Ship plate processing device
By integrating the design of conveyor rollers, gantry frames, and clamping components into an automated cutting device, the problems of poor cutting accuracy and stability of ship plate in existing technologies have been solved, achieving efficient and precise plate cutting.
Patent Information
- Application Number
- CN202511789126.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-02-24
AI Technical Summary
Existing ship plate processing equipment lacks an effective clamping mechanism during the cutting process, resulting in poor cutting accuracy and stability, difficulty in achieving convenient fixed-length adjustment, and low operating efficiency.
It adopts an integrated design including conveyor rollers, gantry frame, laser cutting components, clamping components and drive components. Through the forward and backward movement and rotation of the clamping components, it realizes automated cutting and multi-point clamping of the sheet metal. Combined with limit components and auxiliary rollers, it ensures cutting accuracy and stability.
It improves the precision and stability of sheet metal cutting, realizes automated cutting, improves cutting efficiency and consistency of cutting dimensions, and enhances the equipment's adaptability to sheets of different specifications.
Smart Images

Figure CN121551858A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of shipbuilding and repair technology, specifically to a ship plate processing device. Background Technology
[0002] In shipbuilding and repair, plate cutting is a critical process, and its precision and efficiency directly affect the quality of the ship's structure and production cycle. Existing plate processing equipment typically employs laser cutting technology and uses conveyor rollers for automated plate transport. However, these devices still have some shortcomings in practical applications. First, during the cutting process, the plates often lack an effective clamping mechanism, relying solely on the conveyor rollers for support. This makes the plates susceptible to displacement due to cutting vibrations or external forces, thus affecting cutting precision and stability. Second, for plates requiring different cutting lengths, existing equipment lacks a convenient fixed-length adjustment mechanism. Operators typically need to manually measure and scribing the plates according to preset dimensions to determine the cutting position. This method is not only time-consuming and labor-intensive, resulting in low production efficiency, but also heavily relies on operator experience, easily introducing human error and leading to poor consistency in cutting dimensions. Summary of the Invention
[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a ship plate processing device to solve the technical problems of low plate processing and cutting efficiency and low cutting accuracy in the prior art.
[0004] To solve the above-mentioned technical problems, the present invention provides a ship plate processing apparatus, comprising: The frame, from front to back, includes a loading area, a processing area, and a unloading area, with a through slot in the unloading area; Two conveyor roller conveyors are located on the frame and extend from the loading area to the unloading area. The two conveyor roller conveyors are located on the left and right sides of the through trough. The gantry crane is located in the processing area; Laser cutting assembly, connected to the gantry frame; Mounting bracket, connected to the bottom of the unloading area; The connecting plate is slidably connected to the mounting bracket in the front-to-back direction; The first drive component is connected to the mounting bracket and drives the connecting plate to slide back and forth; The first clamping assembly is rotatably connected to the connecting plate and the rotation axis is set in the left and right direction. By rotating the first clamping assembly, the first clamping assembly is located on the rear side of the plate and can clamp the rear end of the plate or be lower than the conveyor roller. The second drive assembly is connected to the connecting plate and drives the first clamping assembly to rotate.
[0005] With the above structure, the ship plate processing device of the present invention has the following advantages: the plate to be cut is hoisted onto the conveyor roller on the frame, and the conveyor roller transports the plate from front to back. When the plate contacts the first clamping component, the transport stops and the rear end of the plate is clamped by the first clamping component, improving the cutting accuracy and stability of the plate. At this time, the laser cutting component cuts the plate. After the cutting is completed, the first clamping component releases the plate, and the second drive component drives the first clamping component to rotate so that the first clamping component is lower than the conveyor roller. The conveyor roller can continue to transport the cut plate to the rear, and can also continue to transport the uncut plate to the rear, realizing automated cutting of the plate and improving the cutting efficiency. In addition, the front and rear position of the laser cutting component remains constant, while the first drive component can drive the connecting plate and drive the first clamping component to move back and forth, thereby changing the front and rear position of the first clamping component. By changing the front and rear position of the first clamping component, different cutting lengths of the plate can be achieved, improving the consistency of the cutting size and the cutting accuracy.
[0006] As an improvement, the first drive assembly includes a first motor, a first lead screw pair, and a first guide rail pair. The first motor, the first lead screw pair, and the first guide rail pair are all connected to the mounting bracket. A connecting plate connects the first lead screw pair and the first guide rail pair, and the output shaft of the first motor is connected to the first lead screw pair. With this structure, the first lead screw pair can accurately convert the rotational motion of the first motor into the linear motion of the connecting plate, thereby achieving precise and reliable control of the front and rear positions of the first clamping assembly. The first guide rail pair ensures the stability and straightness of the connecting plate during movement, effectively preventing jamming and skew, ensuring the accuracy of fixed-length cutting, and improving the long-term operational stability of the system.
[0007] As an improvement, the second drive assembly includes a second motor, a second lead screw pair, a second guide rail pair, a rack, and two gears. The second motor, the second lead screw pair, and the second guide rail pair are all connected to a connecting plate. The rack is connected to the second lead screw pair and slides along the front-back direction to the second guide rail pair. The two gears are respectively connected to the left and right sides of the first clamping assembly. The rack has two rack sections that mesh with the two gears respectively. With this structure, the rack is driven to move linearly by the second motor, the second lead screw pair, and the second guide rail pair. The two gears then synchronously convert the linear motion into rotational motion on the left and right sides of the first clamping assembly. This transmission method ensures the synchronicity and stability of the first clamping assembly on both sides during rotation, effectively avoiding structural stress or jamming caused by asynchrony. This design is compact, has precise transmission, and ensures that the first clamping assembly can reliably switch between the working position and the avoidance position.
[0008] As an improvement, the feeding area is equipped with two limiting components and two third drive components. The two limiting components are slidably connected to the feeding area in the left-right direction and are located outside the two conveying roller tracks. The two third drive components drive the two limiting components to move towards or away from each other. Each limiting component includes a frame and several limiting rollers. The limiting rollers are rotatably connected to the frame in the vertical direction and are equidistantly distributed in the front-back direction. With this structure, by setting the limiting components that can move left and right, it can adapt to plates of different widths. When the plate is conveyed to the feeding area, the two limiting components can move towards each other to guide and center the plate from the left and right sides, preventing the plate from tilting or deviating during the conveying process. This further improves the positioning accuracy of the first clamping component in the front-back direction of the plate, thereby improving the cutting accuracy and the consistency of the cutting size. The limiting rollers on the limiting components reduce the friction with the sides of the plate, so that the plate can still be smoothly conveyed backward while being limited.
[0009] As an improvement, the third drive assembly includes a third motor, a third lead screw pair, and a third guide rail pair. All three are connected to the feeding area. The limiting assembly is connected to the third lead screw pair and the third guide rail pair, and the output shaft of the third motor is connected to the third lead screw pair. With this structure, the third drive assembly utilizes the third motor, third lead screw pair, and third guide rail pair for precise, electric control of the limiting assembly. Operators can easily set the distance between the two limiting assemblies via a program or interface, thus quickly adapting to different widths of sheet metal. This design offers a high degree of automation, fast adjustment speed, and precise positioning, significantly improving the equipment's adaptability to different sheet metal specifications and increasing production efficiency.
[0010] As an improvement, a second clamping component is connected to the rear end of each limiting component for clamping the left or right side of the sheet metal. With this structure, the second clamping component is set at the rear end of the limiting component, so that it can clamp the sheet metal from the left and right sides after the sheet metal is initially aligned. This, combined with the first clamping component clamping from the rear end, realizes multi-point and multi-directional clamping of the sheet metal, which greatly enhances the overall rigidity and stability of the sheet metal during the laser cutting process, effectively suppresses the adverse effects of cutting vibration, and thus further ensures cutting accuracy and cut quality.
[0011] As an improvement, both the first and second clamping assemblies include a mounting base, a first screw, a fourth motor, and two chucks. The first screw is vertically rotatably connected to the mounting base and has a first threaded section and a second threaded section with opposite directions of rotation. The two chucks are vertically slidably connected to the mounting base and threadedly connected to the first and second threaded sections, respectively. The fourth motor is connected to the mounting base and drives the first screw to rotate. With this structure, when the fourth motor drives the first screw to rotate, the two chucks will move synchronously towards or away from each other. This structure ensures that the clamping force is evenly applied to both sides of the sheet metal, avoiding the problems of sheet metal tilting or insecure clamping that may be caused by unilateral drive, achieving stable and reliable clamping and releasing actions, and further improving cutting accuracy.
[0012] As an improvement, rubber pads are provided on both chucks facing each other. With this structure, the rubber pads on the chucks increase the friction between the chucks and the surface of the sheet, making the clamping more secure and preventing the sheet from slipping during the cutting process. On the other hand, the rubber pads, as elastic buffers, can effectively prevent the hard chucks from directly contacting and damaging the surface of the sheet, thus providing good protection for the sheet.
[0013] As an improvement, the feeding area is equipped with an auxiliary roller conveyor located between the two conveyor roller conveyors. This structure provides additional support for the middle of the sheet material, which is especially important for large or thin sheets. It can effectively prevent the sheet material from deflecting excessively in the middle due to its own weight, ensuring that the sheet material remains flat throughout the feeding and conveying process, laying the foundation for subsequent precise positioning and cutting.
[0014] As an improvement, the laser cutting assembly includes a laser head, a fourth lead screw assembly, and a fifth motor. The laser head is slidably connected to the gantry in the left-right direction. Both the fourth lead screw assembly and the fifth motor are connected to the gantry. The laser head is connected to the fourth lead screw assembly, and the fifth motor is connected to the fourth lead screw assembly. With this structure, the laser head is driven to move left and right along the gantry by the fifth motor and the fourth lead screw assembly, which greatly expands the processing range of laser cutting. This allows the device to flexibly handle plates of different widths, thereby improving processing flexibility and overall production efficiency. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0016] Figure 2 This is a top view of the present invention.
[0017] Figure 3 This is a three-dimensional structural diagram of the connecting plate portion in this invention.
[0018] Figure 4 This is a cross-sectional view of the first clamping component and the second clamping component in this invention.
[0019] Reference numerals: 1. Frame; 101. Loading area; 102. Processing area; 103. Unloading area; 2. Through groove; 3. Conveyor roller conveyor; 4. Gantry frame; 5. Laser cutting assembly; 51. Laser head; 52. Fourth lead screw pair; 53. Fifth motor; 6. Mounting frame; 7. Connecting plate; 9. First clamping assembly; 10. First motor; 11. First lead screw pair; 12. First guide rail pair; 13. Second motor; 14. Second lead screw pair; 15. Second guide rail pair; 16. Rack; 17. Gear; 18. Limiting assembly; 181. Frame; 182. Limiting roller; 19. Third motor; 20. Third lead screw pair; 21. Third guide rail pair; 22. Second clamping assembly; 23. Mounting base; 24. First screw; 25. Fourth motor; 26. Chuck; 27. Auxiliary roller conveyor; 28. Mounting plate; 29. Second screw. Detailed Implementation
[0020] The following is a detailed description of a ship plate processing device according to the present invention, with reference to the accompanying drawings.
[0021] like Figures 1 to 4 As shown, a ship plate processing device includes a frame 1, two conveyor rollers 3, a gantry frame 4, a laser cutting assembly 5, a mounting frame 6, a connecting plate 7, a first drive assembly, a first clamping assembly 9, and a second drive assembly. The frame 1 includes a loading area 101, a processing area 102, and a unloading area 103 from front to back. The unloading area 103 is provided with a through groove 2. The two conveyor rollers 3 are both provided on the frame 1 and extend from the loading area 101 to the unloading area 103. The two conveyor rollers 3 are located on the left and right sides of the through groove 2. The loading area 101 is provided with an auxiliary roller 27 located between the two conveyor rollers 3. The specific structures of the conveyor rollers 3 and the auxiliary roller 27 are existing technologies and will not be described in detail here.
[0022] like Figure 1 As shown, the gantry frame 4 is located in the processing area 102, and the laser cutting assembly 5 is connected to the gantry frame 4. The laser cutting assembly 5 includes a laser head 51, a fourth lead screw assembly 52, and a fifth motor 53. The laser head 51 is slidably connected to the gantry frame 4 in the left-right direction. Both the fourth lead screw assembly 52 and the fifth motor 53 are connected to the gantry frame 4. The laser head 51 is connected to the fourth lead screw assembly 52, and the fifth motor 53 is connected to the fourth lead screw assembly 52. In addition, in some other embodiments, a drive assembly for driving the laser head 51 to move vertically can also be provided as needed. It should be noted that in order to prevent laser damage to the conveyor roller 3 during laser cutting, the laser head 51 is located above the space between the two rollers.
[0023] like Figure 1As shown, the mounting frame 6 is connected to the bottom of the unloading area 103. The connecting plate 7 is slidably connected to the mounting frame 6 in the front-to-back direction. The first drive assembly is connected to the mounting frame 6 and drives the connecting plate 7 to slide back and forth. The first clamping assembly 9 is rotatably connected to the connecting plate 7 and the rotation axis is set in the left-to-right direction. By rotating the first clamping assembly 9, the first clamping assembly 9 is located on the rear side of the plate and can clamp the rear end of the plate or be lower than the conveyor roller 3. The second drive assembly is connected to the connecting plate 7 and drives the first clamping assembly 9 to rotate. The first clamping assembly 9 is exposed through the through groove 2 and thus located on the rear side of the plate.
[0024] The sheet material to be cut is hoisted onto the conveyor roller 3 on the frame 1. The conveyor roller 3 transports the sheet material from front to back. When the sheet material contacts the first clamping component 9, the transport stops and the first clamping component 9 clamps the rear end of the sheet material, improving the cutting accuracy and stability. At this time, the laser cutting component 5 cuts the sheet material. After the cutting is completed, the first clamping component 9 releases the sheet material, and the second drive component drives the first clamping component 9 to rotate, so that the first clamping component 9 is lower than the conveyor roller 3. The conveyor roller 3 can continue to transport the cut sheet material to the rear, and can also continue to transport the uncut sheet material to the rear, realizing automated cutting of the sheet material and improving the cutting efficiency. In addition, the front and rear position of the laser cutting component 5 remains constant, while the first drive component can drive the connecting plate 7 and drive the first clamping component 9 to move back and forth, thereby changing the front and rear position of the first clamping component 9. By changing the front and rear position of the first clamping component 9, different cutting lengths of the sheet material can be achieved, improving the consistency of the cutting size and the cutting accuracy.
[0025] like Figure 2 As shown, the first drive assembly includes a first motor 10, a first lead screw pair 11, and a first guide rail pair 12. The first motor 10, the first lead screw pair 11, and the first guide rail pair 12 are all connected to the mounting bracket 6. A connecting plate 7 connects the first lead screw pair 11 and the first guide rail pair 12. The output shaft of the first motor 10 is connected to the first lead screw pair 11. The first motor 10 is a servo motor. Each lead screw pair involved in this invention includes a ball screw and a lead screw nut, and each guide rail pair includes a guide rail and a slider. Their specific working principles are all existing technologies and will not be elaborated here. Other motors can be selected as servo motors as needed.
[0026] like Figure 3 As shown, the second drive assembly includes a second motor 13, a second lead screw pair 14, a second guide rail pair 15, a rack 16, and two gears 17. The second motor 13, the second lead screw pair 14, and the second guide rail pair 15 are all connected to the connecting plate 7. The rack 16 is connected to the second lead screw pair 14 and slides along the front-back direction to connect to the second guide rail pair 15. The two gears 17 are respectively connected to the left and right sides of the first clamping assembly 9. The rack 16 is provided with two rack portions that mesh with the two gears 17 respectively.
[0027] like Figure 1 As shown, the feeding area 101 is provided with two limiting components 18 and two third drive components. The two limiting components 18 are slidably connected to the feeding area 101 in the left and right directions and are located outside the two conveying roller tracks 3. The two third drive components drive the two limiting components 18 to move towards or away from each other, and the two limiting components 18 move synchronously. Each limiting component 18 includes a frame 181 and several limiting rollers 182. The several limiting rollers 182 are rotatably connected to the frame 181 in the vertical direction and are equidistantly distributed in the front and back directions.
[0028] By setting a left-right movable limiting component 18, it can adapt to plates of different widths. When the plate is conveyed to the feeding area 101, the two limiting components 18 can move towards each other to guide and center the plate from the left and right sides, preventing the plate from tilting or deviating during the conveying process. This further improves the positioning accuracy of the first clamping component 9 in the front-back direction of the plate, thereby improving the cutting accuracy and the consistency of the cutting size. The several limiting rollers 182 on the limiting component 18 reduce the friction with the side of the plate, so that the plate can still be smoothly conveyed backward while being limited.
[0029] like Figure 1 As shown, the third drive assembly includes a third motor 19, a third lead screw pair 20, and a third guide rail pair 21. The third motor 19, the third lead screw pair 20, and the third guide rail pair 21 are all connected to the feeding area 101. The limiting assembly 18 is connected to the third lead screw pair 20 and the third guide rail pair 21. The output shaft of the third motor 19 is connected to the third lead screw pair 20.
[0030] like Figure 2 As shown, each limiting component 18 has a second clamping component 22 connected to its rear end for clamping the left or right side of the plate.
[0031] like Figure 4 As shown, both the first clamping assembly 9 and the second clamping assembly 22 include a mounting base 23, a first screw 24, a fourth motor 25, and two chucks 26. The first screw 24 is rotatably connected to the mounting base 23 in a vertical direction. The first screw 24 is provided with a first threaded section and a second threaded section with opposite directions of rotation. The two chucks 26 are slidably connected to the mounting base 23 in a vertical direction and are threadedly connected to the first threaded section and the second threaded section, respectively. The fourth motor 25 is connected to the mounting base 23 and drives the first screw 24 to rotate. Rubber pads are provided on the two chucks 26 facing each other.
[0032] A second clamping component 22 is provided at the rear end of the limiting component 18, enabling it to clamp the plate from both sides after the plate has been initially aligned. This, combined with the first clamping component 9 clamping from the rear end, achieves multi-point, multi-directional clamping of the plate, greatly enhancing the overall rigidity and stability of the plate during laser cutting, effectively suppressing the adverse effects of cutting vibration, and thus further ensuring cutting accuracy and cut quality. When the fourth motor 25 drives the first screw 24 to rotate, the two chucks 26 move synchronously towards or away from each other. This structure ensures that the clamping force is evenly applied to both sides of the plate, avoiding the problems of plate tilting or insecure clamping that may be caused by unilateral driving, achieving stable and reliable clamping and releasing actions, and further improving cutting accuracy.
[0033] Furthermore, continue to refer to Figure 4 The first clamping assembly 9 and the second clamping assembly 22 both include a mounting plate 28 and a second screw 29. The mounting base 23 is slidably connected to the mounting plate 28 in a vertical direction, and the second screw 29 is rotatably connected to the mounting plate 28 in a vertical direction and threadedly connected to the mounting base 23. Since the height of the lower end face of the plate is constant, while the height of its upper end face varies due to the thickness of the plate, the height of the mounting base 23 can be adjusted as a whole by rotating the second screw 29. This allows the two clamps 26 to clamp the upper and lower end faces of the plate simultaneously when the clamps 26 are aligned and clamped. This also avoids the problem of the plate tilting or not being clamped securely, and can adapt to plates of different thicknesses.
[0034] There are several ways to transport the cut sheet metal. For example, the first clamping component 9 clamps the cut sheet metal and moves it backward a certain distance before releasing it. The first clamping component 9 is then rotated to avoid obstructing the transport of the sheet metal. The cut sheet metal and the uncut sheet metal are then transported by the conveyor roller 3. Alternatively, after the sheet metal is cut, the first clamping component 9 releases the cut sheet metal and rotates to obstruct the transport of the sheet metal. At this time, the second clamping component 22 still clamps the uncut sheet metal. The conveyor roller 3 is then started to transport the cut sheet metal. The uncut sheet metal is held by the second clamping component 22 and cannot move. After the cut sheet metal has been transported a certain distance, the second clamping component 22 releases the uncut sheet metal.
[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
Claims
1. A ship plate processing device, characterized in that, include: The frame (1) includes, from front to back, a loading area (101), a processing area (102) and a unloading area (103), wherein the unloading area (103) is provided with a through groove (2); Two conveyor rollers (3) are both located on the frame (1) and extend from the loading area (101) to the unloading area (103). The two conveyor rollers (3) are located on the left and right sides of the through groove (2). A gantry frame (4) is located in the processing area (102). Laser cutting assembly (5) is connected to the gantry (4); Mounting bracket (6) is connected to the bottom end of the unloading area (103); The connecting plate (7) is slidably connected to the mounting bracket (6) in the front-to-back direction; The first drive assembly is connected to the mounting bracket (6) and drives the connecting plate (7) to slide back and forth; The first clamping assembly (9) is rotatably connected to the connecting plate (7) and the rotation axis is set in the left and right direction. By rotating the first clamping assembly (9), the first clamping assembly (9) is located on the rear side of the plate and can clamp the rear end of the plate or below the conveying roller (3). The second drive assembly is connected to the connecting plate (7) and drives the first clamping assembly (9) to rotate.
2. The ship plate processing apparatus according to claim 1, characterized in that, The first drive assembly includes a first motor (10), a first lead screw pair (11), and a first guide rail pair (12). The first motor (10), the first lead screw pair (11), and the first guide rail pair (12) are all connected to the mounting bracket (6). The connecting plate (7) connects the first lead screw pair (11) and the first guide rail pair (12). The output shaft of the first motor (10) is connected to the first lead screw pair (11).
3. The ship plate processing apparatus according to claim 1, characterized in that, The second drive assembly includes a second motor (13), a second lead screw pair (14), a second guide rail pair (15), a rack (16), and two gears (17). The second motor (13), the second lead screw pair (14), and the second guide rail pair (15) are all connected to the connecting plate (7). The rack (16) is connected to the second lead screw pair (14) and slides along the front-back direction to connect to the second guide rail pair (15). The two gears (17) are respectively connected to the left and right sides of the first clamping assembly (9). The rack (16) is provided with two rack portions that mesh with the two gears (17) respectively.
4. The ship plate processing apparatus according to claim 1, characterized in that, The feeding area (101) is provided with two limiting components (18) and two third driving components. The two limiting components (18) are slidably connected to the feeding area (101) in the left-right direction and located outside the two conveying rollers (3). The two third driving components drive the two limiting components (18) to move towards or away from each other. Each limiting component (18) includes a frame (181) and several limiting rollers (182). The several limiting rollers (182) are rotatably connected to the frame (181) in the vertical direction and are equidistantly distributed in the front-back direction.
5. The ship plate processing apparatus according to claim 4, characterized in that, The third drive assembly includes a third motor (19), a third lead screw pair (20), and a third guide rail pair (21). The third motor (19), the third lead screw pair (20), and the third guide rail pair (21) are all connected to the feeding area (101). The limiting assembly (18) is connected to the third lead screw pair (20) and the third guide rail pair (21). The output shaft of the third motor (19) is connected to the third lead screw pair (20).
6. The ship plate processing apparatus according to claim 4, characterized in that, Each of the limiting components (18) is connected to a second clamping component (22) at its rear end for clamping the left or right side of the plate.
7. The ship plate processing apparatus according to claim 6, characterized in that, Both the first clamping assembly (9) and the second clamping assembly (22) include a mounting base (23), a first screw (24), a fourth motor (25), and two chucks (26). The first screw (24) is rotatably connected to the mounting base (23) in a vertical direction. The first screw (24) is provided with a first thread segment and a second thread segment with opposite directions of rotation. The two chucks (26) are slidably connected to the mounting base (23) in a vertical direction and are threadedly connected to the first thread segment and the second thread segment, respectively. The fourth motor (25) is connected to the mounting base (23) and drives the first screw (24) to rotate.
8. The ship plate processing apparatus according to claim 7, characterized in that, The two clamps (26) are provided with rubber pads facing each other.
9. The ship plate processing apparatus according to claim 1, characterized in that, The feeding area (101) is provided with an auxiliary roller conveyor (27) located between the two conveying roller conveyors (3).
10. The ship plate processing apparatus according to claim 1, characterized in that, The laser cutting assembly (5) includes a laser head (51), a fourth lead screw assembly (52), and a fifth motor (53). The laser head (51) is slidably connected to the gantry frame (4) in the left-right direction. The fourth lead screw assembly (52) and the fifth motor (53) are both connected to the gantry frame (4). The laser head (51) is connected to the fourth lead screw assembly (52), and the fifth motor (53) is connected to the fourth lead screw assembly (52).