Polishing wheel for pin shaft polishing and clamping and supporting device matched with polishing wheel

Abstract

The invention relates to the technical field of polishing tools, in particular to a polishing wheel for pin shaft polishing and a matched clamping and supporting device of the polishing wheel, a polishing table is formed by movably butting two L-shaped base tables, the length can be adjusted, and the polishing table is adaptive to different pin shafts. The polishing wheel is of a cylindrical multi-layer composite structure, a base layer is integrally poured by 42CrMo alloy steel, stable support is provided, and the polishing wheel can be recycled; the grinding layer is mixed with silicon carbide and aluminum oxide grinding particles, an elastic supporting piece is doped, distribution of the grinding particles can be automatically adjusted according to the surface pressure of the pin shaft, self-adaptive polishing is achieved, and quality and efficiency are improved. The matched clamping and supporting device alternately clamps the two ends of the pin shaft twice through cooperation of a clamp shell, a conveying roller and the like, the conveying roller supports the pin shaft in the whole process, it is guaranteed that polishing stress is uniform, and polishing dead corners are avoided. According to the technical scheme, the problems that an existing polishing wheel is uneven in polishing, low in efficiency and the like are effectively solved, the problems of polishing dead corners and uneven stress caused by a traditional clamping mode are effectively solved, and the overall pin shaft polishing effect is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing tools, in particular to a polishing wheel used for polishing a pin shaft and a matching clamping and supporting device thereof. Background Art

[0002] Pins are a type of standardized fasteners that can be used for static fixed connections or for relative movement with the connected parts. They are mainly used at the hinges of two parts to form hinge connections. Pins are usually locked with cotter pins, and they work reliably and are easy to disassemble. Pins need to be maintained after long-term use. Polishing of the pins is one of the processes for maintaining the pins. In the prior art, polishing is usually performed with the help of polishing equipment.

[0003] However, the polishing wheel in the prior art has a simple structure and cannot automatically adjust the grinding force according to the flatness of the pin surface. It is difficult to completely remove defects on uneven parts, and the flat parts are prone to over-grinding, resulting in uneven polishing. It lacks adaptive ability and cannot sense and adapt to changes in the surface state of the pin, and cannot meet the polishing requirements of pins with complex shapes and different surface conditions. The polishing efficiency is low, and uneven areas need to be polished repeatedly, and over-grinding will cause material loss and waste of time. It is highly dependent on the accuracy of the polishing equipment. Any slight deviation or vibration of the equipment will easily cause defects on the pin surface, increasing the equipment maintenance cost and operation difficulty.

[0004] In addition, when the polishing equipment is used, the pin is often manually fixed in the positioning fixture of the polishing equipment, and then the surface of the pin is ground and polished by a movable polishing wheel; however, the existing polishing equipment has certain shortcomings when operating. For example, when the two ends of the pin are fixed with a positioning fixture, a small part of the outer cylindrical surface of the pin will be covered by the fixture, that is, there is a polishing dead angle, and the clamping point position needs to be manually changed and polished again, which is inefficient and cumbersome to operate; for example, one end of the pin is fixed with a positioning fixture for a polishing, and then the pin is reversed so that the other end is fixed for a second polishing. In this way, only one end of the pin is fixed, which easily makes the pin extremely uneven during polishing, thereby affecting the polishing quality. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a polishing wheel for polishing a pin shaft and a matching clamping support device thereof, comprising a polishing table, a second slide rail is installed on the top of the polishing table, a polishing machine that can slide horizontally is installed on the second slide rail, a polishing wheel is arranged at the bottom of the polishing machine and is located directly above the pin shaft, the polishing wheel is a multi-layer composite structure, and self-adjusting abrasive particles are embedded therein; The polishing table is composed of two basal platforms that are movably connected to each other, and each basal platform is composed of a horizontal plate and a vertical plate that are vertically fixedly connected. A slide rail 1 is fixedly arranged on the top of the horizontal plate of each basal platform, and a clamp shell is arranged on the side surface of the vertical plate of each basal platform, one of the clamp shells clamps a pin shaft, and a slide is slidably connected to the top of the slide rail 1. Two groups of columns corresponding to each other are arranged on the top of the slide, and the number of columns in each group is two, and a mounting frame is fixedly installed on each column, and a conveying roller is rotatably installed on the mounting frame for supporting and conveying the pin shaft, and a pulley is fixedly connected between the two conveying rollers in each group of columns.

[0006] Preferably, the polishing wheel is a cylindrical structure, including an inner base layer and an outer grinding layer. The base layer is integrally cast from 42CrMo alloy steel, and a mounting hole is provided in the center for mounting on a drive shaft. The drive shaft is connected to the polishing machine through a belt. The outer surface of the base layer is also provided with several circles of integrally formed annular strips, which are embedded in the inner surface of the grinding layer.

[0007] Preferably, the grinding layer is made of a mixture of silicon carbide grinding particles and aluminum oxide grinding particles, and is solidified in a mold with a binder. Elastic support members are also incorporated into the grinding layer to act as self-adjusting grinding particles. The elastic support members are evenly mixed with the silicon carbide grinding particles and the aluminum oxide grinding particles, and are solidified integrally to the outer circle of the base layer.

[0008] Preferably, the cross-sections of the two bases of the polishing table are both "L"-shaped structures, and the cross-section of the polishing table as a whole is a "U"-shaped structure. The two bases are movably connected by a connecting rod, and the distance between the two bases is variable.

[0009] Preferably, the pulley is connected to the servo motor via a belt, and the two pulleys located on the two groups of columns are connected to two servo motors with the same rotation direction.

[0010] Preferably, a circular placement groove is provided on the side of the clamp shell, and a carrier plate parallel to its bottom surface is fixedly filled in the placement groove. A plurality of slide grooves are provided on the carrier plate, and a clamping block having the same number of slide grooves as the outer surface of the carrier plate is slidably connected to clamp one end of the pin shaft.

[0011] Preferably, each of the clamping blocks is slidably connected in the slide groove via a connecting block, and a pull rod is movably hinged on the connecting block of each clamping block, and the pull rod is located between the carrier plate and the bottom surface of the placement groove.

[0012] Preferably, the other end of each pull rod is movably connected to the same gear plate, which is rotatably connected to the bottom surface of the placement slot, a gear is meshed on one side of the gear plate, an electric motor is installed on the rear surface of the clamp housing, and the output shaft of the electric motor is movably extended into the placement slot and connected to the gear.

[0013] Preferably, an "L"-shaped push rod is fixedly connected to the bottom end of the outer surface of the fixture shell, and the end face of the push rod is opposite to the side surface of the slide. A cylinder is installed on the outer surface of the vertical plate of each base of the polishing table, and the output shaft of the cylinder moves through the entire vertical plate of the base and is rotatably connected to the rear surface of the fixture shell through a bearing.

[0014] Preferably, the second slide rail includes two bases respectively fixedly connected to the top ends of the two bases of the polishing table, wherein the top end of one of the bases is vertically fixedly connected to a beam, one end of the beam is fixedly connected to an extension plate, the cross-sectional area of ​​the extension plate is smaller than the cross-sectional area of ​​one end of the beam and the extension plate movably passes through the other base.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The polishing wheel adopts a layered design. The base layer is made of 42CrMo alloy steel to provide a stable support structure for the entire polishing wheel, ensuring that it will not deform during high-speed rotation and long-term use, and can be recycled; and the composite structure grinding layer adds tiny elastic support parts between the grinding particles, which will deform according to the contact pressure between the polishing wheel and the pin surface, thereby achieving adaptive polishing and improving polishing quality and efficiency.

[0016] 2. One end of the pin is clamped and positioned by a fixture housing on one side, and the shaft body is supported and rotated by two sets of conveyor rollers. The polishing machine controls the polishing wheel to move from the initial position to a symmetrical position about the two center points of the slide rails and stops, completing the first polishing of the pin. The other end of the pin is driven by the two sets of conveyor rollers to be clamped in the fixture housing on the other side, and the polishing machine controls the polishing wheel to move back to its original position, completing the second polishing of the pin. Two reciprocating polishings can process both ends of the pin to avoid polishing dead angles. The two polishing operations clamp and position the two ends of the pin respectively, and no matter which end is clamped, the two sets of conveyor rollers always support the pin, so that the force of the pin during the polishing process is relatively uniform, further ensuring the polishing quality of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is the overall appearance diagram of the polishing equipment of the present invention; Figure 2 For the present invention Figure 1 A front view of Figure 3 This is a disassembled diagram of the internal structure of the fixture housing of the present invention; Figure 4 For the present invention Figure 3 A front view of Figure 5 It is a schematic diagram of the polishing table and its top slide rail 1 and the slide table connection structure of the present invention; Figure 6 For the present invention Figure 1 Schematic diagram from another perspective; Figure 7 A schematic diagram of the structure of the polishing wheel of the present invention; Figure 8 It is a cross-sectional view of the polishing wheel structure of the present invention; Fig. 9 For the present invention Figure 1 A top view of; Fig.10 It is a schematic diagram of the composition of the polishing table of the present invention.

[0018] Description of reference numerals: 1. Polishing table; 11. Slide rail 1; 12. Slide rail 2; 121. Base; 122. Crossbeam; 123. Extension plate; 13. Polishing machine; 131. Polishing wheel; 1311: Base layer; 1312: Grinding layer; 1313: Mounting hole; 1314: Ring bar; 1315: Elastic support member; 1316: Driving shaft; 14. Cylinder; 2. Clamp housing; 21. Placement slot; 22. Carrying plate; 221. Slide slot; 222. Clamping block; 223. Pull rod; 23. Toothed plate; 24. Gear; 241. Electric motor; 25. Push rod; 3. Slide; 31. Column; 32. Mounting frame; 33. Conveyor roller; 34. Pulley; 4. Pin shaft. DETAILED DESCRIPTION

[0019] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0020] like Figure 1-Figure 10As shown in the figure, it is an embodiment of the present invention. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a polishing wheel for pin shaft polishing and its supporting clamping and supporting device, including a polishing table 1, the polishing table 1 is composed of two bases movably connected to each other, each base is composed of a horizontal plate and a vertical plate vertically fixedly connected, the two base cross sections of the polishing table 1 are both "L"-shaped structures, and the cross section of the polishing table 1 is a "U"-shaped structure as a whole. The two bases are movably connected by a connecting rod, and the distance between the two bases is variable. The distance between the two bases can be changed by manually adjusting the screw rod or by electrically controlling the cylinder for adjusting the distance. Changing the spacing between the two bases can lengthen or shorten the length of the entire polishing table 1, which is convenient for real-time and appropriate adjustment of pin shafts of different lengths, and has better versatility. A slide rail 11 is fixedly set on the top of the horizontal plate of each base, such as Figure 8 As shown, the slide rail 11 is a "T"-shaped structure, and the slide rail 11 is flush with the end surface of the base, and a clamp housing 2 is provided on the side surface of the vertical plate of each base, wherein a pin shaft 4 is clamped inside one of the clamp housings 2, and the two clamp housings 2 are symmetrically arranged, and the internal structures of the two clamp housings 2 are the same; Further, such as Figure 7-Figure 8 As shown, the polishing wheel 131 is a cylindrical structure, including an inner base layer 1311 and an outer grinding layer 1312. The base layer 1311 is integrally cast from 42CrMo alloy steel, which has good comprehensive mechanical properties and high yield strength, and can effectively withstand the centrifugal force and pressure generated during the polishing process, ensuring that the polishing wheel will not deform or break when rotating at high speed. A mounting hole 1313 is opened in the center for mounting on a drive shaft 1316, and the drive shaft 1316 is connected to the polishing machine 13 through a belt.

[0021] The outer surface of the base layer 1311 is also provided with a plurality of circles of integrally formed annular strips 1314, which are embedded in the inner surface of the grinding layer 1312. The spiral direction of the annular strips 1314 is opposite to the rotation direction of the polishing wheel 131, so that the annular strips 1314 can provide a greater binding force to the grinding layer 1312, so that the base layer 1311 and the grinding layer 1312 are more closely combined, reducing the vibration caused by self-loosening, thereby making the polishing process more stable.

[0022] The grinding layer 1312 is made of a mixture of silicon carbide grinding particles and aluminum oxide grinding particles, and is solidified in a mold with a binder. An elastic support member 1315 is also mixed inside the grinding layer 1312. The elastic support member 1315 is uniformly mixed with the silicon carbide grinding particles and the aluminum oxide grinding particles, and is integrally solidified to the outer ring of the base 1311. In actual production, the base 1311 can be recycled and can be replaced when the grinding layer 1312 is worn to the scrap standard. The replaced base 1311 can be used as the original part of the polishing wheel 131 again after cleaning the outer grinding layer 1312 and checking that there is no damage. It is placed in a preparation mold, and then the elastic support member 1315 is uniformly mixed with the silicon carbide grinding particles and the aluminum oxide grinding particles, and then poured into the mold together with the binder for cold pressing molding. The molding pressure is 8-12MPa, and the curing temperature is 120-150℃, and the curing time is 20-30 minutes. The elastic support 1315 added to the grinding layer 1312 is a tiny truncated cone structure. After molding, when the polishing wheel 131 contacts the surface of the pin 4, the elastic support 1315 will deform according to the different contact pressures. In the uneven part of the pin 4 surface, the contact pressure is large, and the elastic support 1315 is compressed, so that the abrasive particles in this area are arranged more closely, enhancing the grinding effect; while in the relatively flat part of the pin 4 surface, the contact pressure is small, the elastic support 1315 recovers part of the deformation, and the abrasive particles are relatively sparsely distributed to avoid excessive grinding. In this way, adaptive polishing of the pin 4 surface can be achieved, and the polishing quality and efficiency can be improved.

[0023] Further, such as Figure 5-Figure 6 , Fig. 9 As shown, a slide 3 is slidably connected to the top of the slide rail 11, and two groups of columns 31 corresponding to each other are arranged on the top of the slide 3. The number of each group of columns 31 is two, and a mounting frame 32 is fixedly installed on each column 31. A conveying roller 33 is rotatably installed on the mounting frame 32 for supporting and conveying the pin shaft 4. A pulley 34 is fixedly connected between the two conveying rollers 33 in each group of columns 31. The pulley 34 is connected to the servo motor through a belt. The two pulleys 34 located on the two groups of columns 31 are connected to two servo motors with the same steering direction, or can be connected to the same servo motor. The slide 3 can be displaced in the horizontal direction on the slide rail 11. During the movement of the slide 3, all the structures on its top are driven to move synchronously. The front and rear groups of conveying rollers 33 are symmetrically distributed, as shown in FIG. Figure 1 and Figure 2As shown, the outer surface of the conveying roller 33 is firmly supported and fitted on the lower half of both sides of the outer surface of the pin shaft 4, and the upper half of the pin shaft 4 is not blocked by the conveying roller 33. When the pulley 34 is driven to rotate by the servo motor, the pulley 34 drives the conveying rollers 33 fixedly connected at both ends to rotate. Since the two groups of conveying rollers 33 have the same direction of rotation, the two groups of rotating conveying rollers 33 can drive the pin shaft 4 supported above them to rotate, which is convenient for the comprehensive grinding of the shaft body of the pin shaft 4. Further, such as Figure 3 and Figure 4 As shown, a circular placement groove 21 is provided on the side of the clamp housing 2, and a carrier plate 22 parallel to the bottom surface thereof is fixedly filled in the placement groove 21, and a plurality of slide grooves 221 are provided on the carrier plate 22, and the outer surface of the carrier plate 22 is slidably connected with clamping blocks 222 having the same number as the slide grooves 221, which are used to clamp one end of the pin shaft 4, and each clamping block 222 is slidably connected in the slide groove 221 through a connecting block, and a pull rod 223 is movably hinged on the connecting block of each clamping block 222; The pull rod 223 is located between the carrier plate 22 and the bottom surface of the placement slot 21. The other end of each pull rod 223 is movably connected to the same toothed disc 23. The toothed disc 23 is rotatably connected to the bottom surface of the placement slot 21. A gear 24 is meshed on one side of the toothed disc 23. An electric motor 241 is installed on the rear surface of the clamp housing 2. The output shaft of the electric motor 241 movably extends into the placement slot 21 and is connected to the gear 24. The electric motor 241 drives the gear 24 to rotate clockwise, thereby driving the toothed disc 23 to rotate. During the rotation of the toothed disc 23, a plurality of Each pull rod 223 drives the connection block and the clamping block 222 to move along each slide groove 221. The clamping blocks 222 are distributed in a circular array on the outer surface of the carrier plate 22, and each clamping block 222 moves toward the center of the carrier plate 22, so that the diameter of the circle formed by the clamping blocks 222 is reduced, which is used to clamp the pin shaft 4. When the pin shaft 4 is released, the electric motor 241 drives the gear 24 to rotate counterclockwise, and each clamping block 222 moves away from the center of the carrier plate 22, so that the diameter of the circle formed by the clamping blocks 222 is increased. A proximity sensor is installed at the center of the carrier plate 22. The proximity sensor is a device capable of sensing the proximity of an object. It uses the displacement sensor to have sensitive characteristics to the approaching object to identify the approach of the object and output a corresponding switch signal. When the proximity sensor detects that the pin shaft 4 is close to the carrier plate 22, the switch of the electric motor 241 can be automatically started, and the plurality of clamping blocks 222 can be further driven to automatically clamp the pin shaft 4. Among them, an "L"-shaped push rod 25 is fixedly connected to the bottom end of the outer surface of the clamp housing 2. Figure 2As shown, the end surface of the push rod 25 is opposite to the side surface of the slide 3, and a cylinder 14 is installed on the outer surface of the vertical plate of each base of the polishing table 1. The output shaft of the cylinder 14 movably penetrates the entire vertical plate of the base and is rotatably connected to the rear surface of the fixture housing 2 through a bearing. When the pin shaft 4 is rotated by the rotation of the two sets of conveying rollers 33, since one end of the pin shaft 4 is clamped in one of the fixture housings 2, the fixture housing 2 and the output shaft of the cylinder 14 are rotatably connected through a bearing. Therefore, the rotation of the pin shaft 4 will drive the fixture housing 2 to rotate synchronously, which is convenient for the polishing of the pin shaft 4. Further, such as Figure 6 As shown, a slide rail 12 is installed on the top of the polishing table 1. The slide rail 12 includes two bases 121 fixedly connected to the tops of the two bases of the polishing table 1 respectively, and a crossbeam 122 is fixedly connected to the top of one of the bases 121 vertically, and one end of the crossbeam 122 is fixedly connected to an extension plate 123. The cross-sectional area of ​​the extension plate 123 is smaller than the cross-sectional area of ​​one end of the crossbeam 122 and is movably passed through the other base 121. When the overall length of the polishing table 1 is elongated, the slide rail 12 can adapt to the length of the polishing table 1 and elongate accordingly. A polishing machine 13 that can slide horizontally is installed on the slide rail 12. A polishing wheel 131 is provided at the bottom of the polishing machine 13 and is located directly above the pin 4. According to the prior art, the polishing machine 13 is horizontally moved on the slide rail 12, driving the polishing wheel 131 to move synchronously while also driving the polishing wheel 131 to rise and fall adaptively, as shown in FIG. Figure 1 As shown, a driving motor is installed on the polishing machine 13, and the output shaft of the driving motor is connected to the shaft of the polishing wheel 131 through a belt, so as to drive the polishing wheel 131 to grind and polish the pin 4; The polishing machine 13 controls the polishing wheel 131 from Figure 2 The first polishing of the pin 4 is completed. At this time, the polishing wheel 131 stays at the fixture housing 2 close to the clamping pin 4. Then, one end of the pin 4 is released from the fixture housing 2. After the release, the pin 4 is still on the two sets of conveying rollers 33 and the position is fixed. At this time, the cylinder 14 connected to the side fixture housing 2 is started, and the cylinder 14 drives the fixture housing 2 and the push rod 25 to move. One end is in contact with the side surface of the slide 3, so the cylinder 14 on this side drives the slide 3 to slide on the slide rail 11 by driving the push rod 25 until the two sets of conveying rollers 33 drive the other end of the pin 4 to move into the clamp housing 2 on the other side and be automatically clamped. When the other end of the pin 4 is clamped by the clamp housing 2 on the other side, the polishing machine 13 is started to control the polishing wheel 131 to polish the pin 4 for the second time. The moving direction of the polishing wheel 131 for the second polishing is opposite to that of the first polishing and the moving distance is the same.

[0024] When the above embodiment is working, firstly, the polishing table 1 is adjusted to an appropriate length according to the size of the pin shaft to be processed, and at the same time, the front and rear two sets of conveying rollers 33 are adjusted to an appropriate spacing according to the diameter of the pin shaft, and then the pin shaft is placed above the two sets of conveying rollers 33, and one end of the pin shaft is moved into the inside of the fixture housing 2. When the proximity sensor detects that the pin shaft 4 is close to the carrier plate 22, the switch of the electric motor 241 can be automatically started, and the electric motor 241 drives the gear 24 to rotate, and the gear 24 drives the gear plate 23 engaged therewith to rotate. During the rotation of the gear plate 23, the clamping block 222 is driven to move along each slide groove 221 through a plurality of pull rods 223, so that the diameter of the circle formed between the plurality of clamping blocks 222 is reduced until the pin shaft 4 is pressed. The two sets of conveying rollers 33 are then driven to rotate in the same direction, thereby driving the pin 4 to rotate. Finally, the polishing machine 13 and the polishing wheel 131 are started. The polishing machine 13 controls the polishing wheel 131 to move from the initial position, and stops when it moves to a symmetrical position about the center point of the slide rail 12, completing the first polishing of the pin 4. Subsequently, one end of the pin 4 is released from the fixture housing 2 at that location, and the fixture housing 2 is driven by the cylinder 14 to drive the push rod 25 to move the slide 3 until the other end of the pin 4 is driven by the two sets of conveying rollers 33 to move into the fixture housing 2 on the other side and be automatically clamped. Then, the polishing machine 13 controls the polishing wheel 131 to move back to its original position to complete the second polishing of the pin 4, so that the surface of the pin is completely and fully processed.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polishing wheel for polishing a pin shaft and a supporting clamping device thereof, comprising a polishing table (1), characterized in that: A second slide rail (12) is installed at the top of the polishing table (1), a polishing machine (13) that can slide horizontally is installed on the second slide rail (12), a polishing wheel (131) is provided at the bottom of the polishing machine (13) and is located directly above the pin shaft (4), and the polishing wheel (131) is a multi-layer composite structure and has self-adjusting abrasive particles embedded therein; The polishing table (1) is composed of two movably connected bases, each of which is composed of a horizontal plate and a vertical plate that are vertically fixedly connected, a slide rail (11) is fixedly arranged on the top of the horizontal plate of each base, and a clamp shell (2) is arranged on the side surface of the vertical plate of each base, wherein a pin shaft (4) is clamped inside one of the clamp shells (2), and a slide table (3) is slidably connected to the top of the slide rail (11), and the top of the slide table (3) is provided with two groups of columns (31) corresponding to each other in front and back, each group of columns (31) has two columns and each column (31) is fixedly installed with a mounting frame (32), and a conveying roller (33) is rotatably installed on the mounting frame (32) for supporting and conveying the pin shaft (4), and a pulley (34) is fixedly connected between the two conveying rollers (33) in each group of columns (31).

2. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 1, characterized in that: The polishing wheel (131) is a cylindrical structure, comprising an inner base layer (1311) and an outer grinding layer (1312); the base layer (1311) is integrally cast from 42CrMo alloy steel, a mounting hole (1313) is provided at the center thereof for mounting on a drive shaft (1316); the drive shaft (1316) is connected to the polishing machine (13) via a belt; the outer surface of the base layer (1311) is further provided with a plurality of integrally formed annular strips (1314); the annular strips (1314) are embedded in the inner surface of the grinding layer (1312).

3. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 2, characterized in that: The grinding layer (1312) is made of a mixture of silicon carbide grinding particles and aluminum oxide grinding particles, and is solidified in a mold using a binder. The grinding layer (1312) is also mixed with elastic support members (1315) to act as self-adjusting grinding particles. The elastic support members (1315) are uniformly mixed with the silicon carbide grinding particles and the aluminum oxide grinding particles, and are solidified integrally to the outer circle of the base layer (1311).

4. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 1, characterized in that: The cross-sections of the two bases of the polishing table (1) are both "L"-shaped structures, and the cross-section of the polishing table (1) as a whole is a "U"-shaped structure. The two bases are movably connected via a connecting rod, and the distance between the two bases is variable.

5. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 4, characterized in that: The pulley (34) is connected to the servo motor via a belt, and the two pulleys (34) located on the two groups of columns (31) are connected to two servo motors with the same rotation direction.

6. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 5, characterized in that: A circular placement groove (21) is provided on the side of the clamp housing (2), a carrier plate (22) parallel to the bottom surface of the placement groove (21) is fixedly filled in the placement groove (21), a plurality of slide grooves (221) are provided on the carrier plate (22), and a clamping block (222) having the same number as the slide grooves (221) is slidably connected to the outer surface of the carrier plate (22) for clamping one end of the pin shaft (4).

7. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 6, characterized in that: Each of the clamping blocks (222) is slidably connected in the slide groove (221) via a connecting block, and a pull rod (223) is movably hinged on the connecting block of each clamping block (222), and the pull rod (223) is located between the carrier plate (22) and the bottom surface of the placement groove (21).

8. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 7, characterized in that: The other end of each pull rod (223) is movably connected to the same toothed disc (23), the toothed disc (23) is rotatably connected to the bottom surface of the placement slot (21), one side of the toothed disc (23) is meshed with a gear (24), an electric motor (241) is mounted on the rear surface of the clamp housing (2), and the output shaft of the electric motor (241) movably extends into the placement slot (21) and is connected to the gear (24).

9. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 8, characterized in that: An "L"-shaped push rod (25) is fixedly connected to the bottom end of the outer surface of the clamp housing (2), and the end surface of the push rod (25) is opposite to the side surface of the slide table (3). A cylinder (14) is installed on the outer surface of the vertical plate of each base of the polishing table (1), and the output shaft of the cylinder (14) movably passes through the vertical plate of the entire base and is rotatably connected to the rear side surface of the clamp housing (2) through a bearing.

10. A polishing wheel for pin polishing and its matching clamping and supporting device according to claim 9, characterized in that: The second slide rail (12) comprises two bases (121) respectively fixedly connected to the top ends of the two bases of the polishing table (1), wherein a crossbeam (122) is fixedly connected vertically to the top end of one of the bases (121), and an extension plate (123) is fixedly connected to one end of the crossbeam (122), wherein the cross-sectional area of ​​the extension plate (123) is smaller than the cross-sectional area of ​​one end of the crossbeam (122) and movably passes through the other base (121).

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