Beta-Sic grinding tool and manufacturing method and application thereof

Abstract

The invention relates to the technical field of grinding tools, and particularly discloses a beta-Sic grinding tool and a manufacturing method and application thereof. The invention discloses a beta-Sic grinding tool. Raw materials of the grinding tool comprise the following components in parts by weight: 80-90 parts of a beta-Sic grinding material, 3-5 parts of water glass, 3-5 parts of carbon powder and 10-14 parts of a binding agent, the binding agent comprises the following raw materials: feldspar, talc and oxide powder. According to the grinding tool, beta-Sic is adopted as a grinding material, a mixture of feldspar, talc and oxide powder is used as a binding agent, and carbon powder is added for firing, so that the grinding tool is high in cutting force, high in hardness, capable of effectively resisting abrasion generated in the channel grinding process, durable, small in grinding heat and capable of rapidly forming an abrasion small plane or an inner concave surface in the grinding process, and the ground channel is good in smoothness; and the shape of the channel is well kept, so that the efficiency, the precision and the surface quality of the grinding process are improved.

Description

Technical Field

[0001] The present application relates to the technical field of abrasive tools, and in particular to a β-Sic abrasive tool and a manufacturing method and application thereof. Background Art

[0002] Bearing rings are generally made of high-carbon chromium bearing steel. Due to different working conditions, commonly used materials include stainless bearing steel, high-temperature bearing steel, carburized bearing steel, etc. Grinding and superfinishing are the main processes of bearing ring processing, which are related to the smooth operation and service life of the bearing. It must not only meet the requirements of roughness and dimensional accuracy, but also meet the requirements of consistency of the machined surface, avoid burns, and minimize surface hardness changes. In order to ensure the consistency of ring quality, in addition to the guarantee of grinding fluid and processing technology, the type and selection of abrasives are also critical. Conventional abrasives use corundum materials, but abrasives made of corundum wear quickly and are easy to get chips, which affects the improvement of production efficiency. Moreover, the rapid wear of abrasives will affect the accuracy and surface quality of the grinding process. Summary of the invention

[0003] In order to improve the efficiency, precision and surface quality of the grinding process, the present application provides a β-Sic grinding tool and a manufacturing method and application thereof.

[0004] In the first aspect, the present application provides a β-Sic abrasive tool, which adopts the following technical solution: A β-Sic grinding tool, the raw materials of which include the following components in parts by weight: 80-90 parts of β-Sic abrasive, 3-5 parts of water glass, 3-5 parts of carbon powder, and 10-14 parts of a binder; the raw materials of the binder include feldspar, talc, and oxide powder.

[0005] By adopting the above technical scheme, β-Sic has the same cubic structure as diamond or sphalerite, and the arrangement of atoms is a carbon atom tetrahedron group centered on the silicon atom. β-Sic is used as an abrasive, a mixture of feldspar, talc, and oxide powder is used as a binder, and the abrasive tool fired with carbon powder is added. The tool has strong cutting force and high hardness, can effectively resist the wear generated during groove grinding, is durable, has less grinding heat, can quickly form a worn small plane or inner concave surface during grinding, has good groove finish after grinding, and maintains a good groove shape, thereby improving the efficiency, accuracy and surface quality of the grinding process.

[0006] In a specific embodiment, the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide.

[0007] In a specific embodiment, the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide in the oxide powder material is (60-65): (10-20): (10-12): (5-10): (1-5).

[0008] In a specific embodiment, the particle size of the oxide powder is 950-1050.

[0009] By adopting the above technical scheme, using a composite oxide powder composed of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide, and limiting the ratio and particle size of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide, the percentage of pores and abrasive grains in the grinding tool can be increased, the number of abrasive grains participating in grinding per unit area of ​​the grinding tool during the grinding process is increased, the cutting pressure borne by a single abrasive grain is reduced, the durability of the grinding tool is correspondingly improved, and the processing quality and processing efficiency can be improved at the same time.

[0010] In a specific embodiment, the weight ratio of feldspar, talc and oxide powder in the binder is 0.5::0.5:3.

[0011] In a specific embodiment, the β-Sic abrasive includes β-Sic particles with a particle size of 80#-150#.

[0012] In the second aspect, the present application provides a method for manufacturing a β-SiC abrasive tool, which adopts the following technical solution: A method for manufacturing a β-SiC grinding tool comprises the following steps: Pressing: First, stir and mix the β-Sic abrasive, water glass, carbon powder and binder evenly, and press them into a grinding wheel blank; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650-690°C at a rate of 150°C per hour, kept warm for 1 hour, then heated to 870°C-890°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain β-Sic abrasive tool.

[0013] By adopting the above technical scheme, during the firing process, β-Sic will be transformed into α-Sic when the temperature is higher than 2000°C; the oxidation of β-Sic begins at about 800°C, and the maximum sintering temperature does not exceed 890°C. Water vapor accelerates the reaction rate in an oxidizing atmosphere. During the sintering process, there must be sufficient oxygen supply to form a SiO film on the surface of the abrasive. When the balanced covering layer is completed, further oxidation can be prevented. At the same time, the blackening of the surface and interior of the abrasive can be avoided, and the glass binder cannot fully react, and the abrasive cannot be sintered.

[0014] In the third aspect, the present application provides an application of a β-Sic abrasive tool, which adopts the following technical solution: The β-Sic grinding tool can be used for processing difficult-to-grind bearing materials such as stainless bearing steel G95Cr18, high-nitrogen stainless steel, and high-temperature bearing steel Cr4Mo4V.

[0015] By adopting the above technical solution, the β-Sic abrasive tool is hard and tough, has less magnetic matter, evenly crushed abrasive particles, strong cutting force, not easy to stick to chips, and not easy to clog the cutting edge. Therefore, the grinding stability is good, the workpiece size consistency is good, and taper is not easy to produce. Therefore, it can be used for the processing of difficult-to-grind bearing materials such as stainless bearing steel G95Cr18, high nitrogen stainless steel, and high-temperature bearing steel Cr4Mo4V.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, β-Sic has the same cubic structure as diamond or sphalerite, and the arrangement of atoms is a carbon atom tetrahedron group centered on silicon atoms. β-Sic is used as an abrasive, and a mixture of feldspar, talc, and oxide powder is used as a binder. The abrasive tool fired with carbon powder is strong in cutting force and high in hardness. It can effectively resist the wear generated during groove grinding, is durable, and generates less grinding heat. During grinding, a small wear plane or inner concave surface can be formed quickly. After grinding, the groove has good finish and the groove shape is well maintained, thereby improving the efficiency, accuracy, and surface quality of the grinding process; 2. In the method of the present application, during the firing process, when the temperature is higher than 2000°C, β-Sic will be converted into α-Sic; the oxidation of β-Sic begins at about 800°C, and the maximum sintering temperature does not exceed 890°C. Water vapor accelerates the reaction rate in an oxidizing atmosphere. During the sintering process, there must be sufficient oxygen supply to form a SiO film on the surface of the abrasive. When the balanced covering layer is completed, further oxidation can be prevented, and the surface and interior of the abrasive can be prevented from blackening, the glass binder cannot fully react, and the abrasive cannot be sintered; 3. The β-Sic abrasive tool in this application is hard and tough, has less magnetic matter, evenly crushed abrasive particles, strong cutting force, not easy to stick to chips, and not easy to clog the cutting edge. Therefore, it has good grinding stability, good workpiece size consistency, and is not easy to produce taper. It can be used for the processing of difficult-to-grind bearing materials such as stainless bearing steel G95Cr18, high nitrogen stainless steel, and high-temperature bearing steel Cr4Mo4V. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with embodiments.

[0018] All raw materials in the examples are commercially available. Example

[0019] Example 1 Embodiment 1 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 80kg of β-Sic abrasive, 3kg of water glass, 3kg of carbon powder, and 10kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 60:10:10:5:1; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 870°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0020] Example 2 Embodiment 2 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 85kg of β-Sic abrasive, 4kg of water glass, 4kg of carbon powder, and 12kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 60:10:10:5:1; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 870°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0021] Example 3 Embodiment 3 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 90kg of β-Sic abrasive, 5kg of water glass, 5kg of carbon powder, and 14kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 60:10:10:5:1; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 870°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0022] Example 4 Embodiment 4 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 85kg of β-Sic abrasive, 4kg of water glass, 4kg of carbon powder, and 12kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 63:15:11:8:3; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 870°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0023] Example 5 Embodiment 5 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 85kg of β-Sic abrasive, 4kg of water glass, 4kg of carbon powder, and 12kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of W40; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder material The particle size is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 65:20:12:10:5; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 870°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0024] Example 6 Embodiment 6 provides a method for manufacturing a β-SiC grinding tool, comprising the following steps: Pressing: First, 85kg of β-Sic abrasive, 4kg of water glass, 4kg of carbon powder, and 12kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 63:15:11:8:3; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 670°C at a rate of 150°C per hour, kept warm for 1 hour, and then heated to 880°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0025] Example 7 Embodiment 7 provides a method for manufacturing a β-SiC abrasive tool, comprising the following steps: Pressing: First, 85kg of β-Sic abrasive, 4kg of water glass, 4kg of carbon powder, and 12kg of binder are stirred and mixed evenly, and pressed into a grinding wheel blank; wherein the β-Sic abrasive is β-Sic particles with a particle size of 150#; the raw materials of the binder include a mixture of feldspar, talc, and oxide powder materials, and the weight ratio of feldspar, talc, and oxide powder materials is 0.5:0.5:3; the oxide powder material includes a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide, and magnesium oxide, and the oxide powder The particle size of the material is 1000, and the weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide is 63:15:11:8:3; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 690°C at a rate of 150°C per hour, kept warm for 1 hour, then heated to 890°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain a β-Sic grinding tool.

[0026] Application Examples Application Example 1 Application Example 1 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 1 was used to perform groove processing on high-speed steel W18Cr4V.

[0027] Application Example 2 Application Example 2 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 2 was used to perform groove processing on high-speed steel W18Cr4V.

[0028] Application Example 3 Application Example 3 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 3 was used to perform groove processing on high-speed steel W18Cr4V.

[0029] Application Example 4 Application Example 4 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 4 was used to perform groove processing on high-speed steel W18Cr4V.

[0030] Application Example 5 Application Example 5 provides an application of a β-SiC grinding tool, comprising the following steps: The β-SiC grinding tool in Example 5 was used to perform groove processing on high-speed steel W18Cr4V.

[0031] Application Example 6 Application Example 6 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 6 was used to perform groove processing on high-speed steel W18Cr4V.

[0032] Application Example 7 Application Example 7 provides an application of a β-SiC abrasive tool, comprising the following steps: The β-SiC grinding tool in Example 7 was used to perform groove processing on high-speed steel W18Cr4V.

[0033] Comparative Application Examples Comparative application example 1 Comparative Application Example 1 provides an application of a TL150# abrasive tool, comprising the following steps: The high speed steel W18Cr4V was grooved using TL150# abrasive tool.

[0034] Comparative Application Example 2 Comparative Application Example 2 provides an application of a GB46# abrasive tool, comprising the following steps: GB46# abrasive tool was used to process grooves on high-speed steel W18Cr4V.

[0035] Performance test Grinding performance: Test the cutting depth, durability, maximum feed rate, roughness and groove shape of the abrasive tools in each application example and comparative application example.

[0036] Table 1 Performance test results of abrasive tools Combining Table 1, Application Example 1 and Comparative Application Examples 1-2, it can be seen that the abrasive tool in the present application adopts β-Sic abrasive, β-Sic has the same cubic structure as diamond or sphalerite, and the arrangement of atoms is a carbon atom tetrahedron group centered on silicon atoms. A mixture of feldspar, talc, and oxide powder is used as a binder, which can improve the cutting force and durability of the abrasive tool. The outer diameter and groove finish after grinding are better, the groove curvature is better, the cutting force is stronger, and the wear resistance is good, thereby improving the grinding performance and grinding efficiency of the abrasive tool.

[0037] Combining Table 1 and Application Examples 1-3, it can be seen that when preparing abrasive tools, using the ratio of raw materials in Examples 1-3, the grinding performance of the abrasive tools is better.

[0038] Combining Table 1, Application Example 2, Application Example 4 and Application Example 5, the grinding efficiency of the abrasive tool in Application Example 4 is the highest. It can be seen that when preparing the abrasive tool, the ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide in the oxide powder material in Example 4 is optimal, so that the grinding efficiency of the abrasive tool is higher.

[0039] Combining Table 1, Application Example 4, Application Example 6 and Application Example 7, it can be seen that when preparing the grinding tool, according to the sintering conditions in Example 4, Example 6 and Example 7, the grinding performance of the grinding tool is better.

[0040] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A β-Sic abrasive tool, characterized in that: The raw materials of the grinding tool include the following components in parts by weight: 80-90 parts of β-Sic abrasive, 3-5 parts of water glass, 3-5 parts of carbon powder, and 10-14 parts of a binder; the raw materials of the binder include feldspar, talc, and oxide powder.

2. A β-Sic grinding tool according to claim 1, characterized in that: The oxide powder material comprises a mixture of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide.

3. A β-Sic grinding tool according to claim 2, characterized in that: The weight ratio of silicon dioxide, aluminum oxide, sodium oxide, boron oxide and magnesium oxide in the oxide powder material is (60-65): (10-20): (10-12): (5-10): (1-5).

4. A β-SiC grinding tool according to claim 3, characterized in that: The particle size of the oxide powder material is 950-1050.

5. A β-Sic grinding tool according to claim 1, characterized in that: The weight ratio of feldspar, talc and oxide powder in the binder is 0.5::0.5:

3.

6. A β-Sic grinding tool according to claim 1, characterized in that: The β-Sic abrasive comprises β-Sic particles with a particle size of 80#-150#.

7. A method for manufacturing a β-SiC grinding tool according to any one of claims 1 to 6, characterized in that: The following steps are involved: Pressing: First, stir and mix the β-Sic abrasive, water glass, carbon powder and binder evenly, and press them into a grinding wheel blank; Firing: The grinding wheel blank is fired, firstly heated from room temperature to 100°C at a rate of 50°C per hour, then air is introduced and kept warm for 6 hours for drying, then heated to 650-690°C at a rate of 150°C per hour, kept warm for 1 hour, then heated to 870°C-890°C at a rate of 80°C per hour, kept at the temperature for 3 hours, and then cooled to room temperature with the furnace to obtain β-Sic abrasive tool.

8. An application of the β-SiC grinding tool as claimed in any one of claims 1 to 6, characterized in that: The β-Sic grinding tool can be used for processing difficult-to-grind bearing materials such as stainless bearing steel G95Cr18, high-nitrogen stainless steel, and high-temperature bearing steel Cr4Mo4V.

Images