compression process.

[0057] In step 5 of the cold compression process, in this example, a pressure of 50 bar and an ambient temperature are used.

[0058] The green part 8 is compressed in the hot compression process step 7 to a second dimension 14, different from the first dimension 13. The hot-compressed green part 8, which is schematically indicated to the right of the mold 12 of the hot compression process step 7, was compressed to an outer diameter 15 of 300 mm, an inner diameter 16 of 138 mm and a width 17 of 27 mm, the process being adaptable to any desired geometries and dimensions of the raw part of the grinding tool 10 through molds 12 and service parameters necessary for this purpose, such as pressure and temperature.

[0059] The cold compression process step 5 and the hot compression process step 7 are performed in molds 12 separate from each other, with mold 12 and the cold-compressed green part 6 being preheated for the compression process step. Petition 870260043659, dated 08 / 05 / 2026, page 18 / 59 14 / 16 hot 7.

[0060] In step 7 of the hot compression process, according to this embodiment, a pressure of 280 bar and a temperature of 180 °C are used.

[0061] In general, the pressures and / or temperatures during the compression process steps 5, 7 and / or the burning process step 9 may vary, and by a pressure stroke or temperature stroke, characteristic properties of the raw material of the grinding tool 10 may be adjusted.

[0062] The organic binder 4 is completely interconnected during the course of the hot compression process step 7.

[0063] The hot-compressed green part 8 is calcined in a step of the firing process 9 to form the raw grinding tool part 10 as a raw honing ring, wherein, during the firing process step 9, the organic binder 4, in the form of epoxy resin, is partially calcined.

[0064] In firing process step 9, the organic binder 3 is melted, and firing process step 9 is carried out in a furnace 19. Firing process step 9, in this embodiment, is carried out at a temperature of 950°C.

[0065] The organic binder 4, in the form of epoxy resin, during the process step that ima 9 is calcined to the extent that a volume of organic binder 10 makes up 10% by volume of the blank of the grinding tool 10.

[0066] Starting from a grain volume of a grinding material 2, the binder volume of the binders 3, 4 and pore volume, the green part 6 is cold-compressed, after the cold compression process step 5, the hot compression process step 5 and the firing process step 9, in the embodiment shown. - the grain size of the tool blank Petition 870260043659, dated 08 / 05 / 2026, page 19 / 59 15 / 16 rectification 10 is increased to 55% by volume, - the binder volume of the grinding tool blank 10, despite the epoxy resin calcination process, is increased in the firing process step 9 to 20% by volume, and - the pore volume of grinding tool 1 is reduced to 25% by volume,

[0067] wherein the volume of grains, the volume of binder and the volume of pores of the hot compressed green part 8 and of the blank part of the grinding tool 10, in each case, together make up 100% by volume.

[0068] The blank of the grinding tool 10, in a process step 11 subsequent to the burning process step 9, is subsequently finished for the grinding tool 1, in which the grinding material 2 is integrated.

[0069] Figure 2 shows a ceramically bonded grinding tool 1, in the form of a honing ring, which was produced by a process according to Figure 1. The grinding tool 1 comprises a base body 19 and the grinding material 2, which is integrated into the base body 19 by means of the inorganic binder 3.

[0070] The base body is formed in an annular shape and in one piece, with the base body 17, on an inner lateral surface 20, having a gear 22 to be put in contact with a workpiece provided with teeth. In general, the gear 22 may also be arranged on an outer lateral surface 21.

[0071] Grinding material 2 consists of a mixture of superabrasive materials, in the form of diamond and cubic boron nitride, and grinding material 2 may alternatively or additionally also comprise other grinding materials 2.

[0072] Grinding tool 1 has the dimensions of the blank workpiece of grinding tool 10 according to the figure. Petition 870260043659, dated 08 / 05 / 2026, page 20 / 59 16 / 16 1, and in general, an insignificant contraction may occur during the course of the burning process step 9. The outer diameter 15 is 300 mm, the inner diameter 16 is 138 mm and the width 17 is 27 mm.

[0073] The grain volume of grinding material 2 is % by volume of grinding tool 1, the binder volume of binders 3, 4 is 20% by volume of grinding tool 1 and the pore volume is 25% by volume of grinding tool 1.

[0074] Grinding tool 1 has 10% by volume of organic binder, the organic binder being present as an epoxy resin from the thermoplastic and thermoset group.

[0075] Grinding tool 1 comprises an inorganic binder 3, the inorganic binder 3 being formed in the form of a low-temperature binder, the low-temperature binder comprising SiO2, Al2O3, R2O3 and alkali or alkaline earth metal oxides. Petition 870260043659, dated 08 / 05 / 2026, page 21 / 59

Claims

1 / 6 CLAIMS 1. Process for producing a ceramically bonded grinding tool (1), particularly a honing ring, characterized by the following process steps to be carried out in chronological sequence: - in a first process step, at least one grinding material (2), particularly corundum, SiC, aluminum oxide and / or superabrasive material, at least one binder (3), particularly formed as a low-temperature binder, with at least one organic binder (4), particularly in the form of epoxy resin, are made available and mixed, - the at least one grinding material (2), the at least one inorganic binder (3) and the at least organic binder (4) are previously compressed in a cold compression process step (5) into a cold-compressed green part (6),The cold-compressed green part (6) is pressed in a hot compression process (7) to obtain a hot-compressed green part (8), - the hot-compressed green part (8) is calcined in a burning process step (9) to produce a grinding tool blank (10), particularly a honing ring blank, wherein during the burning process step (9), at least one organic binder (4) is calcined at least partially, and - the grinding tool blank (10) is finished in a process step (11), subsequent to the burning process step (9), to produce the grinding tool (1), in which the grinding material (2) is integrated.

2. Process according to claim 1, characterized in that at least one organic binder (4) is calcined Petition 870260043659, dated 08 / 05 / 2026, page 22 / 59 2 / 6 completely, during the burning process step (9), insofar as a volume of organic binder makes up, at most, 15% by vol., preferably, at most, 10% by vol., of the blank of the grinding tool (10).

3. Process according to claim 1 or 2, characterized in that the cold compression process step (5) and the hot compression process step (7) are carried out in molds (12) separated from each other, it being preferably provided that the mold (12) and / or the cold-compressed green part (6) is preheated for the hot compression process step (7).

4. Process according to any of the preceding claims, characterized in that the cold-compressed green part (6), in the cold compression process step (5) is compressed to a first dimension (13) and the hot-compressed green part (8) in the hot compression process step (7) is compressed to a second dimension (14), different from the first dimension (13), it being preferably provided that the hot-compressed green part (8) is compressed to an outer diameter (15) between 50 mm and 450 mm, an inner diameter (16) between 20 mm and 300 mm and / or a width (17) between 10 mm and 90 mm.

5. Process according to any of the preceding claims, characterized in that at least one organic binder (4) is completely cured in the hot compression process step (7).

6. Process according to any of the preceding claims, characterized in that in the burning process step (9), at least one inorganic binder (3) is melted, it being provided, preferably, that the burning process step (9) is carried out in a furnace (18).

7. Process in accordance with any of the preceding claims in Petition 870260043659, dated 08 / 05 / 2026, page 23 / 59 3 / 6, characterized by the fact that in the cold compression process step a pressure between 20 bar and 300 bar is used, preferably between 40 bar and 60 bar, and / or ambient temperature.

8. A process according to any of the preceding claims, characterized in that in the hot compression process step a pressure between 270 bar and 310 bar is used, preferably 275 bar to 285 bar, and / or a temperature between 150 °C and 200 °C, preferably between 170 °C and 180 °C.

9. Process according to any of the preceding claims, characterized in that the burning process step (9) is carried out at a temperature between 600 °C and 1300 °C, preferably between 900 °C and 1000 °C.

10. Process according to any of the preceding claims, characterized in that, starting from a grain volume of a grinding material (2), binder volume of the binders (3, 4) and / or pore volume of the cold-compressed green workpiece (6), after the cold compression process step (5), the hot compression process step (7) and / or the burning process step (9), - the grain volume of the grinding tool blank (10) is increased in a range between 50% by vol. and 65% by vol., preferably between 53% by vol. and 58% by vol., and / or - a binder volume of the grinding tool blank (10) is increased in a range between 10% by vol. and 35% by vol., preferably between 18% by vol. and 26% by volume, and / or - a pore volume of the grinding tool (1) is reduced in a range between 10% by volume and 40% by volume, preferably between 22% by volume and 28% by volume., wherein the volume of grains, the volume of binder and the volume of pores of the hot compressed green part (8) and / or the part Petition 870260043659, dated 08 / 05 / 2026, page 24 / 59 4 / 6 gross of the grinding tool (10) together add up to a maximum of 100% by volume.

11. Ceramically bonded grinding tool (1), particularly a honing ring, produced by the process defined in any one of claims 1 to 10, comprising: - a base body (19) and - at least one grinding material (2), which is integrated into the base body (19) by means of at least one inorganic binder (3), characterized in that - the grain volume of the grinding material (2) is in the range between 50% by vol. and 65% by vol., particularly between 53% by vol. and 58% by vol., and - the binder volume of a binder (3, 4) is in the range between 10% by vol. and 35% by vol., particularly between 18% by vol. and 26% by vol. of the grinding tool (1), and the grain volume and binder volume together comprise at most 100% by vol. of the grinding tool (1).

12. Grinding tool (1) according to claim 11, characterized in that the grinding tool (1) is produced by a process as defined in any one of claims 1 to 10.

13. Grinding tool (1) according to claim 11 or 12, characterized in that the base body (19) is annular in shape and / or in one piece, preferably provided that the base body (19) has on an inner lateral surface (20) and / or on an outer lateral surface (21) a gear (22) that can be put in contact with a workpiece provided with teeth.

14. Grinding tool (1) according to any Petition 870260043659, dated 08 / 05 / 2026, page 25 / 59 5 / 6 one of claims 11 to 13, characterized in that at least one grinding material (2) may be formed, at least partially, preferably completely, of corundum, preferably fine corundum, sintered corundum, SiC, aluminum oxide and / or superabrasive material, preferably diamond and / or cubic boron nitride.

15. Grinding tool (1) according to any one of claims 11 to 14, characterized in that the grinding tool (1) has a maximum of 15% by volume, preferably a maximum of 10% by volume, of organic binder, wherein, preferably, the organic binder is formed from the group of thermoplastics and / or thermosets, particularly preferably epoxy resin.

16. Grinding tool (1) according to any one of claims 11 to 15, characterized in that the grinding tool (1) comprises at least one, preferably exactly one, inorganic binder (3), wherein the at least one inorganic binder (3) is in the form of a low-temperature binder.

17. Grinding tool (1) according to claim 16, characterized in that at least one inorganic binder (3) comprises SiO2, Al2O3, B2O3 and / or at least one oxide, comprising an alkali metal and / or an alkaline earth metal.

18. Grinding tool (1) according to any one of claims 11 to 17, characterized in that the grinding tool (1) has an outer diameter (15) between 50 mm and 450 mm, an inner diameter (16) between 20 mm and 300 mm and / or a width (17) between 10 mm and 90 mm.

19. Grinding tool (1) according to any one of claims 11 to 18, characterized in that the grinding tool (1) comprises a pore volume in the range between 10% by vol. and 40% by vol., preferably between 22% by vol. and 28% by vol., wherein the grain volume, binder volume and pore volume together amount to at most 100% by vol. of the grinding tool (1).

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