Device for trimming laser cladding layer on surface of columnar workpiece

Abstract

The invention discloses a device for trimming a laser cladding layer on the surface of a columnar workpiece, and belongs to the field of rotary grinding. The device comprises a base, two three-jaw chucks are coaxially and symmetrically arranged on the base, a columnar workpiece to be trimmed is clamped between the two three-jaw chucks, a support is connected to the base in a sliding mode, a hydraulic rod is fixedly connected to the upper portion of the support, a polishing roller is installed at the output end of the hydraulic rod, and when the three-jaw chucks drive the columnar workpiece to rotate in the first direction, the polishing roller rotates in the second direction. When the three-jaw chuck drives the cylindrical workpiece to rotate in the first direction, the surface protrusion of the cylindrical workpiece pushes the grinding roller to be away from the cylindrical workpiece, and when the three-jaw chuck drives the cylindrical workpiece to rotate in the second direction, the grinding roller gradually gets close to the cylindrical workpiece along with the number of rotation turns of the cylindrical workpiece; according to the device, the three-jaw chuck is controlled to rotate in the first direction to complete the tool setting action and rotate in the second direction to complete the grinding action, the effect of rapidly grinding the columnar workpiece is achieved, the cost is reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rotary grinding, in particular to a laser cladding layer trimming device for the surface of a columnar workpiece. BACKGROUND

[0002] In coal mining operations, the mine hydraulic support, as the core support equipment of the fully mechanized working face, bears the important responsibility of ensuring the safety of the operation space and resisting the roof pressure. However, it works in harsh conditions of high dust, high humidity and strong impact for a long time, and key components such as the column, the piston rod of the jack and the cylinder barrel need to continuously bear high pressure load, frequent friction and wear and corrosion of complex medium.

[0003] In such harsh environments, the surface of these columnar components is prone to various damage problems. Among them, the generation of cracks will reduce the structural strength of the component, and if not handled in time, it may cause serious safety accidents such as fracture; the formation of rust spots will damage the surface sealing, aggravate internal corrosion and affect the normal operation of the hydraulic system; in addition, long-term wear will also cause the surface size precision to decrease, affecting the matching performance and service life of the component.

[0004] To restore the performance of these damaged components, laser cladding technology is widely used due to its good repair effect and high bonding strength. This technology covers and repairs defects such as cracks and rust spots by cladding a layer of high-performance material on the damaged surface. However, after laser cladding, uneven protrusions are often formed on the surface of the workpiece, and if these protrusions are not trimmed, they will directly affect the assembly precision and subsequent use effect of the component.

[0005] The traditional trimming method needs complex tool setting operation and program writing, which is not only tedious and time-consuming, but also for the workpiece such as the mine column which has relatively low precision requirements, excessive dependence on high-precision equipment and complex processes will lead to increased repair costs and reduced efficiency, which is difficult to meet the actual needs of rapid repair in coal mine sites. SUMMARY

[0006] The purpose of the present application is to provide a laser cladding layer trimming device for the surface of a columnar workpiece, which solves the problem of excessive dependence on high-precision equipment and complex processes for workpieces such as mine columns which have relatively low precision requirements, leading to increased costs and reduced efficiency.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a kind of cylindrical workpiece surface laser cladding layer finishing device, including base, two three-jaw chucks are coaxially arranged on the base, the cylindrical workpiece to be finished is clamped in two three-jaw chucks, bracket is slidably connected on the base, the upper portion of the bracket is fixedly connected with hydraulic rod, the output end of the hydraulic rod is equipped with polishing roller, when the three-jaw chuck drives cylindrical workpiece to rotate in first direction, the surface protrusion of cylindrical workpiece pushes the polishing roller away from cylindrical workpiece, and when the three-jaw chuck drives cylindrical workpiece to rotate in second direction, the polishing roller gradually approaches cylindrical workpiece with the number of rotation of cylindrical workpiece.

[0008] Preferably, the hydraulic rod is communicated with pipeline, the end of the pipeline is connected with three-way valve, the three-way valve is connected with discharge pipe and injection pipe, the discharge pipe and the injection pipe are both provided with one-way valve, when the three-jaw chuck rotates in first direction, the three-way valve operates to make the pipeline communicate with the discharge pipe, and when the three-jaw chuck rotates in second direction, the three-way valve operates to make the pipeline communicate with the injection pipe.

[0009] Preferably, the output end of the hydraulic rod is fixedly connected with mounting seat, the polishing roller is rotatably connected to the mounting seat, two guide rods are fixedly connected on the mounting seat, and the guide rods are threadedly connected with limit nuts.

[0010] Preferably, the pipeline is communicated with pressure relief pipe, the pressure relief pipe is provided with pressure relief valve, when the hydraulic rod is elongated to make the limit nut abut against the bracket, the hydraulic oil input to the hydraulic rod is discharged through the pressure relief pipe.

[0011] Preferably, the three-jaw chuck is coaxially fixedly connected with mounting cylinder, the mounting cylinder is fixedly connected with coaxially arranged gear ring, and the gear ring is engaged with linearly slidingly arranged rack;

[0012] The three-way valve is provided with valve rod, the rack is provided with groove matched with the valve rod, when the gear ring rotates in first direction, the rack pushes the valve rod to rotate through inner wall of the groove to make the pipeline communicate with the discharge pipe, and when the gear ring rotates in second direction, the rack pushes the valve rod to rotate through inner wall of the groove to make the pipeline communicate with the injection pipe.

[0013] Preferably, two ends of the rack are symmetrically fixedly connected with two slide rods, two vertical plates are fixedly connected on the base in a symmetrical manner, two holes matched with two slide rods are respectively formed in two vertical plates, first springs are sleeved on two slide rods, and two ends of the first spring are fixedly connected with the slide rod and the vertical plate respectively.

[0014] Preferably, the end of the injection pipe is communicated with a piston cylinder, a piston rod is slidably connected in the piston cylinder by a second spring, a protrusion is arranged at the bottom end of the piston rod, a push rod is fixedly connected to the end face of the mounting cylinder, and the push rod pushes the protrusion to make the piston rod reciprocate once per rotation of the mounting cylinder.

[0015] Preferably, two connecting seats are fixedly connected to the base in symmetry, and two mounting cylinders are rotatably connected to the two connecting seats respectively.

[0016] Preferably, a sliding seat is fixedly connected to the bottom of the support, two groups of threaded rods are fixedly connected to the sliding seat in symmetry, long holes matched with the two groups of threaded rods are arranged on the base, and lock nuts are threadedly connected to the threaded rods.

[0017] Preferably, a motor is fixedly connected to the mounting seat, and the polishing roller is connected to the output end of the motor.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The present application first controls the three-jaw chuck to drive the cylindrical workpiece to rotate in a first direction, at this time, the protrusions after cladding on the surface of the cylindrical workpiece can contact the polishing roller, thereby pushing the polishing roller to move upward. When the cylindrical workpiece rotates in the first direction, the upward movement of the polishing roller can make the hydraulic oil in the hydraulic rod unidirectionally discharge, thereby making the polishing roller move to the highest position that can just contact the cladding part of the cylindrical workpiece. At this time, the initial position correction of the polishing roller is completed. After the position correction of the polishing roller, the cylindrical workpiece is controlled to rotate in a second direction, at this time, the hydraulic rod gradually moves downward with the number of rotation of the cylindrical workpiece, that is, the hydraulic rod elongates once per rotation of the cylindrical workpiece, thereby completing the feeding action of the polishing roller, making the cladding part of the protrusion of the cylindrical workpiece be gradually ground to be flush with other flat parts of the cylindrical workpiece, and finally completing the cladding finishing of the cylindrical workpiece. The present application reduces the tool setting and programming operation of the cylindrical workpiece during finishing, speeds up the finishing, and only needs to be finished once for the finishing of the workpiece such as the underground support with low precision requirement, without subsequent finishing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the structure at the three-way valve of the present application;

[0022] Figure 3 It is a schematic diagram of the structure at the support of the present application;

[0023] Figure 4 It is a schematic diagram of the structure at the three-jaw chuck of the present application;

[0024] Figure 5 Structure diagram of the tooth ring of the present application;

[0025] Figure 6 Structure diagram of the recess of the present application.

[0026] In the figure: 100, base; 110, connecting seat; 120, three-jaw chuck; 121, mounting cylinder; 200, bracket; 210, hydraulic rod; 220, mounting seat; 230, guide rod; 231, limit nut; 240, motor; 250, polishing roller; 260, sliding seat; 270, threaded rod; 280, locking nut; 300, three-way valve; 310, pipeline; 311, pressure relief pipe; 312, pressure relief valve; 320, discharge pipe; 330, injection pipe; 340, piston cylinder; 350, piston rod; 351, protrusion; 352, lever; 360, second spring; 400, tooth ring; 410, rack; 420, sliding rod; 430, first spring; 440, recess; 450, valve rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] Reference Figures 1-6 The embodiment provides a technical solution: a columnar workpiece surface laser cladding layer finishing device, which comprises a base 100, two three-jaw chucks 120 are coaxially and symmetrically arranged on the base 100, a columnar workpiece to be finished is clamped between the two three-jaw chucks 120, a bracket 200 is slidingly connected to the base 100, the upper part of the bracket 200 is fixedly connected with a hydraulic rod 210, the output end of the hydraulic rod 210 is provided with a polishing roller 250, when the three-jaw chuck 120 drives the columnar workpiece to rotate in a first direction, the surface protrusion of the columnar workpiece pushes the polishing roller 250 away from the columnar workpiece, and when the three-jaw chuck 120 drives the columnar workpiece to rotate in a second direction, the polishing roller 250 gradually approaches the columnar workpiece with the number of rotation of the columnar workpiece.

[0029] After the surface of the columnar workpiece is repaired by cladding, the workpiece is clamped on the two three-jaw chucks 120, and the polishing roller 250 is in contact with the surface of the columnar workpiece in the initial state. First, the three-jaw chuck 120 drives the columnar workpiece to rotate in the first direction. At this time, the protrusions on the surface of the columnar workpiece after cladding can contact the polishing roller 250, thereby pushing the polishing roller 250 to move upward. When the columnar workpiece rotates in the first direction, the upward movement of the polishing roller 250 can cause the hydraulic oil in the hydraulic rod 210 to be discharged in one direction, thereby causing the polishing roller 250 to move to the highest position that can just contact the cladding part of the columnar workpiece. At this time, the initial position correction of the polishing roller 250 is completed.

[0030] After the position correction of the polishing roller 250, the columnar workpiece is controlled to rotate in the second direction. At this time, the hydraulic rod 210 gradually moves downward with the number of rotations of the columnar workpiece, that is, the hydraulic rod 210 is elongated once when the columnar workpiece rotates one revolution, thereby completing the feeding action of the polishing roller 250. The cladding part of the protrusions of the columnar workpiece is gradually ground to be flush with other flat parts of the columnar workpiece, and finally the cladding finishing of the columnar workpiece is completed.

[0031] Through the above arrangement, the tool setting and programming operation of the columnar workpiece during finishing are reduced, the finishing speed is accelerated, and for the finishing of the workpiece such as the underground support which has low precision requirement, only one finishing by the device is required, and subsequent finishing is not required.

[0032] The hydraulic rod 210 is connected with a pipeline 310, the end of the pipeline 310 is connected with a three-way valve 300, the three-way valve 300 is connected with a discharge pipe 320 and an injection pipe 330, and the discharge pipe 320 and the injection pipe 330 are both provided with a one-way valve. When the three-jaw chuck 120 rotates in the first direction, the three-way valve 300 operates to connect the pipeline 310 with the discharge pipe 320, and when the three-jaw chuck 120 rotates in the second direction, the three-way valve 300 operates to connect the pipeline 310 with the injection pipe 330.

[0033] The three-way valve 300 is used to control the connection of the pipeline 310 with the discharge pipe 320 or the injection pipe 330. When the columnar workpiece rotates in the first direction, the device is in the tool setting state. At this time, the pipeline 310 is connected with the discharge pipe 320, so that when the protrusions on the columnar workpiece after cladding push the hydraulic rod 210 to shorten, the hydraulic oil can be discharged through the pipeline 310 and the discharge pipe 320, and the one-way valve on the discharge pipe 320 can prevent the hydraulic oil from flowing back to the hydraulic rod 210, thereby ensuring that the length of the hydraulic rod 210 is maintained.

[0034] When the columnar workpiece rotates towards the second direction, the device is in the dressing state, at this time the three-way valve 300 controls the pipeline 310 to communicate with the injection pipe 330, so that the columnar workpiece drives the hydraulic oil to inject the hydraulic oil through the injection pipe 330 and the pipeline 310 to the hydraulic rod 210 when rotating one circle, so that the hydraulic rod 210 gradually elongates to complete the feed grinding operation.

[0035] The output end of the hydraulic rod 210 is fixedly connected with a mounting seat 220, and the polishing roller 250 is rotationally connected to the mounting seat 220. The mounting seat 220 is fixedly connected with two guide rods 230, and the guide rod 230 is threadedly connected with a limiting nut 231.

[0036] The polishing roller 250 is rotationally connected to the mounting seat 220, and the two guide rods 230 on the mounting seat 220 limit the mounting seat 220, so as to ensure that the polishing roller 250 is parallel to the axis of the columnar workpiece and consistent in direction. By controlling the position of the limiting nut 231 rotating on the guide rod 230, the elongation length of the hydraulic rod 210 is limited, so as to ensure that the hydraulic rod 210 will not be excessively elongated to cause the columnar workpiece to be excessively ground.

[0037] The pipeline 310 is communicated with a pressure relief pipe 311, and the pressure relief pipe 311 is provided with a pressure relief valve 312. When the hydraulic rod 210 is elongated so that the limiting nut 231 abuts against the bracket 200, the hydraulic oil input to the hydraulic rod 210 is discharged through the pressure relief pipe 311.

[0038] In order to avoid that the pressure in the pipeline 310 is too large when the elongation of the hydraulic rod 210 is blocked, a pressure relief pipe 311 is arranged on the pipeline 310, and a pressure relief valve 312 is arranged on the pressure relief pipe 311. When the elongation of the hydraulic rod 210 is blocked, the pressure caused by the increase of the hydraulic oil increases to the threshold value of the pressure relief valve 312, and then the excess hydraulic oil is discharged through the pressure relief pipe 311 to complete pressure relief. When the hydraulic oil is discharged through the pressure relief pipe 311, it indicates that the grinding of the columnar workpiece has been completed, at this time the device is stopped to take out the columnar workpiece.

[0039] In addition, after the three-way valve 300 is controlled to operate so that the pipeline 310 communicates with the injection pipe 330, the hydraulic rod 210 can be controlled to elongate by injecting the hydraulic oil through the pressure relief pipe 311 at a pressure higher than the pressure threshold value of the pressure relief valve 312. At this time, the hydraulic rod 210 is controlled to elongate to the position where the polishing roller 250 contacts the non-cladding part of the columnar workpiece, at this time the initial position correction of the polishing roller 250 is completed, so that the columnar workpiece rotates towards the first direction to start the tool setting operation of the polishing roller 250.

[0040] The coaxial mounting cylinder 121 is fixedly connected with the three-jaw chuck 120, and a gear ring 400 coaxially arranged is fixedly connected with the mounting cylinder 121, and a rack 410 arranged in a straight line is engaged with the gear ring 400; the valve rod 450 is arranged on the three-way valve 300, and the recess 440 matched with the valve rod 450 is arranged on the rack 410, when the gear ring 400 rotates in the first direction, the rack 410 pushes the valve rod 450 to rotate through the inner wall of the recess 440, so that the pipeline 310 is communicated with the discharge pipe 320, and when the gear ring 400 rotates in the second direction, the rack 410 pushes the valve rod 450 to rotate through the inner wall of the recess 440, so that the pipeline 310 is communicated with the injection pipe 330.

[0041] The mounting cylinder 121 is driven to rotate by external power, so that the mounting cylinder 121 drives the three-jaw chuck 120 and the gear ring 400 to rotate, at this time the cylindrical workpiece rotates, when the cylindrical workpiece rotates in the first direction, the gear ring 400 pushes the rack 410 to slide, at this time the rack 410 pushes the valve rod 450 of the three-way valve 300 to swing through the inner wall of the recess 440, so that the pipeline 310 is communicated with the discharge pipe 320, and when the cylindrical workpiece rotates in the second direction, the rack 410 slides in the opposite direction of the above direction, at this time the inner wall of the recess 440 pushes the valve rod 450 of the three-way valve 300 to swing in the opposite direction of the above direction, so that the pipeline 310 is communicated with the injection pipe 330.

[0042] The two ends of the rack 410 are fixedly connected with two slide rods 420 in symmetry, the base 100 is fixedly connected with two vertical plates arranged in symmetry, the two vertical plates are respectively provided with holes matched with the two slide rods 420, and the two slide rods 420 are respectively sleeved with first springs 430, and the two ends of the first spring 430 are fixedly connected with the slide rod 420 and the vertical plate respectively.

[0043] After the gear ring 400 drives the rack 410 to slide to switch the state of the three-way valve 300, the rack 410 is disengaged from the engagement state with the gear ring 400, the action of the two first springs 430 enables the gear ring 400 to still contact the teeth at the end of the rack 410 when rotating, so that when the gear ring 400 changes the rotating direction, the action of the first spring 430 enables the gear ring 400 to drive the rack 410 to slide in the opposite direction, ensuring that the three-way valve 300 can continue to operate subsequently.

[0044] The end of the injection pipe 330 is communicated with a piston cylinder 340, the piston rod 350 is slidably connected in the piston cylinder 340 through a second spring 360, the bottom end of the piston rod 350 is provided with a protruding block 351, the end face of the mounting cylinder 121 is fixedly connected with a push rod 352, and the push rod 352 pushes the protruding block 351 to make the piston rod 350 reciprocate once every time the mounting cylinder 121 rotates one circle.

[0045] When the mounting cylinder 121 rotates to the second direction, the push rod 352 arranged on the mounting cylinder 121 can push the protrusion 351, so that the piston rod 350 slides into the piston cylinder 340 against the elastic force of the second spring 360, so that the piston cylinder 340 injects hydraulic oil into the hydraulic rod 210, so that the hydraulic rod 210 is elongated. With the rotation of the mounting cylinder 121, the push rod 352 is out of contact with the protrusion 351, and at this time the second spring 360 elastically returns, so that the piston rod 350 slides away from the piston cylinder 340. The piston cylinder 340 is also connected to an oil pipe for extracting external hydraulic oil, and a one-way valve is arranged on the oil pipe. When the piston rod 350 slides away from the piston cylinder 340, hydraulic oil can be extracted through the oil pipe, and the internal hydraulic oil of the piston cylinder 340 is replenished. Since the push rod 352 pushes the protrusion 351 once every rotation of the mounting cylinder 121, the hydraulic rod 210 is elongated only after the grinding roller 250 grinds the cylindrical workpiece for one revolution, so that the grinding roller 250 grinds the cylindrical workpiece again.

[0046] The base 100 is fixedly connected with two connecting seats 110 symmetrically, and two mounting cylinders 121 are rotatably connected to the two connecting seats 110 respectively.

[0047] The two connecting seats 110 provide mounting support for the mounting cylinder 121 and the three-jaw chuck 120.

[0048] The bracket 200 is fixedly connected with a sliding seat 260 at the bottom, and two groups of threaded rods 270 are fixedly connected to the sliding seat 260 symmetrically. Long holes are formed in the base 100 to cooperate with the two groups of threaded rods 270, and lock nuts 280 are threadedly connected to the threaded rods 270.

[0049] Since the cladding position of the cylindrical workpiece is uncertain, the bracket 200 is arranged in a movable form. After the lock nuts 280 on the threaded rods 270 are removed, the sliding seat 260 drives the bracket 200 to move, so that the grinding roller 250 is located at the cladding position for grinding. After the position of the bracket 200 is determined, the lock nuts 280 are tightened to fix the positions of the sliding seat 260 and the bracket 200.

[0050] The mounting seat 220 is fixedly connected with a motor 240, and the grinding roller 250 is connected to the output end of the motor 240.

[0051] The motor 240 and the grinding roller 250 can adopt a belt transmission with pulleys to ensure that the motor 240 does not collide with the cylindrical workpiece when the hydraulic rod 210 is elongated. Alternatively, the grinding roller 250 can have a diameter greater than that of the motor 240, and the grinding roller 250 can be coaxially connected to the output end of the motor 240.

[0052] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A device for finishing a laser cladding layer on a surface of a cylindrical workpiece, comprising a base (100), characterized in that: Two three-jaw chucks (120) are coaxially and symmetrically arranged on the base (100), a columnar workpiece to be finished is clamped between the two three-jaw chucks (120), a support (200) is slidably connected to the base (100), a hydraulic rod (210) is fixedly connected to the upper portion of the support (200), a polishing roller (250) is mounted at the output end of the hydraulic rod (210), when the three-jaw chuck (120) drives the columnar workpiece to rotate in a first direction, the surface protrusion of the columnar workpiece pushes the polishing roller (250) away from the columnar workpiece, and when the three-jaw chuck (120) drives the columnar workpiece to rotate in a second direction, the polishing roller (250) gradually approaches the columnar workpiece with the number of rotation of the columnar workpiece.

2. The apparatus for modifying a laser cladding layer on a surface of a columnar workpiece according to claim 1, wherein: A pipeline (310) is communicated with the hydraulic rod (210), a three-way valve (300) is connected to the end of the pipeline (310), a discharge pipe (320) and an injection pipe (330) are connected to the three-way valve (300), a one-way valve is arranged on the discharge pipe (320) and the injection pipe (330), when the three-jaw chuck (120) rotates in a first direction, the three-way valve (300) operates to make the pipeline (310) communicated with the discharge pipe (320), and when the three-jaw chuck (120) rotates in a second direction, the three-way valve (300) operates to make the pipeline (310) communicated with the injection pipe (330).

3. The apparatus of claim 2 wherein: The output end of the hydraulic rod (210) is fixedly connected with a mounting seat (220), the polishing roller (250) is rotatably connected to the mounting seat (220), two guide rods (230) are fixedly connected to the mounting seat (220), and a limiting nut (231) is threadedly connected to the guide rod (230).

4. The apparatus for finishing a laser cladding layer on a surface of a columnar workpiece according to claim 3, wherein: A pressure relief pipe (311) is communicated with the pipeline (310), a pressure relief valve (312) is arranged on the pressure relief pipe (311), and when the hydraulic rod (210) is elongated to make the limiting nut (231) abut against the support (200), the hydraulic oil input to the hydraulic rod (210) is discharged through the pressure relief pipe (311).

5. The apparatus for finishing a laser cladding layer on a surface of a columnar workpiece according to claim 2, wherein: A mounting cylinder (121) is coaxially and fixedly connected to the three-jaw chuck (120), a coaxially arranged gear ring (400) is fixedly connected to the mounting cylinder (121), and a rack (410) arranged in a straight line is engaged with the gear ring (400). A valve rod (450) is arranged on the three-way valve (300), a groove (440) matched with the valve rod (450) is arranged on the rack (410), when the gear ring (400) rotates in a first direction, the rack (410) pushes the valve rod (450) to rotate through the inner wall of the groove (440) to make the pipeline (310) communicated with the discharge pipe (320), and when the gear ring (400) rotates in a second direction, the rack (410) pushes the valve rod (450) to rotate through the inner wall of the groove (440) to make the pipeline (310) communicated with the injection pipe (330).

6. The apparatus of claim 5 wherein: Two slide rods (420) are symmetrically and fixedly connected at two ends of the rack (410), two vertical plates are fixedly connected on the base (100) and are symmetrically arranged, two holes are respectively formed in the two vertical plates and are matched with the two slide rods (420), a first spring (430) is sleeved on each of the two slide rods (420), and two ends of the first spring (430) are fixedly connected with the slide rod (420) and the vertical plate respectively.

7. The apparatus of claim 5 wherein: the laser beam is a pulsed laser beam; and the laser beam is directed at the workpiece surface at a speed of at least 1 m / s. An end of the injection pipe (330) is communicated with a piston cylinder (340), a piston rod (350) is slidably connected in the piston cylinder (340) through a second spring (360), a protruding block (351) is arranged at a bottom end of the piston rod (350), a push rod (352) is fixedly connected to an end face of the mounting cylinder (121), and the mounting cylinder (121) rotates one circle to push the protruding block (351) to make the piston rod (350) reciprocate one time.

8. The apparatus of claim 5 wherein: Two connecting seats (110) are fixedly connected on the base (100) symmetrically, and two mounting cylinders (121) are respectively rotatably connected to the two connecting seats (110).

9. The device for trimming the laser cladding layer on the surface of a columnar workpiece according to claim 1, characterized in that: A slide base (260) is fixedly connected to a bottom of the support (200), two groups of threaded rods (270) are fixedly connected on the slide base (260) symmetrically, long holes matched with the two groups of threaded rods (270) are formed in the base (100), and lock nuts (280) are threadedly connected on the threaded rods (270).

10. The apparatus of claim 3 wherein: A motor (240) is fixedly connected to the mounting seat (220), and the polishing roller (250) is connected to an output end of the motor (240).

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