Auxiliary equipment and method for laser cladding modification machining of inner hole of cylinder sleeve

Abstract

The invention discloses laser cladding modified machining auxiliary equipment and method for an inner hole of a cylinder sleeve, and relates to the technical field of cylinder sleeve machining, the laser cladding modified machining auxiliary equipment comprises a workbench, a clamping rotating mechanism and a cladding cleaning mechanism, the clamping rotating mechanism is arranged on one side of the workbench and used for clamping the cylinder sleeve and rotating during laser cladding, and the cladding cleaning mechanism is arranged on the other side of the workbench; the cladding cleaning mechanism is arranged on the other side of the workbench and used for cleaning an inner hole of the cylinder sleeve and a laser cladding head on the inner hole of the cylinder sleeve and cladding alloy powder on the inner wall of the cylinder sleeve. According to the laser cladding device, the cylinder sleeve is clamped and fixed through a three-jaw chuck of the clamping and rotating mechanism, and then the cylinder sleeve is rotated through the driving motor in the laser cladding process; the ceramic fiber cloth barrel can synchronously clean impurities and oxide skin in an inner hole of the cylinder sleeve before the laser cladding head carries out cladding on the cylinder sleeve, and after laser cladding on the cylinder sleeve is completed, residual attachments on the outer wall of the laser cladding head can be cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylinder liner processing, in particular to a laser cladding modification processing auxiliary equipment and method for cylinder liner inner hole. BACKGROUND

[0002] The cylinder liner of a water injection pump is a key component installed in the pump cylinder body, which cooperates with the plunger or piston to complete the work of sucking and discharging liquid. Traditional cylinder liner processing adopts surface treatment technologies such as chrome plating and nitriding, but there are problems such as insufficient plating adhesion, easy peeling, limited hardness and wear resistance of the modified layer, etc., which are difficult to meet the stringent requirements of the water injection pump on the service life and reliability of the cylinder liner.

[0003] Laser cladding technology has become the preferred solution for cylinder liner inner wall modification because it can form a high-performance cladding layer with controllable composition and strong adhesion on the substrate surface. However, in existing laser cladding processing, the oxidation scale and impurities on the surface of the cylinder liner inner hole are not cleaned in time, which affects the bonding strength of the cladding layer and the substrate. Moreover, alloy powder residues are easily attached to the laser cladding head after work, which affects the heat dissipation of the laser cladding head in the next use. SUMMARY

[0004] The purpose of the present application is to provide a laser cladding modification processing auxiliary equipment and method for cylinder liner inner hole to overcome the above-mentioned defects in the prior art.

[0005] A laser cladding modification processing auxiliary equipment for cylinder liner inner hole, comprising a workbench, a clamping and rotating mechanism, and a cladding and cleaning mechanism. The clamping and rotating mechanism is arranged on one side of the workbench and is used for clamping and rotating the cylinder liner during laser cladding. The cladding and cleaning mechanism is arranged on the other side of the workbench and is used for cleaning the cylinder liner inner hole and the laser cladding head thereon and cladding alloy powder on the inner wall of the cylinder liner.

[0006] Preferably, the clamping and rotating mechanism comprises a driving motor, a three-jaw chuck, and a driving shaft. The driving motor is installed outside the mounting box on the workbench, and a belt pulley one is installed on the output shaft of the driving motor. The three-jaw chuck is rotatably connected to the connecting box on the side of the mounting box. The driving shaft is rotatably connected to the mounting box, and one end of the driving shaft is connected to the inside of the three-jaw chuck. The other end of the driving shaft is installed with a belt pulley two. The belt pulley one is connected to the belt pulley two through a driving belt.

[0007] Preferably, the laser cladding cleaning mechanism comprises a driving screw rod, a moving motor, a moving frame and a cleaning assembly, the driving screw rod is rotationally connected to the workbench, the moving motor is installed outside the workbench and its output shaft is connected to one end of the driving screw rod, the moving frame is slidingly connected to the slide rail on the workbench and is screw-connected to the driving screw rod through a screw nut, one side of the moving frame towards the three-jaw chuck is provided with a column box, the laser cladding head is vertically arranged at the bottom of the column box, and the cleaning assembly is arranged on the column box and the laser cladding head and is used for cleaning the inner wall of the cylinder liner and the outer wall of the laser cladding head.

[0008] Preferably, the cleaning assembly comprises a worm, a scraper, a guide rod and a swing plate, both ends of the worm are rotationally connected to the fixed box on the laser cladding head, the worm is in mesh with the worm wheel rotationally connected to the upper side of the laser cladding head, the scraper is arranged at the bottom of the worm wheel and is in contact with the outer wall of the laser cladding head, the guide rod is slidingly connected to the column box and its lower end is connected with a rack through a connecting plate, the rack is in mesh with the gear at the end of the worm, the upper end of the guide rod is provided with an L-shaped rod slidingly connected to the top of the column box, a spring is arranged on the guide rod between the L-shaped rod and the column box, the swing plate corresponds to the L-shaped rod and one end thereof is hingedly connected to the mounting seat on the top of the column box through a pin shaft, the mounting seat is provided with a limiting plate for limiting the swing plate, and the other end of the swing plate is detachably connected with a ceramic fiber cloth tube.

[0009] Preferably, the end of the swing plate is provided with a bracket in the shape of a "n" character, a bolt is fastened to the bracket through a nut, and the ceramic fiber cloth tube is arranged on the bolt.

[0010] Preferably, one side of the swing plate in contact with the L-shaped rod is provided with an arc-shaped pressing block.

[0011] Preferably, the column box is coaxially arranged with the three-jaw chuck.

[0012] Preferably, the scraper is provided with a plurality of scrapers and is uniformly distributed along the circumference of the worm wheel.

[0013] A method for laser cladding modification processing of a cylinder liner inner hole, comprising the following steps: S1, clamping and fixing the cylinder liner to be processed through the clamping jaw of the three-jaw chuck; S2, starting the moving motor, the output shaft of the moving motor drives the driving screw rod to rotate, and the moving frame drives the laser cladding head to move towards the cylinder liner; S3, when the swing plate is in contact with the cylinder liner, the swing plate is rotated under the action of the cylinder liner, and the L-shaped rod and the guide rod are pressed downward in the process of the swing plate rotation, and the spring on the guide rod is compressed; S4, when the swing plate and the ceramic fiber cloth barrel are both in the cylinder sleeve hole, under the spring action on the guide rod, the elastic ceramic fiber cloth barrel at the end of the swing plate is in abutment with the hole wall of the cylinder sleeve, and the ceramic fiber cloth barrel is staggered with the nozzle of the laser cladding head, and the laser cladding head is continuously driven to move to the innermost end of the cylinder sleeve; S5, the driving motor is started, the output shaft of the driving motor drives the driving shaft to rotate through the belt pulley one, the driving belt and the belt pulley two, the driving shaft drives the cylinder sleeve on the three-jaw chuck to rotate, and the started laser cladding head accurately sprays the alloy powder to the inner wall surface of the rotating cylinder sleeve, and the alloy powder is fused with the cylinder sleeve inner wall base through laser energy, so that the modified cladding layer is formed. S6, while the cylinder sleeve is rotating, the ceramic fiber cloth barrel can scrape and clean the impurities, scale and the like on the circumferential surface of the next part of the cylinder sleeve hole which is not cladded by the laser cladding head; S7, according to the length requirement of the cylinder sleeve hole, the driving screw is slowly rotated by the movement motor, and the moving frame and the laser cladding head are uniformly fed along the cylinder sleeve axis direction; S8, when the laser cladding on the cylinder sleeve is completed, the driving motor and the laser cladding head are turned off, the swing plate and the ceramic fiber cloth barrel are moved to be separated from the cylinder sleeve, at this time, under the spring elastic force on the guide rod, the L-shaped rod is driven to move upwards, the swing plate is rotated to be in contact with the limiting plate on the mounting seat, the guide rod drives the rack to move, the gear and the worm are driven to rotate, the worm gear is rotated, and then the scraper on the bottom of the worm gear rotates outside the laser cladding head to clean the impurities remaining on the outer wall of the laser cladding head.

[0014] The beneficial effects achieved by the present application are: 1, the three-jaw chuck of the clamping and rotating mechanism is used for clamping and fixing the cylinder sleeve, and the driving motor is used for rotating the cylinder sleeve in the process of laser cladding, the ceramic fiber cloth barrel in abutment with the inner wall of the cylinder sleeve is staggered with the nozzle of the laser cladding head, so that the ceramic fiber cloth barrel synchronously cleans the impurities and scale in the cylinder sleeve hole before the laser cladding head clads the cylinder sleeve.

[0015] 2, after the laser cladding on the cylinder sleeve is completed, the swing plate and the ceramic fiber cloth barrel are moved to be separated from the cylinder sleeve, at this time, under the spring elastic force on the guide rod, the L-shaped rod is driven to move upwards, the swing plate is rotated to be in contact with the limiting plate on the mounting seat, the impurities remaining on the ceramic fiber cloth barrel are shaken and shaken off, the guide rod drives the rack to move, the rack drives the gear and the worm to rotate, the worm drives the worm gear on the laser cladding head to rotate, and then the scraper on the bottom of the worm gear rotates outside the laser cladding head to clean the impurities remaining on the outer wall of the laser cladding head. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic diagram of the present application.

[0017] Figure 2 Structure diagram of the top of the application.

[0018] Figure 3 Structure diagram of the inside of the installation box and the connecting box of the application.

[0019] Figure 4 Front view of the cladding cleaning mechanism of the application.

[0020] Figure 5 Structure diagram of the whole of the cladding cleaning mechanism of the application.

[0021] Figure 6 Structure diagram of part of the cladding cleaning mechanism of the application.

[0022] In the figure, 1, workbench; 2, clamping and rotating mechanism; 21, installation box; 22, driving motor; 221, pulley one; 23, three-jaw chuck; 24, connecting box; 25, driving shaft; 26, pulley two; 27, driving belt; 3, cladding cleaning mechanism; 31, laser cladding head; 32, driving screw rod; 33, moving motor; 34, moving frame; 35, column box; 36, cleaning assembly; 361, worm; 362, fixed box; 363, worm gear; 3631, gear; 364, scraper; 365, guide rod; 3651, connecting plate; 3652, rack; 3653, spring; 366, L-shaped rod; 367, swing plate; 3671, arc-shaped pressing block; 3672, mounting seat; 3673, limiting plate; 368, ceramic fiber cloth cylinder; 3681, support; 3682, bolt; 3683, nut; 4, cylinder sleeve. DETAILED DESCRIPTION In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification and claims of the present application and the description of the drawings are intended to cover non-exclusive inclusion.

[0024] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, nor are they necessarily all mutually exclusive or alternative embodiments.

[0025] As shown in Figures 1-6 The application provides a laser cladding modification processing auxiliary equipment for cylinder sleeve inner hole, which comprises a workbench 1, a clamping and rotating mechanism 2 and a cladding and cleaning mechanism 3. In addition, the clamping and rotating mechanism 2 is arranged on one side of the workbench 1 and is used for clamping and rotating the cylinder sleeve 4 during laser cladding. The clamping and rotating mechanism 2 comprises a driving motor 22, a three-jaw chuck 23 and a driving shaft 25. The driving motor 22 is installed outside the mounting box 21 on the workbench 1, and a belt pulley one 221 is installed on the output shaft of the driving motor 22. The three-jaw chuck 23 is rotationally connected to the connecting box 24 on the side of the mounting box 21. The driving shaft 25 is rotationally connected to the mounting box 21, and one end of the driving shaft 25 is connected to the inside of the three-jaw chuck 23. The other end of the driving shaft 25 is provided with a belt pulley two 26. The belt pulley one 221 is connected to the belt pulley two 26 through a driving belt 27. The cylinder sleeve 4 is clamped and fixed by the three-jaw chuck 23, so as to ensure that the cylinder sleeve 4 will not loosen during high-speed rotation.

[0026] In addition, the cladding and cleaning mechanism 3 is arranged on the other side of the workbench 1 and is used for cleaning the inner hole of the cylinder sleeve 4 and the laser cladding head 31 thereon and cladding alloy powder on the inner wall of the cylinder sleeve 4. The cladding and cleaning mechanism 3 comprises a driving screw 32, a moving motor 33, a moving frame 34 and a cleaning assembly 36. The driving screw 32 is rotationally connected to the workbench 1. The moving motor 33 is installed outside the workbench 1, and the output shaft of the moving motor 33 is connected to one end of the driving screw 32. The moving frame 34 is slidingly connected to the slide rail on the workbench 1 and is screw-connected to the driving screw 32 through a screw nut 3683. A column box 35 is arranged on the side of the moving frame 34 facing the three-jaw chuck 23. The column box 35 is coaxially arranged with the three-jaw chuck 23. The laser cladding head 31 is vertically arranged at the bottom of the column box 35.

[0027] Meanwhile, the cleaning assembly 36 is arranged on the column box 35 and the laser cladding head 31 and is used for cleaning the inner wall of the cylinder liner 4 and the outer wall of the laser cladding head 31. The cleaning assembly 36 comprises a worm 361, a scraper 364, a guide rod 365 and a swing plate 367. Both ends of the worm 361 are rotatably connected in a fixed box 362 on the laser cladding head 31. The worm 361 is in mesh with a worm wheel 363 rotatably connected to the upper side of the laser cladding head 31. The scraper 364 is provided with a plurality of parts, is uniformly distributed along the circumference of the worm wheel 363 and is in contact with the outer wall of the laser cladding head 31. The plurality of scrapers 364 work cooperatively to remove the adhered alloy powder and prevent the accumulation from affecting the heat dissipation of the laser cladding head 31 in the next work. The guide rod 365 is slidably connected in the column box 35 and has a rack 3652 connected to the lower end through a connecting plate 3651. The rack 3652 is in mesh with a gear 3631 at the end of the worm 361. The upper end of the guide rod 365 is provided with an L-shaped rod 366 slidably connected to the top of the column box 35. The guide rod 365 is sleeved with a spring 3653 between the L-shaped rod 366 and the column box 35. The swing plate 367 corresponds to the L-shaped rod 366 and is hingedly connected to a mounting seat 3672 on the top of the column box 35 through a pin shaft at one end. The mounting seat 3672 is provided with a limiting plate 3673 for limiting the swing plate 367. The side of the swing plate 367 in contact with the L-shaped rod 366 is provided with an arc-shaped pressing block 3671, so that the contact between the swing plate 367 and the inner wall of the cylinder liner 4 is more fitted, and the uniformity of pressure distribution is increased through the arc-shaped surface. However, the other end of the swing plate 367 is detachably connected with a ceramic fiber cloth tube 368. The end of the swing plate 367 is provided with a bracket 3681 in the shape of a "n" character. The bracket 3681 is fastened with a bolt 3682 through a nut 3683. The bolt 3682 is sleeved with the ceramic fiber cloth tube 368, so that the ceramic fiber cloth tube 368 can be quickly disassembled and replaced, and the maintenance process is simplified.

[0028] DETAILED DESCRIPTION AND PRINCIPLES S1, the cylinder liner 4 to be processed is clamped and fixed by the clamping jaw of the three-jaw chuck 23. S2, the moving motor 33 is started. The output shaft of the moving motor 33 drives the driving screw 32 to rotate, so that the moving frame 34 drives the laser cladding head 31 to move along the slide rail on the workbench 1 to the direction close to the cylinder liner 4. S3, when the swing plate 367 is in contact with the cylinder sleeve 4, the swing plate 367 is rotated under the action of the cylinder sleeve 4, the L-shaped rod 366 and the guide rod 365 are pressed downward in the process of the rotation of the swing plate 367, the spring 3653 on the guide rod 365 is compressed, the rack 3652 is driven to move, the gear 3631 and the worm 361 are rotated through the rack 3652, the worm 361 drives the worm wheel 363 on the laser cladding head 31 to rotate, so that the scraper 364 at the bottom of the worm wheel 363 rotates outside the laser cladding head 31; S4, when the swing plate 367 and the ceramic fiber cloth tube 368 both enter the hole of the cylinder sleeve 4, the elastic ceramic fiber cloth tube 368 at the end of the swing plate 367 is in abutment with the hole wall of the cylinder sleeve 4 under the action of the spring 3653 on the guide rod 365, and the ceramic fiber cloth tube 368 is staggered with the nozzle of the laser cladding head 31, the laser cladding head 31 is moved to the innermost end of the cylinder sleeve 4 under the action of the driving lead screw 32, and the laser cladding head 31 is completed in place; S5, the driving motor 22 is started, the output shaft of the driving motor 22 drives the belt pulley one 221 to rotate, the belt pulley two 26 is driven through the driving belt 27, and the driving shaft 25 connected with the belt pulley two 26 is rotated, the cylinder sleeve 4 on the three-jaw chuck 23 is rotated under the action of the driving shaft 25, and the alloy powder is accurately sprayed to the inner wall surface of the rotating cylinder sleeve 4 by the started laser cladding head 31, the alloy powder is fused with the cylinder sleeve 4 inner wall base body through laser energy, and a modified cladding layer is formed; S6, while the cylinder sleeve 4 is rotating, since the ceramic fiber cloth tube 368 is staggered with the nozzle of the laser cladding head 31, the impurities, scales and the like on the hole wall circumferential surface of the next part of the cylinder sleeve 4 which is not cladded by the laser cladding head 31 can be scraped and cleaned, and the reliable combination of the cladding layer and the cylinder sleeve 4 base body is ensured; S7, then, according to the length requirement of the hole of the cylinder sleeve 4, the moving motor 33 drives the driving lead screw 32 to rotate slowly, drives the moving frame 34 and the laser cladding head 31 to feed at a uniform speed along the axis direction of the cylinder sleeve 4, cooperates with the rotating movement of the cylinder sleeve 4, and realizes the continuous and uniform cladding of the whole length of the hole of the cylinder sleeve 4; S8, when the laser cladding head 31 completes the laser cladding of the alloy powder on the cylinder liner 4, the driving motor 22 and the laser cladding head 31 are turned off, the swing plate 367 and the ceramic fiber cloth cylinder 368 are moved to be separated from the cylinder liner 4 under the action of the driving screw 32, at this time, under the elastic force of the spring 3653 on the guide rod 365, the L-shaped rod 366 is driven to move upwards, the swing plate 367 is rotated to contact the limiting plate 3673 on the mounting seat 3672, the residual impurities on the ceramic fiber cloth cylinder 368 are shaken and shaken off, at the same time, the guide rod 365 drives the rack 3652 to move, the gear 3631 and the worm 361 are rotated through the rack 3652, the worm 361 drives the worm wheel 363 on the laser cladding head 31 to rotate, so that the scraper 364 at the bottom of the worm wheel 363 rotates outside the laser cladding head 31, and the residual impurities on the outer wall of the laser cladding head 31 are cleaned.

[0029] The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application. 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 claims of the present application.

Claims

1. An auxiliary device for laser cladding modification of cylinder liner inner bores, characterized in that: It comprises a workbench (1), a clamping and rotating mechanism (2) and a cladding and cleaning mechanism (3). The clamping and rotating mechanism (2) is arranged on one side of the workbench (1) and used for clamping and rotating the cylinder sleeve (4) during laser cladding. The cladding and cleaning mechanism (3) is arranged on the other side of the workbench (1) and used for cleaning the inner hole of the cylinder sleeve (4) and the laser cladding head (31) thereon and cladding the alloy powder on the inner wall of the cylinder sleeve (4).

2. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 1, characterized in that: The clamping and rotating mechanism (2) comprises a driving motor (22), a three-jaw chuck (23) and a driving shaft (25), the driving motor (22) is installed outside the mounting box (21) on the workbench (1) and a belt pulley one (221) is installed on the output shaft thereof, the three-jaw chuck (23) is rotatably connected to the connecting box (24) on the side of the mounting box (21), the driving shaft (25) is rotatably connected to the mounting box (21) and one end thereof is connected to the inside of the three-jaw chuck (23), the other end of the driving shaft (25) is provided with a belt pulley two (26), and the belt pulley one (221) is connected with the belt pulley two (26) through a driving belt (27).

3. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 2, characterized in that: The cladding and cleaning mechanism (3) comprises a driving screw (32), a moving motor (33), a moving frame (34) and a cleaning assembly (36), the driving screw (32) is rotatably connected to the workbench (1), the moving motor (33) is installed outside the workbench (1) and the output shaft thereof is connected with one end of the driving screw (32), the moving frame (34) is slidably connected to the slide rail on the workbench (1) and is screw-connected with the driving screw (32) through a screw nut (3683), one side of the moving frame (34) towards the three-jaw chuck (23) is provided with a column box (35), the laser cladding head (31) is vertically arranged at the bottom of the column box (35), and the cleaning assembly (36) is arranged on the column box (35) and the laser cladding head (31) and used for cleaning the inner wall of the cylinder sleeve (4) and the outer wall of the laser cladding head (31).

4. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 3, characterized in that: The cleaning assembly (36) comprises a worm (361), a scraper (364), a guide rod (365) and a swing plate (367), both ends of the worm (361) are rotatably connected in a fixed box (362) on the laser cladding head (31), the worm (361) is engaged between the laser cladding head (31) and a worm wheel (363) rotatably connected to the upper side of the laser cladding head (31), the scraper (364) is arranged at the bottom of the worm wheel (363) and is in contact with the outer wall of the laser cladding head (31), the guide rod (365) is slidably connected in a column box (35) and the lower end of the guide rod (365) is connected with a rack (3652) through a connecting plate (3651), the rack (3652) is engaged with a gear (3631) at the end of the worm (361), the upper end of the guide rod (365) is provided with an L-shaped rod (366) slidably connected with the top of the column box (35), the guide rod (365) is sleeved with a spring (3653) between the L-shaped rod (366) and the column box (35), the swing plate (367) corresponds to the L-shaped rod (366) and one end of the swing plate (367) is hingedly connected to a mounting seat (3672) on the top of the column box (35) through a pin shaft, the mounting seat (3672) is provided with a limiting plate (3673) for limiting the swing plate (367), and the other end of the swing plate (367) is detachably connected with a ceramic fiber cloth barrel (368).

5. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 4, characterized in that: The end of the swing plate (367) is provided with a "N" shaped bracket (3681), the bracket (3681) is fastened with a bolt (3682) through a nut (3683), and the bolt (3682) is sleeved with the ceramic fiber cloth barrel (368).

6. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 4, characterized in that: The side of the swing plate (367) in contact with the L-shaped rod (366) is provided with an arc-shaped pressing block (3671).

7. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 3, characterized in that: The column box (35) is coaxially arranged with the three-jaw chuck (23).

8. The laser cladding modification processing auxiliary equipment for the inner hole of a cylinder liner according to claim 4, characterized in that: The scraper (364) is provided with a plurality of scrapers and is uniformly distributed along the circumference of the worm wheel (363).

9. A method of laser cladding modification of a cylinder liner bore with the aid of machining, characterized in that: The method comprises the following steps: S1, the cylinder sleeve (4) to be processed is clamped and fixed by the clamping jaw of the three-jaw chuck (23); S2, the moving motor (33) is started, the output shaft of the moving motor (33) drives the driving lead screw (32) to rotate, the moving frame (34) drives the laser cladding head (31) to move towards the cylinder sleeve (4); S3, when the swing plate (367) is in contact with the cylinder sleeve (4), the swing plate (367) is rotated under the action of the cylinder sleeve (4), the L-shaped rod (366) and the guide rod (365) are pressed downward in the process of rotation of the swing plate (367), and the spring (3653) on the guide rod (365) is compressed; S4, when the swing plate (367) and the ceramic fiber cloth barrel (368) enter the inner hole of the cylinder sleeve (4), the elastic ceramic fiber cloth barrel (368) at the end of the swing plate (367) is in abutment with the hole wall of the cylinder sleeve (4) under the action of the spring (3653) on the guide rod (365), and the ceramic fiber cloth barrel (368) is staggered with the nozzle of the laser cladding head (31), and the driving of the laser cladding head (31) is continued to move to the innermost end of the cylinder sleeve (4). S5, start the driving motor (22), the output shaft of the driving motor (22) drives the driving shaft (25) to rotate through the belt pulley one (221), the driving belt (27) and the belt pulley two (26), the driving shaft (25) drives the cylinder sleeve (4) on the three-jaw chuck (23) to rotate, and the laser cladding head (31) started at the same time accurately sprays alloy powder to the inner wall surface of the rotating cylinder sleeve (4), and the alloy powder is fused with the inner wall base body of the cylinder sleeve (4) through laser energy, forming a modified cladding layer; S6, while the cylinder sleeve (4) is rotating, the ceramic fiber cloth tube (368) can scrape and clean the impurities, oxide scale and the like on the hole wall circumferential surface of the next part of the cylinder sleeve (4) which is not cladded by the laser cladding head (31); S7, according to the length requirement of the cylinder sleeve (4) inner hole, the moving motor (33) drives the driving lead screw (32) to rotate slowly, drives the moving frame (34) and the laser cladding head (31) to feed uniformly along the axis direction of the cylinder sleeve (4); S8, after completing the laser cladding of the cylinder sleeve (4), the driving motor (22) and the laser cladding head (31) are closed, the swing plate (367) and the ceramic fiber cloth tube (368) are moved to be separated from the cylinder sleeve (4), at this time, under the elastic force of the spring (3653) on the guide rod (365), the L-shaped rod (366) is driven to move upwards, the swing plate (367) is rotated to contact the limiting plate (3673) on the mounting seat (3672), at the same time, the guide rod (365) drives the rack (3652) to move, drives the gear (3631) and the worm (361) to rotate, drives the worm wheel (363) to rotate, so as to make the scraper (364) rotate on the outer wall of the laser cladding head (31) to clean the residual impurities.

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