A cylindrical workpiece surface laser cladding layer finishing device

Abstract

The application discloses a kind of columnar workpiece surface laser cladding layer finishing device, belong to rotary grinding field;The device includes base, two three-jaw chucks are coaxially symmetrically arranged on the base, the columnar workpiece to be finished is clamped in two three-jaw chucks, is slidably connected with bracket on the base, the upper portion of bracket is fixedly connected with hydraulic rod, and the output end of hydraulic rod is equipped with polishing roller, when three-jaw chuck drives columnar workpiece to rotate in first direction, the surface protrusion of columnar workpiece pushes polishing roller away from columnar workpiece, and, when three-jaw chuck drives columnar workpiece to rotate in second direction, polishing roller gradually approaches columnar workpiece with the number of rotation of columnar workpiece;The device is rotated towards first direction by controlling three-jaw chuck to complete tool action, and is rotated towards second direction to complete grinding action, reaches the effect of columnar workpiece fast grinding, reduces cost, improves efficiency.

Description

Technical Field

[0001] This invention relates to the field of rotary grinding technology, specifically to a device for repairing the laser cladding layer on the surface of a columnar workpiece. Background Technology

[0002] In coal mining operations, hydraulic supports serve as the core support equipment for fully mechanized mining faces, bearing the important responsibility of ensuring the safety of the working space and resisting roof pressure. However, they operate under harsh conditions of high dust, high humidity, and strong impact for extended periods. Key components such as columns, jack piston rods, and cylinders must continuously withstand high-pressure loads, frequent friction and wear, and the corrosive effects of complex media.

[0003] In such a harsh environment, the surfaces of these columnar components are highly susceptible to various types of damage. Cracks can reduce the structural strength of the components, and if not addressed promptly, may lead to serious safety accidents such as breakage. Rust can compromise surface sealing, exacerbate internal corrosion, and affect the normal operation of the hydraulic system. Furthermore, long-term wear can cause a decrease in surface dimensional accuracy, affecting the fit and service life of the components.

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

[0005] Traditional repair methods require complex tool setting operations and programming, which are not only cumbersome and time-consuming, but also, for workpieces with relatively low precision requirements such as underground support pillars, over-reliance on high-precision equipment and complex processes will lead to increased repair costs and reduced efficiency, making it difficult to meet the actual needs of rapid repair in coal mines. Summary of the Invention

[0006] The purpose of this invention is to provide a laser cladding layer trimming device for the surface of columnar workpieces, which solves the problem of increased costs and reduced efficiency caused by over-reliance on high-precision equipment and complex processes for workpieces such as mine support pillars, which have relatively low precision requirements.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser cladding layer trimming device for a columnar workpiece surface, comprising a base, two three-jaw chucks coaxially and symmetrically arranged on the base, the columnar workpiece to be trimmed being clamped in the two three-jaw chucks, a bracket slidably connected to the base, a hydraulic rod fixedly connected to the upper part of the bracket, and a grinding roller installed at the output end of the hydraulic rod; when the three-jaw chucks drive the columnar workpiece to rotate in a first direction, the surface protrusions of the columnar workpiece push the grinding roller away from the columnar workpiece; and when the three-jaw chucks drive the columnar workpiece to rotate in a second direction, the grinding roller gradually approaches the columnar workpiece as the number of rotations of the columnar workpiece increases.

[0008] Preferably, the hydraulic rod is connected to a pipe, and a three-way valve is connected to the end of the pipe. The three-way valve is connected to a discharge pipe and an injection pipe. Both the discharge pipe and the injection pipe are equipped with check valves. When the three-jaw chuck rotates in the first direction, the three-way valve operates to connect the pipe to the discharge pipe. And when the three-jaw chuck rotates in the second direction, the three-way valve operates to connect the pipe to the injection pipe.

[0009] Preferably, the output end of the hydraulic rod is fixedly connected to a mounting base, the grinding roller is rotatably connected to the mounting base, and two guide rods are fixedly connected to the mounting base, with limit nuts threaded onto the guide rods.

[0010] Preferably, a pressure relief pipe is connected to the pipeline, and a pressure relief valve is provided on the pressure relief pipe. When the hydraulic rod extends so that the limiting nut abuts against the bracket, the hydraulic oil input to the hydraulic rod is discharged through the pressure relief pipe.

[0011] Preferably, a mounting cylinder is coaxially fixedly connected to the three-jaw chuck, and a toothed ring is coaxially fixedly connected to the mounting cylinder, with a linearly sliding rack meshing on the toothed ring;

[0012] The three-way valve is provided with a valve stem, and the rack is provided with a groove that cooperates with the valve stem. When the gear ring rotates in the first direction, the rack pushes the valve stem to rotate through the inner wall of the groove, so that the pipe is connected to the discharge pipe. When the gear ring rotates in the second direction, the rack pushes the valve stem to rotate through the inner wall of the groove, so that the pipe is connected to the injection pipe.

[0013] Preferably, two slide rods are symmetrically fixedly connected to both ends of the rack, and two symmetrically arranged upright plates are fixedly connected to the base. The two upright plates are respectively provided with holes that cooperate with the two slide rods. A first spring is sleeved on each of the two slide rods, and the two ends of the first spring are respectively fixedly connected to the slide rod and the upright plate.

[0014] Preferably, the end of the injection tube is connected to a piston cylinder, and a piston rod is slidably connected inside the piston cylinder by a second spring. A protrusion is provided at the bottom end of the piston rod, and a lever is fixedly connected to the end face of the mounting cylinder. Each time the mounting cylinder rotates one revolution, the lever pushes the protrusion so that the piston rod slides back and forth once.

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

[0016] Preferably, a slide is fixedly connected to the bottom of the bracket, and two sets of threaded rods are symmetrically fixedly connected to the slide. The base has an elongated hole that mates with the two sets of threaded rods, and a locking nut is threaded onto the threaded rod.

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

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention first controls a three-jaw chuck to rotate a cylindrical workpiece in a first direction. At this point, the protrusions on the surface of the workpiece after cladding can contact the grinding roller, thus pushing the grinding roller upwards. As the workpiece rotates in the first direction, the upward movement of the grinding roller allows the hydraulic oil in the hydraulic rod to be discharged in one direction, enabling the grinding roller to move to the highest point where it just contacts the cladding area of ​​the workpiece. This completes the initial position correction of the grinding roller. After the position correction, the workpiece is controlled to rotate in a second direction. The hydraulic rod gradually moves downwards with each rotation of the workpiece; that is, for every one rotation of the workpiece, the hydraulic rod extends once, completing the feeding action of the grinding roller. This gradually grinds the cladding area of ​​the workpiece until it is flush with the other flat areas of the workpiece, ultimately completing the cladding trimming of the workpiece. This reduces the need for tool setting and programming operations during trimming, speeding up the trimming process. Furthermore, for workpieces such as mine supports with low precision requirements, trimming only requires one trimming operation using this device, eliminating the need for subsequent fine finishing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the three-way valve of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the bracket in this invention;

[0023] Figure 4 This is a schematic diagram of the structure of the three-jaw chuck of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure at the toothed ring of the present invention;

[0025] Figure 6 This is a schematic diagram of the groove in the present invention.

[0026] In the diagram: 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, grinding roller; 260, slide; 270, threaded rod; 280, locking nut; 300, three-way valve; 310, pipe; 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, gear ring; 410, rack; 420, slide rod; 430, first spring; 440, groove; 450, valve stem. Detailed Implementation

[0027] 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.

[0028] Reference Figures 1-6 This embodiment provides a technical solution: a laser cladding layer trimming device for the surface of a columnar workpiece, including a base 100, two three-jaw chucks 120 coaxially and symmetrically arranged on the base 100, the columnar workpiece to be trimmed is clamped in the two three-jaw chucks 120, a bracket 200 is slidably connected on the base 100, a hydraulic rod 210 is fixedly connected to the upper part of the bracket 200, and a grinding roller 250 is installed at the output end of the hydraulic rod 210. When the three-jaw chucks 120 drive the columnar workpiece to rotate in a first direction, the surface protrusions of the columnar workpiece push the grinding roller 250 away from the columnar workpiece. When the three-jaw chucks 120 drive the columnar workpiece to rotate in a second direction, the grinding roller 250 gradually approaches the columnar workpiece as the columnar workpiece rotates.

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

[0030] After the position of the grinding roller 250 is corrected, the columnar workpiece is controlled to rotate in the second direction. At this time, the hydraulic rod 210 gradually moves down with the number of rotations of the columnar workpiece. That is, the hydraulic rod 210 extends once for every one rotation of the columnar workpiece, completing the feeding action of the grinding roller 250. This makes the protruding cladding part of the columnar workpiece gradually ground until it is flush with other flat parts of the columnar workpiece, and finally the cladding repair of the columnar workpiece is completed.

[0031] With the above settings, the tool setting and programming operations during the dressing of columnar workpieces are reduced, the dressing speed is accelerated, and for workpieces such as mine support pillars with low precision requirements, the dressing only needs to be performed once by this device, without the need for subsequent fine dressing.

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

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

[0034] When the cylindrical workpiece rotates in the second direction, the device is in the dressing state. At this time, the three-way valve 300 controls the connection between the pipe 310 and the injection pipe 330. As a result, when the cylindrical workpiece rotates one revolution, it drives the hydraulic oil to inject hydraulic oil into the hydraulic rod 210 through the injection pipe 330 and the pipe 310, so that the hydraulic rod 210 gradually extends to complete the feed grinding operation.

[0035] The output end of the hydraulic rod 210 is fixedly connected to the mounting base 220, the grinding roller 250 is rotatably connected to the mounting base 220, and two guide rods 230 are fixedly connected to the mounting base 220. The guide rods 230 are threadedly connected to the limit nuts 231.

[0036] The grinding roller 250 is rotatably connected to the mounting base 220. The two guide rods 230 on the mounting base 220 limit the mounting base 220 to ensure that the grinding roller 250 is parallel to the axis of the cylindrical workpiece and in the same direction. By controlling the position of the limit nut 231 on the guide rod 230, the extension length of the hydraulic rod 210 is limited, thereby ensuring that the hydraulic rod 210 will not be excessively extended and cause the cylindrical workpiece to be excessively ground.

[0037] A pressure relief pipe 311 is connected to the pipe 310, and a pressure relief valve 312 is installed on the pressure relief pipe 311. When the hydraulic rod 210 extends so that the limit 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] To prevent excessive pressure in pipe 310 when hydraulic rod 210 is obstructed during extension, a pressure relief pipe 311 is installed on pipe 310, and a pressure relief valve 312 is installed on pressure relief pipe 311. When hydraulic rod 210 is obstructed during extension, the pressure caused by the increase in hydraulic oil increases to the threshold of pressure relief valve 312. Excess hydraulic oil is then discharged through pressure relief pipe 311 to complete the pressure relief. When hydraulic oil is discharged through pressure relief pipe 311, it indicates that the grinding of the cylindrical workpiece has been completed. At this time, the operation of the device can be stopped and the cylindrical workpiece can be removed.

[0039] In addition, after controlling the operation of the three-way valve 300 to connect the pipeline 310 and the injection pipe 330, hydraulic oil can be injected through the pressure relief pipe 311 at a pressure higher than the pressure threshold of the pressure relief valve 312 to control the extension of the hydraulic rod 210. At this time, the hydraulic rod 210 is extended until the grinding roller 250 contacts the non-cladding part of the columnar workpiece. At this time, the initial position correction of the grinding roller 250 is completed, and then the tool setting operation of the grinding roller 250 begins after the columnar workpiece rotates in the first direction.

[0040] A mounting cylinder 121 is coaxially fixedly connected to the three-jaw chuck 120. A coaxially arranged toothed ring 400 is fixedly connected to the mounting cylinder 121. A linearly sliding rack 410 is engaged on the toothed ring 400. A valve stem 450 is provided on the three-way valve 300. A groove 440 that mates with the valve stem 450 is provided on the rack 410. When the toothed ring 400 rotates in the first direction, the rack 410 pushes the valve stem 450 to rotate through the inner wall of the groove 440, so that the pipe 310 is connected to the discharge pipe 320. When the toothed ring 400 rotates in the second direction, the rack 410 pushes the valve stem 450 to rotate through the inner wall of the groove 440, so that the pipe 310 is connected to the injection pipe 330.

[0041] The mounting cylinder 121 is driven to rotate by an external power source, thereby driving 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 stem 450 of the three-way valve 300 to swing through the inner wall of the groove 440, so that the pipe 310 is connected to the discharge pipe 320. When the cylindrical workpiece rotates in the second direction, the rack 410 slides in the opposite direction. At this time, the inner wall of the groove 440 pushes the valve stem 450 of the three-way valve 300 to swing in the opposite direction, so that the pipe 310 is connected to the injection pipe 330.

[0042] Two slide rods 420 are symmetrically fixedly connected to both ends of the rack 410. Two upright plates are symmetrically arranged and fixedly connected to the base 100. The two upright plates are respectively provided with holes that cooperate with the two slide rods 420. A first spring 430 is sleeved on each of the two slide rods 420. The two ends of the first spring 430 are fixedly connected to the slide rod 420 and the upright plate, respectively.

[0043] After the three-way valve 300 switches states, the rack 410 disengages from the gear ring 400 as the gear ring 400 drives the rack 410 to slide. The two first springs 430 ensure that the gear ring 400 can still contact the teeth at the very end of the rack 410 when it rotates. Thus, when the gear ring 400 reverses direction, the first springs 430 enable 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.

[0044] The end of the injection tube 330 is connected to the piston cylinder 340. The piston rod 350 is slidably connected inside the piston cylinder 340 through the second spring 360. The bottom end of the piston rod 350 is provided with a protrusion 351. A lever 352 is fixedly connected to the end face of the mounting cylinder 121. Every time the mounting cylinder 121 rotates, the lever 352 pushes the protrusion 351 so that the piston rod 350 slides back and forth once.

[0045] When the mounting cylinder 121 rotates in the second direction, the lever 352 on the mounting cylinder 121 pushes the protrusion 351, causing the piston rod 350 to slide into the piston cylinder 340 against the elastic force of the second spring 360. This allows hydraulic oil to be injected into the hydraulic rod 210 from the piston cylinder 340, causing the hydraulic rod 210 to extend. As the mounting cylinder 121 rotates, the lever 352 disengages from the protrusion 351. At this time, the second spring 360 elastically returns to its original position, causing the piston rod 350 to move away from the piston cylinder 340. Sliding in the direction of 0, the piston cylinder 340 is also connected to an oil pipe for drawing external hydraulic oil. A one-way valve is also installed on this oil pipe. When the piston rod 350 slides away from the piston cylinder 340, it can draw hydraulic oil through the oil pipe to replenish the hydraulic oil inside the piston cylinder 340. Since the lever 352 pushes the protrusion 351 once for every rotation of the mounting cylinder 121, the hydraulic rod 210 will only extend after the grinding roller 250 grinds the columnar workpiece once, so that the grinding roller 250 grinds the columnar workpiece again.

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

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

[0048] The bottom of the bracket 200 is fixedly connected to a slide 260, and two sets of threaded rods 270 are symmetrically fixedly connected to the slide 260. The base 100 has an elongated hole that mates with the two sets of threaded rods 270, and a locking nut 280 is threadedly connected to the threaded rod 270.

[0049] Since the cladding area of ​​the columnar workpiece is uncertain, the bracket 200 is made movable. After removing the locking nut 280 on the threaded rod 270, the slide 260 moves the bracket 200 so that the grinding roller 250 is in the cladding area for grinding. After the position of the bracket 200 is determined, tightening the locking nut 280 will fix the position of the slide 260 and the bracket 200.

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

[0051] The motor 240 and the grinding roller 250 can be connected by a belt drive to ensure that the motor 240 will not collide with the columnar workpiece when the hydraulic rod 210 extends. Alternatively, a grinding roller 250 with a diameter larger than that of the motor 240 can be used, and the grinding roller 250 can be coaxially connected to the output end of the motor 240.

[0052] 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 device for finishing a laser cladding layer on a surface of a cylindrical workpiece, comprising a base (100), characterized in that: The base (100) is coaxially and symmetrically provided with two three-jaw chucks (120), the cylindrical workpiece to be finished is clamped in the two three-jaw chucks (120), a support (200) is slidably connected to the base (100), the upper portion of the support (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 cylindrical workpiece to rotate in a first direction, the surface protrusion of the cylindrical workpiece pushes the polishing roller (250) away from the cylindrical workpiece, and when the three-jaw chuck (120) drives the cylindrical workpiece to rotate in a second direction, the polishing roller (250) gradually approaches the cylindrical workpiece with the number of rotation of the cylindrical workpiece; The hydraulic rod (210) is communicated 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), 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 a first direction, the three-way valve (300) operates to make the pipeline (310) communicate 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) communicate with the injection pipe (330); The three-jaw chuck (120) is coaxially and fixedly connected with a mounting cylinder (121), the mounting cylinder (121) is fixedly connected with a coaxially arranged gear ring (400), the gear ring (400) is engaged with a linearly and slidably arranged gear rack (410); The three-way valve (300) is provided with a valve rod (450), the gear rack (410) is provided with a groove (440) matched with the valve rod (450), when the gear ring (400) rotates in a first direction, the gear rack (410) pushes the valve rod (450) to rotate through the inner wall of the groove (440) to make the pipeline (310) communicate with the discharge pipe (320), and when the gear ring (400) rotates in a second direction, the gear rack (410) pushes the valve rod (450) to rotate through the inner wall of the groove (440) to make the pipeline (310) communicate with the injection pipe (330); The two ends of the gear rack (410) are symmetrically and fixedly connected with two slide rods (420), the base (100) is fixedly connected with two symmetrically arranged vertical plates, two holes matched with the two slide rods (420) are respectively formed in the two vertical plates, the two slide rods (420) are both sleeved with a first spring (430), and the two ends of the first spring (430) are fixedly connected with the slide rod (420) and the vertical plate.

2. The apparatus for finishing a laser cladding layer on a surface of a columnar workpiece according to claim 1, wherein: The output end of the hydraulic rod (210) is fixedly connected with a mounting seat (220), the polishing roller (250) is rotationally 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).

3. The apparatus of claim 2 wherein: A pressure relief pipe (311) is communicated with the pipe (310), a pressure relief valve (312) is arranged on the pressure relief pipe (311), and when the limiting nut (231) abuts against the support (200) when the hydraulic rod (210) is elongated, the hydraulic oil input into the hydraulic rod (210) is discharged through the pressure relief pipe (311).

4. The apparatus for finishing a laser cladding layer on a surface of a columnar workpiece according to claim 3, wherein: 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 per rotation of the mounting cylinder (121).

5. The apparatus of claim 1 wherein: The base (100) is fixedly connected with two connecting seats (110) in symmetry, and the two mounting cylinders (121) are rotationally connected to the two connecting seats (110) respectively.

6. The apparatus of claim 1 wherein: The bottom of the support (200) is fixedly connected with a sliding seat (260), the sliding seat (260) is fixedly connected with two groups of threaded rods (270) in symmetry, the base (100) is provided with long holes matched with the two groups of threaded rods (270), and the threaded rods (270) are threadedly connected with locking nuts (280).

7. The device for trimming the laser cladding layer on the surface of a columnar workpiece according to claim 2, characterized in that: The mounting seat (220) is fixedly connected with a motor (240), and the polishing roller (250) is connected to the output end of the motor (240).

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