High-precision track grinding wheel set and production process thereof

Abstract

The application belongs to the technical field of grinding wheel production, and particularly relates to a high-precision track grinding wheel set and a production process thereof, which comprises raw materials composed of the following components: abrasive, private bonding agent, adhesive, and filler, and comprises the following steps: S3, molding, placing a mold on a press through a transportation and taking mechanism, using the press to press the molding material in the mold into a grinding wheel blank with a required shape, and then transporting the mold after the molding material is pressed to a second roller conveyor through the transportation and taking mechanism. The high-precision track grinding wheel set and the production process thereof are convenient for transporting the mold with the molding material placed in the mold to a placing plate through the first roller conveyor, cooperating with the transportation and taking mechanism, transporting the mold to the press through the transportation and taking mechanism, and thus facilitating the press to press and mold the molding material in the mold, reducing the time wasted by manually transporting the mold, and thus improving the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of grinding wheel manufacturing technology, and in particular to a high-precision orbital grinding wheel set and its manufacturing process. Background Technology

[0002] Grinding wheels, also known as bonded abrasives, are abrasive tools in which ordinary abrasive grains are bonded together with a bonding agent to form a specific shape (mostly circular with a central through-hole) and possess a certain strength. They generally consist of abrasive grains, a bonding agent, and pores; these three parts are often referred to as the three essential elements of bonded abrasives. According to different bonding agents, common types include ceramic (bonded) grinding wheels, resin (bonded) grinding wheels, and rubber (bonded) grinding wheels. Grinding wheels are the most widely used and extensive type of abrasive tool. They rotate at high speeds and can perform rough grinding, semi-finishing, and finish grinding, as well as grooving and cutting, on the outer and inner diameters, planes, and various profiles of metal or non-metal workpieces.

[0003] Rail grinding often employs grinding locomotives, and the grinding wheels used on these locomotives are known as rail grinding wheel sets. Rail grinding wheel sets are specialized grinding tools with extremely high performance requirements. During grinding, the end face of the grinding wheel is used for vibratory grinding, and the vertical pressure is hydraulically adjusted. Therefore, the grinding wheel bears a very heavy load, and since this is an outdoor operation, the grinding wheel needs to possess characteristics such as high strength, good wear resistance, high grinding ratio, and good weather resistance. In particular, the abrasive used in the grinding wheel must have a dense structure and good thermophysical properties, and a high-strength, wear-resistant bonding agent must be selected. This ensures that the grinding wheel can withstand the heavy-duty, high-vibration grinding and meet the requirements of rail grinding.

[0004] Chinese patent application CN104290043B discloses a rail grinding wheel and its preparation method. The grinding wheel includes a base and a grinding body. The base has a mounting hole at its center and several through holes around the mounting hole. A first sidewall, a second sidewall, and a third sidewall are coaxially arranged around the mounting hole on the front side of the base. Grooves are formed between the first and second sidewalls and between the second and third sidewalls. The through holes are located in the grooves between the second and third sidewalls. One end of the grinding body has a protrusion that matches the grooves and through holes on the base. The grinding body and the base are connected by the protrusion and the groove. After pressing and hardening, the rail grinding wheel is obtained. The grinding body is composed of the following components in parts by weight: abrasive: 100 parts, phenolic resin liquid: 4-6 parts, phenolic resin powder: 10-13 parts, and filler: 15-30 parts. The rail grinding wheel of this invention has good overall performance, can withstand heavy-load, strong vibration grinding, and has high safety performance.

[0005] Regarding the aforementioned rail grinding wheels and their preparation methods, the inventors believe that in order to further improve the hardness and wear resistance of the grinding wheels, avoid excessive wear during use, and thus extend the service life of the grinding wheels, it is necessary to further adjust the formula raw materials. At the same time, when pressing the molding material in the mold, currently, most of the time, it is still necessary to have workers nearby to hold the mold and press it under the press to form the grinding wheel blank. After pressing, the mold is removed. Therefore, it is easy to cause safety hazards for workers during use, thereby affecting the production efficiency of grinding wheels. Summary of the Invention

[0006] Based on the aforementioned technical problems, this invention proposes a high-precision orbital grinding wheel set and its manufacturing process.

[0007] The present invention proposes a high-precision orbital grinding wheel set and its manufacturing process, which includes raw materials composed of the following components: abrasive, binder, adhesive, and filler.

[0008] Preferably, the abrasive is brown fused alumina, diamond, wear-resistant steel powder, or zirconium fused alumina, with the abrasive having a specific gravity ratio of 40%-50% brown fused alumina, 5%-15% wear-resistant steel powder, 20%-30% zirconium fused alumina, and the balance being diamond.

[0009] Through the above technical solution, a variety of abrasives, including brown fused alumina, diamond, wear-resistant steel powder, and zirconium fused alumina, are used in combination. By combining their respective advantages, the performance of the grinding wheel set is optimized to meet high-intensity grinding requirements. Zirconium fused alumina is produced by smelting alumina and zirconium oxide in an electric arc furnace at temperatures above 2000℃. It has high toughness, high strength, and good wear resistance, exhibiting extremely high grinding efficiency during heavy-load grinding of tracks. Brown fused alumina is a brownish-red synthetic corundum produced by melting and reducing bauxite, carbon materials, and iron filings in an electric arc furnace. As the most basic abrasive, diamond is widely used due to its good grinding performance, wide range of applications, and low price. Therefore, brown corundum is used to replace some zirconium corundum to reduce costs. Diamond is a mineral composed of carbon elements. It is a particle material composed of single elements in nature and is also the hardest substance in nature. Therefore, it has stable chemical properties and is resistant to acids and alkalis. In addition, wear-resistant steel powder has strong wear resistance. The combination of the two helps to improve the grinding efficiency of the grinding wheel set, and can also improve the strength, weather resistance, fatigue resistance and other properties of the grinding wheel set, and extend the service life of the grinding wheel set.

[0010] Preferably, the adhesive is boron phenolic resin and the bonding agent is epoxy resin.

[0011] Through the above technical solutions, boron phenolic resin has higher heat resistance, instantaneous high temperature resistance, heat oxidation resistance, and neutron radiation protection than ordinary phenolic resin. However, its curing speed is slow, which helps to ensure that the raw materials can react fully and keep them moist, making it easier to mold. Epoxy resin has excellent physical, mechanical, and electrical insulation properties, adhesion to various materials, and flexibility in its application process, which are not found in other thermosetting plastics. It has good adhesive strength and chemical resistance, which helps to tightly connect the raw materials together, thus facilitating extrusion molding.

[0012] Preferably, the filler is powdered cryolite, abrasive, dolomite, and silicon carbide powder. The specific gravity ratios of the abrasive are 30%-40% powdered cryolite, 30%-40% abrasive, 20%-30% dolomite, and the remainder is silicon carbide powder.

[0013] The abrasive is cerium oxide.

[0014] Through the above technical solution, the filler can simultaneously improve the performance of the grinding wheel and reduce costs. As a filler material for the abrasive, the filler works in conjunction with the abrasive to achieve a good filling effect. The main component of the filler, cryolite, has a low melting point, which reduces grinding heat, enhances self-sharpening properties, prevents grinding wheel clogging, and improves grinding wheel strength. Another main component, cerium oxide, is used for grinding and polishing. During use, the abrasive grains are in a free state, providing excellent lubrication and anti-wear properties, improving the machining accuracy of the grinding wheel set, effectively protecting the grinding wheel set, and extending its service life. Dolomite decomposes when heated to 700~900℃. Dolomite is a mixture of carbon dioxide, calcium oxide, and magnesium oxide. It readily reacts with water. When dolomite is calcined at 1500℃, magnesium oxide becomes periclase, and calcium oxide transforms into crystalline α-CaO. It has a dense structure, strong water resistance, and a refractoriness of up to 2300℃. It increases the hardness of the grinding wheel set, improves the friction and wear performance of the grinding wheel, and reduces costs. Silicon carbide has properties such as corrosion resistance, high temperature resistance, high strength, microhardness up to 2840-3320 kg / mm2, good thermal conductivity, and impact resistance. Adding an appropriate amount of silicon carbide not only helps to improve the grinding efficiency of the grinding wheel set, but also improves the strength and weather resistance of the grinding wheel set.

[0015] Preferably, the production process of the high-precision orbital grinding wheel set includes the following steps: S1, material preparation, weighing the required raw materials according to the formula requirements;

[0016] S2. Mixing: According to the process requirements, the abrasive and other raw materials are mixed in sequence and according to the time requirements to form a molding material, which is then loaded into the mold and transported to the next process by the first roller conveyor.

[0017] S3. Molding: The mold is placed on the press by the transport and pick-up mechanism. The press is used to press the molding material in the mold into the required shape of the grinding wheel blank. The mold after the molding material is pressed is then transported to the second roller conveyor by the transport and pick-up mechanism.

[0018] S4, Drying;

[0019] S5, firing;

[0020] S6. Machining: Use machine tools or grinding machines to process the outer circle, plane and hole diameter of the fired blank into finished products;

[0021] S7, Inspection;

[0022] S8. Packaging and warehousing.

[0023] Preferably, a limit switch is provided on the inner surface of the side plate of the first roller conveyor, and a telescopic lifting mechanism is provided on the inner surface of the side plate of the first roller conveyor. The telescopic lifting mechanism includes a support plate, and the upper surface of the support plate is fixedly connected to the lower surface of the side plate of the first roller conveyor on both sides. Two push cylinders are fixedly installed on the upper surface of the support plate, and a sliding plate is fixedly connected to one end of the piston rod of each of the two push cylinders. The inner surfaces of the two side plates of the first roller conveyor are respectively provided with sliding grooves, and the two sides of the sliding plate are slidably engaged with the inner wall of the sliding groove.

[0024] Through the above technical solution, the limit switch controls the operation of the first roller conveyor through the sensing mold, pushes the cylinder piston rod to extend and drives the slide plate to move along the slide groove on the support plate, thereby driving the slide plate to extend out of the first roller conveyor.

[0025] Preferably, a lower fixing plate is fixedly connected to the upper surface of the support plate, and a scissor frame is hinged to the surface of the lower fixing plate via a pin. An upper fixing plate is hinged to the upper end of the scissor frame via another pin. Limiting grooves are respectively formed on the surfaces of the upper fixing plate and the lower fixing plate. A sliding rod is slidably engaged with the inner wall of the limiting groove. The two ends of the sliding rod extend out of the limiting groove and are hinged to the two ends of the scissor frame. A first hydraulic cylinder is fixedly installed on the inner surface of the lower fixing plate. One end of the piston rod of the first hydraulic cylinder is fixedly connected to the surface of the sliding rod. A placement plate is fixedly connected to the upper surface of the upper fixing plate.

[0026] Through the above technical solution, the retraction of the piston rod of the first hydraulic cylinder drives the slide rod to move along the inner wall of the limiting groove, thereby driving the scissor frame to extend. The extension of the scissor frame drives the upper fixed plate to move up, which in turn drives the placement plate to move up until the placement plate is at the same level as the roller on the first roller conveyor.

[0027] Preferably, the transport and handling mechanism includes two mounting seats respectively installed on both sides of the press. Each of the two mounting seats has a groove on one side. The inner walls of the two grooves are respectively fitted with screws via bearings. A servo motor is fixedly installed on one side of each of the two mounting seats. One end of the output shaft of the servo motor extends into the groove and is fixedly sleeved with one end of the screw. A slider is threadedly connected to the outer surface of the screw, and the surface of the slider is slidably engaged with the inner wall of the groove.

[0028] Through the above technical solution, the rotation frequency and direction of the output shafts of the two servo motors are kept consistent, so that the rotation of the output shafts of the two servo motors drives the two screws to rotate synchronously, and the two sliders move in the same direction along the grooves on the screws.

[0029] Preferably, the slider extends to the surface outside the groove and has a through hole, and positioning plates are fixedly installed on both sides of the support of the press, with the outer surface of the positioning plate slidingly engaging with the inner wall of the through hole.

[0030] Through the above technical solution, the movement of the slider causes the perforation to slide along the surface of the positioning plate, thereby supporting the slider through the positioning plate.

[0031] Preferably, a second hydraulic cylinder is fixedly installed on the upper surface of the slider extending outside the groove, a connecting block is fixedly connected to one end of the piston rod of the second hydraulic cylinder, a third hydraulic cylinder is fixedly installed on the lower surface of the connecting block, and a vacuum suction cup is fixedly installed on one end of the piston rod of the third hydraulic cylinder through a connecting piece.

[0032] Through the above technical solution, the movement of the slider drives the second hydraulic cylinder, the connecting block, the third hydraulic cylinder and the vacuum suction cup to move synchronously. The extension and retraction of the piston rod of the second hydraulic cylinder drives the connecting block, the third hydraulic cylinder and the vacuum suction cup to move back and forth. The extension and retraction of the piston rod of the third hydraulic cylinder drives the vacuum suction cup to move up and down.

[0033] The beneficial effects of this invention are as follows:

[0034] 1. By adding diamond and wear-resistant steel powder, the hardness and wear resistance of the grinding wheel after production are further improved. Diamond is hard and chemically stable, which improves the strength and weather resistance of the grinding wheel, helps to improve the grinding efficiency of the grinding wheel set, and effectively extends the service life of the grinding wheel set.

[0035] 2. By setting up a telescopic lifting mechanism, the mold with the molded material placed on it can be transported to the placement plate by the first roller conveyor. Then, it can cooperate with the transport and pick-up mechanism to transport the mold to the press, so that the press can press the molded material in the mold to form it. This reduces the time wasted by manually transporting the mold and improves production efficiency.

[0036] 3. By setting up a transport and picking mechanism, the molds transported by the first roller conveyor can be automatically placed onto the press. After the molding material in the mold is extruded and shaped by the press, it is transported to the second roller conveyor for removal. This avoids the danger of direct contact between the operator and the press and improves production efficiency. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a high-precision orbital grinding wheel set and its manufacturing process proposed in this invention;

[0038] Figure 2 This is a three-dimensional view of the first roller conveyor structure of a high-precision track grinding wheel assembly and its manufacturing process proposed in this invention.

[0039] Figure 3 This is a three-dimensional view of the push cylinder structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention.

[0040] Figure 4 A perspective view of the slide plate structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention;

[0041] Figure 5 This is a perspective view of the first hydraulic cylinder structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention.

[0042] Figure 6 This is a perspective view of the mounting base structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention.

[0043] Figure 7 This is a three-dimensional view of the third hydraulic cylinder structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention.

[0044] Figure 8 This is a three-dimensional view of the positioning plate structure of a high-precision orbital grinding wheel set and its manufacturing process proposed in this invention;

[0045] Figure 9 This is a perspective view of the slider structure of a high-precision orbital grinding wheel assembly and its manufacturing process proposed in this invention.

[0046] In the diagram: 1. First roller conveyor; 11. Limit switch; 2. Support plate; 201. Push cylinder; 202. Slide plate; 203. Slide groove; 204. Lower fixed plate; 205. Scissor frame; 206. Upper fixed plate; 207. Limit groove; 208. Slide rod; 209. First hydraulic cylinder; 210. Placement plate; 3. Press; 4. Second roller conveyor; 5. Mounting base; 501. Groove; 502. Screw; 503. Servo motor; 504. Slider; 505. Perforation; 506. Positioning plate; 507. Second hydraulic cylinder; 508. Connecting block; 509. Third hydraulic cylinder; 510. Vacuum suction cup. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Reference Figure 1-9 A high-precision orbital grinding wheel set and its manufacturing process, comprising raw materials composed of the following components: abrasive, binder, adhesive, and filler.

[0049] The abrasive consists of brown fused alumina, diamond, wear-resistant steel powder, and zirconium fused alumina. The specific gravity ratios of the abrasives are 40%-50% brown fused alumina, 5%-15% wear-resistant steel powder, 20%-30% zirconium fused alumina, and the balance being diamond. By adding diamond and wear-resistant steel powder, the hardness and wear resistance of the grinding wheel after production are further improved. Diamond is hard and chemically stable, thereby improving the strength and weather resistance of the grinding wheel, which helps to improve the grinding efficiency of the grinding wheel set and effectively extend the service life of the grinding wheel set.

[0050] The binder is boron phenolic resin, and the adhesive is epoxy resin. Boron phenolic resin has higher heat resistance, better instantaneous high temperature resistance, better heat oxidation resistance, and better protection against neutron radiation than ordinary phenolic resin. However, its curing speed is slow, which helps to ensure that the raw materials can react fully and keep them moist, making it easier to mold. Epoxy resin has excellent physical, mechanical, and electrical insulation properties, adhesion to various materials, and flexibility in its application process, which are not found in other thermosetting plastics. It has good adhesive strength and chemical resistance, which helps to tightly connect the raw materials together, thus facilitating extrusion molding.

[0051] The filler consists of powdered cryolite, abrasive, dolomite, and silicon carbide powder, with the following weight proportions: 30%-40% cryolite, 30%-40% abrasive, 20%-30% dolomite, and the remainder being silicon carbide powder. The abrasive is cerium oxide. Cryolite, the main component of the filler, has a low melting point, which reduces grinding heat, enhances self-sharpening properties, prevents grinding wheel clogging, and improves grinding wheel strength. The other main component, cerium oxide, is used for grinding and polishing. During use, the abrasive grains are in a free state, providing excellent lubrication and anti-wear properties, improving the machining accuracy of the grinding wheel set, effectively protecting the grinding wheel set, and extending its service life. After calcination, dolomite has a dense structure, strong water resistance, and high refractoriness, which increases the hardness of the grinding wheel set, improves the friction and wear performance of the grinding wheel, and reduces costs. Silicon carbide has properties such as corrosion resistance, high temperature resistance, high strength, good thermal conductivity, and impact resistance. Adding an appropriate amount of silicon carbide not only helps to improve the grinding efficiency of the grinding wheel set but also improves the strength and weather resistance of the grinding wheel set.

[0052] The process includes the following steps: S1, Ingredient preparation: Weigh the required raw materials according to the formula requirements;

[0053] S2. Mixing: According to the process requirements, the abrasive and other raw materials are mixed in sequence and according to the time requirements to form a molding material, which is then loaded into the mold and transported to the next process by the first roller conveyor 1.

[0054] S3. Molding: The mold is placed on the press 3 by the transport and pick-up mechanism. The press 3 is used to press the molding material in the mold into the required shape of the grinding wheel blank. The mold after the molding material is pressed is then transported to the second roller conveyor 4 by the transport and pick-up mechanism.

[0055] S4, Drying;

[0056] S5, firing;

[0057] S6. Machining: Use machine tools or grinding machines to process the outer circle, plane and hole diameter of the fired blank into finished products;

[0058] S7, Inspection;

[0059] S8. Packaging and warehousing.

[0060] To facilitate the transport of molds containing molding materials, a first roller conveyor 1 is provided, and a limit switch 11 is installed on the first roller conveyor 1 to prevent the molds transported on the first roller conveyor 1 from falling off.

[0061] To support the mold transported by the first roller conveyor 1, a telescopic lifting mechanism is provided on the inner surface of the side plate of the first roller conveyor 1. The telescopic lifting mechanism includes a support plate 2. The upper surface of the support plate 2 is fixedly connected to the lower surface of the side plate of the first roller conveyor 1 on both sides. Two push cylinders 201 are fixedly installed on the upper surface of the support plate 2. One end of the piston rod of each of the two push cylinders 201 is fixedly connected to a slide plate 202. The inner surfaces of the two side plates of the first roller conveyor 1 are respectively provided with slide grooves 203. The two sides of the slide plate 202 are slidably engaged with the inner wall of the slide groove 203. The extension of the piston rod of the push cylinder 201 drives the slide plate 202 to move along the slide groove 203 on the support plate 2, thereby causing the slide plate 202 to extend out of the first roller conveyor 1 to prevent it from occupying space when not in use.

[0062] To facilitate the transport and handling mechanism in transporting the mold to the press 3, a lower fixed plate 204 is fixedly connected to the upper surface of the support plate 2. A scissor frame 205 is hinged to the surface of the lower fixed plate 204 via a pin. An upper fixed plate 206 is hinged to the upper end of the scissor frame 205 via another pin. Limiting grooves 207 are respectively formed on the surfaces of the upper fixed plate 206 and the lower fixed plate 204. A sliding rod 208 is slidably engaged with the inner wall of the limiting groove 207. The two ends of the sliding rod 208 extend out of the limiting groove 207 and are hinged to the two ends of the scissor frame 205. A first liquid is fixedly installed on the inner surface of the lower fixed plate 204. The piston rod of the first hydraulic cylinder 209 is fixedly connected to the surface of the slide rod 208. The upper surface of the upper fixed plate 206 is fixedly connected to the placement plate 210. The retraction of the piston rod of the first hydraulic cylinder 209 causes the slide rod 208 to move along the inner wall of the limiting groove 210, thereby causing the scissor frame 205 to extend. The extension of the scissor frame 205 causes the upper fixed plate 206 to move upward, which in turn causes the placement plate 210 to move upward until the placement plate 210 is at the same level as the roller on the first roller conveyor 1. At the same time, the retraction of the scissor frame 205 facilitates storage, thereby reducing the space occupied.

[0063] By setting up a telescopic lifting mechanism, the mold with the molded material placed on it can be transported to the placement plate 210 by the first roller conveyor 1. Then, it can cooperate with the transport and pick-up mechanism to transport the mold to the press 3, so that the press 3 can press the molded material in the mold to form, reduce the time wasted by manually transporting the mold, and thus improve production efficiency.

[0064] To automatically transport the mold to the press 3, the transport and pick-up mechanism includes two mounting seats 5 respectively installed on both sides of the press 3. Each mounting seat 5 has a groove 501 on one side. Screws 502 are mounted on the inner walls of the two grooves 501 via bearings. Servo motors 503 are fixedly mounted on one side of each mounting seat 5. One end of the output shaft of the servo motor 503 extends into the groove 501 and is fixedly sleeved with one end of the screw 502. A slider 504 is threaded onto the outer surface of the screw 502. The surface of the slider 504 slides against the inner wall of the groove 501. The rotation frequency and direction of the output shafts of the two servo motors 503 are consistent, so that the rotation of the output shafts of the two servo motors 503 drives the two screws 502 to rotate synchronously, and causes the two sliders 504 to move in the same direction along the grooves 501 on the screws 502.

[0065] In order to support the slider 504, a through hole 505 is provided on the surface of the slider 504 extending out of the groove 501. Positioning plates 506 are fixedly installed on both sides of the support of the press 3. The outer surface of the positioning plate 506 is slidably engaged with the inner wall of the through hole 505. The slider 504 moves through the through hole 505 and moves on the positioning plate 506.

[0066] To handle the mold, a second hydraulic cylinder 507 is fixedly installed on the upper surface of the slider 504 extending out of the groove 501. A connecting block 508 is fixedly connected to one end of the piston rod of the second hydraulic cylinder 507. A third hydraulic cylinder 509 is fixedly installed on the lower surface of the connecting block 508. A vacuum suction cup 510 is fixedly installed on one end of the piston rod of the third hydraulic cylinder 509 through a connector. The movement of the slider 504 causes the second hydraulic cylinder 507, the connecting block 508, the third hydraulic cylinder 509, and the vacuum suction cup 510 to move synchronously. The extension and retraction of the piston rod of the second hydraulic cylinder 507 causes the connecting block 508, the third hydraulic cylinder 509, and the vacuum suction cup 510 to move back and forth. The extension and retraction of the piston rod of the third hydraulic cylinder 509 causes the vacuum suction cup 510 to move up and down.

[0067] By setting up a transport and pick-up mechanism, the mold transported by the first roller conveyor 1 can be automatically placed onto the press 3, and after the press 3 extrudes the molding material in the mold, it can be transported to the second roller conveyor 4 for removal. This avoids the danger of direct contact between the operator and the press 3 and improves production efficiency.

[0068] Working principle: When in use, the piston rods of the two push cylinders 201 on the support plate 2 extend out and drive the slide plate 202 to move out of the first roller conveyor 1 along the inner wall of the slide groove 203. The retraction of the piston rod of the first hydraulic cylinder 209 on the lower fixed plate 204 drives the slide rod 208 to move along the inner wall of the limiting groove 207, thereby driving the scissor frame 205 to extend. The extension of the scissor frame 205 drives the upper fixed plate 206 to move upward, and then drives the placement plate 210 to move upward until the placement plate 210 is at the same level as the roller on the first roller conveyor 1.

[0069] The mold filled with molding material is transported by the first roller conveyor 1. When the mold is detected by the limit switch 11, the limit switch 11 controls the first roller conveyor 1 to stop running for a period of time. When the first roller conveyor 1 starts running again, the mold falls onto the placement plate 210. The next mold is detected by the limit switch 11, and the limit switch 11 controls the first roller conveyor 1 to stop running again.

[0070] The rotation of the output shaft of the servo motor 503 drives the screw 502 to rotate. The rotation of the screw 502 drives the slider 504 to move along the inner wall of the groove 501 towards the placement plate 210. The movement of the slider 504 drives the through hole 505 to slide along the surface of the positioning plate 506. At the same time, the movement of the slider 504 drives the second hydraulic cylinder 507, the connecting block 508, the third hydraulic cylinder 509 and the vacuum suction cup 510 to move synchronously. When the slider 504 moves to be perpendicular to the mold that has fallen on the placement plate 210, the extension of the piston rod of the second hydraulic cylinder 507 drives the connecting block 508, the third hydraulic cylinder 509 and the vacuum suction cup 510 to move forward until the vacuum suction cup 510 is above the mold. The extension of the piston rod of the third hydraulic cylinder 509 drives the vacuum suction cup 510 to adsorb the mold.

[0071] Then the piston rod of the third hydraulic cylinder 509 resets and lifts the mold. The output shaft of the servo motor 503 rotates in the opposite direction to drive the slider 504 to move to the designated position of the press 3 and place the mold on the press 3. Then the piston rod of the second hydraulic cylinder 507 resets until the press 3 presses the molding material in the mold into shape. Then the second hydraulic cylinder 507 and the third hydraulic cylinder 509 lift the mold again and transport it to the second roller conveyor 4.

[0072] Repeat the steps above.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision orbital grinding wheel set, characterized in that: The raw materials consist of the following components: abrasive, binder, adhesive, and filler; The abrasive is brown fused alumina, diamond, wear-resistant steel powder, and zirconium fused alumina, with the following specific gravity ratios: brown fused alumina 40%-50%, wear-resistant steel powder 5%-15%, zirconium fused alumina 20%-30%, and the balance being diamond. The adhesive is boron phenolic resin, and the bonding agent is epoxy resin; The filler is powdered cryolite, abrasive, dolomite, and silicon carbide powder, with the following specific gravity ratios: powdered cryolite 30%-40%, abrasive 30%-40%, dolomite 20%-30%, and the remainder being silicon carbide powder. The abrasive is cerium oxide.

2. The manufacturing process of a high-precision orbital grinding wheel set according to claim 1, characterized in that: The process includes the following steps: S1, Ingredient preparation: Weigh the required raw materials according to the formula requirements; S2. Mixing: According to the process requirements, the abrasive and other raw materials are mixed in sequence and time to form a molding material, which is then loaded into the mold and transported to the next process by the first roller conveyor (1). S3, molding: the mold is placed on the press (3) by the transport and pick-up mechanism, and the molding material in the mold is pressed into the required shape of the grinding wheel blank by the press (3). The mold after the molding material is pressed is transported to the second roller conveyor (4) by the transport and pick-up mechanism. S4, Drying; S5, firing; S6. Machining: Use machine tools or grinding machines to process the outer circle, plane and hole diameter of the fired blank into finished products; S7, Inspection; S8. Packaging and warehousing; The inner surface of the side plate of the first roller conveyor (1) is provided with a telescopic lifting mechanism. The telescopic lifting mechanism includes a support plate (2). The upper surface of the support plate (2) is fixedly connected to the lower surface of the side plate of the first roller conveyor (1) on both sides. Two push cylinders (201) are fixedly installed on the upper surface of the support plate (2). One end of the piston rod of each of the two push cylinders (201) is fixedly connected to a slide plate (202). The upper surface of the support plate (2) is fixedly connected to a lower fixing plate (204), and the surface of the lower fixing plate (204) is hinged to a scissor frame (205) by a pin. The upper end of the scissor frame (205) is hinged to an upper fixing plate (206) by another pin. The transport and handling mechanism includes two mounting seats (5) respectively installed on both sides of the press (3). A groove (501) is opened on one side of each of the two mounting seats (5). A screw (502) is installed on the inner wall of each of the two grooves (501) through a bearing. A servo motor (503) is fixedly installed on one side of each of the two mounting seats (5). One end of the output shaft of the servo motor (503) extends into the groove (501) and is fixedly sleeved with one end of the screw (502). A slider (504) is threadedly connected to the outer surface of the screw (502). The surface of the slider (504) slides and engages with the inner wall of the groove (501). The slider (504) extends to the surface outside the groove (501) and has a through hole (505). Positioning plates (506) are fixedly installed on both sides of the support of the press (3). The outer surface of the positioning plate (506) is slidably engaged with the inner wall of the through hole (505).

3. The manufacturing process of a high-precision orbital grinding wheel set according to claim 2, characterized in that: The inner surface of the side plate of the first roller conveyor (1) is provided with a limit switch (11), and the inner surfaces of the two side plates of the first roller conveyor (1) are respectively provided with a sliding groove (203). The two sides of the sliding plate (202) are respectively slidably engaged with the inner wall of the sliding groove (203).

4. The manufacturing process of a high-precision orbital grinding wheel set according to claim 2, characterized in that: Limiting grooves (207) are respectively opened on the surfaces of the upper fixing plate (206) and the lower fixing plate (204). A sliding rod (208) is slidably engaged with the inner wall of the limiting groove (207). The two ends of the sliding rod (208) extend out of the limiting groove (207) and are hinged to the two ends of the scissor frame (205). A first hydraulic cylinder (209) is fixedly installed on the inner surface of the lower fixing plate (204). One end of the piston rod of the first hydraulic cylinder (209) is fixedly connected to the surface of the sliding rod (208). A placement plate (210) is fixedly connected to the upper surface of the upper fixing plate (206).

5. The manufacturing process of a high-precision orbital grinding wheel set according to claim 2, characterized in that: The upper surface of the slider (504) extending outside the groove (501) is fixedly mounted with a second hydraulic cylinder (507). One end of the piston rod of the second hydraulic cylinder (507) is fixedly connected to a connecting block (508). The lower surface of the connecting block (508) is fixedly mounted with a third hydraulic cylinder (509). One end of the piston rod of the third hydraulic cylinder (509) is fixedly mounted with a vacuum suction cup (510) through a connector.

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