A cast resin grinding wheel for grinding titanium alloy materials and a method for manufacturing the same

Abstract

The present application belongs to the technical field of resin grinding wheel preparation, and particularly relates to a cast molding resin grinding wheel for grinding titanium alloy material and a preparation method thereof. The resin grinding wheel is prepared from 40-60 parts of high-strength and high-toughness resin bond, 30-50 parts of abrasive and 10-30 parts of auxiliary material. The high-strength and high-toughness resin bond is prepared from 32-53 parts of strength-modified resin A, 40-62 parts of toughness-modified resin B, 5-8 parts of diluent and 1-2 parts of curing agent. The preparation method comprises high-strength and high-toughness resin bond preparation, uniform mixing of components, cast molding, heating and curing and precision machining. The cast molding process is carried out by using an integral device as a preparation tool. The preparation tool comprises a main frame, a charging barrel with an electromagnetic valve connected to the main frame and a rotating platform connected to the bottom of the main frame. The two modified resins are mixed and matched to obtain a resin bond with both strength and toughness. The cast molding process and equipment are used to obtain a grinding wheel product with large pores and high porosity.

Description

Technical Field

[0001] This invention belongs to the field of resin grinding wheel preparation technology, specifically relating to a cast resin grinding wheel for grinding titanium alloy materials and its preparation method. Background Technology

[0002] Titanium alloys refer to various alloy metals made of titanium and other metals. Titanium alloys possess advantages such as high specific strength, light weight, good toughness, good corrosion resistance, and high heat resistance, and are widely used in aerospace, automotive, chemical, and pharmaceutical industries. However, due to their high chemical reactivity, low elastic modulus, and low thermal conductivity, titanium alloys can cause the following problems during grinding: 1. The low thermal conductivity means that the large amount of heat generated during grinding cannot be transferred to the interior in time, leading to surface burns and deformation; 2. The high chemical reactivity causes a large amount of grinding debris to adhere to the surface of the titanium alloy during grinding. This debris, through continuous contact with the grinding wheel, is transferred to the working layer of the grinding wheel, clogging the pores and reducing the cutting force. This reduced cutting force, in turn, causes the temperature in the grinding area where the grinding wheel contacts the titanium alloy to rise. At high temperatures, the resin binder's ability to hold the abrasive grains is greatly weakened, making the abrasive grains more prone to detachment and significantly reducing the grinding wheel's lifespan.

[0003] Currently, grinding wheels on the market for titanium alloys are either high in strength but poor in toughness, or good in toughness but low in strength. High-strength, low-toughness grinding wheels do not adapt their working layer to the plastic deformation of the titanium alloy surface during high-speed grinding, resulting in poor surface quality and a large surface roughness. Low-strength, high-toughness grinding wheels, on the other hand, have weak bonding force on the abrasive grains during high-speed grinding, poor shape retention, and rapid abrasive grain shedding, leading to a short service life. Summary of the Invention

[0004] The purpose of this invention is to manufacture a grinding wheel with improved strength and toughness, large porosity and high porosity, which can perform high-efficiency and high-precision grinding on titanium alloy materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A resin-cast grinding wheel for grinding titanium alloy materials is made of the following components in parts by weight: 40-60 parts of high-strength and high-toughness resin binder, 30-50 parts of abrasive, and 10-30 parts of auxiliary materials; wherein the high-strength and high-toughness resin binder is made of the following components in parts by weight: 32-53 parts of strength-modified resin A, 40-62 parts of toughness-modified resin B, 5-8 parts of diluent, and 1-2 parts of curing agent.

[0006] Preferably, resin A is one or a combination of polyvinyl butyral modified phenolic resin, nitrile rubber modified phenolic resin, and polyurethane modified phenolic resin.

[0007] Preferably, the resin B is one or a combination of polyurethane modified epoxy resin, graphene oxide modified epoxy resin, and glass fiber modified epoxy resin.

[0008] Preferably, the abrasive is a mixture of diamond and silicon carbide, with a particle size range of 400-800#.

[0009] Preferably, the excipients are one or a combination of zinc oxide, cerium oxide, chromium trioxide, ferric oxide, graphite, and calcium carbonate, as well as a pore-forming agent.

[0010] Preferably, the curing agent is any one of aliphatic amine curing agents, acid anhydride curing agents, and dicyandiamide curing agents.

[0011] Preferably, the diluent is one or a combination of anhydrous ethanol, cyclohexane, dibutyl phthalate, and propylene glycol methyl ether.

[0012] A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh resin A, resin B and diluent according to the proportion, stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min, then add curing agent, stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min to prepare a high-strength and high-toughness resin binder. b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and then add the abrasive and various auxiliary materials weighed in proportion into the mixing tank in sequence. Stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min until the resin and powder are mixed evenly. c. Transfer the well-mixed liquid slurry from step b to the loading tank. Place the prepared mold on the rotating platform, turn on the power switch and adjust the speed control knob to 40-60 r / min. Then, start the solenoid valve at the bottom of the loading tank. Under the action of gravity, the liquid slurry in the loading tank is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve and then place the mold in the mold transfer area. The casting and molding step is complete. d. The molds in the mold transfer area in step c are transferred into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours. e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0013] A tool for preparing resin-cast grinding wheels for grinding titanium alloy materials, used in the resin grinding wheel casting process, includes a main frame, a loading tank connected to a lifting structure of the main frame, and a rotating platform connected to the bottom surface of the main frame, with the rotating platform positioned directly below the loading tank. A main frame control panel is also provided on the main frame. The loading tank has a funnel-shaped structure, with an electromagnetic valve at its outlet, electrically connected to the main frame control panel. The loading tank is connected to the lifting structure of the main frame, which is electrically connected to the main frame control panel. A mold is positioned at the center of the rotating platform, and a variable frequency motor is positioned directly below the mold, electrically connected to the rotating platform control panel, which in turn is electrically connected to the main frame control panel.

[0014] The beneficial effects of this invention are as follows: 1. This invention obtains a resin binder with both strength and toughness by mixing two modified resins in a specific ratio. Resin A has the strength modification characteristics of increasing compressive strength by 2-22 MPa and Rockwell hardness HRA by 4-21, while Resin B has the toughness modification characteristics of increasing flexural strength by 2-23 MPa. The high-strength and high-toughness resin binder used to prepare resin grinding wheels can ensure high surface quality and long service life of the grinding wheels, and meet the grinding requirements of titanium alloy materials.

[0015] 2. This invention, through casting molding process and tools, obtains a grinding wheel microstructure with large porosity and high porosity. The large porosity allows the grinding wheel to retain more grinding debris and coolant during the grinding of titanium alloys. During grinding, the large amount of coolant filling the large pores can both carry away the grinding debris and effectively reduce the temperature in the grinding zone. The high porosity improves the sharpness of the grinding wheel, enabling it to perform grinding processes on titanium alloy materials with a large amount of material removal.

[0016] 3. The preparation tool used for casting in this invention is an integrated device. The operation of each part is controlled by the main frame control panel. The drop distance between the material bucket and the mold and the rotation speed of the mold can be adjusted so that the slurry falling into the mold has abundant and uniform pores, which is conducive to the formation of a grinding wheel structure with large pores and high porosity. Attached Figure Description

[0017] Figure 1 This is an equipment diagram of the resin grinding wheel casting process in this invention; The diagram shows: 1-High-strength and high-toughness resin binder, 2-Abrasive, 3-Pore, 4-Filling bucket, 5-Solenoid valve, 6-Mold, 7-Rotating platform, 8-Rotating platform control panel, 9-Speed ​​adjustment knob, 10-Power switch, 11-Variable frequency motor, 12-Main frame control panel, 13-Timer device, 14-Automatic / Manual knob, 15-Valve open button, 16-Valve close button, 17-Jog lower button, 18-Jog raise button, 19-Emergency stop button, 20-Power button. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings.

[0019] This invention discloses a cast resin grinding wheel for grinding titanium alloy materials, which is made of the following components in parts by weight: 40-60 parts of high-strength and high-toughness resin binder, 30-50 parts of abrasive, and 10-30 parts of auxiliary materials; wherein the high-strength and high-toughness resin binder is made of the following components in parts by weight: 32-53 parts of strength-modified resin A, 40-62 parts of toughness-modified resin B, 5-8 parts of diluent, and 1-2 parts of curing agent.

[0020] To ensure the quality of resin grinding wheels, the components are carefully selected: Resin A is one or a combination of polyvinyl butyral modified phenolic resin, nitrile rubber modified phenolic resin, and polyurethane modified phenolic resin.

[0021] Resin B is one or a combination of polyurethane-modified epoxy resin, graphene oxide-modified epoxy resin, and glass fiber-modified epoxy resin.

[0022] The abrasive is a mixture of diamond and silicon carbide, with a particle size range of 400-800#.

[0023] The auxiliary materials are one or a combination of zinc oxide, cerium oxide, chromium trioxide, ferric oxide, graphite, and calcium carbonate, as well as a pore-forming agent.

[0024] The curing agent is any one of aliphatic amine curing agents, acid anhydride curing agents, or dicyandiamide curing agents.

[0025] The diluent is one or a combination of anhydrous ethanol, cyclohexane, dibutyl phthalate, and propylene glycol methyl ether.

[0026] This invention also relates to a tool for preparing resin-cast grinding wheels for grinding titanium alloy materials, used in the resin-casting process, such as... Figure 1As shown, it includes a main frame platform, a loading hopper 4 connected to the lifting structure of the main frame platform, and a rotating platform 7 connected to the bottom table surface of the main frame platform, with the rotating platform 7 located directly below the loading hopper 4; the main frame platform also has a main frame platform control panel 12 for controlling lifting and discharging.

[0027] The loading hopper 4 has a funnel-shaped structure, and its discharge port is equipped with an electromagnetic valve 5. The electromagnetic valve 5 is electrically connected to the main frame control panel 12, and the material discharge is controlled by the valve opening key 15, the valve closing key 16 and the timer device 13 on the main frame control panel 12. The loading hopper 4 is connected to the lifting structure of the main frame, and the lifting structure is electrically connected to the main frame control panel 12, and the lifting is controlled by the jog lowering key 17, the jog raising key 18 and the emergency stop key 19 on the main frame control panel 12.

[0028] The main frame control panel 12 also has an automatic / manual button 14 and a power button 20; the main frame control panel 12 is electrically connected to the power supply equipment and controls the power supply of the main frame through the power button 20.

[0029] The rotating platform 7 has a mold 6 at its center and a variable frequency motor 11 directly below the mold 6. The variable frequency motor 11 is electrically connected to the rotating platform control panel 8 and is used to drive the mold 6 to rotate. The rotating platform control panel 8 has a speed adjustment knob 9 and a power switch 10 for controlling the operation of the variable frequency motor 11 and the rotating platform. The rotating platform control panel 8 is electrically connected to the main frame control panel 12.

[0030] Example 1 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 80g of polyvinyl butyral modified phenolic resin, 96g of polyurethane modified epoxy resin, and 10g of dibutyl phthalate. Stir with a stirrer for 20 minutes at a stirring speed of 600r / min. Then add 2.0g of aliphatic amine curing agent DETA and stir with a stirrer for 30 minutes at a stirring speed of 600r / min to prepare a high-strength and high-toughness resin binder.

[0031] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 20g of diamond with a particle size of 600#, 135g of silicon carbide with a particle size of 800#, 20g of zinc oxide, 9g of graphite, 10g of calcium carbonate, and 5g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0032] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to a rotation speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0033] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0034] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0035] Example 2 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 60g of polyurethane modified phenolic resin, 116g of glass fiber modified epoxy resin, and 10g of propylene glycol methyl ether. Stir with a stirrer for 20 minutes at a stirring speed of 600r / min. Then add 1.9g of methylhexahydrophthalic anhydride curing agent and stir with a stirrer for 30 minutes at a stirring speed of 600r / min to prepare a high-strength and high-toughness resin binder.

[0036] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 12g of diamond with a particle size of 600#, 143g of silicon carbide with a particle size of 800#, 10g of ferric oxide, 10g of chromium oxide, 10g of graphite, 12g of calcium carbonate, and 2g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0037] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0038] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0039] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0040] Example 3 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 100g of nitrile rubber modified phenolic resin, 76g of graphene oxide modified epoxy resin, and 15g of cyclohexane. Stir with a stirrer for 20min at a stirring speed of 600r / min. Then add 3g of dicyandiamide as curing agent and stir with a stirrer for 30min at a stirring speed of 600r / min to prepare a high-strength and high-toughness resin binder.

[0041] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 10g of diamond with a particle size of 400#, 145g of silicon carbide with a particle size of 600#, 20g of cerium oxide, 9g of graphite, 10g of calcium carbonate, and 5g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0042] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0043] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0044] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0045] Example 4 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 38g of polyvinyl butyral modified phenolic resin, 20g of polyurethane modified phenolic resin, 70g of glass fiber modified epoxy resin, 5g of anhydrous ethanol, and 2g of propylene glycol methyl ether. Stir with a stirrer for 20 minutes at a stirring speed of 600 rpm. Then add 2.0g of aliphatic amine curing agent DETA and stir with a stirrer for 30 minutes at a stirring speed of 600 rpm to prepare a high-strength and high-toughness resin binder.

[0046] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 45g of diamond with a particle size of 600#, 125g of silicon carbide with a particle size of 800#, 10g of ferric oxide, 7g of chromium oxide, 10g of graphite, and 5g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0047] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0048] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0049] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0050] Example 5 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 125g of nitrile rubber modified phenolic resin, 85g of polyurethane modified epoxy resin, 65g of graphene oxide modified epoxy resin, and 16g of propylene glycol methyl ether. Stir with a stirrer for 20 minutes at a stirring speed of 600 r / min. Then add 3.0g of dicyandiamide as a curing agent and stir with a stirrer for 30 minutes at a stirring speed of 600 r / min to prepare a high-strength and high-toughness resin binder.

[0051] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 40g of diamond with a particle size of 400#, 104g of silicon carbide with a particle size of 600#, 20g of cerium oxide, 8g of zinc oxide, 5g of chromium trioxide, 10g of calcium carbonate, and 5g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0052] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0053] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0054] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0055] Example 6 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 30g of nitrile rubber modified phenolic resin, 38g of polyurethane modified phenolic resin, 55g of graphene oxide modified epoxy resin, 27g of glass fiber modified epoxy resin, and 9g of dibutyl phthalate. Stir with a stirrer for 20 minutes at a stirring speed of 600 rpm. Then add 2.0g of curing agent DETA and stir with a stirrer for 30 minutes at a stirring speed of 600 rpm to prepare a high-strength and high-toughness resin binder.

[0056] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 30g of diamond with a particle size of 600#, 90g of silicon carbide with a particle size of 800#, 30g of ferric oxide, 30g of chromium oxide, 23g of graphite, 22g of calcium carbonate, and 15g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0057] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0058] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0059] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0060] Example 7 A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials includes the following steps: a. Weigh 80g of polyvinyl butyral modified phenolic resin, 96g of polyurethane modified epoxy resin, 10g of anhydrous ethanol, and 5g of cyclohexane. Stir with a stirrer for 20 minutes at a speed of 600 rpm. Then add 2.0g of aliphatic amine curing agent DETA and stir with a stirrer for 30 minutes at a speed of 600 rpm to prepare a high-strength and high-toughness resin binder.

[0061] b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and weigh out 20g of diamond with a particle size of 600#, 135g of silicon carbide with a particle size of 800#, 20g of zinc oxide, 9g of graphite, 10g of calcium carbonate, and 5g of pore-forming agent in sequence. Add them to the mixing tank and stir with a stirrer for 30 minutes at a stirring speed of 800r / min until the resin and powder are mixed evenly.

[0062] c. Transfer the uniformly mixed liquid slurry from step b to the loading tank 4, and adjust the height of the loading tank 4; place the prepared mold on the rotating platform 7, turn on the power switch 10, and the rotating platform will start rotating. Adjust the speed control knob 9 to the rotating platform speed of 60 r / min; then press the valve opening button 15 to open the solenoid valve 5 at the bottom of the loading tank 4. Under the action of gravity, the liquid slurry in the loading tank 4 is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve 5, and then transfer the mold and place it in the mold transfer area. The solenoid valve 5 of the loading tank 4 is controlled by the timer device 13, which opens and closes once every 15 seconds. Pressing the valve closing button 16 stops the solenoid valve 5 from working.

[0063] d. Transfer the mold from the mold transfer area in step c into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours.

[0064] e. The cured grinding wheel blank from step d is machined to the required grinding wheel dimensional accuracy using a CNC lathe.

[0065] Experimental Example Grinding tests were conducted on titanium alloy materials using Examples 1 to 7 above and commercially available grinding wheels. The results are shown in the table below: The resin grinding wheel prepared by this invention for grinding titanium alloy materials has high hardness, good toughness, and high porosity. When grinding titanium alloy materials, the single grinding amount of the workpiece reaches 0.01-0.015mm, the surface roughness of the workpiece Ra is between 0.05-0.08μm, and the workpiece surface is free of scratches, vibration marks, and burns. The grinding wheel has stable performance, good durability, and long service life during the grinding process.

Claims

1. A cast resin grinding wheel for grinding titanium alloy materials, characterized in that, It is made from the following components in parts by weight: 40-60 parts of high-strength and high-toughness resin binder, 30-50 parts of abrasive, and 10-30 parts of auxiliary materials; the high-strength and high-toughness resin binder is made from the following components in parts by weight: 32-53 parts of strength-modified resin A, 40-62 parts of toughness-modified resin B, 5-8 parts of diluent, and 1-2 parts of curing agent; the resin A is one or a combination of polyvinyl butyral-modified phenolic resin, nitrile rubber-modified phenolic resin, and polyurethane-modified phenolic resin; the resin B is one or a combination of polyurethane-modified epoxy resin, graphene oxide-modified epoxy resin, and glass fiber-modified epoxy resin; the abrasive is a mixture of diamond and silicon carbide with a particle size range of 400-800#; the auxiliary materials are one or a combination of zinc oxide, cerium oxide, chromium trioxide, ferric oxide, graphite, and calcium carbonate, as well as a pore-forming agent.

2. The resin-cast grinding wheel for grinding titanium alloy materials according to claim 1, characterized in that, The curing agent is any one of aliphatic amine curing agents, acid anhydride curing agents, and dicyandiamide curing agents.

3. The resin-cast grinding wheel for grinding titanium alloy materials according to claim 1, characterized in that, The diluent is one or a combination of anhydrous ethanol, cyclohexane, dibutyl phthalate, and propylene glycol methyl ether.

4. A method for preparing a resin-cast grinding wheel for grinding titanium alloy materials according to any one of claims 1 to 3, characterized in that, Includes the following steps: a. Weigh resin A, resin B and diluent according to the proportion, stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min, then add curing agent, stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min to prepare a high-strength and high-toughness resin binder. b. Pour the high-strength and high-toughness resin binder prepared in step a into a mixing tank, and then add the abrasive and various auxiliary materials weighed in proportion into the mixing tank in sequence. Stir with a stirrer for 20-30 minutes at a stirring speed of 600-800 r / min until the resin and powder are mixed evenly. c. Transfer the well-mixed liquid slurry from step b to the loading tank. Place the prepared mold on the rotating platform, turn on the power switch and adjust the speed control knob to 40-60 r / min. Then, start the solenoid valve at the bottom of the loading tank. Under the action of gravity, the liquid slurry in the loading tank is poured into the continuously rotating mold. After the liquid slurry in the mold reaches the predetermined height, close the solenoid valve and then place the mold in the mold transfer area. The casting and molding step is complete. d. The molds in the mold transfer area in step c are transferred into the oven for curing. Curing process: 40-60℃ for 4 hours, 70-90℃ for 4 hours, 100-120℃ for 3 hours, and 130-150℃ for 6 hours. e. The cured grinding wheel blank from step d is machined to the required dimensional accuracy using a CNC lathe; Step c is the resin grinding wheel casting process, in which the entire equipment is used as the preparation tool. The preparation tool includes a main frame, a loading barrel connected to the lifting structure of the main frame, and a rotating platform connected to the bottom surface of the main frame, with the rotating platform positioned directly below the loading barrel. The main frame also has a main frame control panel. The loading barrel has a funnel-shaped structure, and its outlet is equipped with an electromagnetic valve, which is electrically connected to the main frame control panel. The loading barrel is connected to the lifting structure of the main frame, and the lifting structure is electrically connected to the main frame control panel. A mold is located at the center of the rotating platform, and a variable frequency motor is located directly below the mold. The variable frequency motor is electrically connected to the rotating platform control panel, and the rotating platform control panel is electrically connected to the main frame control panel.

Images