High-precision coreless grinding wheel for shaft and grinding method

Abstract

The application discloses a high-precision coreless grinding wheel for shaft and a grinding method, relates to the technical field of shaft processing, and solves the problem that the current shaft cylindricity and roundness processing is mostly direct turning processing or traditional coreless grinding, and the cylindricity after grinding is mostly 7-8 um, and the roundness is 4-5 um, which cannot meet the demand of high-end notebook computers on high-precision shafts. The high-precision coreless grinding wheel for shaft and the grinding method, which comprise a workpiece supporting plate, one side of the workpiece supporting plate is provided with a rotating assembly, the rotating assembly is internally provided with two grinding wheel assemblies, and the other side of the workpiece supporting plate is provided with multiple guide wheels. The device is used in the mode of replacing the grinding wheel, the grinding wheel is replaced after being used for 200 times, the cylindricity and roundness of the workpiece after grinding are improved, the workpiece has better cylindricity and roundness, has higher stability, and the torsional force during subsequent assembly of the workpiece is improved.

Description

Technical Field

[0001] This invention relates to the field of shaft machining, specifically to a high-precision centerless grinding wheel and grinding method for shafts. Background Technology

[0002] In traditional centerless grinding methods, the cylindricity of the machined shaft is 7-8 μm, and the roundness is 4-5 μm. However, as shaft technology matures and market demands for shafts increase, shafts produced by traditional centerless grinding methods can no longer meet the tactile requirements of high-end products. High-end products have higher requirements for stable torque in shafts, which necessitates improved precision in shaft machining.

[0003] Currently, although shaft machining, whether through direct turning or coreless grinding, can meet the torque requirements for shaft rotation during assembly, it cannot meet the requirements for a smooth, stable, and gentle feel when assembled into high-end laptops. Therefore, the demand for high-precision coreless grinding is becoming increasingly important.

[0004] Existing methods for machining the cylindricity and roundness of shafts mostly involve direct turning or traditional centerless grinding. However, the cylindricity after grinding is typically 7-8 μm and the roundness is 4-5 μm, which cannot meet the high-precision shaft requirements of high-end laptops. Therefore, to address these shortcomings, we propose a high-precision centerless grinding wheel and grinding method for shafts. Summary of the Invention

[0005] The purpose of this invention is to provide a high-precision centerless grinding wheel and grinding method for shafts, in order to solve the problems mentioned in the background art, such as the fact that the cylindricity and roundness of shafts are mostly processed by direct turning or traditional centerless grinding, and the cylindricity after grinding is mostly 7~8um and the roundness is 4~5um, which cannot meet the high-precision shaft requirements of high-end laptops.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-precision coreless grinding wheel for shafts, comprising a workpiece support plate, a rotating assembly on one side of the workpiece support plate, two grinding wheel assemblies inside the rotating assembly, and multiple guide wheels on the other side of the workpiece support plate;

[0007] The rotating assembly includes a rotary table, an arc-shaped clamping plate, a rotating shaft, a movable baffle, and a stepper motor. The rotary table is movably mounted on one side of the workpiece pallet. A rotating shaft is fixedly connected inside the rotary table. Arc-shaped clamping plates are fixedly mounted on both sides of the rotary table. Movable baffles are movably mounted on the outer ends of the arc-shaped clamping plates. A stepper motor is provided on the rear side of the rotary table. The output end of the stepper motor is connected to one end of the rotating shaft through a coupling.

[0008] Preferably, the rotating assembly further includes an arc-shaped plug-in plate, an arc-shaped plug-in groove, and threaded holes. An arc-shaped plug-in plate is fixedly installed at one end of each movable baffle. An arc-shaped plug-in groove is provided on the side of each arc-shaped clamping plate near the movable baffle. Each arc-shaped plug-in plate is movably inserted into the interior of the arc-shaped plug-in groove. Three threaded holes are provided on the outer surface of both the arc-shaped plug-in plate and the arc-shaped clamping plate. The arc-shaped plug-in plate and the arc-shaped clamping plate are connected by bolt threads.

[0009] Preferably, the grinding wheel assembly includes a grinding wheel, a grinding wheel shaft, a connecting rod, a sliding groove, a cross-shaped limiting groove, a limiting buckle, and a compression spring. The grinding wheels are movably mounted inside the arc-shaped clamping plate. A grinding wheel shaft is fixedly installed inside each grinding wheel. Both ends of the grinding wheel shaft are provided with sliding grooves, and each sliding groove contains a cross-shaped limiting groove. Connecting rods are slidably mounted at both ends of the grinding wheel shaft. The connecting rods are slidably inserted into the sliding grooves. Limiting buckles are fixedly installed on the outer surface of each connecting rod, and these limiting buckles are slidably inserted into the cross-shaped limiting grooves. A compression spring is movably mounted between the connecting rod and the interior of the sliding groove.

[0010] Preferably, the rotating assembly has a base on both the front and rear sides near the bottom. Two guide rails are fixedly installed on the top of each base. A sliding plate is slidably installed on the top of each guide rail. A servo motor is fixedly installed on the top of one of the sliding plates, and a rotating shaft fixing platform is fixedly installed on the top of the other sliding plate. The output end of the servo motor is connected to a connecting shaft through a coupling. The outer end of the rotating shaft fixing platform is rotatably connected to the connecting shaft.

[0011] Preferably, the outer end of each connecting shaft is provided with a connecting groove, and the interior of each connecting groove is provided with three spring grooves. A pressing plate is slidably installed inside each spring groove, and a compression spring is movably installed between the pressing plate and the interior of the spring groove.

[0012] Preferably, the stepper motor and the rotating shaft are rotatably connected to the base via a support frame, and both ends of the guide wheel are rotatably connected to a support frame. A reduction motor is provided on one side of the guide wheel, and the output end of the reduction motor is connected to the axis of the guide wheel via a coupling.

[0013] Preferably, both connecting rods near the workpiece support plate are slidably inserted into the connecting groove, and the surface of the extrusion plate is in contact with the surface of the connecting rod.

[0014] Preferably, a cylinder is provided on one side of the guide rail, and the cylinder pushes the sliding plate to slide on the surface of the guide rail.

[0015] Preferably, the top of the workpiece support plate is provided with a workpiece, and the two side surfaces of the workpiece are respectively in contact with the surfaces of the grinding wheel and the guide wheel.

[0016] A grinding method for a high-precision centerless grinding wheel for shafts, the grinding method comprising the following steps:

[0017] Step A: First, drive the guide wheel to rotate via a geared motor, and then drive the connecting shaft to rotate via a servo motor. This causes the connecting shaft to rotate the connecting rod, which in turn drives the grinding wheel shaft to rotate, making the grinding wheel follow the rotation. Keep the guide wheel and the grinding wheel rotating in the same direction but at different speeds. At this time, place the workpiece on the surface of the workpiece tray. The workpiece will rotate along with the guide wheel due to its rotation, thus moving the workpiece along the direction of the workpiece tray. When the workpiece moves to the position of the grinding wheel, it will be ground by the grinding wheel.

[0018] Step B: After the workpiece is ground, it will move along the direction of the workpiece pallet until it is unloaded. When the grinding wheel has been ground 200 times, the servo motor will be stopped first, and the sliding plate will be driven by the cylinder to slide on the surface of the guide rail, so that the connecting shaft is disconnected from the grinding wheel shaft. Then the stepper motor can be started to drive the rotating shaft to rotate, which in turn drives the rotary table to rotate. At this time, the rotary table will drive the arc-shaped clamping plate to rotate 180 degrees, so that the two grinding wheels will exchange positions, and the workpiece will be ground by the new grinding wheel. At this time, the old grinding wheel can be removed from the surface of the rotary table for replacement.

[0019] Step C: When it is necessary to remove the grinding wheel, first remove the bolt inside the threaded hole connecting the movable baffle and the arc-shaped clamping plate on the outer side. Then rotate the movable baffle along the axis of the grinding wheel to make the arc-shaped insertion plate rotate out from the inside of the arc-shaped insertion slot, thereby removing the movable baffle and the arc-shaped insertion plate. At this time, the old grinding wheel can be removed from the inside of the arc-shaped clamping plate and repaired.

[0020] Step D: After the old grinding wheel is repaired, it can be inserted into the inner side of the outer arc-shaped clamping plate, and the movable baffle is installed back in its original position to clamp the grinding wheel and prevent it from falling off. This continues until the new grinding wheel has been ground 200 times. Then, the cylinder drives the sliding plate to slide on the surface of the guide rail, causing the connecting shaft to disconnect from the grinding wheel shaft. Subsequently, the stepper motor is started to drive the rotary table to rotate, thereby exchanging the positions of the two grinding wheels. At the same time, the cylinder is started to drive the sliding plate to slide on the surface of the guide rail, causing the connecting rod to be inserted into the connecting groove. At this time, the connecting rod will hit the surface of the extrusion plate and cause the extrusion plate to retract into the spring groove. When the connecting rod is fully inserted into the connecting groove, the extrusion plate will be ejected by the elastic potential energy of the compression spring and clamp the connecting rod, thereby connecting the connecting rod and the connecting shaft. The grinding wheel can then be driven to rotate by the servo motor to grind the workpiece.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention improves the cylindricity and roundness of the workpiece after grinding by replacing the grinding wheel. This results in better cylindricity and roundness, higher stability, and reduced torque slippage during subsequent assembly of the workpiece.

[0023] 2. This invention, through the cooperation of the grinding wheel assembly and the rotating assembly, allows the two grinding wheels to be swapped by rotating the rotating assembly when the grinding wheel needs maintenance. This enables the operator to perform grinding on the second grinding wheel while maintaining the first grinding wheel, thus avoiding downtime during grinding wheel maintenance that would reduce production efficiency.

[0024] 3. The present invention, through the cooperation of the movable baffle and the arc-shaped plug plate, allows the device to release the restriction on the grinding wheel when disassembling the grinding wheel by removing the bolt in the threaded hole and rotating and pulling out the movable baffle. This facilitates the disassembly of the grinding wheel and also prevents workers from coming into contact with the grinding wheel being processed, which could lead to burns or abrasions. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a cross-sectional front view of the entire invention;

[0027] Figure 3 This is a top cross-sectional view of the entire invention;

[0028] Figure 4 This is a cross-sectional side view of the entire invention;

[0029] Figure 5 This is a cross-sectional side view of the location of the connecting shaft in this invention;

[0030] Figure 6 For the present invention Figure 2 A partial structural diagram of part A in the middle;

[0031] Figure 7 For the present invention Figure 4 A partial structural diagram of part B;

[0032] Figure 8 This is a scatter plot showing the number of grinding cycles compared to the number of times the material was ground to a roundness of 3.

[0033] Figure 9 This is a scatter plot showing the cylindricity and number of external cylindrical grinding cycles of the present invention.

[0034] Figure 10 This is a scatter plot of the torque difference and the number of external cylindrical grinding cycles according to the present invention.

[0035] Figure 11 This is a roundness analysis diagram of the grinding wheel after repair of the present invention;

[0036] Figure 12 This is a cylindricity analysis diagram of the grinding wheel after repair and grinding according to the present invention.

[0037] In the diagram: 1. Workpiece support plate; 2. Grinding wheel assembly; 201. Grinding wheel; 202. Grinding wheel shaft; 203. Connecting rod; 204. Sliding groove; 205. Cross-shaped limit groove; 206. Limit buckle; 207. Compression spring; 3. Rotating assembly; 301. Rotary table; 302. Arc-shaped clamping plate; 303. Rotating shaft; 304. Movable baffle; 305. Arc-shaped insertion plate; 306. Arc-shaped insertion groove; 307. Threaded hole; 308. Stepper motor; 4. Base; 5. Guide wheel; 6. Guide rail; 7. Sliding plate; 8. Servo motor; 9. Rotary shaft fixing table; 10. Connecting shaft; 11. Workpiece; 12. Connecting groove; 13. Spring groove; 14. Compression spring; 15. Extrusion plate. Detailed Implementation

[0038] 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.

[0039] Please see Figures 1 to 7 An embodiment of the present invention provides: a high-precision coreless grinding wheel for shafts, including a workpiece support plate 1, a rotating assembly 3 on one side of the workpiece support plate 1, two grinding wheel assemblies 2 inside the rotating assembly 3, and a plurality of guide wheels 5 on the other side of the workpiece support plate 1.

[0040] The rotating assembly 3 includes a rotary table 301, an arc-shaped clamping plate 302, a rotating shaft 303, a movable baffle 304, and a stepper motor 308. The rotary table 301 is movably mounted on one side of the workpiece pallet 1. The rotating shaft 303 is fixedly connected inside the rotary table 301. Arc-shaped clamping plates 302 are fixedly mounted on both sides of the rotary table 301. Movable baffles 304 are movably mounted on the outer ends of the arc-shaped clamping plates 302. A stepper motor 308 is provided on the rear side of the rotary table 301. The output end of the stepper motor 308 is connected to one end of the rotating shaft 303 through a coupling.

[0041] By cooperating with the grinding wheel assembly 2 and the rotating assembly 3, when the grinding wheel 201 needs maintenance, the positions of the two grinding wheels 201 can be exchanged by rotating the rotating assembly 3. This allows the operator to perform grinding on the second grinding wheel 201 while maintaining the first grinding wheel 201, thus avoiding downtime during grinding wheel 201 maintenance and reducing production efficiency.

[0042] The rotating assembly 3 also includes an arc-shaped plug plate 305, an arc-shaped plug groove 306, and a threaded hole 307. An arc-shaped plug plate 305 is fixedly installed on one end of the movable baffle 304. An arc-shaped plug groove 306 is provided on the side of the arc-shaped clamping plate 302 near the movable baffle 304. The arc-shaped plug plates 305 are movably inserted into the interior of the arc-shaped plug groove 306. Three threaded holes 307 are provided on the outer surface of both the arc-shaped plug plate 305 and the arc-shaped clamping plate 302. The arc-shaped plug plate 305 and the arc-shaped clamping plate 302 are connected by bolt threads.

[0043] By cooperating with the movable baffle 304 and the arc-shaped plug plate 305, when the grinding wheel 201 is disassembled during use, the bolt in the threaded hole 307 can be removed and the movable baffle 304 can be rotated out to release the restriction on the grinding wheel 201. This facilitates the disassembly of the grinding wheel 201 and also prevents workers from coming into contact with the grinding wheel 201 during disassembly, which could lead to burns or abrasions.

[0044] The grinding wheel assembly 2 includes a grinding wheel 201, a grinding wheel shaft 202, a connecting rod 203, a sliding groove 204, a cross-shaped limiting groove 205, a limiting buckle 206, and a compression spring 207. The grinding wheels 201 are movably installed inside the arc-shaped clamping plate 302. The grinding wheel shaft 202 is fixedly installed inside the grinding wheel 201. The two ends of the grinding wheel shaft 202 are provided with sliding grooves 204. The sliding grooves 204 are provided with cross-shaped limiting grooves 205. The two ends of the grinding wheel shaft 202 are slidably installed with connecting rods 203. The connecting rods 203 are slidably inserted into the sliding grooves 204. The outer surface of the connecting rods 203 is fixedly installed with limiting buckles 206. The limiting buckles 206 are slidably inserted into the cross-shaped limiting grooves 205. A compression spring 207 is movably installed between the connecting rods 203 and the sliding grooves 204.

[0045] By replacing the grinding wheel 201, the device can be used to replace the grinding wheel 201 every two hundred grinding cycles, thereby improving the cylindricity and roundness of the workpiece 11 after grinding. This results in better cylindricity and roundness of the workpiece 11, as well as higher stability, and reduces torque slippage during subsequent assembly of the workpiece 11.

[0046] The rotating assembly 3 has a base 4 at the bottom of both the front and rear sides. Two guide rails 6 are fixedly installed on the top of each base 4. A sliding plate 7 is slidably installed on the top of each guide rail 6. A servo motor 8 is fixedly installed on the top of one sliding plate 7, and a rotating shaft fixing table 9 is fixedly installed on the top of the other sliding plate 7. The output end of the servo motor 8 is connected to a connecting shaft 10 through a coupling. The outer end of the rotating shaft fixing table 9 is rotatably connected to the connecting shaft 10.

[0047] The outer end of the connecting shaft 10 is provided with a connecting groove 12. The inside of the connecting groove 12 is provided with three spring grooves 13. A pressing plate 15 is slidably installed inside the spring groove 13. A compression spring 14 is movably installed between the pressing plate 15 and the inside of the spring groove 13.

[0048] Both the stepper motor 308 and the rotating shaft 303 are rotatably connected to the base 4 via a support frame. Both ends of the guide wheel 5 are rotatably connected to support frames. A geared motor is provided on one side of the guide wheel 5. The output end of the geared motor is connected to the shaft of the guide wheel 5 via a coupling.

[0049] Both connecting rods 203 near the workpiece support plate 1 are slidably inserted into the interior of the connecting groove 12, and the surface of the extrusion plate 15 is in contact with the surface of the connecting rods 203.

[0050] A cylinder is provided on one side of the guide rail 6, and the cylinder pushes the sliding plate 7 to slide on the surface of the guide rail 6.

[0051] The top of the workpiece support plate 1 is provided with a workpiece 11, and the two side surfaces of the workpiece 11 are respectively attached to the surfaces of the grinding wheel 201 and the guide wheel 5.

[0052] A grinding method for a high-precision centerless grinding wheel for shafts, the grinding method comprising the following steps:

[0053] Step A: First, drive the guide wheel 5 to rotate via the geared motor, and drive the connecting shaft 10 to rotate via the servo motor 8. This causes the connecting shaft 10 to drive the connecting rod 203 to rotate, which in turn drives the grinding wheel shaft 202 to rotate, causing the grinding wheel 201 to rotate as well. Keep the guide wheel 5 and the grinding wheel 201 rotating in the same direction but at different speeds. At this time, place the workpiece 11 on the surface of the workpiece tray 1. The workpiece 11 will rotate as well due to the rotation of the guide wheel 5, and thus move along the direction of the workpiece tray 1. When the workpiece 11 moves to the position of the grinding wheel 201, the workpiece 11 will be ground by the grinding wheel 201.

[0054] Step B: After the workpiece 11 is ground, it will move along the direction of the workpiece support plate 1 until it is unloaded. When the grinding wheel 201 has been ground 200 times, the servo motor 8 is stopped first, and the sliding plate 7 is driven by the cylinder to slide on the surface of the guide rail 6, so that the connecting shaft 10 is disconnected from the grinding wheel shaft 202. Then the stepper motor 308 can be started, so that the stepper motor 308 drives the rotating shaft 303 to rotate, and then the rotating shaft 303 drives the rotating table 301 to rotate. At this time, the rotating table 301 will drive the arc-shaped clamping plate 302 to rotate 180 degrees, so that the two grinding wheels 201 exchange positions, and the workpiece 11 is ground by the new grinding wheel 201. At this time, the old grinding wheel 201 can be removed from the surface of the rotating table 301 for replacement.

[0055] Step C: When it is necessary to remove the grinding wheel 201, first remove the bolt inside the threaded hole 307 connecting the movable baffle 304 on the outer side and the arc-shaped clamping plate 302. Then rotate the movable baffle 304 along the axial direction of the grinding wheel 201 so that the arc-shaped insertion plate 305 rotates out from the inside of the arc-shaped insertion groove 306, thereby removing the movable baffle 304 and the arc-shaped insertion plate 305. At this time, the old grinding wheel 201 can be removed from the inside of the arc-shaped clamping plate 302 and repaired.

[0056] Step D: After the old grinding wheel 201 has been repaired, it can be inserted into the inner side of the outer arc-shaped clamping plate 302, and the movable baffle 304 can be installed back in its original position to clamp the grinding wheel 201 and prevent it from falling off. This continues until the new grinding wheel 201 has been used for 200 grinding cycles. Then, the cylinder drives the sliding plate 7 to slide on the surface of the guide rail 6, disengaging the connecting shaft 10 from the grinding wheel shaft 202. Subsequently, the stepper motor 308 is started to drive the rotary table 301 to rotate, thereby exchanging the positions of the two grinding wheels 201. Simultaneously, the cylinder drives the sliding plate 7 to slide on the surface of the guide rail 6, causing the connecting rod 203 to be inserted into the interior of the connecting groove 12. At this time, the connecting rod 203 will impact the surface of the extrusion plate 15 and cause the extrusion plate 15 to retract into the interior of the spring groove 13. When the connecting rod 203 is fully inserted into the interior of the connecting groove 12, the extrusion plate 15 will be ejected by the elastic potential energy of the compression spring 14 and will lock the connecting rod 203, thereby connecting the connecting rod 203 with the connecting shaft 10. The workpiece 11 can be ground by driving the grinding wheel 201 to rotate through the servo motor 8.

[0057] Reference Appendix Figure 8 and attached Figure 9 By taking one piece of material every 30 pieces (number of workpieces processed) during the processing, the cylindricity and roundness data were measured. Data analysis showed a positive linear correlation between the number of coreless grinding processes and the cylindricity and roundness. That is, the fewer the number of processing times, the smaller the cylindricity and roundness, and the cylindricity and roundness increased significantly after the 200th processing time.

[0058] Reference Appendix Figure 10 After assembling the measured shaft into the rotating shaft, the shaft torque was tested, and the maximum torque difference was recorded. Data analysis revealed a positive linear correlation between the maximum torque difference and the number of centerless grinding processes; that is, the smaller the cylindricity / roundness, the smaller the maximum torque difference. Therefore, it can be concluded that the maximum torque difference is also positively correlated with the number of centerless grinding processes.

[0059] Reference Appendix Figure 11 and attached Figure 12After confirming an increase in cylindricity and roundness after 200 cycles of centerless grinding, the grinding wheel 201 was repaired after the 200th cycle. The cylindricity and roundness of the shaft were then measured after the repair. Data analysis showed that repairing the grinding wheel 201 significantly improved cylindricity and roundness. The improved cylindricity and roundness were both less than 3µm.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision centerless grinding wheel for shafts, comprising a workpiece support plate (1), characterized in that: The workpiece tray (1) is provided with a rotating assembly (3) on one side, and two grinding wheel assemblies (2) are provided inside the rotating assembly (3). The workpiece tray (1) is provided with multiple guide wheels (5) on the other side. The rotating assembly (3) includes a rotating table (301), an arc-shaped clamping plate (302), a rotating shaft (303), a movable baffle (304), and a stepper motor (308). The rotating table (301) is movably installed on one side of the workpiece support plate (1). The rotating shaft (303) is fixedly connected inside the rotating table (301). Arc-shaped clamping plates (302) are fixedly installed on both sides of the rotating table (301). Movable baffles (304) are movably installed on the outer ends of the arc-shaped clamping plates (302). A stepper motor (308) is provided on the rear side of the rotating table (301). The output end of the stepper motor (308) is connected to one end of the rotating shaft (303) through a coupling. The rotating assembly (3) further includes an arc-shaped plug plate (305), an arc-shaped plug groove (306), and a threaded hole (307). An arc-shaped plug plate (305) is fixedly installed on one end of the movable baffle (304). An arc-shaped plug groove (306) is provided on the side of the arc-shaped clamping plate (302) near the movable baffle (304). The arc-shaped plug plates (305) are movably inserted into the interior of the arc-shaped plug groove (306). The outer surfaces of the arc-shaped plug plates (305) and the arc-shaped clamping plate (302) are provided with three threaded holes (307). The arc-shaped plug plates (305) and the arc-shaped clamping plate (302) are connected by bolt threads. The grinding wheel assembly (2) includes a grinding wheel (201), a grinding wheel shaft (202), a connecting rod (203), a sliding groove (204), a cross-shaped limiting groove (205), a limiting buckle (206), and a compression spring (207). The grinding wheels (201) are all movably mounted inside the arc-shaped clamping plate (302). A grinding wheel shaft (202) is fixedly installed inside each grinding wheel (201). Both ends of the grinding wheel shaft (202) are provided with sliding grooves (204). The sliding grooves (204)... Each part is provided with a cross-shaped limiting groove (205). Both ends of the grinding wheel shaft (202) are slidably installed with connecting rods (203). The connecting rods (203) are slidably inserted into the sliding groove (204). The outer surface of the connecting rods (203) is fixedly installed with limiting buckles (206). The limiting buckles (206) are slidably inserted into the cross-shaped limiting groove (205). A compression spring (207) is movably installed between the connecting rods (203) and the sliding groove (204). The rotating assembly (3) has a base (4) on both the front and rear sides near the bottom. Two guide rails (6) are fixedly installed on the top of each base (4). A sliding plate (7) is slidably installed on the top of each guide rail (6). A servo motor (8) is fixedly installed on the top of one of the sliding plates (7), and a rotating shaft fixing table (9) is fixedly installed on the top of the other sliding plate (7). The output end of the servo motor (8) is connected to a connecting shaft (10) through a coupling. The outer end of the rotating shaft fixing table (9) is rotatably connected to the connecting shaft (10).

2. The high-precision centerless grinding wheel for shafts according to claim 1, characterized in that: The outer end of each connecting shaft (10) is provided with a connecting groove (12), and the interior of each connecting groove (12) is provided with three spring grooves (13). Each spring groove (13) is slidably installed with a pressing plate (15), and a compression spring (14) is movably installed between the pressing plate (15) and the interior of the spring groove (13).

3. The high-precision centerless grinding wheel for shafts according to claim 2, characterized in that: The stepper motor (308) and the rotating shaft (303) are rotatably connected to the base (4) through the support frame. Both ends of the guide wheel (5) are rotatably connected to the support frame. A reduction motor is provided on one side of the guide wheel (5). The output end of the reduction motor is connected to the axis of the guide wheel (5) through a coupling.

4. The high-precision centerless grinding wheel for shafts according to claim 3, characterized in that: The two connecting rods (203) near the workpiece support plate (1) are slidably inserted into the interior of the connecting groove (12), and the surface of the extrusion plate (15) is in contact with the surface of the connecting rod (203).

5. The high-precision centerless grinding wheel for shafts according to claim 4, characterized in that: A cylinder is provided on one side of each guide rail (6), and the cylinder pushes the sliding plate (7) to slide on the surface of the guide rail (6).

6. The high-precision centerless grinding wheel for shafts according to claim 5, characterized in that: The top of the workpiece tray (1) is provided with a workpiece (11), and the two sides of the workpiece (11) are respectively attached to the surfaces of the grinding wheel (201) and the guide wheel (5).

7. A grinding method for a high-precision centerless grinding wheel for shafts according to claim 6, characterized in that: The grinding method includes the following steps: Step A: First, drive the guide wheel (5) to rotate through the geared motor, and drive the connecting shaft (10) to rotate through the servo motor (8). This causes the connecting shaft (10) to drive the connecting rod (203) to rotate, which in turn drives the grinding wheel shaft (202) to rotate through the connecting rod (203), causing the grinding wheel (201) to rotate as well. Keep the guide wheel (5) and the grinding wheel (201) rotating in the same direction but at different speeds. At this time, place the workpiece (11) on the surface of the workpiece tray (1). The workpiece (11) will rotate as well due to the rotation of the guide wheel (5), which will cause the workpiece (11) to move along the direction of the workpiece tray (1). When the workpiece (11) moves to the position of the grinding wheel (201), the workpiece (11) will be ground by the grinding wheel (201). Step B: After the workpiece (11) is ground, it will move along the direction of the workpiece tray (1) until it is unloaded. When the grinding wheel (201) has been ground 200 times, the servo motor (8) will be stopped first, and the sliding plate (7) will be driven by the cylinder to slide on the surface of the guide rail (6) so that the connecting shaft (10) is disconnected from the grinding wheel shaft (202). Then the stepper motor (308) can be started so that the stepper motor (308) drives the rotating shaft (303) to rotate, and then the rotating shaft (303) drives the rotating table (301) to rotate. At this time, the rotating table (301) will drive the arc-shaped clamping plate (302) to rotate 180 degrees so that the two grinding wheels (201) can be interchanged. The workpiece (11) can be ground by the new grinding wheel (201). At this time, the old grinding wheel (201) can be removed from the surface of the rotating table (301) for replacement. Step C: When it is necessary to remove the grinding wheel (201), first remove the bolt inside the threaded hole (307) connecting the movable baffle (304) on the outside and the arc-shaped clamping plate (302). Then rotate the movable baffle (304) along the axis of the grinding wheel (201) so that the arc-shaped plug plate (305) rotates out from the inside of the arc-shaped plug groove (306), thereby removing the movable baffle (304) and the arc-shaped plug plate (305). At this time, the old grinding wheel (201) can be removed from the inside of the arc-shaped clamping plate (302) and repaired. Step D: After the old grinding wheel (201) is repaired, it can be inserted into the inner side of the outer arc-shaped clamping plate (302), and the movable baffle (304) is installed back in its original position so that the movable baffle (304) clamps the grinding wheel (201) to prevent the grinding wheel (201) from falling off. After the new grinding wheel (201) has been ground 200 times, the sliding plate (7) is driven by the cylinder to slide on the surface of the guide rail (6) so that the connecting shaft (10) is disconnected from the grinding wheel shaft (202). Then, the stepper motor (308) is started to drive the rotary table (301) to rotate, thereby exchanging the positions of the two grinding wheels (201). At the same time, the starting... The cylinder drives the sliding plate (7) to slide on the surface of the guide rail (6), so that the connecting rod (203) is inserted into the interior of the connecting groove (12). At this time, the connecting rod (203) will hit the surface of the extrusion plate (15) and cause the extrusion plate (15) to retract into the interior of the spring groove (13). When the connecting rod (203) is fully inserted into the interior of the connecting groove (12), the extrusion plate (15) will be ejected by the elastic potential energy of the compression spring (14) and the connecting rod (203) will be stuck, so that the connecting rod (203) is connected to the connecting shaft (10). The workpiece (11) can be ground by the grinding wheel (201) driven by the servo motor (8).

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