Resin grinding wheel based on glass fiber and carbon fiber composite material and preparation method

Abstract

The invention relates to a resin grinding wheel based on a glass fiber and carbon fiber composite material and a preparation method, the resin grinding wheel comprises a grinding body, a first reinforcing mesh is arranged in the grinding body, and a second reinforcing mesh is arranged on the surface of one side of the grinding body. Different weaving methods are adopted; a special pretreatment solution is adopted for pretreatment, a fiber net higher in strength and lighter is obtained, the fiber net can be used as a reinforcing material of a resin grinding wheel for high-speed heavy-load precise grinding, the strength and high temperature resistance of a resin cutting blade, especially a large cutting blade are improved, meanwhile, abrasion of the cutting blade is reduced, and the service life of the cutting blade is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of grinding tools, and in particular to a resin grinding wheel based on a glass fiber and carbon fiber composite material and a preparation method thereof. Background Art

[0002] High-speed heavy-duty steel billet grinding wheels are mainly used for grinding ingots and steel plates, that is, using grinding machinery to process the surface of steel billets and remove surface defects (such as surface cracks, surface decarburization, subcutaneous bubbles and inclusions, etc.), which is one of the important means to improve the quality of steel products. The important factors affecting the cost of this process are metal removal rate and grinding ratio. The metal removal rate is evaluated by the weight of metal ground off per unit time, and the grinding ratio refers to the ratio of the weight of metal ground off to the weight of the grinding wheel consumed. According to the principle of grinding dynamics, to achieve a large metal removal rate, the main method is to increase the linear speed of the grinding wheel and increase the grinding pressure. Increasing the grinding pressure and the linear speed of the grinding wheel will affect the service life of the grinding wheel. This type of grinding wheel uses a linear speed of 80m / s, a grinding pressure of about 1000Kg, and a feed rate of more than (1-5)mm. The explosion of the grinding wheel during operation will cause significant losses, so the quality requirements for the grinding wheel are very stringent.

[0003] In order to enhance the operating speed and safety of resin grinding wheel products, and ensure that the grinding wheel has ideal rigidity, sharpness and working surface quality during operation, the overall product structure design of resin high-speed grinding wheel focuses on reinforcing materials. In order to meet the above work requirements without increasing its production cost, traditional high-speed grinding wheels are mainly reinforced with glass fiber, and the performance of the product is improved by the number of layers of reinforcing materials and the number of meshes. However, there are few studies on the materials used for mesh sheets, and the specifications of such resin grinding wheel meshes are mainly below 100-500mm, while those above 1.1m are mainly used for large slices for hot rolling cutting of steel, and the production is relatively small, and most of them need to be imported. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a resin grinding wheel based on glass fiber and carbon fiber composite materials and a preparation method thereof, which can solve the problem that the mesh in the general resin grinding wheel adopts single glass fiber and has poor wear resistance.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a resin grinding wheel based on glass fiber and carbon fiber composite material, the innovation of which is: comprising a grinding body, a first reinforcing mesh is provided in the grinding body, a second reinforcing mesh is provided on the surface of one side of the grinding body, and the grinding body comprises the following components in parts by weight: 20-30 parts by weight of SG abrasive, 15-25 parts by weight of chrome corundum abrasive, 25-35 parts by weight of white corundum abrasive, 5-15 parts by weight of phenolic resin powder, 1-5 parts by weight of polytetrafluoroethylene powder, 5-10 parts by weight of resin liquid, 5-15 parts by weight of chopped carbon fiber, 5-10 parts by weight of spar, and 1-5 parts by weight of tool steel powder;

[0006] The first reinforcing mesh sheet and the second reinforcing mesh sheet are composite mesh cloths of glass fiber and carbon fiber, and both sides of the composite mesh cloths are coated with treatment liquid and baked in an oven.

[0007] Furthermore, the baking temperature of the composite mesh is 100-120° C., and the baking time is 2-10 min.

[0008] Furthermore, the treatment liquid is prepared by mixing phenolic resin liquid and epoxy resin liquid, wherein the mass ratio of the phenolic resin liquid to the epoxy resin liquid is 3:1.

[0009] Furthermore, the length of the chopped carbon fiber is 1-2 mm, and the diameter is 5-10 μm; the length of the chopped glass fiber is 1.5-2 mm, and the diameter is 5-10 μm.

[0010] A method for preparing a resin grinding wheel based on a glass fiber and carbon fiber composite material, the innovation of which is: the specific preparation method is as follows:

[0011] S1. Weigh each raw material according to the weight ratio;

[0012] S2, SG abrasive, chrome corundum abrasive and white corundum abrasive are mixed to obtain an abrasive mixture, and the abrasive mixture is added to the resin liquid for soaking, short carbon fiber short glass fiber is mixed with phenolic resin powder and polytetrafluoroethylene powder, and then the mixture is added to the soaked abrasive mixture, mixed evenly, and then cryolite and tool steel powder are added in sequence and mixed evenly;

[0013] S3, putting the mixed material obtained in step S2 into a vibrating screen for screening twice, and the particles obtained by screening through the screen are used as molding materials for standby use;

[0014] S4, first put a reinforcing mesh into the forming mold, then weigh a suitable weight of the forming material, put it into the forming mold and flatten it, and put another reinforcing mesh, then add the remaining suitable weight of the forming material into the forming mold and flatten it, and then press and form it to obtain a grinding wheel blank; the reinforcing mesh is made by a flat plus twisted belt binding weaving method;

[0015] S5, take out the grinding wheel blank, and put it into the oven, raise the temperature in the oven to 160-175°C and keep it warm for 6-8h, then cool it naturally to room temperature, and take it out to obtain the finished product;

[0016] S6. Pack and store the finished resin grinding wheels that have passed the inspection.

[0017] Furthermore, the mesh size of the vibrating screen is 10-16 meshes.

[0018] Furthermore, in step S5, the temperature of the oven is increased from room temperature at a heating rate of 0.5°C / min.

[0019] The advantages of the present invention are:

[0020] 1) In the present invention, glass fibers of different quantities and finenesses are compounded with carbon fibers and different weaving methods are adopted; a special pretreatment liquid is used for pretreatment to obtain a fiber mesh with higher strength and lighter weight, which can be used as a reinforcing material for resin grinding wheels for high-speed and heavy-load precision grinding, improve the strength and high temperature resistance of resin cutting blades, especially large cutting blades, while reducing the wear of the cutting blades and extending the life of the cutting blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 The present invention is a structural schematic diagram of a resin grinding wheel based on a glass fiber and carbon fiber composite material.

[0023] Marked in the figure: 1, grinding body; 2, first reinforcing mesh; 3, second reinforcing mesh. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 A resin grinding wheel based on a glass fiber and carbon fiber composite material is shown, comprising a grinding body, wherein a first reinforcing mesh 2 is provided inside the grinding body 1, and a second reinforcing mesh 3 is provided on the surface of one side of the grinding body 1, and the grinding body 1 comprises the following components in parts by weight: 20-30 parts by weight of SG abrasive, 15-25 parts by weight of chrome corundum abrasive, 25-35 parts by weight of white corundum abrasive, 5-15 parts by weight of phenolic resin powder, 1-5 parts by weight of polytetrafluoroethylene powder, 5-10 parts by weight of resin liquid, 5-15 parts by weight of chopped carbon fiber, 5-10 parts by weight of cryolite, and 1-5 parts by weight of tool steel powder.

[0027] The first reinforcing mesh 2 and the second reinforcing mesh 3 are composite meshes of glass fiber and carbon fiber, and both sides of the composite meshes are coated with treatment liquid and baked in an oven.

[0028] The baking temperature of the composite mesh is 100-120°C, and the baking time is 2-10 minutes.

[0029] The resin liquid is prepared by mixing phenolic resin liquid and epoxy resin liquid, wherein the mass ratio of the phenolic resin liquid to the epoxy resin liquid is 3:1.

[0030] The length of the chopped carbon fiber is 1-2 mm and the diameter is 5-10 μm; the length of the chopped glass fiber is 1.5-2 mm and the diameter is 5-10 μm.

[0031] A preparation method of a resin grinding wheel based on a glass fiber and carbon fiber composite material, the specific preparation method is as follows:

[0032] S1. Weigh each raw material according to the weight ratio;

[0033] S2, SG abrasive, chrome corundum abrasive and white corundum abrasive are mixed to obtain an abrasive mixture, and the abrasive mixture is added to the resin liquid for soaking, short carbon fiber short glass fiber is mixed with phenolic resin powder and polytetrafluoroethylene powder, and then the mixture is added to the soaked abrasive mixture, mixed evenly, and then cryolite and tool steel powder are added in sequence and mixed evenly;

[0034] S3, putting the mixed material obtained in step S2 into a vibrating screen for screening twice, and the particles obtained by screening through the screen are used as molding materials for standby use;

[0035] S4, first put a reinforcing mesh into the forming mold, then weigh a suitable weight of the forming material, put it into the forming mold and flatten it, and put another reinforcing mesh, then add the remaining suitable weight of the forming material into the forming mold and flatten it, and then press and form it to obtain a grinding wheel blank; the reinforcing mesh is made by a flat plus twisted belt binding weaving method;

[0036] S5, take out the grinding wheel blank, and put it into the oven, raise the temperature in the oven to 160-175°C and keep it warm for 6-8h, then cool it naturally to room temperature, and take it out to obtain the finished product;

[0037] S6. Pack and store the finished resin grinding wheels that have passed the inspection.

[0038] The mesh size of the vibrating screen is 10-16 mesh.

[0039] In step S5, the temperature of the oven is increased from room temperature at a heating rate of 0.5°C / min.

[0040] The warp and weft strength of the composite fiber mesh is improved before and after gluing. Its radial strength is higher than that of pure fiber mesh cloth and 62.7% higher than that of pure glass fiber. As shown in the following table:

[0041] Table 1 Comparison of strength of composite fiber, carbon fiber and glass fiber before and after coating

[0042]

[0043] Usually, the product structure of all-glass fiber reinforced super-large resin slices with specifications of 1300mm*150mm is 4 large meshes (1280mm) + 2 small meshes (600mm), thickness 150mm, cutting speed 80m / s, and crushing strength 110m / s. The composite mesh adopts the same weaving method as glass fiber to prepare the product structure of super-large resin slices of the same specifications: the composite glass fiber carbon fiber structure is 4 large meshes (1280mm) + 1 small mesh (600mm), the thickness of the grinding wheel slice can be reduced to 140mm, and the crushing strength reaches 125m / s. The durability of cutting 500mm hot steel billets can be increased from 23 cuts to 27 cuts, which meets the market demand for slices, and the price is also relatively affordable.

[0044] Table 2 Performance and cost accounting of composite fiber, carbon fiber and glass fiber reinforced grinding wheels

[0045]

[0046] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A resin grinding wheel based on glass fiber and carbon fiber composite material, characterized in that: It comprises a grinding body, wherein a first reinforcing mesh is arranged in the grinding body, a second reinforcing mesh is arranged on the surface of one side of the grinding body, and the grinding body comprises the following components in parts by weight: 20-30 parts by weight of SG abrasive, 15-25 parts by weight of chrome corundum abrasive, 25-35 parts by weight of white corundum abrasive, 5-15 parts by weight of phenolic resin powder, 1-5 parts by weight of polytetrafluoroethylene powder, 5-10 parts by weight of resin liquid, 5-15 parts by weight of chopped carbon fiber, 5-10 parts by weight of cryolite, and 1-5 parts by weight of tool steel powder; The first reinforcing mesh sheet and the second reinforcing mesh sheet are composite mesh cloths of glass fiber and carbon fiber, and both sides of the composite mesh cloths are coated with treatment liquid and baked in an oven.

2. The resin grinding wheel based on glass fiber and carbon fiber composite material according to claim 1, characterized in that: The baking temperature of the composite mesh is 100-120° C., and the baking time is 2-10 minutes.

3. The resin grinding wheel based on glass fiber and carbon fiber composite material according to claim 1, characterized in that: The treatment liquid is prepared by mixing phenolic resin liquid and epoxy resin liquid, wherein the mass ratio of the phenolic resin liquid to the epoxy resin liquid is 3:

1.

4. The resin grinding wheel based on glass fiber and carbon fiber composite material according to claim 1, characterized in that: The length of the chopped carbon fiber is 1-2 mm, and the diameter is 5-10 μm; the length of the chopped glass fiber is 1.5-2 mm, and the diameter is 5-10 μm.

5. A method for preparing a resin grinding wheel based on a glass fiber and carbon fiber composite material, characterized in that: The specific preparation method is as follows: S1. Weigh each raw material according to the weight ratio; S2, SG abrasive, chrome corundum abrasive and white corundum abrasive are mixed to obtain an abrasive mixture, and the abrasive mixture is added to the resin liquid for soaking, short carbon fiber short glass fiber is mixed with phenolic resin powder and polytetrafluoroethylene powder, and then the mixture is added to the soaked abrasive mixture, mixed evenly, and then cryolite and tool steel powder are added in sequence and mixed evenly; S3, putting the mixed material obtained in step S2 into a vibrating screen for screening twice, and the particles obtained by screening through the screen are used as molding materials for standby use; S4, first put a reinforcing mesh into the forming mold, then weigh a suitable weight of the forming material, put it into the forming mold and flatten it, and put another reinforcing mesh, then add the remaining suitable weight of the forming material into the forming mold and flatten it, and then press and form it to obtain a grinding wheel blank; the reinforcing mesh is made by a flat plus twisted belt binding weaving method; S5, take out the grinding wheel blank, and put it into the oven, raise the temperature in the oven to 160-175°C and keep it warm for 6-8h, then cool it naturally to room temperature, and take it out to obtain the finished product; S6. Pack and store the finished resin grinding wheels that have passed the inspection.

6. The method for preparing a resin grinding wheel based on a glass fiber and carbon fiber composite material according to claim 5, characterized in that: The mesh size of the vibrating screen is 10-16 mesh.

7. The method for preparing a resin grinding wheel based on a glass fiber and carbon fiber composite material according to claim 5, characterized in that: In the step S5, the temperature of the oven is increased from room temperature at a heating rate of 0.5°C / min.

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