Refrigeration box plate skin laser processing equipment and method

Abstract

The invention is suitable for the technical field of laser processing, and provides refrigerating box plate skin laser processing equipment and method.The refrigerating box plate skin laser processing equipment comprises a welding table, positioning assemblies used for fixing a skin are arranged at the corners of the welding table, and a guide frame is fixedly connected to the middle of the welding table; the guide frame is horizontally and slidably connected with a moving plate, the moving plate is fixedly connected with a laser cutting gun, an electric telescopic plate and an air guide pipe, an electric telescopic rod is connected between a fixed part of the electric telescopic plate and the guide frame, and a telescopic part of the electric telescopic plate is fixedly connected with a connecting frame. According to the laser cutting device, when the upward rolling force is too large after the skin is cut open, the two limiting mechanisms are started to rotate at the same time, so that one ends of the two limiting mechanisms are close to the cutting part of the laser cutting gun at the same time, and the limiting force on the skin is increased.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser processing, and particularly relates to a cold storage box plate skin laser processing device and method. BACKGROUND

[0002] The box plate of a cold storage container, a cold storage vehicle and the like transport equipment is usually made of metal skin (such as aluminum alloy, stainless steel) as a surface material. In the manufacturing process, the skin needs to be subjected to precise processing such as laser cutting and welding to meet the sealing and strength requirements of the box structure. However, the existing laser processing equipment has the following technical bottlenecks in actual application:

[0003] Since the skin is usually stored in the form of a roll, there is a phenomenon of internal stress release during processing. During laser cutting, the skin on both sides of the cut is extremely easy to roll upward under the action of thermal stress and material resilience. This not only leads to uneven cutting, but also can cause the uncut area to tear prematurely, seriously affecting the cutting accuracy and yield. SUMMARY

[0004] The purpose of the embodiment of the application is to provide a cold storage box plate skin laser processing device, which aims to solve the problem that the skin on both sides of the cut is extremely easy to roll upward under the action of thermal stress and material resilience during laser cutting.

[0005] The application is implemented as follows: a cold storage box plate skin laser processing device, comprising a welding table, a positioning assembly for fixing the skin is arranged at the corners of the welding table, a guide frame is fixedly connected in the middle of the welding table, a moving plate is horizontally slidably connected to the guide frame, a laser cutting gun, an electric telescopic plate and a gas guide pipe are fixedly connected to the moving plate, the gas guide pipe and the electric telescopic plate are respectively arranged on both sides of the laser cutting gun, an electric telescopic rod is connected between the fixed part of the electric telescopic plate and the guide frame, and a connecting frame is fixedly connected to the telescopic part of the electric telescopic plate.

[0006] A push-pull assembly is arranged on the connecting frame, rotatable limiting mechanisms are arranged at both ends of the push-pull assembly, the push-pull assembly can drive the two limiting mechanisms to move relative to each other, the two limiting mechanisms are arranged at a V-shaped included angle, a detection plate is arranged on the connecting frame in a direction opposite to the V-shaped included angle, a pressure sensor and a temperature sensor are arranged at the bottom of the detection plate, cooling liquid is stored in each limiting mechanism, a hydraulic mechanism is arranged in each limiting mechanism, and the hydraulic mechanism can control the discharge speed of the cooling liquid.

[0007] A monitoring assembly for detecting the welding process is further arranged around the connecting frame.

[0008] A further technical solution is that the push-pull assembly includes a bidirectional electric drive rod and a sliding seat. The bidirectional electric drive rod is fixedly connected to one side of the connecting frame, and both ends of the bidirectional electric drive rod are fixedly connected to the sliding seat. Two guide grooves are provided on the connecting frame, and each sliding seat is slidably connected to a guide groove, and each sliding seat is fixedly connected to a limiting mechanism.

[0009] According to a further technical solution, the limiting mechanism includes a motor, a limiting seat, a rolling ball and a limiting bar;

[0010] Both sliding seats are fixedly connected to motors, and the output shafts of the motors are fixedly connected to limit seats. The two limit seats are arranged in a V shape, and a groove is provided at the bottom of each limit seat. A rolling ball is rollingly connected in each groove, and a limit strip is provided between two adjacent rolling balls.

[0011] According to a further technical solution, the hydraulic mechanism includes a groove cavity, a pressure plate, a driving rod and a water inlet pipe;

[0012] A groove cavity is provided in the limit seat, a driving rod is fixedly connected to the top of the limit seat, an output shaft of the driving rod is fixedly connected to a pressure plate, the pressure plate is slidably and sealedly connected to the inner wall of the groove cavity, the groove cavity is connected to a water inlet pipe that unidirectionally conducts into the groove cavity, and the water inlet pipe slides and passes through the pressure plate.

[0013] According to a further technical solution, grooves are provided on opposite sides of the two limit seats, a row of filter plates are obliquely provided in the grooves, and a guide plate for guiding the airflow is provided at one end of the groove away from the detection plate.

[0014] A further technical solution is that the detection component includes an AI visual detector No. 1 and an AI visual detector No. 2, the AI ​​visual detector No. 1 is fixedly connected to the movable plate, and the AI ​​visual detector No. 1 is facing the lower end of the laser cutting gun, the AI ​​visual detector No. 2 is fixedly connected to the telescopic part of the electric telescopic plate, and the AI ​​visual detector No. 2 is facing away from the end of the laser cutting gun.

[0015] According to a further technical solution, the positioning assembly includes a support frame, an electric push rod and a fixing plate, the support frame is fixedly connected to the welding table, the electric push rod is fixedly connected to the support frame, and the fixing plate is fixedly connected to the telescopic end of the electric push rod.

[0016] A method for laser processing of a refrigerator panel skin, applied to the above-mentioned refrigerator panel skin laser processing equipment, comprises the following steps:

[0017] S1: Use various positioning components to fix the four corners of the skin, start the electric telescopic plate to extend, and the electric telescopic plate drives the two limit mechanisms and the detection plate to descend. The two limit mechanisms and the detection plate are in contact with the surface of the iron sheet and maintain a stable pressure;

[0018] S2: Start the laser cutting gun to cut the skin. The electric telescopic rod pushes the movable plate to move, and the movable plate drives the laser cutting gun to move. Behind the laser cutting gun, two limit mechanisms move in a V-shape to limit the cut skin and remove the welding slag on the surface of the skin after cutting. The two limit mechanisms can also cool the skin surface at the same time.

[0019] S3: In the forward direction of the laser cutting gun, the detection plate scrapes away the dirt on the surface of the skin to be cut. When the upward rolling force after the skin is cut exceeds the set threshold, the two limit mechanisms are started to rotate simultaneously, so that one end of the two limit mechanisms is close to the cutting part of the laser cutting gun at the same time. At this time, the push-pull assembly pulls the two limit mechanisms close at the same time, further increasing the limiting ability of the skin.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the forward direction of the laser cutting gun, the detection plate scrapes away the dirt on the surface of the skin to be cut. At the same time, the temperature sensor and pressure sensor arranged at the bottom of the detection plate can sense the temperature of the skin surface during cutting and the upward extrusion force caused by rolling upward. When the upward rolling force is too large after the skin is cut, the two limit mechanisms are started to rotate at the same time, so that one end of the two limit mechanisms is close to the cutting part of the laser cutting gun at the same time, increasing the limiting force on the skin. At this time, the push-pull assembly pulls the two limit mechanisms close at the same time, further increasing the limiting ability of the skin, and at the same time, the closest distance between the two limit mechanisms and the cutting seam after rotation is consistent with that before rotation, thereby avoiding affecting the cleaning range of the welding slag around the cutting seam after rotation;

[0022] The two limit seats are arranged in a V shape. When the laser cutting gun moves forward, the two limit seats can move synchronously. By keeping the openings of the two limit seats away from the cutting weld, the two limit seats are prevented from squeezing and deforming the area around the weld just after the cutting is completed. When the pressure value monitored by the pressure sensor at the bottom of the detection plate is too large, it means that the skin has been torn and curled at the fracture before the laser cutting gun cuts it. Therefore, the two motors drive the two limit seats to rotate at the same time, and one end of the two limit seats approaches the laser cutting gun at the same time, thereby increasing the limiting effect on the cut seam of the skin and preventing the skin from tearing under the action of bending force;

[0023] The rolling balls at the bottom of the two limit seats cool the skin surface by applying coolant to it. The rolling balls at the bottom of the two limit seats crush the welding slag on the skin surface by rolling it, while all the limit bars scrape and concentrate the welding slag. Under the guidance of the two limit seats, the protective gas ejected from the air duct drives the crushed welding slag to flow between the two limit seats. When the temperature sensor at the bottom of the detection plate senses an increase in the skin surface temperature, the drive rod is activated, and the drive rod pushes the pressure plate downward. At this time, the hydraulic pressure in the groove cavity increases, which accelerates the coolant in the groove cavity to flow through the rolling balls to the skin surface, increasing the cooling rate of the skin surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection between the laser cutting gun and the movable plate in the present invention;

[0026] Figure 3 This is a schematic diagram of the connection between the push-pull assembly and the limiting mechanism in the present invention;

[0027] Figure 4 It is a structural diagram of the limiting mechanism;

[0028] Figure 5 Schematic diagram of the bottom structure of the limit seat;

[0029] Figure 6 It is a structural diagram of the hydraulic mechanism.

[0030] In the attached drawings: 1. Welding table; 2. Positioning assembly; 3. Push-pull assembly; 31. Bidirectional electric drive rod; 32. Sliding seat; 4. Limiting mechanism; 41. Motor; 42. Limiting seat; 43. Rolling ball; 44. Limiting bar; 5. Hydraulic mechanism; 51. Groove; 52. Pressure plate; 53. Drive rod; 54. Water inlet pipe; 6. Groove; 7. Filter plate; 8. Guide plate; 9. Air guide pipe; 10. Guide frame; 11. Moving plate; 12. Laser cutting gun; 13. Electric telescopic plate; 14. Connecting frame; 15. Detection plate; 16. AI visual detector No. 1; 17. AI visual detector No. 2; 18. Electric telescopic rod; 19. Guide groove. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0033] like Figures 1-6 As shown, a cold storage panel skin laser processing device provided by one embodiment of the present invention includes a welding table 1, wherein positioning components 2 for fixing the skin are provided at the corners of the welding table 1, a guide frame 10 is fixedly connected to the middle of the welding table 1, and the guide frame 10 is horizontally slidably connected to a movable plate 11, and the movable plate 11 is fixedly connected to a laser cutting gun 12, an electric telescopic plate 13 and an air guide tube 9, wherein the air guide tube 9 and the electric telescopic plate 13 are respectively provided on both sides of the laser cutting gun 12, an electric telescopic rod 18 is connected between the fixed portion of the electric telescopic plate 13 and the guide frame 10, and the telescopic portion of the electric telescopic plate 13 is fixedly connected to a connecting frame 14;

[0034] The connecting frame 14 is provided with a push-pull assembly 3, and both ends of the push-pull assembly 3 are provided with a rotatable limit mechanism 4. The push-pull assembly 3 can drive the two limit mechanisms 4 to move relative to each other, and a V-shaped angle is formed between the two limit mechanisms 4. A detection plate 15 is provided on the connecting frame 14 in the direction opposite to the V-shaped angle. A pressure sensor and a temperature sensor are provided at the bottom of the detection plate 15. Coolant is stored in each limit mechanism 4, and a hydraulic mechanism 5 is provided in each limit mechanism 4. The hydraulic mechanism 5 can control the discharge speed of the coolant;

[0035] A monitoring component for detecting the welding process is also provided around the connecting frame 14 .

[0036] A method for laser processing of a refrigerator panel skin, applied to the above-mentioned refrigerator panel skin laser processing equipment, comprises the following steps:

[0037] S1: Place the skin on the welding table 1, use the positioning components 2 to fix the four corners of the skin, start the electric telescopic plate 13 to extend, and the electric telescopic plate 13 drives the two limit mechanisms 4 and the detection plate 15 to descend. The two limit mechanisms 4 and the detection plate 15 are in contact with the surface of the iron sheet and maintain a stable pressure.

[0038] S2: Start the laser cutting gun 12 to perform laser cutting on the skin. The electric telescopic rod 18 pushes the movable plate 11 to move. The movable plate 11 drives the laser cutting gun 12 to move. Behind the laser cutting gun 12, two limiting mechanisms 4 move in a V-shaped state to limit the cut skin and remove the welding slag on the surface of the cut skin. The two limiting mechanisms 4 can also cool the skin surface.

[0039] S3: In the forward direction of the laser cutting gun 12, the skin is continuously cut and separated. Since the skin is generally wound and stored, it is easy to roll up after being cut. As a result, during the skin cutting process of the laser cutting gun 12, the uncut parts are actively torn by the skin's own tearing force, affecting the smoothness of the skin cut;

[0040] In this embodiment, in the forward direction of the laser cutting gun 12, the detection plate 15 scrapes the dirt on the surface of the skin to be cut. At the same time, the temperature sensor and pressure sensor arranged at the bottom of the detection plate 15 can sense the temperature of the skin surface during cutting and the upward extrusion force caused by rolling upward. When the upward rolling force is too large after the skin is cut, the two limiting mechanisms 4 are started to rotate at the same time, so that one end of the two limiting mechanisms 4 is close to the cutting part of the laser cutting gun 12 at the same time, increasing the limiting force on the skin. At this time, the push-pull component 3 pulls the two limiting mechanisms 4 close at the same time, further increasing the limiting ability of the skin, and at the same time, the closest distance between the two limiting mechanisms 4 and the cutting seam after rotation can be kept consistent with that before rotation, thereby avoiding affecting the cleaning range of the welding slag around the cutting seam after rotation.

[0041] like Figure 3 As shown, as a preferred embodiment of the present invention, the push-pull assembly 3 includes a bidirectional electric drive rod 31 and a sliding seat 32. The bidirectional electric drive rod 31 is fixedly connected to one side of the connecting frame 14, and both ends of the bidirectional electric drive rod 31 are fixedly connected to the sliding seat 32. Two guide grooves 19 are provided on the connecting frame 14, and each sliding seat 32 is slidably connected to a guide groove 19, and each sliding seat 32 is fixedly connected to a limiting mechanism 4.

[0042] In this embodiment, the bidirectional electric driving rod 31 is started, and the bidirectional electric driving rod 31 can pull the two sliding seats 32 at the same time, and the two sliding seats 32 can drive the two limiting mechanisms 4 to move at the same time.

[0043] like Figure 4 and Figure 5 As shown in FIG. 4 , as a preferred embodiment of the present invention, the limiting mechanism 4 includes a motor 41 , a limiting seat 42 , a rolling ball 43 and a limiting bar 44 ;

[0044] The two sliding seats 32 are fixedly connected to the motor 41, and the output shafts of the motors 41 are fixedly connected to the limit seats 42. The two limit seats 42 are arranged in a V shape, and a groove 6 is provided at the bottom of each limit seat 42. A rolling ball 43 is rollingly connected in each groove 6, and a limit bar 44 is provided between two adjacent rolling balls 43.

[0045] In this embodiment, the two limit seats 42 are arranged in a V shape. When the laser cutting gun 12 moves forward, the two limit seats 42 can move synchronously. By making the openings of the two limit seats 42 away from the cutting weld, the two limit seats 42 are prevented from squeezing the weld area and deforming it after the cutting is completed. When the pressure value monitored by the pressure sensor at the bottom of the detection plate 15 is too large, it means that the skin has been torn and rolled up at the fracture before the laser cutting gun 12 cuts it. Therefore, the two motors 41 drive the two limit seats 42 to rotate at the same time, and one end of the two limit seats 42 approaches the laser cutting gun 12 at the same time, thereby increasing the limiting effect on the cutting seam of the skin and preventing the skin from tearing under the action of bending force. At the same time, the rolling balls 43 at the bottom of the two limit seats 42 can cool the skin surface by applying coolant to the skin surface.

[0046] The rolling balls 43 at the bottom of the two limit seats 42 can crush the welding slag on the surface of the skin by rolling. At the same time, all the limit bars 44 can scrape off and concentrate the welding slag. Under the guidance of the two limit seats 42, the protective gas ejected from the air guide pipe 9 drives the crushed welding slag to flow between the two limit seats 42.

[0047] like Figure 6 As shown in FIG. 5 , as a preferred embodiment of the present invention, the hydraulic mechanism 5 includes a groove cavity 51 , a pressure plate 52 , a driving rod 53 and a water inlet pipe 54 ;

[0048] A groove cavity 51 is provided in the limit seat 42, and a driving rod 53 is fixedly connected to the top of the limit seat 42. The output shaft of the driving rod 53 is fixedly connected to a pressure plate 52. The pressure plate 52 slides and is sealed with the inner wall of the groove cavity 51. The groove cavity 51 is connected to a water inlet pipe 54 that unidirectionally conducts into the groove cavity 51. The water inlet pipe 54 slides and passes through the pressure plate 52.

[0049] In this embodiment, when the temperature sensor at the bottom of the detection plate 15 senses an increase in the temperature of the skin surface, the drive rod 53 is started, and the drive rod 53 pushes the pressure plate 52 to slide downward. At this time, the hydraulic pressure in the groove cavity 51 increases, thereby accelerating the coolant in the groove cavity 51 to flow to the skin surface through the rolling ball 43, thereby increasing the cooling rate of the skin surface.

[0050] like Figure 4 As shown, as a preferred embodiment of the present invention, grooves 6 are provided on the opposite sides of the two limit seats 42, a row of filter plates 7 are obliquely arranged in the grooves 6, and a guide plate 8 for guiding the airflow is provided at one end of the grooves 6 away from the detection plate 15.

[0051] In the embodiment, the two limiting seats 42 are arranged in a V shape, so that the protective gas sprayed in the air guide pipe 9 can be guided, and all the filter plates 7 on the limiting seat 42 can filter the particulate matter generated during welding, and the filtered gas flow can cool the position of the cutting seam under the guidance of the guide plate 8.

[0052] As shown in Figure 2 As a preferred embodiment of the present application, the detection assembly includes an AI vision detector 16 and an AI vision detector 17, the AI vision detector 16 is fixedly connected with the moving plate 11, and the AI vision detector 16 is opposite to the lower end of the laser cutting gun 12, the AI vision detector 17 is fixedly connected with the telescopic part of the electric telescopic plate 13, and the AI vision detector 17 is away from the end of the laser cutting gun 12.

[0053] In the embodiment, the cooperation of the AI vision detector 16 and the AI vision detector 17 can monitor the cutting process of the laser cutting gun 12, and can always monitor the relative position and the relative angle of the two limiting mechanisms 4, so as to facilitate the adjustment of the two limiting mechanisms 4.

[0054] As shown in Figure 1 As a preferred embodiment of the present application, the positioning assembly 2 includes a support frame, an electric push rod and a fixed plate, the support frame is fixedly connected with the welding table 1, the electric push rod is fixedly connected with the support frame, and the fixed plate is fixedly connected with the telescopic end of the electric push rod.

[0055] In the embodiment, the electric push rod is started to drive the fixed plate to move downward, and the skin is fixed by the fixed plate.

[0056] The above only describes the preferred embodiments of the present application, and is not used to limit 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 present application.

Claims

1. A cold storage box panel skin laser processing device, comprising a welding table (1), wherein the corners of the welding table (1) are provided with positioning components (2) for fixing the skin, characterized in that: The middle part of the welding table (1) is fixedly connected to a guide frame (10), the guide frame (10) is horizontally slidably connected to a movable plate (11), the movable plate (11) is fixedly connected to a laser cutting gun (12), an electric telescopic plate (13) and an air guide tube (9), the air guide tube (9) and the electric telescopic plate (13) are respectively arranged on both sides of the laser cutting gun (12), an electric telescopic rod (18) is connected between the fixed part of the electric telescopic plate (13) and the guide frame (10), and the telescopic part of the electric telescopic plate (13) is fixedly connected to a connecting frame (14); The connecting frame (14) is provided with a push-pull assembly (3), and both ends of the push-pull assembly (3) are provided with rotatable limit mechanisms (4). The push-pull assembly (3) can drive the two limit mechanisms (4) to move relative to each other, and a V-shaped angle is formed between the two limit mechanisms (4). A detection plate (15) is provided on the connecting frame (14) in the direction opposite to the V-shaped angle, and a pressure sensor and a temperature sensor are provided at the bottom of the detection plate (15). Cooling liquid is stored in each limit mechanism (4), and a hydraulic mechanism (5) is provided in each limit mechanism (4). The hydraulic mechanism (5) can control the discharge speed of the cooling liquid. A monitoring component for detecting the welding process is also provided around the connecting frame (14).

2. The cold storage container panel skin laser processing equipment according to claim 1, characterized in that: The push-pull assembly (3) comprises a bidirectional electric drive rod (31) and a sliding seat (32); one side of the connecting frame (14) is fixedly connected to the bidirectional electric drive rod (31); both ends of the bidirectional electric drive rod (31) are fixedly connected to the sliding seats (32); two guide grooves (19) are provided on the connecting frame (14); each sliding seat (32) is slidably connected to one of the guide grooves (19); and each sliding seat (32) is fixedly connected to a limiting mechanism (4).

3. The cold storage container panel skin laser processing equipment according to claim 1, characterized in that: The limiting mechanism (4) comprises a motor (41), a limiting seat (42), a rolling ball (43) and a limiting bar (44); The two sliding seats (32) are fixedly connected to a motor (41), and the output shaft of the motor (41) is fixedly connected to a limit seat (42). The two limit seats (42) are arranged in a V shape. A groove (6) is provided at the bottom of each limit seat (42). A rolling ball (43) is rollingly connected in each groove (6), and a limit strip (44) is provided between two adjacent rolling balls (43).

4. The cold storage container panel skin laser processing equipment according to claim 3, characterized in that: The hydraulic mechanism (5) comprises a groove cavity (51), a pressure plate (52), a driving rod (53) and a water inlet pipe (54); A groove cavity (51) is provided in the limiting seat (42), a driving rod (53) is fixedly connected to the top of the limiting seat (42), an output shaft of the driving rod (53) is fixedly connected to a pressure plate (52), the pressure plate (52) is slidably and sealedly connected to the inner wall of the groove cavity (51), the groove cavity (51) is connected to a water inlet pipe (54) that is unidirectionally conducted into the groove cavity (51), and the water inlet pipe (54) slides and passes through the pressure plate (52).

5. The cold storage container panel skin laser processing equipment according to claim 3, characterized in that: The two limiting seats (42) are both provided with grooves (6) on opposite sides, a row of filter plates (7) are obliquely arranged in the grooves (6), and a guide plate (8) for guiding airflow is provided at one end of the grooves (6) away from the detection plate (15).

6. The cold storage container panel skin laser processing equipment according to claim 1, characterized in that: The detection component comprises a No. 1 AI visual detector (16) and a No. 2 AI visual detector (17), wherein the No. 1 AI visual detector (16) is fixedly connected to the movable plate (11), and the No. 1 AI visual detector (16) faces the lower end of the laser cutting gun (12), and the No. 2 AI visual detector (17) is fixedly connected to the telescopic portion of the electric telescopic plate (13), and the No. 2 AI visual detector (17) faces away from the end of the laser cutting gun (12).

7. The cold storage container panel skin laser processing equipment according to claim 4, characterized in that: The positioning assembly (2) comprises a support frame, an electric push rod and a fixing plate, the support frame is fixedly connected to the welding table (1), the electric push rod is fixedly connected to the support frame, and the fixing plate is fixedly connected to the telescopic end of the electric push rod.

8. A method for laser processing of a refrigerator panel skin, applied to the refrigerator panel skin laser processing equipment according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Use each positioning assembly (2) to fix the four corners of the skin, start the electric telescopic plate (13) to extend, and the electric telescopic plate (13) drives the two limit mechanisms (4) and the detection plate (15) to descend in height, and the two limit mechanisms (4) and the detection plate (15) contact the surface of the iron sheet and maintain a stable pressure; S2: Start the laser cutting gun (12) to perform laser cutting on the skin, the electric telescopic rod (18) pushes the movable plate (11) to move, and the movable plate (11) drives the laser cutting gun (12) to move. Behind the laser cutting gun (12), two limiting mechanisms (4) move in a V-shaped state and limit the cut skin, and can remove the welding slag on the surface of the skin after cutting. The two limiting mechanisms (4) can also cool the skin surface; S3: In the forward direction of the laser cutting gun (12), the detection plate (15) scrapes away the dirt on the surface of the skin to be cut. When the upward rolling force after the skin is cut exceeds the set threshold, the two limiting mechanisms (4) are started to rotate simultaneously, so that one end of the two limiting mechanisms (4) is close to the cutting part of the laser cutting gun (12) at the same time. At this time, the push-pull component (3) pulls the two limiting mechanisms (4) close together, further increasing the limiting ability of the skin.

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