Piston system repair apparatus and method

Abstract

The application provides a piston system repairing device and method, and relates to the technical field of piston repairing. The piston system repairing device comprises a rack, a transmission assembly arranged on the rack, a plurality of placing assemblies equidistantly arranged on the transmission assembly, a horizontal plate, mounting columns, movable cavities, sliding blocks, supports, brackets, telescopic rods, springs, sliding grooves and pressing rods. The mounting columns are arranged in pairs and fixedly installed at the front and rear ends of the horizontal plate. The mounting columns are internally provided with movable cavities, and the movable cavities are internally connected with sliding blocks. The first mounting frame, the second mounting frame, the third mounting frame and the fourth mounting frame are provided with baffles, and the first hydraulic cylinder and the connecting plate are used to move downward, so that the piston shaft in the machining process is shielded, the influence between the plurality of machining positions is avoided, and the machining precision of the piston shaft is ensured.

Description

Technical Field

[0001] This invention relates to the field of piston repair technology, specifically to piston system repair equipment and repair methods. Background Technology

[0002] A piston system is a mechanical device consisting of a precisely fitted piston rod and piston cylinder. The gap between them is controlled at the micrometer level and friction can be reduced by rotation. Piston systems are widely used, but after long-term use, the surface of the piston shaft is easily damaged, resulting in a decrease in roughness. In the current technology, the repair of piston shafts is usually carried out using laser cladding technology.

[0003] When applying for this invention, the applicant searched and found that a Chinese patent disclosed "A Piston Shaft Repair System" with application number "CN202211041132.X". This patent mainly places the piston shaft on a tray body. During subsequent laser cladding, the tray body at the bottom contacts the piston shaft. As the piston shaft surface is coated, friction occurs between the piston shaft and the tray body, which affects the processing accuracy of the piston shaft. In addition, there is no shielding structure between the piston shaft at the cleaning mechanism, the first grinding mechanism, the laser cladding mechanism, and the dryer, so mutual interference is likely to occur during the processing. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a piston system repair device and repair method, solving the problems raised in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a piston system repair device, comprising a frame, a transmission assembly mounted on the frame, and multiple placement assemblies equidistantly arranged on the transmission assembly. Each placement assembly includes a horizontal plate, mounting columns, a movable cavity, a slider, a bracket, a support, a telescopic rod, a spring, a groove, and a pressure rod. Two mounting columns are fixedly installed at the front and rear ends of the horizontal plate. A movable cavity is provided inside each mounting column, and a slider is slidably connected inside the movable cavity. A support is fixedly connected to the top of the slider, and a support is fixedly connected to the top of the support. Multiple telescopic rods are equidistantly installed between the horizontal plate and the support. The number of springs is the same as the number of telescopic rods, and the springs are sleeved on the telescopic rods. Grooves are provided on both the left and right side walls of the mounting column, and pressure rods are slidably connected inside the grooves, with the pressure rods fixedly connected to the slider. The top of the frame is fixedly connected to a first mounting bracket, a second mounting bracket, a third mounting bracket, and a fourth mounting bracket. The top left and right sides of the first mounting bracket, the second mounting bracket, the third mounting bracket, and the fourth mounting bracket are slidably connected to baffles. The rear side of the baffles is fixedly connected to a connecting plate. The rear side wall of the frame is fixedly connected to a first hydraulic cylinder, and the top of the first hydraulic cylinder is fixedly connected to the connecting plate.

[0006] Preferably, a water pipe is provided on the top of the first mounting frame, a dryer is installed on the top of the second mounting frame, and a moving component is provided on the top of both the third and fourth mounting frames. A grinding block is installed below the moving component on the third mounting frame, and a laser cladding component is installed below the moving component on the fourth mounting frame.

[0007] Preferably, the moving component includes a positioning plate, a threaded rod, a sliding hole, a moving block, an electric cylinder, and a third motor. Two positioning plates are provided, and the two positioning plates are fixedly connected to the front and rear sides of the top of the third and fourth mounting brackets. The threaded rod is rotatably connected between the two positioning plates. The sliding hole is located at the middle position of the top of the third and fourth mounting brackets. The moving block is slidably connected inside the sliding hole and is threadedly connected to the threaded rod. The electric cylinder is fixedly connected to the bottom of the moving block. The third motor is fixedly connected to the front positioning plate, and the output shaft of the third motor is fixedly connected to the threaded rod.

[0008] Preferably, both the grinding block and the laser cladding part are mounted on the bottom end of the electric cylinder.

[0009] Preferably, each of the first, second, third, and fourth mounting brackets is provided with a drive assembly. The drive assembly includes a second motor, a first clamping plate, a second hydraulic cylinder, and a second clamping plate. The second motor is fixedly connected to the front sidewall of the first, second, third, and fourth mounting brackets. The first clamping plate is fixedly connected to the output shaft of the second motor. The second hydraulic cylinder is fixedly connected to the rear sidewall of the first, second, third, and fourth mounting brackets. The second clamping plate is rotatably connected to the movable end of the second hydraulic cylinder, and the first clamping plate and the second clamping plate are correspondingly arranged.

[0010] Preferably, the transmission assembly includes a first motor, a rotating shaft, a sprocket, and a chain. The first motor is fixedly connected to the front side wall of the frame. There are two rotating shafts, and both rotating shafts are rotatably connected to the inner wall of the frame. The output shaft of the first motor is fixedly connected to the right rotating shaft. The sprocket is fixedly connected to the circumferential surface of the rotating shaft. The chain is mounted on the sprocket, and a cross plate is mounted on the chain.

[0011] Preferably, the number of sprockets is four, and two sprockets are arranged in a group on two rotating shafts respectively, and the number of chains is two.

[0012] Preferably, support plates for chain support are fixedly connected to both the front and rear inner walls of the frame.

[0013] Preferably, a controller is provided on the front side wall of the frame, and a drain pipe is fixedly connected to the right side wall of the frame.

[0014] Piston system repair methods include the following specific steps: S1. First, place the piston shaft to be repaired on the leftmost bracket, then start the first motor to move the piston shaft to the bottom of the first mounting bracket. S2. Then, the second hydraulic cylinder controls the second clamping plate to cooperate with the first clamping plate to clamp it. Then, the first hydraulic cylinder controls the baffle to move down and block the left and right sides of the first mounting bracket. During the process of the baffle moving down, it squeezes the pressure rod, causing the bracket to move down and separate from the piston shaft. S3. Then, the external cleaning fluid cleans the piston shaft through the water pipe. At the same time, the second motor on the first mounting bracket controls the piston shaft to rotate. After cleaning, the spraying of cleaning fluid stops and the second motor stops working. The first hydraulic cylinder controls the baffle to move up, the bracket that loses its compression moves up, and the piston shaft is lifted again. Finally, the second hydraulic cylinder controls the second clamping plate to release the piston shaft. S4. Then the first motor works again to send the piston shaft into the second, third and fourth mounting brackets in sequence for drying, grinding and laser cladding operations. The clamping, rotation, baffle up and down movement and bracket up and down movement of the piston shaft in the second, third and fourth mounting brackets are the same as those in the first mounting bracket. Finally, the repaired piston shaft can be removed from the rightmost bracket.

[0015] (III) Beneficial Effects This invention provides a piston system repair device and repair method. It has the following beneficial effects: 1. The present invention provides baffles on the first mounting bracket, the second mounting bracket, the third mounting bracket, and the fourth mounting bracket, which move downward under the action of the first hydraulic cylinder and the connecting plate, and shield the piston shaft during the processing, thereby avoiding interference between multiple processing positions and ensuring the processing accuracy of the piston shaft.

[0016] 2. In this invention, the mounting component is provided with a mounting post, a movable cavity, a slider, a bracket, a telescopic rod, a spring, a slide groove, and a pressure rod. When the baffle moves down, the baffle will squeeze the pressure rod, thereby moving the bracket below the piston shaft down and separating the piston shaft from the bracket, thus avoiding friction between the piston shaft and the bracket during rotation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the piston system repair device proposed in this invention. Figure 2 for Figure 1 Enlarged view of the A-structure; Figure 3 This is a cross-sectional view of a portion of the placement components of the piston system repair device proposed in this invention; Figure 4 This is a rear sectional view of the piston system repair device proposed in this invention; Figure 5 for Figure 4 Enlarged view of the B-structure; Figure 6 This is a right view of the piston system repair device proposed in this invention; Figure 7 This is a top view of the piston system repair device proposed in this invention; Figure 8 This is a rear view of the piston system repair device proposed in this invention.

[0018] The components include: 1. Frame; 2. Transmission assembly; 3. Placement assembly; 4. First mounting frame; 5. Second mounting frame; 6. Third mounting frame; 7. Fourth mounting frame; 8. Baffle; 9. Drive assembly; 10. Water pipe; 11. Dryer; 12. Moving assembly; 13. First hydraulic cylinder; 14. Laser cladding part; 15. Grinding block; 16. Controller; 17. Drain pipe; 18. Connecting plate; 19. Support plate; 201. First motor; 202. Rotating shaft; 203. Sprocket; 204. 1. Chain; 301. Horizontal plate; 302. Mounting column; 303. Movable cavity; 304. Slider; 305. Bracket; 306. Support; 307. Telescopic rod; 308. Spring; 309. Slide groove; 310. Pressure rod; 901. Second motor; 902. First clamping plate; 903. Second hydraulic cylinder; 904. Second clamping plate; 1201. Positioning plate; 1202. Threaded rod; 1203. Sliding hole; 1204. Moving block; 1205. Electric cylinder; 1206. Third motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: like Figure 1-8 As shown, this embodiment of the invention provides a piston system repair device, including a frame 1. A transmission component 2 is provided on the frame 1, and multiple placement components 3 are arranged at equal intervals on the transmission component 2. The placement components 3 include a horizontal plate 301, a mounting column 302, a movable cavity 303, a slider 304, a bracket 305, a support 306, a telescopic rod 307, a spring 308, a slide groove 309, and a pressure rod 310. The spring 308 has a sufficiently large elastic force so that the piston shaft will not move downward after being placed on the support 306. The purpose of setting the movable cavity 303, slider 304, telescopic rod 307, spring 308, slide groove 309, and pressure rod 310 is to facilitate the downward movement of the baffle 8 to press down the support 306, thereby separating the support 306 from the piston shaft and avoiding friction between the piston shaft and the support 306 during rotation.

[0021] Two mounting posts 302 are provided and fixedly installed at the front and rear ends of the horizontal plate 301. The mounting post 302 has a movable cavity 303 inside, and a slider 304 is slidably connected inside the movable cavity 303. A bracket 305 is fixedly connected to the top of the slider 304, and a bracket 306 is fixedly connected to the top of the bracket 305. Multiple telescopic rods 307 are provided and are installed at equal intervals between the horizontal plate 301 and the bracket 305. The number of springs 308 is the same as the number of telescopic rods 307, and the springs 308 are sleeved on the telescopic rods 307. Sliding grooves 309 are provided on the left and right side walls of the mounting post 302. A pressure rod 310 is slidably connected inside the sliding groove 309 and is fixedly connected to the slider 304. The top of the frame 1 is fixedly connected to a first mounting bracket 4, a second mounting bracket 5, a third mounting bracket 6, and a fourth mounting bracket 7. The cross-sectional shape of the first mounting bracket 4, the second mounting bracket 5, the third mounting bracket 6, and the fourth mounting bracket 7 is "gate" shaped. The top left and right sides of the first mounting bracket 4, the second mounting bracket 5, the third mounting bracket 6, and the fourth mounting bracket 7 are slidably connected to baffles 8. A connecting plate 18 is fixedly connected to the rear side of the baffles 8. A first hydraulic cylinder 13 is fixedly connected to the rear side wall of the frame 1, and the top of the first hydraulic cylinder 13 is fixedly connected to the connecting plate 18. The first hydraulic cylinder 13 is mainly used to control the connecting plate 18 to drive the baffles 8 to move down, and to shield the piston shaft during the processing, so as to avoid the mutual influence between multiple processing positions and ensure the processing accuracy of the piston shaft.

[0022] The top of the first mounting bracket 4 is equipped with a water pipe 10, which facilitates the delivery of external cleaning fluid and cleans the piston shaft before repair. The top of the second mounting bracket 5 is equipped with a dryer 11, which is mainly used to dry the piston shaft after cleaning. The tops of the third mounting bracket 6 and the fourth mounting bracket 7 are both equipped with moving components 12. A grinding block 15 is installed below the moving component 12 on the third mounting bracket 6, and a laser cladding component 14 is installed below the moving component 12 on the fourth mounting bracket 7.

[0023] The moving component 12 includes a positioning plate 1201, a threaded rod 1202, a sliding hole 1203, a moving block 1204, an electric cylinder 1205, and a third motor 1206. The third motor 1206 is mainly used to control the rotation of the threaded rod 1202, thereby controlling the moving block 1204 to move back and forth. The electric cylinder 1205 is mainly used to control the grinding block 15 or the laser cladding part 14 to move up and down. Both the grinding block 15 and the laser cladding part 14 are equipped with instruments for measuring distance. There are two positioning plates 1201, and the two positioning plates 1201 are fixedly connected to the front and rear sides of the top of the third mounting bracket 6 and the fourth mounting bracket 7. The threaded rod 1202 is rotatably connected between the two positioning plates 1201. The sliding hole 1203 is located at the middle position of the top of the third mounting bracket 6 and the fourth mounting bracket 7. The moving block 1204 is slidably connected inside the sliding hole 1203, and the moving block 1204 is threadedly connected to the threaded rod 1202. The electric cylinder 1205 is fixedly connected to the bottom of the moving block 1204. The third motor 1206 is fixedly connected to the front positioning plate 1201, and the output shaft of the third motor 1206 is fixedly connected to the threaded rod 1202. The grinding block 15 and the laser cladding part 14 are both installed at the bottom end of the electric cylinder 1205.

[0024] A drive assembly 9 is provided on the first mounting frame 4, the second mounting frame 5, the third mounting frame 6, and the fourth mounting frame 7. The drive assembly 9 includes a second motor 901, a first clamping plate 902, a second hydraulic cylinder 903, and a second clamping plate 904. The second motor 901 is fixedly connected to the front side wall of the first mounting frame 4, the second mounting frame 5, the third mounting frame 6, and the fourth mounting frame 7. The first clamping plate 902 is fixedly connected to the output shaft of the second motor 901. The second hydraulic cylinder 903 is fixedly connected to the rear side wall of the first mounting frame 4, the second mounting frame 5, the third mounting frame 6, and the fourth mounting frame 7. The second clamping plate 904 is rotatably connected to the movable end of the second hydraulic cylinder 903, and the first clamping plate 902 and the second clamping plate 904 are correspondingly arranged. The transmission component 2 includes a first motor 201, a rotating shaft 202, a sprocket 203, and a chain 204. The first motor 201 is fixedly connected to the front side wall of the frame 1. There are two rotating shafts 202, and both rotating shafts 202 are rotatably connected to the inner wall of the frame 1. The output shaft of the first motor 201 is fixedly connected to the right rotating shaft 202. The sprocket 203 is fixedly connected to the circumferential surface of the rotating shaft 202. The chain 204 is disposed on the sprocket 203, and a cross plate 301 is mounted on the chain 204. There are four sprockets 203, and two sprockets 203 are arranged in a group on two rotating shafts 202 respectively. There are two chains 204. Support plates 19 for supporting the chains 204 are fixedly connected to the front and rear inner walls of the frame 1, mainly supporting the chains 204 and indirectly supporting the placement component 3 and the piston shaft.

[0025] A controller 16 is installed on the front side wall of the frame 1. The controller 16 is mainly used to control the operation of the dryer 11, the laser cladding part 14, the first motor 201, the second motor 901, the third motor 1206 and the electric cylinder 1205. The power required by the equipment is provided by an external power supply system. A drain pipe 17 is fixedly connected to the right side wall of the frame 1. The inner bottom of the frame 1 is a collection tank, which is mainly used to collect cleaning waste liquid and grinding debris. The drain pipe 17 mainly discharges the waste liquid, and the debris is subsequently collected by a scraper.

[0026] Example 2: like Figure 1-8 As shown, the piston system repair method includes the following specific steps: S1. First, place the piston shaft to be repaired on the leftmost bracket 306, then start the first motor 201 to move the piston shaft to the bottom of the first mounting bracket 4. S2. Then, the second hydraulic cylinder 903 controls the second clamping plate 904 to cooperate with the first clamping plate 902 to clamp it. Then, the first hydraulic cylinder 13 controls the baffle 8 to move down and block the left and right sides of the first mounting bracket 4. During the process of the baffle 8 moving down, it squeezes the pressure rod 310, causing the bracket 306 to move down and separate from the piston shaft. S3. Then, the external cleaning fluid cleans the piston shaft through the water pipe 10. At the same time, the second motor 901 on the first mounting bracket 4 controls the piston shaft to rotate. After cleaning, the spraying of cleaning fluid stops and the second motor 901 stops working. The first hydraulic cylinder 13 controls the baffle 8 to move upward, the bracket 306 that has lost its compression moves upward, and the piston shaft is lifted again. Finally, the second hydraulic cylinder 903 controls the second clamping plate 904 to release the piston shaft. S4. Then the first motor 201 works again to send the piston shaft into the second mounting bracket 5, the third mounting bracket 6, and the fourth mounting bracket 7 in sequence for drying, grinding, and laser cladding operations. The clamping, rotation, up-and-down movement of the baffle 8, and up-and-down movement of the bracket 306 in the second mounting bracket 5, the third mounting bracket 6, and the fourth mounting bracket 7 are the same as those in the first mounting bracket 4. Finally, the repaired piston shaft can be removed from the rightmost bracket 306.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston system repair device, comprising a frame (1), wherein a transmission assembly (2) is disposed on the frame (1), characterized in that: The transmission component (2) is provided with multiple placement components (3) at equal intervals. Each placement component (3) includes a horizontal plate (301), a mounting post (302), a movable cavity (303), a slider (304), a bracket (305), a support (306), a telescopic rod (307), a spring (308), a slide groove (309), and a pressure rod (310). There are two mounting posts (302), which are fixedly installed at the front and rear ends of the horizontal plate (301). The movable cavity (303) is provided inside the mounting post (302). The slider (304) is slidably connected inside the movable cavity (303). The support (305) is fixedly connected to the top of the slider (304). The support (306) is fixedly connected to the top of the support (305). There are multiple telescopic rods (307), which are installed at equal intervals on the horizontal plate (301) and the support (305). Between the springs (308) and the telescopic rods (307), the number of springs (308) is the same as the number of telescopic rods (307), and the springs (308) are sleeved on the telescopic rods (307). The left and right side walls of the mounting column (302) are provided with sliding grooves (309). The sliding grooves (309) are slidably connected with pressure rods (310), and the pressure rods (310) are fixedly connected to the sliders (304). The top of the frame (1) is fixedly connected with a first mounting frame (4), a second mounting frame (5), a third mounting frame (6) and a fourth mounting frame (7). The top left and right sides of the first mounting frame (4), the second mounting frame (5), the third mounting frame (6) and the fourth mounting frame (7) are slidably connected with baffles (8). The rear side of the baffles (8) is fixedly connected with a connecting plate (18). The rear side wall of the frame (1) is fixedly connected with a first hydraulic cylinder (13), and the top of the first hydraulic cylinder (13) is fixedly connected to the connecting plate (18).

2. The piston system repair equipment according to claim 1, characterized in that: A water pipe (10) is provided on the top of the first mounting bracket (4), a dryer (11) is provided on the top of the second mounting bracket (5), a moving component (12) is provided on the top of the third mounting bracket (6) and the fourth mounting bracket (7), a grinding block (15) is installed below the moving component (12) on the third mounting bracket (6), and a laser cladding component (14) is installed below the moving component (12) on the fourth mounting bracket (7).

3. The piston system repair equipment according to claim 2, characterized in that: The moving component (12) includes a positioning plate (1201), a threaded rod (1202), a sliding hole (1203), a moving block (1204), an electric cylinder (1205), and a third motor (1206). Two positioning plates (1201) are provided, and the two positioning plates (1201) are fixedly connected to the front and rear sides of the top of the third mounting bracket (6) and the fourth mounting bracket (7). The threaded rod (1202) is rotatably connected between the two positioning plates (1201). The sliding hole (1204)... 3) The moving block (1204) is slidably connected to the inside of the sliding hole (1203) and the moving block (1204) is threadedly connected to the threaded rod (1202). The electric cylinder (1205) is fixedly connected to the bottom of the moving block (1204). The third motor (1206) is fixedly connected to the front positioning plate (1201), and the output shaft of the third motor (1206) is fixedly connected to the threaded rod (1202).

4. The piston system repair equipment according to claim 3, characterized in that: The grinding block (15) and the laser cladding part (14) are both installed at the bottom of the electric cylinder (1205).

5. The piston system repair equipment according to claim 1, characterized in that: A drive assembly (9) is provided on the first mounting frame (4), the second mounting frame (5), the third mounting frame (6), and the fourth mounting frame (7). The drive assembly (9) includes a second motor (901), a first clamping plate (902), a second hydraulic cylinder (903), and a second clamping plate (904). The second motor (901) is fixedly connected to the front side wall of the first mounting frame (4), the second mounting frame (5), the third mounting frame (6), and the fourth mounting frame (7). The first clamping plate (902) is fixedly connected to the output shaft of the second motor (901). The second hydraulic cylinder (903) is fixedly connected to the rear side wall of the first mounting frame (4), the second mounting frame (5), the third mounting frame (6), and the fourth mounting frame (7). The second clamping plate (904) is rotatably connected to the movable end of the second hydraulic cylinder (903), and the first clamping plate (902) and the second clamping plate (904) are correspondingly arranged.

6. The piston system repair equipment according to claim 1, characterized in that: The transmission component (2) includes a first motor (201), a rotating shaft (202), a sprocket (203), and a chain (204). The first motor (201) is fixedly connected to the front side wall of the frame (1). There are two rotating shafts (202), and both rotating shafts (202) are rotatably connected to the inner wall of the frame (1). The output shaft of the first motor (201) is fixedly connected to the right rotating shaft (202). The sprocket (203) is fixedly connected to the circumferential surface of the rotating shaft (202). The chain (204) is mounted on the sprocket (203), and a cross plate (301) is mounted on the chain (204).

7. The piston system repair equipment according to claim 6, characterized in that: The number of sprockets (203) is set to four, and two sprockets (203) are set as a group on two rotating shafts (202) respectively, and the number of chains (204) is set to two.

8. The piston system repair equipment according to claim 6, characterized in that: The frame (1) has support plates (19) fixedly connected to the front and rear inner walls for supporting the chain (204).

9. The piston system repair equipment according to claim 1, characterized in that: A controller (16) is provided on the front side wall of the frame (1), and a drain pipe (17) is fixedly connected to the right side wall of the frame (1).

10. A piston system repair method, based on the piston system repair equipment according to any one of claims 1-9, characterized in that: The specific steps include: S1. First, place the piston shaft to be repaired on the leftmost bracket (306), then start the first motor (201) to move the piston shaft to the bottom of the first mounting bracket (4); S2. Then, the second hydraulic cylinder (903) controls the second clamping plate (904) to cooperate with the first clamping plate (902) to clamp it, then the first hydraulic cylinder (13) controls the baffle (8) to move down and block the left and right sides of the first mounting bracket (4). During the downward movement of the baffle (8), the pressure rod (310) is squeezed, causing the bracket (306) to move down and separate from the piston shaft; S3. Then, the external cleaning fluid cleans the piston shaft through the water pipe (10), while the second motor (901) on the first mounting bracket (4) controls the piston shaft to rotate. After cleaning, stop spraying the cleaning fluid. When the second motor (901) stops working, the first hydraulic cylinder (13) controls the baffle (8) to move upward, the bracket (306) which has lost its compression moves upward, and the piston shaft is lifted again. Finally, the second hydraulic cylinder (903) controls the second clamping plate (904) to release the piston shaft. S4, then the first motor (201) works again and sends the piston shaft into the second mounting bracket (5), the third mounting bracket (6), and the fourth mounting bracket (7) in sequence for drying, grinding and laser cladding operations. The clamping, rotation, up and down movement of the baffle (8) and the up and down movement of the bracket (306) in the second mounting bracket (5), the third mounting bracket (6), and the fourth mounting bracket (7) are the same as the inside of the first mounting bracket (4). Finally, the repaired piston shaft can be removed from the rightmost bracket (306).

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