Precise brush wheel for grinding automobile clutch separator and preparation method thereof

Abstract

The invention belongs to the technical field of grinding materials, and particularly discloses a precise brush wheel for grinding an automobile clutch separator and a preparation method thereof.The precise brush wheel comprises a supporting pipe, sponge wrapping the surface of the supporting pipe, rubber wrapping the surface of the sponge and a grinding sheet wrapping the surface of the rubber; the grinding sheet is prepared from the following raw material components: 11 to 30 parts of epoxy resin, 16 to 25 parts of phenolic resin, 5 to 8 parts of diluent, 0.6 to 1.2 parts of water glass, 0.4 to 0.8 part of pigment and 43 to 76 parts of grinding material. According to the precise brush wheel for grinding the automobile clutch separator, the automobile clutch separator can be continuously machined, meanwhile, the grinding precision better than that of a grinding wheel and an abrasive belt can be achieved, the grinding cutting force is higher, grinding is uniform, and the grinding efficiency is higher; the grinding tool is suitable for devices such as clutch separators with special requirements for roughness and grinding cutting force.

Description

Technical Field

[0001] The invention relates to the technical field of grinding materials, and in particular to a precision brush wheel for grinding a separation plate of an automobile clutch and a preparation method thereof. Background Art

[0002] The clutch is a key component in the automobile transmission system. Its function is to cut off and transmit the power of the engine to the transmission system, ensure the smooth start of the car, smooth gear shifting, and prevent the transmission system from overloading. The plate clutch separator has been widely used in modern automobiles due to its large torque capacity, easy operation, good balance and other advantages. The existing clutch separator grinding equipment is complicated to operate. Generally, a CBN disc surface grinder is used for single-sided grinding wheel planetary grinding. The number of materials discharged each time is limited to no more than 12 parts, and additional turning over grinding is required, which is inefficient and costly. In addition, under the action of friction during braking, the surface temperature of the clutch face plate will rise instantly, resulting in the decline of the friction performance of the clutch face plate and a lower service life. In addition, abrasive belts are also used for grinding clutch separators. Usually, a single-sided abrasive belt machine is used for grinding. The abrasive belt has a short life, generally about 600 times, and the grinding is uneven, resulting in frequent replacement of the abrasive belt and inability to operate continuously.

[0003] Ceramic brush wheels not only have a faster chip cutting speed, but also keep the surface of the device smooth and flat. The cylindrical shape and the heat dissipation brought by the grooves enable it to have the ability to process continuously for a long time. It is an ideal grinding tool for flat devices. It has unique advantages for devices such as clutch separators that require working conditions such as high load, high linear speed, large feed rate and continuous grinding. However, conventional large ceramic brush wheels will cause problems such as waste of grinding force and uneven force when grinding such small-area products. The grinding of hard metals is limited by life. Therefore, it is necessary to select special binders according to the characteristics of the clutch separator and adjust the specifications of the precision brush wheel according to its size. Automobile clutch separators usually need to have a high and stable friction coefficient and good wear resistance. Conventional ceramic brush wheels are currently mostly used for grinding thin flat electronic devices due to their material properties and structural characteristics. Ceramic brush wheels with conventional structures and materials have weak grinding capabilities for hard equipment such as clutch separators. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention provides a precision brush wheel for grinding a separation plate of an automobile clutch and a preparation method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problem is: The present invention provides a precision brush wheel for grinding a clutch separator of an automobile, comprising a support tube, a sponge coated on the surface of the support tube, a rubber coated on the surface of the sponge, and a grinding sheet coated on the surface of the rubber. The raw materials for making the grinding sheet include the following components in parts by weight: 11-30 parts of epoxy resin, 16-25 parts of phenolic resin, 5-8 parts of diluent, 0.6-1.2 parts of water glass, 0.4-0.8 parts of pigment and 43-76 parts of abrasive.

[0006] As a further embodiment, the pigment is one or more of chromium oxide green, iron oxide, chromium oxide, manganese oxide, such as lead chromate, and cobalt oxide.

[0007] As a further solution, the abrasive is one or more of diamond, cubic boron nitride, green silicon carbide, white corundum, brown corundum, zirconium corundum, and aluminum oxide.

[0008] As a further embodiment, the diluent is water.

[0009] The present invention also provides a method for preparing a precision brush wheel for grinding a clutch separator of an automobile. The method is used to prepare the above-mentioned precision brush wheel for grinding a clutch separator of an automobile. The method comprises the following steps: 1) Put phenolic resin and diluent into a container, then place the container in a water bath at 50-70°C, and stir with a stirrer at a speed of 120-130r / min for 5 minutes to obtain a phenolic resin solution; 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 120r / min to 140r / min, and stir for 5 to 15 minutes to mix them evenly; 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 120r~140r / min, stir for 5~15 minutes to mix them evenly, and obtain a mixture; 4) Pour the mixture in 3) into a double-layer vibrating screen, vibrate the screened material repeatedly twice, put the screened material into the mold, gently scrape the screened material inside the mold, press the upper cover of the mold into place with a pressure of 30T, and lock the upper cover and the mold with screws; by cold pressing (at room temperature, as opposed to heating pressing) the screened material with pressure, the grinding sheet is pre-prepared, so that the raw materials are tightly combined together, reducing the number of uneven pores and defects in the structure.

[0010] 5) Place the mold locked in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, then open it and take out the abrasive sheet; 6) The grinding sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the grinding sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the grinding sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the overall shape of the brush wheel is trimmed to obtain a precision brush wheel for grinding the automobile clutch separator.

[0011] The present invention has at least one of the following beneficial effects: (1) The precision brush wheel for grinding the automobile clutch separator prepared by the present invention enables the automobile clutch separator to be continuously processed while having better grinding accuracy than grinding wheels and grinding belts, stronger grinding cutting force, more uniform grinding and higher grinding efficiency, and is suitable for clutch separators, which have special requirements for roughness and grinding cutting force.

[0012] (2) A columnar precision brush wheel for grinding a clutch separator of an automobile, comprising a support tube, a sponge coated on the surface of the support tube, a rubber coated on the surface of the sponge, and a grinding sheet coated on the surface of the rubber. The sponge is elastic, and the grinding sheet can be cushioned during grinding, so that continuous grinding can be performed. Therefore, the life of the brush wheel can reach 16,000 times.

[0013] (3) The cold pressing method is used to pre-prepare the grinding sheet, so that the raw materials are tightly combined together, reducing the number of uneven pores and defects in the structure; the grinding sheet prepared by this process has a stable and dense structure, which improves the grinding life and enables it to have the strength to grind hard metals such as clutch separators. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0015] In the figure, 1-support tube, 2-sponge, 3-rubber, 4-abrasive sheet. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] It should be noted that in the following Examples 1-3 and Comparative Example 1, Figure 1 As shown, the precision brush wheel for grinding the automobile clutch separator is columnar, and the brush wheel includes a support tube 1, a sponge 2 coated on the surface of the support tube 1, a rubber 3 coated on the surface of the sponge 2, and a grinding sheet 4 coated on the surface of the rubber 3.

[0018] Example 1 The raw materials for the grinding sheet of the precision brush wheel for grinding the automobile clutch separator include the following components by weight: 11 parts of epoxy resin, 16 parts of phenolic resin, 5 parts of diluent, 0.6 parts of water glass, 0.4 parts of pigment and 76 parts of abrasive; The preparation method of the precision brush wheel for grinding the automobile clutch separator comprises the following steps: 1) Phenolic resin and diluent are placed in a container, and then the container is placed in a water bath at 60°C, and stirred with a stirrer at a speed of 125 r / min for 5 minutes to obtain a phenolic resin solution; wherein the diluent is water.

[0019] 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 130 r / min, and stir for 10 minutes to mix them evenly; wherein the abrasive is green silicon carbide.

[0020] 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 130 r / min, stir for 10 minutes to mix them evenly, and obtain a mixture; wherein the pigment is chromium oxide green.

[0021] 4) Pour the mixture in 3) into the double-layer vibrating screen. After vibrating the screened materials twice, put the screened materials into the mold, gently scrape the screened materials inside the mold flat, press the upper cover of the mold into place with a pressure of 30T, and lock the upper cover and the mold with screws; 5) Place the mold locked in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, then open it and take out the abrasive sheet; 6) The grinding sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the grinding sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the grinding sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the overall shape of the brush wheel is trimmed to obtain a precision brush wheel for grinding the automobile clutch separator.

[0022] Example 2 The raw materials for the grinding sheet of the precision brush wheel for grinding the automobile clutch separator include the following components by weight: 30 parts of epoxy resin, 25 parts of phenolic resin, 8 parts of diluent, 1.2 parts of water glass, 0.8 parts of pigment and 43 parts of abrasive; The preparation method of the precision brush wheel for grinding the automobile clutch separator comprises the following steps: 1) Phenolic resin and diluent are placed in a container, and then the container is placed in a water bath at 60°C, and stirred with a stirrer at a speed of 125 r / min for 5 minutes to obtain a phenolic resin solution; wherein the diluent is water.

[0023] 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 130 r / min, and stir for 10 minutes to mix them evenly; wherein the abrasive is cubic boron nitride (CBN).

[0024] 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 130 r / min, stir for 10 minutes to mix them evenly, and obtain a mixture; wherein the pigment is iron oxide.

[0025] 4) Pour the mixture in 3) into the double-layer vibrating screen. After vibrating the screened materials twice, put the screened materials into the mold, gently scrape the screened materials inside the mold flat, press the upper cover of the mold into place with a pressure of 30T, and lock the upper cover and the mold with screws; 5) Place the mold locked in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, then open it and take out the abrasive sheet; 6) The grinding sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the grinding sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the grinding sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the overall shape of the brush wheel is trimmed to obtain a precision brush wheel for grinding the automobile clutch separator.

[0026] Example 3 The raw materials for the grinding sheet of the precision brush wheel for grinding the automobile clutch separator include the following components by weight: 25 parts of epoxy resin, 20 parts of phenolic resin, 6.5 parts of diluent, 1 part of water glass, 0.6 parts of pigment and 56 parts of abrasive; The preparation method of the precision brush wheel for grinding the automobile clutch separator comprises the following steps: 1) Phenolic resin and diluent are placed in a container, and then the container is placed in a water bath at 60°C, and stirred with a stirrer at a speed of 125 r / min for 5 minutes to obtain a phenolic resin solution; wherein the diluent is water.

[0027] 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 130 r / min, and stir for 10 minutes to mix them evenly; wherein the abrasive is diamond.

[0028] 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 130r / min, stir for 10 minutes to mix them evenly, and obtain a mixture; wherein the pigment is manganese oxide.

[0029] 4) Pour the mixture in 3) into a double-layer vibrating screen. After vibrating the screened material twice, put the screened material into the mold, gently scrape the screened material inside the mold flat, press the upper cover of the mold into place with a pressure of 30T, and lock the upper cover and the mold with screws; 5) Place the mold locked in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, then open it and take out the abrasive sheet; 6) The grinding sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the grinding sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the grinding sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the overall shape of the brush wheel is trimmed to obtain a precision brush wheel for grinding the automobile clutch separator.

[0030] Comparative Example 1 The raw materials for the grinding sheet of the precision brush wheel for grinding the automobile clutch separator include the following components by weight: 11 parts of epoxy resin, 16 parts of phenolic resin, 5 parts of diluent, 0.6 parts of water glass, 0.4 parts of pigment and 76 parts of abrasive; The preparation method of the precision brush wheel for grinding the automobile clutch separator comprises the following steps: 1) Phenolic resin and diluent are placed in a container, and then the container is placed in a water bath at 60°C, and stirred with a stirrer at a speed of 125 r / min for 5 minutes to obtain a phenolic resin solution; wherein the diluent is water.

[0031] 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 130 r / min, and stir for 10 minutes to mix them evenly; wherein the abrasive is green silicon carbide.

[0032] 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 130 r / min, stir for 10 minutes to mix them evenly, and obtain a mixture; wherein the pigment is chromium oxide green.

[0033] 4) Pour the mixture in 3) into a double-layer vibrating screen, vibrate the screened material twice, put the screened material into the mold, gently scrape the screened material inside the mold, and let it stand for 3 hours; 5) Place the mold in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, and then take out the abrasive sheet; 6) The grinding sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the grinding sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the grinding sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the overall shape of the brush wheel is trimmed to obtain a precision brush wheel for grinding the automobile clutch separator.

[0034] Comparative Example 2 Comparative Example 2 provides a conventional 320# silicon carbide abrasive belt for grinding a clutch separator. The same grinding parameters are set during the grinding process for comparison.

[0035] Comparative Example 3 Comparative Example 3 provides a conventional 320# grinding wheel for grinding a clutch separator in a surface grinder.

[0036] The brush wheels of Examples 1-3, the brush wheel of Comparative Example 1, the abrasive belt of Comparative Example 2, and the abrasive wheel of Comparative Example 3 were tested for performance, and the automobile clutch separator was ground. The test items and results are shown in Table 1 below (Note: The life of the brush wheel depends on the life of the grinding sheet): It can be seen from the test data obtained from Example 1 and Comparative Example 1 that the porosity of the grinding sheet of Example 1 is less than that of Comparative Example 1, which further illustrates that the grinding sheet is pre-prepared by pressing the sieve material with a pressure of 30T, so that the raw materials are closely combined together, reducing the number of uneven pores and defects in the structure. At the same time, the density of the grinding sheet of Example 1 is higher than that of Comparative Example 1, which further illustrates that the grinding sheet pre-prepared by the cold pressing method has a more stable and dense structure, a larger contact area of ​​abrasive particles under high pressure during grinding, and an increase in overall strength, thereby increasing the grinding life, so that it has the strength to grind hard metals such as clutch separators.

[0037] It can be seen from the test data obtained from Examples 1-3 and Comparative Examples 2-3 that the brush wheel life of Examples 1-3 is longer than the sand belt of Comparative Example 2 and the grinding wheel of Comparative Example 3, indicating that the brush wheel of this solution includes a support tube, a sponge coated on the surface of the support tube, a rubber coated on the surface of the sponge, and a grinding sheet coated on the surface of the rubber. The sponge has elasticity, and the grinding sheet can be buffered during grinding, which significantly improves the service life of the brush wheel. In addition, the grinding force of the brush wheel of Examples 1-3 is significantly higher than the sand belt of Comparative Example 2 and the grinding wheel of Comparative Example 3, indicating that the brush wheel of this solution has a stronger grinding cutting force and a higher grinding efficiency, and is suitable for devices such as clutch separators that have special requirements for roughness and grinding cutting force.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A precision brush wheel for grinding a separation plate of an automobile clutch, characterized in that: The invention comprises a support tube, a sponge coated on the surface of the support tube, a rubber coated on the surface of the sponge, and an abrasive sheet coated on the surface of the rubber. The raw materials for making the abrasive sheet include the following components in parts by weight: 11-30 parts of epoxy resin, 16-25 parts of phenolic resin, 5-8 parts of diluent, 0.6-1.2 parts of water glass, 0.4-0.8 parts of pigment and 43-76 parts of abrasive.

2. A precision brush wheel for grinding a clutch separator of an automobile according to claim 1, characterized in that: The pigment is one or more of chromium oxide green, iron oxide, chromium oxide, manganese oxide, such as lead chromate, and cobalt oxide.

3. The precision brush wheel for grinding a clutch separator of an automobile according to claim 1, characterized in that: The abrasive is one or more of diamond, cubic boron nitride, green silicon carbide, white corundum, brown corundum, zirconium corundum and aluminum oxide.

4. The precision brush wheel for grinding a clutch separator of an automobile according to claim 1, characterized in that: The diluent used is water.

5. A method for preparing a precision brush wheel for grinding a clutch separator of an automobile, characterized in that: The preparation method is used to prepare a precision brush wheel for grinding a clutch separator of an automobile according to any one of claims 1 to 4, and the preparation method comprises the following steps: 1) Put phenolic resin and diluent into a container, then place the container in a water bath at 50-70°C, and stir with a stirrer at a speed of 120-130r / min for 5 minutes to obtain a phenolic resin solution; 2) Add the phenolic resin solution and abrasive obtained in step 1) into a mixer, adjust the mixer speed to 120r / min to 140r / min, and stir for 5 to 15 minutes to mix them evenly; 3) Add epoxy resin, water glass and pigment into the above mixer in sequence, adjust the mixer speed to 120r~140r / min, stir for 5~15 minutes to mix them evenly, and obtain a mixture; 4) Pour the mixture in 3) into a double-layer vibrating screen. After vibrating the screened material twice, put the screened material into the mold, gently scrape the screened material inside the mold flat, press the upper cover of the mold into place with a pressure of 30T, and lock the upper cover and the mold with screws; 5) Place the mold locked in 4) in an oven, first bake it continuously at 125°C for 6 hours, then bake it at 150°C for 3 hours; open the oven, cool the mold for 2 hours, then open it and take out the abrasive sheet; 6) The abrasive sheet obtained in 5) is bonded with the rubber glue after brushing. After the glue is cured, the abrasive sheet is cut into square particles horizontally and vertically by a grinding and cutting machine; the sponge is wound on the outer surface of the support tube, and the glue is brushed on the outer surface of the sponge, and the rubber that has been cured with the abrasive sheet is wound and bonded to the outer surface of the sponge. After the glue is cured, the appearance of the entire brush wheel is trimmed to obtain a precision brush wheel for grinding a clutch separator of an automobile.

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