A polishing machine

Abstract

The present application belongs to the technical field of polishing machine, especially relates to a polishing machine, which comprises a frame body, a polishing wheel driving motor, a polishing wheel, a clamp assembly, a translation assembly and a lifting assembly, the polishing wheel driving motor is connected with the translation assembly, the polishing wheel is drivingly connected at the output end of the polishing wheel driving motor, and the translation assembly can drive the polishing wheel driving motor and the polishing wheel to move horizontally; the clamp assembly comprises a clamp body and a clamp base, the clamp body is provided with a clamping groove for loading a workpiece, and the lifting assembly can drive the clamp base to move up and down; the synthetic displacement curve of the horizontal displacement of the polishing wheel and the up-and-down displacement of the clamp assembly is consistent with the surface arc of the surface to be polished of the workpiece, so that the polishing wheel can comprehensively polish the surface to be polished of the workpiece. The translation assembly and the lifting assembly are both machine operations, without manual intervention, can stably polish the workpiece in all directions, and improve the polishing efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of polishing machines, in particular to a polishing machine. BACKGROUND

[0002] The polishing machine is a device that removes the paint surface pollution, oxidation layer and shallow marks of the workpiece by the mutual friction between the high-speed rotating polishing wheel and the surface to be polished of the workpiece.

[0003] The existing polishing machine comprises a frame body, a driving motor, a polishing wheel and a clamp, the driving motor is connected to the frame body, the polishing wheel is connected to the output shaft of the driving motor, the clamp is separately arranged with the frame body, and the workpiece to be polished is fixed on the clamp.

[0004] When using the above-mentioned polishing machine for handheld polishing operation, the operator needs to adjust the position of the polishing wheel at any time to ensure the effective contact between the polishing wheel and the workpiece, which is low in polishing efficiency, and long-time operation also easily causes the operator's arm to ache, which not only affects the polishing accuracy, but also has safety hazards. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a polishing machine for the low polishing efficiency of the existing polishing machine.

[0006] To solve the above technical problems, the present application provides a polishing machine, which comprises a frame body, a polishing wheel driving motor, a polishing wheel, a clamp assembly, a translation assembly and a lifting assembly, the translation assembly is connected to the frame body, the polishing wheel driving motor is connected to the translation assembly, the polishing wheel is drivingly connected to the output end of the polishing wheel driving motor, and the translation assembly can drive the polishing wheel driving motor and the polishing wheel to move horizontally.

[0007] The lifting assembly is connected to the frame body, the clamp assembly comprises a clamp body and a clamp base, the clamp body is provided with a clamping groove for loading the workpiece, the clamp base is connected to the lifting assembly, and the lifting assembly can drive the clamp base to move up and down.

[0008] The combined displacement curve of the horizontal displacement of the polishing wheel and the up-down displacement of the clamp assembly is consistent with the surface arc line of the surface to be polished of the workpiece, so that the polishing wheel can fully polish the surface to be polished of the workpiece.

[0009] Optionally, the lifting assembly comprises a lifting driving unit and a floating unit, the floating unit comprises a fixed plate, a moving plate and a floating member, the clamp base is connected with the moving plate, the fixed plate and the moving plate are connected at two ends of the floating member respectively, the fixed plate is connected with the lifting driving unit, and the lifting driving unit can drive the fixed plate to move up and down to drive the whole floating unit to move up and down.

[0010] The floating member can be driven to move up by the elastic force when the surface to be polished of the workpiece appears concave, and the floating member can be compressed by the workpiece when the surface to be polished of the workpiece appears convex, so that the surface to be polished of the workpiece is always in contact with the polishing wheel.

[0011] Optionally, the floating member comprises a lifting cylinder and a pushing seat, the lifting cylinder body is connected with the fixed plate, the pushing seat is connected at the top end of the lifting piston rod of the lifting cylinder, and the lifting cylinder can drive the pushing seat to move up to a certain extent by the tension between gas molecules in the lifting cylinder body when the gas pressure in the lifting cylinder body is constant.

[0012] Optionally, the floating unit further comprises a first sliding seat and a first sliding groove, the first sliding groove is connected with the lifting driving unit, the first sliding seat is connected with the moving plate, the first sliding seat is provided with a first sliding rail extending in the up-down direction, and the first sliding rail is slidingly arranged in the first sliding groove.

[0013] Optionally, the floating unit further comprises an oil pressure buffer and a connecting rod, the oil pressure cylinder body of the oil pressure buffer is connected with the fixed plate, one end of the connecting rod is connected with the moving plate, the other end of the connecting rod is provided with a guide hole, and the oil pressure piston rod of the oil pressure buffer is slidingly inserted into the guide hole.

[0014] Optionally, the floating unit further comprises a pressure sensor and an alarm device, the pressure sensor is connected between the pushing seat and the moving plate, used for detecting the pressure between the fixed plate and the moving plate, the alarm device is signal connected with the pressure sensor, and used for sending an alarm signal when the pressure between the moving plate and the fixed plate exceeds the set range.

[0015] Optionally, the pushing seat comprises a pushing part, a transition part and a connecting part, the transition part is connected between the pushing part and the connecting part, and the connecting part is connected with the lifting piston rod; the cross-sectional area of the pushing part and the connecting part is greater than that of the transition part, so as to form a clamping groove on both sides of the transition part.

[0016] The floating unit further comprises a clamping member, the clamping member comprises two clamping feet, the two clamping feet are connected to the moving plate oppositely, the pressure sensor is located in a clamping space surrounded by the moving plate and the two clamping feet, the bottom ends of the two clamping feet are provided with clamping hooks for clamping in the clamping groove, and the fixed plate can push the pusher seat to rise so that the pusher seat pushes the pressure sensor.

[0017] Optionally, the lifting driving unit comprises a lifting seat, a lifting plate and a lifting mechanism, the lifting seat is connected to the lifting plate, and the lifting mechanism is connected to the frame body.

[0018] The lifting mechanism comprises a lifting driving motor, a lifting lead screw, a lifting nut sleeve, a lifting mechanism base, a second sliding seat and a second sliding rail, the lifting mechanism base is connected to the frame body, the lifting driving motor is connected to the lifting mechanism base, the lifting lead screw is transmissionally connected to the output end of the lifting driving motor, the lifting nut sleeve is screwed on the lifting lead screw, and the lifting seat is connected to the lifting nut sleeve.

[0019] The second sliding rail is connected to the lifting mechanism base and extends in the up-down direction, the second sliding seat is connected to the lifting seat, and the second sliding seat is provided with a second sliding groove, and the second sliding rail is slidingly connected in the second sliding groove.

[0020] Optionally, the translation assembly comprises a translation mechanism and a translation seat, the polishing wheel driving motor is connected to the translation seat, and the translation mechanism can drive the translation seat to drive the polishing wheel driving motor to move horizontally.

[0021] The translation mechanism comprises a translation mechanism base, a translation driving motor, a translation lead screw, a translation nut sleeve, a third sliding seat and a third sliding rail, the translation mechanism base is connected to the frame body, the translation driving motor is connected to the translation mechanism base, the translation lead screw is transmissionally connected to the output end of the translation driving motor, the translation nut sleeve is screwed on the translation lead screw, and the translation seat is connected to the translation nut sleeve.

[0022] The third sliding rail is connected to the translation mechanism base and extends horizontally, the third sliding seat is connected to the translation seat, the third sliding seat is provided with a third sliding groove, and the third sliding rail is guidingly assembled in the third sliding groove.

[0023] Optionally, the clamp assembly further comprises a positioning clamping jaw, a guide rod and a clamping jaw driving part, the guide rod is connected to the clamp body, and the guide rod is located on the side surface of the clamp body.

[0024] The wall of the clamping groove is provided with an avoiding hole, the positioning clamping jaw comprises a positioning foot and a main body part, the positioning foot is connected with the main body part, the main body part is provided with a mounting hole, the guide rod is guided and inserted in the mounting hole, and the clamping jaw driving part can drive the main body part to move along the axial direction of the guide rod, so that the positioning foot clamps the workpiece in the clamping groove through the avoiding hole.

[0025] According to the polishing machine provided by the embodiment of the present application, the translation assembly drives the polishing wheel driving motor and the polishing wheel to move horizontally, and the lifting assembly drives the clamp assembly to move up and down, so as to simulate the operation of the operator holding the polishing wheel to polish the workpiece. Different from the operator, the translation assembly and the lifting assembly are machine operations, and do not need manual intervention, which not only saves the labor cost and reduces the safety hazard, but also can perform the polishing operation on the workpiece in a full range and stably, and improves the polishing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0027] Figure 2 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 1 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0028] Figure 3 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 2 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0029] Figure 4 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 1 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0030] Figure 5 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 4 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0031] Figure 6 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 1 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0032] Figure 7 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure. Figure 1 The structure schematic view of the polishing machine provided by the embodiment of the present application is shown in the figure.

[0033] The reference numerals in the accompanying drawings are as follows: 1. Polishing wheel drive motor; 2. Polishing wheel; 3. Frame; 4. Translation assembly; 5. Fixture assembly; 6. Lifting assembly; 7. Lifting drive unit; 8. Floating unit; 9. Lifting drive motor; 10. Lifting seat; 11. Lifting cover; 12. Lifting mechanism base; 13. Lifting screw; 14. Lifting nut sleeve; 15. Second slide block; 16. Second slide rail; 17. Second slide groove; 18. Translation seat; 19. Translation mechanism base; 20. Translation drive motor; 21. Translation cover; 22. Translation screw; 23. Translation nut sleeve; 24. Third slide block; 25. Third slide groove; 26. Third slide rail; 27. Fixture base; 28. Fixture body. 29. Mounting slot; 30. Clearance hole; 31. Positioning gripper; 32. Main body; 33. Positioning foot; 34. Gripper drive component; 35. Workpiece; 36. Lifting plate; 37. Moving plate; 38. Fixed plate; 39. Lifting drive motor; 40. Lifting cylinder; 41. Lifting piston rod; 42. Pushing seat; 43. Connecting part; 44. Pushing part; 45. Transition part; 46. Snap-fit ​​foot; 47. Snap hook; 48. First slide block; 49. First slide rail; 50. First slide groove; 51. Hydraulic buffer; 52. Hydraulic cylinder; 53. Hydraulic piston rod; 54. Connecting rod; 55. Guide rod; 56. Mounting hole; 57. Scraper; 58. Pressure sensor; 59. Slot. Detailed Implementation

[0034] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0036] like Figures 1 to 7 As shown, an embodiment of the present invention provides a polishing machine, including a frame 3, a polishing wheel drive motor 1, a polishing wheel 2, a clamping assembly 5, a translation assembly 4, and a lifting assembly 6. The translation assembly 4 is connected to the frame 3, the polishing wheel drive motor 1 is connected to the translation assembly 4, and the polishing wheel 2 is drivenly connected to the output end of the polishing wheel drive motor 1. The translation assembly 4 can drive the polishing wheel drive motor 1 and the polishing wheel 2 to move horizontally.

[0037] The lifting assembly 6 is connected to the frame 3, the clamp assembly 5 comprises a clamp body 28 and a clamp base 27, the clamp body 28 is provided with a clamping groove 29 for loading a workpiece 35, the clamp base 27 is connected to the lifting assembly 6, and the lifting assembly 6 can drive the clamp base 27 to move up and down.

[0038] The combined displacement curve of the horizontal displacement of the polishing wheel 2 and the up-and-down displacement of the clamp assembly 5 is consistent with the surface arc of the surface to be polished of the workpiece 35, so that the polishing wheel 2 can polish the surface to be polished of the workpiece 35 comprehensively.

[0039] In an embodiment, the lifting assembly 6 comprises a lifting driving unit 7 and a floating unit 8, the floating unit 8 comprises a fixed plate 38, a moving plate 37 and a floating element, the clamp base 27 is connected to the moving plate 37, the fixed plate 38 and the moving plate 37 are respectively connected to two ends of the floating element, the fixed plate 38 is connected to the lifting driving unit 7, and the lifting driving unit 7 can drive the fixed plate 38 to move up and down to drive the entire floating unit 8 to move up and down.

[0040] The floating element can drive the moving plate 37 to move upward by elastic force when the surface to be polished of the workpiece 35 is concave, and the floating element can be compressed by the workpiece 35 when the surface to be polished of the workpiece 35 is convex, so that the surface to be polished of the workpiece 35 is always in contact with the polishing wheel 2. The setting of the floating element can compensate for the pressure out of range caused by the uneven surface of the workpiece 35, avoid the idling of the polishing wheel 2, and further improve the polishing efficiency.

[0041] In an embodiment, the floating element comprises a lifting cylinder and a pushing seat, the lifting cylinder body 40 of the lifting cylinder is connected to the fixed plate 38, and the pushing seat is connected to the top end of the lifting piston rod 41 of the lifting cylinder. When the gas pressure in the lifting cylinder body 40 is constant, the lifting cylinder can drive the pushing seat 42 to move upward to a certain extent by the tension between gas molecules in the lifting cylinder body 40. The lifting cylinder is used as the floating device, which can realize the elastic floating of the moving plate 37 by the physical property that gas can be compressed, and can also drive the moving plate 37 to move up and down to a certain extent by the inflation and deflation of the lifting cylinder.

[0042] In an embodiment, the floating unit 8 further comprises a first sliding seat 48 and a first sliding groove 50, the first sliding groove 50 is connected with the lifting driving unit 7, the first sliding seat 48 is connected with the moving plate 37, the first sliding seat 48 is provided with a first sliding rail 49 extending in the up-down direction, and the first sliding rail 49 is slidingly arranged in the first sliding groove 50. The sliding cooperation of the first sliding rail 49 and the first sliding groove 50 can effectively suppress the shaking of the moving, so that the moving plate 37 can move stably, and the polishing quality of the polishing machine on the workpiece 35 can be improved.

[0043] In an embodiment, the floating unit 8 further comprises an oil pressure buffer 51 and a connecting rod 54, the oil cylinder body 52 of the oil pressure buffer 51 is connected to the fixed plate 38, one end of the connecting rod 54 is connected to the moving plate 37, the other end of the connecting rod 54 is provided with a guide hole, and the oil pressure piston rod 53 of the oil pressure buffer 51 is slidingly inserted into the guide hole. The oil pressure buffer 51 can play a buffering role when the moving plate 37 is lowered, so as to avoid the moving plate 37 from being lowered too fast and colliding.

[0044] In an embodiment, the floating unit 8 further comprises a pressure sensor 58 and an alarm device, the pressure sensor 58 is connected between the pushing seat 42 and the moving plate 37, used for detecting the pressure between the fixed plate 38 and the moving plate 37, the alarm device is signal connected with the pressure sensor 58, used for sending an alarm signal when the pressure between the moving plate 37 and the fixed plate 38 exceeds the set range. The pressure sensor 58 can monitor the pressure between the moving plate 37 and the pushing seat 42 in real time, and can alarm or directly stop when the pressure between the moving plate 37 and the pushing seat 42 exceeds the range, so as to facilitate the operator to repair and troubleshoot the polishing machine as soon as possible, and avoid further damage to the polishing machine.

[0045] In an embodiment, the pushing seat 42 comprises a pushing part 44, a transition part 45 and a connecting part 43, the transition part 45 is connected between the pushing part 44 and the connecting part 43, and the connecting part 43 connects the lifting piston rod; the cross-sectional area of the pushing part 44 and the connecting part 43 is greater than that of the transition part 45, so as to form a clamping groove 59 on both sides of the transition part 45.

[0046] The floating unit 8 further comprises a clamping member, which comprises two clamping feet 46 oppositely connected to the moving plate 37, the pressure sensor 58 is located in a clamping space surrounded by the moving plate 37 and the two clamping feet 46, the bottom end of the two clamping feet 46 is provided with a clamping hook 47 for clamping in the clamping groove 59, and the fixed plate 38 can push the push rod 42 to rise so that the push rod 42 pushes the pressure sensor 58.

[0047] In an embodiment, the length of the push part 44 is less than the length of the clamping space, and the length of the clamping buckle is less than the length of the clamping groove 59, so that when the drive member drives the push rod 42 to descend, the pressure sensor 58 and the clamp base 27 descend by their own gravity, without the need for a drive member to drive them to descend, thereby reducing power consumption.

[0048] In an embodiment, the lifting driving unit 7 comprises a lifting seat 10, a lifting plate 36 and a lifting mechanism, the lifting seat 10 is connected to the lifting plate 36, and the lifting mechanism is connected to the frame 3.

[0049] The lifting mechanism comprises a lifting driving motor 9, a lifting lead screw 13, a lifting nut sleeve 14, a lifting mechanism base 12, a second sliding seat 15 and a second sliding rail 16, the lifting mechanism base 12 is connected to the frame 3, the lifting driving motor 9 is connected to the lifting mechanism base 12, the lifting lead screw 13 is drivingly connected to the output end of the lifting driving motor 9, the lifting nut sleeve 14 is screwed on the lifting lead screw 13, and the lifting seat 10 is connected to the lifting nut sleeve 14.

[0050] The second sliding rail 16 is connected to the lifting mechanism base 12 and extends in the up-down direction, the second sliding seat 15 is connected to the lifting seat 10, the second sliding seat 15 is provided with a second sliding groove 17, and the second sliding rail 16 is slidingly connected in the second sliding groove 17. The lifting seat 10 is driven to move by the lead screw and nut mechanism, the control is more accurate, the lifting seat 10 can be more accurately controlled to move, and the polishing efficiency is improved.

[0051] In an embodiment, the lifting driving unit 7 further comprises a lifting cover 11, and the lifting cover 11 covers the lifting mechanism base 12.

[0052] In an embodiment, the translation assembly 4 comprises a translation mechanism and a translation seat 18, the polishing wheel driving motor 1 is connected to the translation seat 18, and the translation mechanism can drive the translation seat 18 to move horizontally with the polishing wheel driving motor 1.

[0053] The translation mechanism comprises a translation mechanism base 19, a translation driving motor 20, a translation screw rod 22, a translation nut sleeve 23, a third sliding base 24 and a third sliding rail 26, the translation mechanism base 19 is connected with the frame body 3, the translation driving motor 20 is connected with the translation mechanism base 19, the translation screw rod 22 is drivingly connected at the output end of the translation driving motor 20, the translation nut sleeve 23 is screwed on the translation screw rod 22, and the translation base 18 is connected with the translation nut sleeve 23.

[0054] The third sliding rail 26 is connected with the translation mechanism base 19, the third sliding rail 26 extends horizontally, the third sliding base 24 is connected with the translation base 18, the third sliding base 24 is provided with a third sliding groove 25, and the third sliding rail 26 is guidedly assembled in the third sliding groove 25. The translation base 18 is driven to move by the screw nut mechanism, the control is more accurate, the translation base 18 can be more accurately controlled to move, and the polishing efficiency is further improved.

[0055] In an embodiment, the translation assembly 4 further comprises a translation cover 21, and the translation cover 21 covers the translation mechanism base 19.

[0056] In an embodiment, the clamp assembly 5 further comprises a positioning clamp jaw 31, a guide rod 55 and a clamp jaw driving part, the guide rod 55 is connected with the clamp body 28, and the guide rod 55 is located at the side of the clamp body 28.

[0057] The slot wall of the clamping groove 29 is provided with a avoiding hole 30, the positioning clamp jaw 31 comprises a positioning foot 33 and a main body part 32, the positioning foot 33 is connected with the main body part 32, the main body part 32 is provided with a mounting hole 56, the guide rod 55 is guidingly inserted into the mounting hole 56, and the clamp jaw driving part 34 can drive the main body part 32 to move along the axial direction of the guide rod 55, so that the positioning foot 33 clamps the workpiece 35 in the clamping groove 29 through the avoiding hole 30.

[0058] In an embodiment, the positioning clamp jaw 31 is provided with two, and the two positioning clamp jaws 31 are arranged at the two sides of the clamp body 28 respectively.

[0059] In an embodiment, the polishing machine further comprises a scraper 57, the scraper 57 is connected with the frame body 3, and the scraper 57 is used for trimming the surface of the polishing wheel 2, so as to ensure that the surface of the polishing wheel 2 is relatively flat.

[0060] The working principle of the polishing machine in the embodiment of the application is as follows:

[0061] In the process of polishing the workpiece 35, first, the workpiece 35 is placed in the clamping groove 29 of the clamp body 28, the positioning clamps 31 are driven by the clamp jaw driving part 34 to move along the axial direction of the guide rod 55, so that the two positioning clamps 31 clamp the workpiece 35, and then the workpiece 35 is stably placed in the clamping groove 29, and then the pressure range required for polishing and the arc formula conforming to the surface of the workpiece 35 to be polished are set, and then the polishing wheel driving motor 1, the translation driving motor 20, the lifting driving motor 9 and the lifting cylinder are opened, the polishing wheel driving motor 1 drives the polishing wheel 2 to rotate, the translation driving motor 20 drives the translation seat 18 and the polishing wheel driving motor 1 to start horizontal movement, at the same time, the lifting driving motor drives the lifting seat 10, the floating unit 8 and the clamp assembly 5 to move up and down, so that the horizontal displacement of the polishing wheel 2 and the up-down displacement of the clamp assembly 5 are consistent with the surface arc of the surface of the workpiece 35 to be polished.

[0062] When the surface to be polished is concave, the lifting cylinder pushes the lifting piston rod 41 and the pushing seat 42 to a certain extent to move up, so that the surface to be polished of the workpiece 35 is always in contact with the polishing wheel 2, and when the surface to be polished is convex, the polishing wheel 2 presses the workpiece 35, the clamp assembly 5 and the moving plate 37 to move down, so that the polishing wheel 2 can move horizontally.

[0063] When the pressure sensor 58 detects that the pressure between the moving plate 37 and the pushing seat 42 is out of range, the alarm device sends an alarm signal to alert the operator to repair and troubleshoot the polishing machine.

[0064] According to the polishing machine of the embodiment of the present application, the translation assembly 4 drives the polishing wheel driving motor 1 and the polishing wheel 2 to move horizontally, and the lifting assembly 6 drives the clamp assembly 5 to move up and down, so as to simulate the operation of the operator holding the polishing wheel 2 to polish the workpiece 35, and different from the operator, the translation assembly 4 and the lifting assembly 6 are machine operations, which do not need manual intervention, thereby saving labor cost, reducing safety hazards, and being capable of performing all-around and stable polishing operation on the workpiece 35, and improving polishing efficiency.

[0065] In other embodiments, the floating part includes a spring connected between the moving plate 37 and the fixed plate 38.

[0066] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A polishing machine, characterized in that, The assembly includes a frame (3), a polishing wheel drive motor (1), a polishing wheel (2), a clamping assembly (5), a translation assembly (4), and a lifting assembly (6). The translation assembly (4) is connected to the frame (3), the polishing wheel drive motor (1) is connected to the translation assembly (4), and the polishing wheel (2) is driven to the output end of the polishing wheel drive motor (1). The translation assembly (4) can drive the polishing wheel drive motor (1) and the polishing wheel (2) to move horizontally. The lifting assembly (6) is connected to the frame (3). The clamp assembly (5) includes a clamp body (28) and a clamp base (27). The clamp body (28) is provided with a clamping slot (29) for loading the workpiece (35). The clamp base (27) is connected to the lifting assembly (6). The lifting assembly (6) can drive the clamp base (27) to move up and down. The combined displacement curve of the horizontal displacement of the polishing wheel (2) and the vertical displacement of the fixture assembly (5) is consistent with the surface arc of the surface to be polished of the workpiece (35), so that the polishing wheel (2) can fully polish the surface to be polished of the workpiece (35). The lifting assembly (6) includes a lifting drive unit (7) and a floating unit (8). The floating unit (8) includes a fixed plate (38), a movable plate (37), and a floating component. The clamp base (27) is connected to the movable plate (37). The fixed plate (38) and the movable plate (37) are respectively connected to the two ends of the floating component. The fixed plate (38) is connected to the lifting drive unit (7). The lifting drive unit (7) can drive the fixed plate (38) to move the entire floating unit (8) up and down. The floating component can drive the moving plate (37) to move upward by elastic force when the surface to be polished of the workpiece (35) is concave, and the floating component can be driven and compressed by the workpiece (35) when the surface to be polished of the workpiece (35) is convex, so that the surface to be polished of the workpiece (35) is always in contact with the polishing wheel (2). The clamp assembly (5) further includes a positioning gripper (31), a guide rod (55) and a gripper driving component. The guide rod (55) is connected to the clamp body (28) and is located on the side of the clamp body (28). The mounting slot (29) has a clearance hole (30) on its wall. The positioning gripper (31) includes a positioning foot (33) and a main body (32). The positioning foot (33) is connected to the main body (32). The main body (32) has a mounting hole (56). The guide rod (55) is inserted into the mounting hole (56). The gripper driving component (34) can drive the main body (32) to move along the axial direction of the guide rod (55) so that the positioning foot (33) clamps the workpiece (35) in the mounting slot (29) through the clearance hole (30). The positioning gripper (31) is provided in two parts, and the two positioning grippers (31) are respectively located on both sides of the clamp body (28); The floating component includes a lifting cylinder and a pusher seat. The lifting cylinder body (40) of the lifting cylinder is connected to the fixed plate (38). The pusher seat is connected to the top of the lifting piston rod (41) of the lifting cylinder. When the internal air pressure of the lifting cylinder body (40) is constant, the lifting cylinder can push the lifting piston rod (41) by the tension between gas molecules in the lifting cylinder body (40) to drive the pusher seat (42) to rise to a certain extent. The floating unit (8) also includes a pressure sensor (58) and an alarm device. The pressure sensor (58) is connected between the push base (42) and the moving plate (37) to detect the pressure between the fixed plate (38) and the moving plate (37). The alarm device is signal-connected to the pressure sensor (58) and is used to issue an alarm signal when the pressure between the moving plate (37) and the fixed plate (38) exceeds the set range. The push base (42) includes a push part (44), a transition part (45) and a connecting part (43). The transition part (45) is connected between the push part (44) and the connecting part (43), and the connecting part (43) is connected to the lifting piston rod (41). The cross-sectional area of ​​the push part (44) and the connecting part (43) is larger than the cross-sectional area of ​​the transition part (45) to form a groove (59) on both sides of the transition part (45). The floating unit (8) also includes a mounting component, which includes two mounting feet (46). The two mounting feet (46) are connected to each other on the moving plate (37). The pressure sensor (58) is located in the mounting space formed by the moving plate (37) and the two mounting feet (46). The bottom ends of the two mounting feet (46) are provided with hooks (47) for engaging in the slots (59). The fixed plate (38) can push the push seat (42) to rise so that the push seat (42) pushes the pressure sensor (58).

2. The polishing machine according to claim 1, characterized in that, The floating unit (8) further includes a first slide block (48) and a first slide groove (50). The first slide groove (50) is connected to the lifting drive unit (7). The first slide block (48) is connected to the moving plate (37). The first slide block (48) is provided with a first slide rail (49). The first slide rail (49) extends in the vertical direction and is slidably disposed in the first slide groove (50).

3. The polishing machine according to claim 1, characterized in that, The floating unit (8) also includes a hydraulic damper (51) and a connecting rod (54). The hydraulic cylinder (52) of the hydraulic damper (51) is connected to the fixed plate (38). One end of the connecting rod (54) is connected to the moving plate (37). The other end of the connecting rod (54) is provided with a guide hole. The hydraulic piston rod (53) of the hydraulic damper (51) is slidably inserted into the guide hole.

4. The polishing machine according to claim 2, characterized in that, The lifting drive unit (7) includes a lifting seat (10), a lifting plate (36) and a lifting mechanism. The lifting seat (10) is connected to the lifting plate (36), and the lifting mechanism is connected to the frame (3). The lifting mechanism includes a lifting drive motor (9), a lifting screw (13), a lifting nut sleeve (14), a lifting mechanism base (12), a second slide block (15), and a second slide rail (16). The lifting mechanism base (12) is connected to the frame (3), the lifting drive motor (9) is connected to the lifting mechanism base (12), the lifting screw (13) is driven and connected to the output end of the lifting drive motor (9), the lifting nut sleeve (14) is screwed onto the lifting screw (13), and the lifting seat (10) is connected to the lifting nut sleeve (14). The second slide rail (16) is connected to the base (12) of the lifting mechanism. The second slide rail (16) extends in the vertical direction. The second slide block (15) is connected to the lifting block (10). The second slide block (15) is provided with a second slide groove (17). The second slide rail (16) is slidably connected in the second slide groove (17).

5. The polishing machine according to claim 1, characterized in that, The translation component (4) includes a translation mechanism and a translation seat (18). The polishing wheel drive motor (1) is connected to the translation seat (18). The translation mechanism can drive the translation seat (18) to move the polishing wheel drive motor (1) horizontally. The translation mechanism includes a translation mechanism base (19), a translation drive motor (20), a translation screw (22), a translation nut sleeve (23), a third slide block (24), and a third slide rail (26). The translation mechanism base (19) is connected to the frame (3), the translation drive motor (20) is connected to the translation mechanism base (19), the translation screw (22) is driven and connected to the output end of the translation drive motor (20), the translation nut sleeve (23) is screwed onto the translation screw (22), and the translation seat (18) is connected to the translation nut sleeve (23). The third slide rail (26) is connected to the translation mechanism base (19). The third slide rail (26) extends horizontally. The third slide block (24) is connected to the translation block (18). The third slide block (24) is provided with a third slide groove (25). The third slide rail (26) is guided and assembled in the third slide groove (25).

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