Rotatable multi-angle positioning and clamping device for machining sliding bearing camber surface

Abstract

The utility model discloses a rotatable multi -angle positioning clamping device is used in arc surface processing of sliding bearing relates to sliding bearing processing technical field, including processing cabinet body, the top of processing cabinet body is provided with the placement tray, the inner wall bottom ring array fixed mounting of placement tray has a plurality of bearing positioning clamping agencies, the rear of processing cabinet body is provided with the grinding mechanism, the inner wall top fixed mounting of processing cabinet body has the servo motor, the outer wall of servo motor is provided with the encoder, and the output shaft of servo motor penetrates to the top of processing cabinet body and is fixedly installed rotatory post. The utility model discloses through the mutual cooperation between servo motor, placement tray, motor, placement roll, thereby makes the arc surface processing of multiple sliding bearings can rotate and grind after positioning, and the grinding speed of the arc surface of single sliding bearing is accelerated, and simultaneously can quick link the grinding of next sliding bearing, and the model efficiency of sliding bearing has been improved.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing processing technology, specifically to a rotatable multi-angle positioning clamping device for processing the arc surface of a sliding bearing. Background Technology

[0002] Sliding bearings, also known as bushings, sleeves, or cylindrical bearings, are typically cylindrical and do not contain moving parts. They usually consist of two parts: the bearing shell and the bearing housing. After manufacturing, the curved surfaces of sliding bearings require grinding. Grinding is a necessary step to improve the surface quality of the bearing. Methods such as surface grinding and ball grinding are used to improve the surface quality of the bearing while ensuring machining accuracy. However, grinding often requires clamping and positioning the bearing. The existing technology has the following problems:

[0003] Because existing sliding bearing positioning and clamping devices can only fix the bearing body, the fixed sliding bearing can only be ground manually around its outer arc surface. At the same time, only one can be processed at a time, which leads to a reduction in processing efficiency and affects the production of sliding bearings. Utility Model Content

[0004] This invention provides a rotatable multi-angle positioning clamping device for machining the arc surface of a sliding bearing, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A rotatable multi-angle positioning and clamping device for machining the arc surface of a sliding bearing includes a machining cabinet. A placement tray is provided on the top of the machining cabinet. A plurality of bearing positioning and clamping mechanisms are fixedly installed in a circular array on the bottom inner wall of the placement tray. A grinding mechanism is provided on the rear side of the machining cabinet. A servo motor is fixedly installed on the top inner wall of the machining cabinet. An encoder is provided on the outer wall of the servo motor. The output shaft of the servo motor passes through the top of the machining cabinet and is fixedly installed with a rotating column. The top of the rotating column is fixedly connected to the center of the bottom of the placement tray.

[0007] The bearing positioning and clamping mechanism includes a U-shaped plate. Two placement rollers are movably installed between two vertical points of the U-shaped plate. A sliding bearing is placed on the top of the two placement rollers. A clamping drive plate is fixedly installed on one side of the U-shaped plate near the center of the placement plate. A drive groove is opened at the bottom of the clamping drive plate. A positive and negative threaded rod is movably installed on the left side of the inner wall of the drive groove. The right end of the positive and negative threaded rod passes through to the right side of the clamping drive plate and is fixedly installed with a clamping knob. The left and right sides of the outer wall of the positive and negative threaded rod are respectively provided with threaded walls with opposite threads. A movable plate is threadedly installed on the outer wall of each of the two threaded walls. A clamping upright wheel is movably installed on the horizontally opposite surfaces of the two movable plates. The two clamping upright wheels are respectively in contact with the lower left and right sides of the sliding bearing.

[0008] A further improvement of the present invention is that a drive compartment is provided on the left vertical side of the U-shaped plate, a motor is fixedly installed in the inner cavity of the drive compartment, the output shaft of the motor passes through the two vertical parts of the U-shaped plate and is fixedly connected to the left end of one of the two placement rollers, and a pressing and positioning mechanism is provided on the right side of the right vertical part of the U-shaped plate.

[0009] A further improvement of the present invention is that the pressing and positioning mechanism includes a protective box, which is fixedly installed on the right side of the U-shaped plate at the right vertical position. The top of the inner wall of the protective box is provided with a threaded hole that passes through its top, and a threaded rod is installed on the inner ring of the threaded hole.

[0010] A further improvement of this utility model is that: a knob is fixedly installed at the top of the threaded rod, a movable ring is movably installed on the outer wall of the knob, an L-shaped extension plate is fixedly installed on the outer wall of the movable ring near the sliding bearing, the vertical part of the L-shaped extension plate is located in the inner ring of the sliding bearing and a horizontal pressing wheel is movably installed at the bottom end, and the bottom of the horizontal pressing wheel is in contact with the bottom of the inner wall of the sliding bearing.

[0011] A further improvement of this utility model is that: a sliding rod is fixedly installed on the top of the protective box, the movable ring is slidably connected to the sliding rod, a protective rubber sleeve is fixedly installed between the bottom of the movable ring and the top of the protective box, and the threaded rod is located inside the protective rubber sleeve.

[0012] A further improvement of this utility model is that the grinding mechanism includes an L-shaped bracket, which is fixedly installed on the rear side of the processing cabinet. A hydraulic cylinder is fixedly installed at the top of the horizontal part of the L-shaped bracket. The output end of the hydraulic cylinder extends through to the bottom of the horizontal part of the L-shaped bracket and is fixedly installed with a pressure plate. A grinding motor is fixedly installed at the bottom of the pressure plate. A grinding disc is fixedly installed on the output shaft of the grinding motor. The grinding disc is located directly above one of a plurality of sliding bearings.

[0013] A further improvement of this utility model is that: guide rods are fixedly installed on the top left and right sides of the pressure plate, and the two guide rods are slidably connected to the horizontal part of the L-shaped bracket. A grinding fluid outlet pipe is fixedly installed on the front side of the vertical part of the L-shaped bracket. A nozzle is fixedly installed at the front end of the grinding fluid outlet pipe and is located on the top rear side of one of the several sliding bearings. The rear end of the grinding fluid outlet pipe extends through to the rear side of the L-shaped bracket and is connected to a pump body.

[0014] A further improvement of this utility model is that: the bottom of the placement tray has a ring array of several leakage holes that penetrate its inner cavity; a protective frame is fixedly installed on the top edge of the processing cabinet; and a waste liquid funnel that penetrates its inner cavity is fixedly installed on the left side of the protective frame.

[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0016] 1. This utility model provides a rotatable multi-angle positioning clamping device for machining the arc surface of sliding bearings. Through the cooperation between the servo motor, the placement plate, the motor, and the placement roller, the arc surface of multiple sliding bearings can be rotated and ground after positioning, which speeds up the grinding speed of the arc surface of a single sliding bearing. At the same time, it can quickly connect to the next sliding bearing for grinding, thus improving the modeling efficiency of sliding bearings.

[0017] 2. This utility model provides a rotatable multi-angle positioning and clamping device for machining the arc surface of sliding bearings. Through the cooperation between the positive and negative threaded rods, clamping knobs, moving plates, clamping upright wheels, and pressing positioning mechanisms, sliding bearings of different sizes can be positioned, clamped, and fixed, and the positioning does not affect their rotational grinding, thus improving the applicability of the positioning and clamping device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the processing cabinet of this utility model;

[0020] Figure 3 This is a schematic diagram of the bearing positioning and clamping mechanism of this utility model.

[0021] Figure 4 This is a schematic cross-sectional view of the U-shaped plate of the present invention.

[0022] Figure 5 This is a schematic diagram of the pressing and positioning mechanism of the present invention.

[0023] Figure 6This is a schematic diagram of the grinding mechanism of this utility model.

[0024] In the diagram: 1. Processing cabinet; 11. Servo motor; 111. Encoder; 12. Rotating column; 13. Protective frame; 131. Waste liquid funnel; 2. Placement tray; 21. Leakage hole; 3. Bearing positioning and clamping mechanism; 31. U-shaped plate; 311. Drive compartment; 312. Motor; 313. Pressing and positioning mechanism; 3131. Protective box; 3132. Threaded hole; 3133. Threaded rod; 3134. Knob; 3135. Moving ring; 3136. L-shaped... 3137. Extension plate; 3138. Horizontal pressing roller; 3139. Slide rod; 3130. Protective rubber sleeve; 32. Placement roller; 33. Sliding bearing; 34. Clamping drive plate; 35. Drive slide groove; 36. Positive and negative threaded rod; 37. Clamping knob; 38. Moving plate; 39. Clamping upright roller; 4. Grinding mechanism; 41. L-shaped bracket; 42. Hydraulic cylinder; 43. Pressure plate; 44. Grinding motor; 45. Grinding disc; 46. Guide rod; 47. Grinding fluid outlet pipe. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, this utility model provides a rotatable multi-angle positioning and clamping device for machining the arc surface of a sliding bearing. It includes a machining cabinet 1, a placement tray 2 on the top of the machining cabinet 1, and several bearing positioning and clamping mechanisms 3 fixedly installed in a circular array on the bottom inner wall of the placement tray 2. A grinding mechanism 4 is located on the rear side of the machining cabinet 1. A servo motor 11 is fixedly installed on the top inner wall of the machining cabinet 1, and an encoder 111 is installed on the outer wall of the servo motor 11. The output shaft of the servo motor 11 extends through to the top of the machining cabinet 1 and a rotating column 12 is fixedly installed thereon. The top of the rotating column 12 is fixedly connected to the bottom center of the placement tray 2. The bearing positioning and clamping mechanism 3 includes a U-shaped plate 31, with two placement rollers 32 movably installed between two vertical points of the U-shaped plate 31. A sliding bearing 33 is placed on the top of the two placement rollers 32. A clamping drive plate is fixedly installed on the side of the U-shaped plate 31 near the center of the placement tray 2. 34. A drive groove 35 is provided at the bottom of the clamping drive plate 34. A positive and negative threaded rod 36 is movably installed on the left side of the inner wall of the drive groove 35. The right end of the positive and negative threaded rod 36 passes through to the right side of the clamping drive plate 34 and is fixedly installed with a clamping knob 37. The left and right sides of the outer wall of the positive and negative threaded rod 36 are respectively provided with threaded walls with opposite threads. The outer walls of the two threaded walls are threaded with movable plates 38. The horizontal opposite surfaces of the two movable plates 38 are movably installed with clamping upright wheels 39. The two clamping upright wheels 39 are respectively attached to the lower left and right sides of the sliding bearing 33. A drive chamber 311 is provided at the left vertical position of the U-shaped plate 31. A motor 312 is fixedly installed in the inner cavity of the drive chamber 311. The output shaft of the motor 312 passes through to the two vertical positions of the U-shaped plate 31 and is fixedly connected to the left end of one of the two placement rollers 32. A pressing and positioning mechanism 313 is provided at the right vertical position of the U-shaped plate 31.

[0027] During processing, several sliding bearings 33 are first placed one by one on top of two placement rollers 32 between two vertical points of several U-shaped plates 31. The distance between the placement rollers 32 ensures the stability of the bottom of the sliding bearings 33. Then, by rotating the clamping knob 37, the positive and negative threaded rods 36 in the drive groove 35 of the clamping drive plate 34 are rotated. The opposite threads on the outer walls of the positive and negative threaded rods 36 are connected to the threads of the moving plate 38 to control the clamping upright wheels 39 on opposite sides at the horizontal position to move closer to each other. Finally, the two sides of the sliding bearings 33 are squeezed and fixed. The clamping upright wheels 39 are positioned below the center of the sliding bearings 33. Therefore, when the drive chamber 311... When the motor 312 inside drives one of the placement rollers 32 to rotate, causing the sliding bearing 33 to rotate, the rotational stability of the sliding bearing 33 can be maintained as the clamping upright wheel 39 rotates, so that the arc surface of the sliding bearing 33 can be ground in all directions. After the sliding bearing 33 fixed at the top of one of the U-shaped plates 31 is ground, the encoder 111 can be used to control the output shaft of the servo motor 11 to rotate at a precise angle, thereby driving the placement disk 2 fixed at the top of the rotating column 12 to rotate at a precise angle, so that the next bearing positioning clamping mechanism 3 moves to the bottom of the grinding mechanism 4 to start the grinding work of the next sliding bearing 33, and so on, to complete the grinding work of all sliding bearings 33.

[0028] like Figure 5 As shown, the pressing and positioning mechanism 313 includes a protective box 3131, which is fixedly installed on the right side of the U-shaped plate 31 at its vertical position. A threaded hole 3132 is formed at the top of the inner wall of the protective box 3131, penetrating its top. A threaded rod 3133 is threaded onto the inner ring of the threaded hole 3132. A knob 3134 is fixedly installed at the top of the threaded rod 3133. A movable ring 3135 is movably installed on the outer wall of the knob 3134. An L-shaped extension is fixedly installed on the outer wall of the movable ring 3135 near the sliding bearing 33. Plate 3136, the vertical part of L-shaped extension plate 3136 is located in the inner ring of sliding bearing 33 and a horizontal pressing wheel 3137 is movably installed at the bottom end. The bottom of the horizontal pressing wheel 3137 is in contact with the bottom of the inner wall of sliding bearing 33. A slide rod 3138 is fixedly installed on the top of protective box 3131. A movable ring 3135 is slidably connected to the slide rod 3138. A protective rubber sleeve 3139 is fixedly installed between the bottom of the movable ring 3135 and the top of protective box 3131. The threaded rod 3133 is located inside the protective rubber sleeve 3139.

[0029] To maintain the stability of the sliding bearing 33, the L-shaped extension plate 3136 can be inserted into the inner ring of the sliding bearing 33 when placing it, and then the sliding bearing 33 can be clamped. Then, rotating the knob 3134 will drive the threaded rod 3133 to descend steadily through the threaded connection with the threaded hole 3132. At the same time, the movable ring 3135, which is movably installed on the outer wall of the knob 3134, can maintain the stability of the descent through the sliding connection with the slide rod 3138. Finally, the horizontal pressing wheel 3137, which is movably installed at the bottom vertical position of the L-shaped extension plate 3136, will press and fix the bottom center of the inner ring of the sliding bearing 33. During the processing of the sliding bearing 33, the rotation of the horizontal pressing wheel 3137 will not affect its rotation. Meanwhile, the protective rubber sleeve 3139 and the protective box 3131 can effectively prevent the grinding debris from affecting the threaded rod 3133.

[0030] like Figure 6 As shown, the grinding mechanism 4 includes an L-shaped bracket 41, which is fixedly installed on the rear side of the processing cabinet 1. A hydraulic cylinder 42 is fixedly installed at the top of the horizontal position of the L-shaped bracket 41. The output end of the hydraulic cylinder 42 extends through to the bottom of the horizontal position of the L-shaped bracket 41 and is fixedly installed with a pressure plate 43. A grinding motor 44 is fixedly installed at the bottom of the pressure plate 43. A grinding disc 45 is fixedly installed on the output shaft of the grinding motor 44. The grinding disc 45 is located directly above one of the sliding bearings 33. Guide rods 46 are fixedly installed on the left and right sides of the top of the pressure plate 43. All are slidably connected to the horizontal part of the L-shaped bracket 41. A grinding fluid outlet pipe 47 is fixedly installed on the front side of the vertical part of the L-shaped bracket 41. A nozzle is fixedly installed at the front end of the grinding fluid outlet pipe 47 and is located on the top rear side of one of the sliding bearings 33. The rear end of the grinding fluid outlet pipe 47 passes through to the rear side of the L-shaped bracket 41 and is connected to the pump body. Several leakage holes 21 penetrating its inner cavity are opened in a circular array at the bottom of the placement tray 2. A protective frame 13 is fixedly installed on the top edge of the processing cabinet 1. A waste liquid funnel 131 penetrating its inner cavity is fixedly installed on the left side of the protective frame 13.

[0031] At the start of grinding, the hydraulic cylinder 42 at the top of the horizontal position of the L-shaped bracket 41 is activated, which drives the pressure plate 43 to descend stably through the sliding connection between the guide rod 46 and the L-shaped bracket 41. Finally, the grinding disc 45, which is rotated at high speed by the grinding motor 44, makes slight contact grinding on the top of the sliding bearing 33 fixed directly below. At the same time, the rotating sliding bearing 33 can quickly grind the arc-shaped surface of the sliding bearing 33 in all directions. In order to prevent debris from splashing or high temperature during grinding, the grinding fluid can be sprayed through the pump body through the grinding fluid outlet pipe 47 and the nozzle at the front end of the grinding fluid outlet pipe 47 onto the contact surface between the sliding bearing 33 being ground and the grinding disc 45. This causes the debris to flow into the inner cavity of the placement plate 2 with the grinding fluid, and fall into the inner side of the protective frame 13 through the drain hole 21, and finally be discharged through the waste liquid funnel 131.

[0032] The working principle of the rotatable multi-angle positioning clamping device for machining the arc surface of the sliding bearing will be explained in detail below.

[0033] like Figure 1-6As shown, during processing, several sliding bearings 33 are first placed one by one on top of two placement rollers 32 between two vertical points of several U-shaped plates 31. The distance between the placement rollers 32 ensures the stability of the bottom of the sliding bearings 33. Then, by rotating the clamping knob 37, the positive and negative threaded rods 36 in the drive groove 35 of the clamping drive plate 34 can be rotated. The threaded walls of the opposite threads on both sides of the outer wall of the positive and negative threaded rods 36 are connected to the threads of the moving plate 38 to control the clamping upright wheels 39 on opposite sides at the horizontal position to move closer to each other. Finally, only the two sides of the sliding bearings 33 are squeezed and fixed, and the clamping position of the clamping upright wheels 39 is below the center of the sliding bearings 33. Therefore, when the motor 312 in the drive compartment 311 drives one of the sliding bearings 33, the sliding bearings 33 can be clamped. When the placement roller 32 rotates, driving the sliding bearing 33 to rotate, the rotational stability of the sliding bearing 33 is maintained by the rotation of the clamping vertical roller 39. This allows the arc-shaped surface of the sliding bearing 33 to be ground from all directions. After the sliding bearing 33 fixed to the top of one of the U-shaped plates 31 is ground, the encoder 111 can control the output shaft of the servo motor 11 to rotate at a precise angle, thereby driving the placement plate 2 fixed to the top of the rotating column 12 to rotate at a precise angle. This causes the next bearing positioning and clamping mechanism 3 to move to the bottom of the grinding mechanism 4 to begin the grinding of the next sliding bearing 33, and so on, until all the sliding bearings 33 are ground. At the same time, in order to maintain the stability of the sliding bearing 33, the placement roller 32 can be used to grind the sliding bearing 33. At step 33, the L-shaped extension plate 3136 is inserted into the inner ring of the sliding bearing 33, and the sliding bearing 33 is clamped. Then, rotating the knob 3134 will drive the threaded rod 3133 to drive the outer wall movable ring 3135 to descend stably through the threaded connection with the threaded hole 3132. At the same time, the movable ring 3135, which is movably installed on the outer wall of the knob 3134, can maintain the stability of the descent through the sliding connection with the slide rod 3138. Finally, the horizontal pressing wheel 3137, which is movably installed at the bottom vertical position of the L-shaped extension plate 3136, is steadily driven to press and fix the bottom center of the inner ring of the sliding bearing 33. During the processing of the sliding bearing 33, the rotation of the horizontal pressing wheel 3137 does not affect its rotation. Meanwhile, the protective rubber sleeve 3139 and the protective box 3131 can effectively prevent grinding. During grinding, debris affects the threaded rod 3133. At the start of grinding, the hydraulic cylinder 42 at the top of the horizontal position of the L-shaped bracket 41 drives the pressure plate 43 to descend stably via the sliding connection between the guide rod 46 and the L-shaped bracket 41. This drives the grinding disc 45, which rotates at high speed using the grinding motor 44, to perform slight contact grinding on the top of the fixed sliding bearing 33 below. Simultaneously, the rotating sliding bearing 33 can perform rapid all-round grinding on the arc-shaped surface of the sliding bearing 33. To prevent debris from splashing or high temperature during grinding, the grinding fluid can be sprayed through the grinding fluid outlet pipe 47 and the nozzle at the front end of the grinding fluid outlet pipe 47 onto the contact surface between the sliding bearing 33 being ground and the grinding disc 45, so that the debris flows into the inner cavity of the placement disc 2 along with the grinding fluid.The liquid then flows through the leakage hole 21 into the inner side of the protective frame 13, and is finally discharged through the waste liquid funnel 131.

[0034] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A rotatable multi-angle positioning clamping device for machining the arc surface of a sliding bearing, comprising a machining cabinet (1), characterized in that: The processing cabinet (1) is provided with a placement tray (2) on the top. Several bearing positioning and clamping mechanisms (3) are fixedly installed in a ring array on the bottom inner wall of the placement tray (2). A grinding mechanism (4) is provided on the rear side of the processing cabinet (1). A servo motor (11) is fixedly installed on the top inner wall of the processing cabinet (1). An encoder (111) is provided on the outer wall of the servo motor (11). The output shaft of the servo motor (11) passes through to the top of the processing cabinet (1) and is fixedly installed with a rotating column (12). The top of the rotating column (12) is fixedly connected to the bottom center of the placement tray (2). The bearing positioning and clamping mechanism (3) includes a U-shaped plate (31). Two placement rollers (32) are movably installed between two vertical points of the U-shaped plate (31). A sliding bearing (33) is placed on the top of the two placement rollers (32). A clamping drive plate (34) is fixedly installed on one side of the U-shaped plate (31) near the center of the placement disk (2). A drive groove (35) is opened at the bottom of the clamping drive plate (34). A positive and negative threaded rod is movably installed on the left side of the inner wall of the drive groove (35). (36) The right end of the positive and negative threaded rod (36) extends through to the right side of the clamping drive plate (34) and is fixedly installed with a clamping knob (37). The left and right sides of the outer wall of the positive and negative threaded rod (36) are respectively provided with threaded walls with opposite threads, and the outer walls of the two threaded walls are threaded with movable plates (38). The horizontal opposite surfaces of the two movable plates (38) are movably installed with clamping vertical wheels (39). The two clamping vertical wheels (39) are respectively attached to the lower left and right sides of the sliding bearing (33).

2. The rotatable multi-angle positioning and clamping device for machining the arc-shaped surface of a sliding bearing according to claim 1, characterized in that: A drive compartment (311) is provided on the left vertical side of the U-shaped plate (31). A motor (312) is fixedly installed in the inner cavity of the drive compartment (311). The output shaft of the motor (312) passes through the two vertical parts of the U-shaped plate (31) and is fixedly connected to the left end of one of the two placement rollers (32). A pressing and positioning mechanism (313) is provided on the right side of the vertical part of the U-shaped plate (31).

3. The rotatable multi-angle positioning and clamping device for machining the arc surface of a sliding bearing according to claim 2, characterized in that: The pressing and positioning mechanism (313) includes a protective box (3131), which is fixedly installed on the right side of the right vertical position of the U-shaped plate (31). The top of the inner wall of the protective box (3131) is provided with a threaded hole (3132) that passes through its top. A threaded rod (3133) is installed in the inner ring of the threaded hole (3132).

4. The rotatable multi-angle positioning and clamping device for machining the arc-shaped surface of a sliding bearing according to claim 3, characterized in that: A knob (3134) is fixedly installed at the top of the threaded rod (3133). A movable ring (3135) is movably installed on the outer wall of the knob (3134). An L-shaped extension plate (3136) is fixedly installed on the side of the outer wall of the movable ring (3135) near the sliding bearing (33). The vertical part of the L-shaped extension plate (3136) is located in the inner ring of the sliding bearing (33), and a horizontal pressing wheel (3137) is movably installed at the bottom end. The bottom of the horizontal pressing wheel (3137) is in contact with the bottom of the inner wall of the sliding bearing (33).

5. A rotatable multi-angle positioning and clamping device for machining the arc-shaped surface of a sliding bearing according to claim 4, characterized in that: A slide rod (3138) is fixedly installed on the top of the protective box (3131), the movable ring (3135) is slidably connected to the slide rod (3138), a protective rubber sleeve (3139) is fixedly installed between the bottom of the movable ring (3135) and the top of the protective box (3131), and the threaded rod (3133) is located inside the protective rubber sleeve (3139).

6. The rotatable multi-angle positioning and clamping device for machining the arc-shaped surface of a sliding bearing according to claim 1, characterized in that: The grinding mechanism (4) includes an L-shaped bracket (41), which is fixedly installed on the rear side of the processing cabinet (1). A hydraulic cylinder (42) is fixedly installed at the top of the horizontal position of the L-shaped bracket (41). The output end of the hydraulic cylinder (42) extends through to the bottom of the horizontal position of the L-shaped bracket (41) and is fixedly installed with a pressure plate (43). A grinding motor (44) is fixedly installed at the bottom of the pressure plate (43). A grinding disc (45) is fixedly installed on the output shaft of the grinding motor (44). The grinding disc (45) is located directly above one of the several sliding bearings (33).

7. A rotatable multi-angle positioning and clamping device for machining the arc-shaped surface of a sliding bearing according to claim 6, characterized in that: Guide rods (46) are fixedly installed on the top left and right sides of the pressure plate (43). Both guide rods (46) are slidably connected to the horizontal part of the L-shaped bracket (41). A grinding fluid outlet pipe (47) is fixedly installed on the front side of the vertical part of the L-shaped bracket (41). A nozzle is fixedly installed at the front end of the grinding fluid outlet pipe (47) and is located on the top rear side of one of the sliding bearings (33). The rear end of the grinding fluid outlet pipe (47) extends through to the rear side of the L-shaped bracket (41) and is connected to a pump body.

8. A rotatable multi-angle positioning and clamping device for machining the arc surface of a sliding bearing according to claim 1, characterized in that: The bottom of the placement tray (2) has a ring array of several leakage holes (21) that penetrate its inner cavity. A protective frame (13) is fixedly installed on the top edge of the processing cabinet (1). A waste liquid funnel (131) that penetrates its inner cavity is fixedly installed on the left side of the protective frame (13).

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