High-strength steel laser welding machining equipment

Abstract

The invention discloses high-strength steel laser welding processing equipment, which relates to the technical field of laser welding, and comprises a mounting cabinet and a laser welder, and further comprises a welding mechanism for performing laser welding on a high-strength steel plate, the welding mechanism comprises a sliding rail fixedly connected to the upper end of the mounting cabinet, a hollow block is slidably connected to the inner wall of the sliding rail, a T-shaped sliding block is slidably connected to the inner wall of the hollow block, a spring is fixedly connected between the inner wall of the hollow block and the T-shaped sliding block, a fixing rod is fixedly connected to the lower end of the T-shaped sliding block, and a groove is formed in the lower end of the hollow block. Through the ray thickness measuring sensor and the PLC control system, the thickness of the to-be-welded high-strength steel plate can be monitored in real time, the swing amplitude of the laser welding device is automatically and cooperatively adjusted according to the ray thickness measuring sensor and the PLC control system, fusion penetration is prevented, the fusion depth is ensured, full-automatic adjustment is achieved in the process, manual intervention is not needed, the process window is greatly widened, and technical dependence on operators is reduced.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding equipment for high-strength steel. Background Technology

[0002] Laser welding, as a modern welding technology with high energy density, high efficiency, and high precision, has been widely used in fields such as steel, automobiles, and aerospace. It melts materials with a focused laser beam to form a weld, and is especially suitable for joining advanced materials such as high-strength steel to meet the dual requirements of lightweight and high strength structures.

[0003] Chinese invention patent CN119772388B discloses an environmentally friendly fully automatic laser welding device and method for metal steel plates. The device includes a housing with a worktable mounted at the front. A light-shielding curtain is slidably connected to the bottom of the worktable via a guide rail, surrounding a mounting frame and a projection plate. Industrial cameras are mounted at the bottom of the mounting frame and the top of the housing. A welding robotic arm is located at the rear of the worktable, and both the welding robotic arm and the positioning plate are electrically connected to a control box. A laser head is mounted inside a fixed frame, with a laser generator connected to its end. The laser head emits direct light downwards through the operation of the projection frame. A machine vision system calculates the path coordinates of the weld seam and transmits this data to the welding robotic arm via Bluetooth for coordinate updates and path planning. This enables automated welding, reducing the time wasted on manual programming, and is particularly efficient for curved welds.

[0004] Based on the aforementioned existing technologies, it has been found that during laser welding, the laser beam moves linearly, and the energy is continuously applied to an extremely narrow line, forming a nail-shaped weld with a large depth-to-width ratio and highly concentrated heat. For high-strength steel plates, the weld is prone to process porosity and a large amount of spatter. Furthermore, high-strength steel usually has a high content of alloying elements and a high hardening tendency. Laser welding cools extremely quickly, which easily forms coarse columnar crystals or brittle martensite structures in the weld and heat-affected zone. This leads to a decrease in weld toughness and plasticity, an increase in residual stress, and affects the structural safety and fatigue life. In addition, the required heat input strategies are completely opposite for high-strength steel plates of different thicknesses. When welding thin plates, energy needs to be dispersed to prevent melt-through, while when welding thick plates, energy needs to be concentrated to ensure full penetration. Most existing laser welding equipment adopts linear welding and lacks the ability to adjust the heat distribution in real time and adaptively according to the thickness of the plate, making it highly dependent on the operator's experience. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention adopts the following technical solution: A high-strength steel laser welding processing equipment includes a mounting cabinet and a laser welder, and also includes a welding mechanism for laser welding high-strength steel plates; The welding mechanism includes a sliding rail fixedly connected to the upper end of the mounting cabinet. A hollow block is slidably connected to the inner wall of the sliding rail. A T-shaped slider is slidably connected to the inner wall of the hollow block. A spring is fixedly connected between the inner wall of the hollow block and the T-shaped slider. A fixing rod is fixedly connected to the lower end of the T-shaped slider. A groove is formed at the lower end of the hollow block. The side wall of the fixing rod is slidably connected to the inner wall of the groove. The lower end of the fixing rod passes through the groove and is fixedly connected to a drive rod. Two adjusting slide rails are symmetrically slidably connected to the inner wall of the sliding rail. Multiple mounting blocks are slidably connected to the inner walls of the two adjusting slide rails. The mounting blocks on both sides are staggered. A fixing shaft is fixedly connected to the side wall of each mounting block. A hemisphere is fixedly connected to one end of the fixing shaft. A drive assembly for driving the adjusting slide rails to slide is installed on the sliding rail.

[0006] Preferably, the welding mechanism further includes an electric slide rail fixedly connected to the upper end of the T-shaped slider, and a mounting bracket is slidably connected to the side wall of the electric slide rail, and the laser welder is fixedly connected to the side wall of the mounting bracket.

[0007] Preferably, an electric push rod is fixedly connected to the side wall of the sliding track, and the movable end of the electric push rod passes through the side wall of the sliding track and is fixedly connected to the hollow block.

[0008] Preferably, the drive assembly includes two electric push rods symmetrically and fixedly connected to the side wall of the sliding track, and the movable ends of the two electric push rods penetrate through the side wall of the sliding track and are fixedly connected to the adjusting slide rail.

[0009] Preferably, the drive assembly further includes a X-ray thickness sensor fixedly connected to the side wall of the laser welder, and the X-ray thickness sensor is connected to the electric push rod two via a PLC control circuit.

[0010] Preferably, the X-ray thickness sensor and the electric push rod are connected via a PLC control circuit.

[0011] Preferably, an adjustment mechanism is installed on the fixed shaft. The adjustment mechanism includes an adjustment rod rotatably connected to the side wall of the fixed shaft, and the ends of two adjacent adjustment rods are rotatably connected to each other. A rotating shaft is rotatably connected to the inner wall of each of the two adjustment slide rails. A connecting rod is fixedly connected to the side wall of the rotating shaft, and one end of the connecting rod is rotatably connected to one end of its adjacent adjustment rod.

[0012] Preferably, the adjusting mechanism further includes a fixed plate fixedly connected to the side wall of the adjusting slide rail. A rotating rod is rotatably connected to the upper end of the fixed plate. A bevel gear one is fixedly connected to the upper end of the rotating rod. A bevel gear two is fixedly connected to one end of the rotating shaft. The bevel gear one and the bevel gear two are meshed together. A gear is fixedly connected to the lower end of the rotating shaft through the lower end of the fixed plate. Two racks are fixedly connected to the bottom of the sliding rail. The gears and racks are meshed together.

[0013] Preferably, a welding table is fixedly connected to the upper end of the mounting cabinet, and a hydraulic cylinder is fixedly connected to the side wall of the welding table. The movable end of the hydraulic cylinder passes through the inner wall of the welding table and is fixedly connected to a clamping plate.

[0014] Preferably, a protective cover is fixedly connected to the upper end of the mounting cabinet.

[0015] The present invention has the following beneficial effects: 1. By setting up a welding mechanism and drive components, and using a X-ray thickness sensor and a PLC control system, the thickness of the high-strength steel plate to be welded can be monitored in real time. Based on this, the oscillation amplitude of the laser welder can be automatically and collaboratively adjusted. For thinner high-strength steel plates, the oscillation amplitude of the laser welder is larger, which effectively disperses heat input and prevents melt-through. For thicker high-strength steel plates, the oscillation amplitude is smaller, which can concentrate energy to ensure the depth of penetration. This process is fully automatic and requires no manual intervention, which greatly expands the process window and reduces the technical dependence on operators. 2. Through a mechanical oscillation mechanism composed of a drive rod and staggered hemispheres, the laser beam moves along a continuous wave-shaped trajectory during the welding process. This regular oscillation can continuously stir the molten pool, stabilize the pinhole, and significantly promote the escape of bubbles, thereby effectively suppressing the generation of process porosity and greatly reducing welding spatter. Secondly, the oscillation of the laser beam strongly disturbs the flow of molten metal, breaks up the tips of dendrite growth, increases nucleation points, and thus refines the micro-grain structure of the weld, which helps to improve the strength, plasticity, and toughness of the weld and improve its comprehensive mechanical properties. Finally, oscillating welding distributes heat to a wider area, reduces the peak temperature at the center of the weld, and slows down the cooling rate. This is particularly beneficial for heat-sensitive materials such as high-strength steel, as it can reduce the tendency of weld hardening, reduce residual stress, and reduce welding deformation. 3. By setting up an adjustment mechanism, the adjustment mechanism, through the ingenious linkage of gears, racks and pinions, ensures that while adjusting the swing amplitude, the position of all hemispheres can be adjusted equidistantly and synchronously. This achieves linkage matching between the swing frequency and the swing amplitude, and increases the frequency synchronously when the swing amplitude is increased. This avoids the problem of discontinuous weld seams that may be caused by excessive swing amplitude, and ensures the uniformity and continuity of the wavy weld seam trajectory, thereby obtaining a consistent and high-quality weld seam. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a high-strength steel laser welding processing equipment proposed in this invention; Figure 2 for Figure 1 A three-dimensional structural diagram of the middle section without a protective cover; Figure 3 This is a three-dimensional structural diagram of the welding mechanism in this invention; Figure 4 for Figure 3 Cross-sectional view of the middle structure; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the diagram; Figure 6 for Figure 3 A schematic diagram of the horizontal cross-sectional structure of the sliding track; Figure 7 for Figure 3 A schematic diagram of the vertical cross-sectional structure of the sliding track; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B in the diagram.

[0017] In the diagram: 1. Mounting cabinet; 2. Laser welder; 3. Sliding rail; 4. Hollow block; 5. T-shaped slider; 6. Spring; 7. Fixing rod; 8. Drive rod; 9. Groove; 10. Adjusting slide rail; 11. Mounting block; 12. Fixing shaft; 13. Hemisphere; 14. Electric slide rail; 15. Mounting bracket; 16. Electric push rod one; 17. Adjusting rod; 18. Rotating shaft; 19. Connecting rod; 20. Fixing plate; 21. Rotating rod; 22. Bevel gear one; 23. Bevel gear two; 24. Gear; 25. Rack; 26. Electric push rod two; 27. X-ray thickness sensor; 28. Welding table; 29. ​​Hydraulic cylinder; 30. Clamping plate; 31. Protective cover. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Reference Figures 1-8 A high-strength steel laser welding processing equipment includes a mounting cabinet 1 and a laser welder 2. The laser welding head on the laser welder 2 can emit a laser beam to weld the workpiece. The laser welder 2 is existing technology and will not be described in detail here. It also includes a welding mechanism for laser welding high-strength steel plates. A welding table 28 is fixedly connected to the upper end of the mounting cabinet 1. A hydraulic cylinder 29 is fixedly connected to the side wall of the welding table 28. The movable end of the hydraulic cylinder 29 passes through the inner wall of the welding table 28 and is fixedly connected to a clamping plate 30. Furthermore, the high-strength steel plate is placed on the upper end of the welding table 28, and then the hydraulic cylinder 29 is driven to extend, which moves the clamping plate 30. The clamping plate 30, in conjunction with the inner wall of the welding table 28, clamps and fixes the high-strength steel plate. Then, the electric slide rail 14 is activated, which moves the mounting frame 15, and in turn moves the laser welder 2, so that the laser welding head on the laser welder 2 is located directly above the joint of the high-strength steel plate.

[0020] The welding mechanism includes a sliding rail 3 fixedly connected to the upper end of the mounting cabinet 1. A hollow block 4 is slidably connected to the inner wall of the sliding rail 3. A T-shaped slider 5 is slidably connected to the inner wall of the hollow block 4. A spring 6 is fixedly connected between the inner wall of the hollow block 4 and the T-shaped slider 5. A fixing rod 7 is fixedly connected to the lower end of the T-shaped slider 5. A groove 9 is opened at the lower end of the hollow block 4. The side wall of the fixing rod 7 is slidably connected to the inner wall of the groove 9. The lower end of the fixing rod 7 passes through the groove 9 and is fixedly connected to a drive rod 8. Two adjusting slide rails 10 are symmetrically slidably connected to the inner wall of the sliding rail 3. Multiple mounting blocks 11 are slidably connected to the inner walls of the two adjusting slide rails 10. The multiple mounting blocks 11 located on both sides are staggered. A fixing shaft 12 is fixedly connected to the side wall of each mounting block 11. A hemisphere 13 is fixedly connected to one end of the fixing shaft 12. A drive assembly for driving the adjusting slide rails 10 to slide is installed on the sliding rail 3.

[0021] The welding mechanism also includes an electric slide rail 14 fixedly connected to the upper end of the T-shaped slider 5. The side wall of the electric slide rail 14 is slidably connected to a mounting frame 15. The electric slide rail 14 is a standardized automated mechanical unit that converts the motion of a rotary motor into high-precision, high-rigidity linear motion. It can make the mounting frame 15 move horizontally and linearly. This is existing technology and will not be described in detail here. The laser welder 2 is fixedly connected to the side wall of the mounting frame 15.

[0022] An electric push rod 16 is fixedly connected to the side wall of the sliding track 3. The movable end of the electric push rod 16 passes through the side wall of the sliding track 3 and is fixedly connected to the hollow block 4.

[0023] It should be noted that, as Figure 7 As shown, the two side walls of the T-shaped slider 5 are in contact with the inner wall of the hollow block 4. Therefore, the T-shaped slider 5 can only slide in the front and back direction where the spring 6 is set. When the electric push rod 16 pushes the hollow block 4 to slide, the T-shaped slider 5 can move horizontally together with the hollow block 4.

[0024] Furthermore, the electric push rod 16 is activated, its movable end extends, driving the hollow block 4 to slide uniformly along the sliding track 3. The hollow block 4, through the T-shaped slider 5 and the mounting bracket 15, drives the laser welder 2 to perform a synchronous horizontal main motion (e.g., Figure 3 and Figure 7 As shown, the laser welding head on the laser welder 2 emits a laser beam to weld high-strength steel plates. During the welding process, the horizontal movement of the T-shaped slider 5 drives the fixed rod 7 to move, which in turn drives the drive rod 8 to move. When the drive rod 8 moves to abut against the hemisphere 13, the hemisphere 13 pushes the drive rod 8 to one side. Because multiple staggered hemispheres 13 are arranged on both sides of the sliding track 3, the drive rod 8 will shift back and forth to both sides within the sliding track 3, thereby pushing the T-shaped slider 5 to overcome the resistance of the spring 6 and slide laterally back and forth within the hollow block 4. This sliding is ultimately transformed into a regular lateral oscillation of the laser welding head in the direction of travel through the electric slide rail 14 and the mounting bracket 15. The composite motion trajectory is continuous. Compared to existing linear laser beams, the wavy laser beam offers several advantages. First, it continuously and regularly stirs and smooths the keyhole and weld wall, enhancing keyhole stability and effectively preventing process porosity caused by keyhole collapse, while significantly reducing spatter. Second, the wavy laser beam strongly disturbs the flow of molten metal, breaking dendrite tips and increasing nucleation points, thereby refining the grain size of the weld metal and improving its strength, plasticity, and toughness. Finally, the wavy laser beam distributes heat over a wider area, reducing the peak temperature in the middle region of the weld and slowing down the cooling rate. This helps reduce hardening tendency, lower residual stress, and allows more time for gases in the weld metal to escape, making it particularly suitable for heat-sensitive materials such as high-strength steel.

[0025] The drive assembly includes two electric push rods 26 that are symmetrically fixedly connected to the side wall of the sliding rail 3. The movable ends of the two electric push rods 26 pass through the side wall of the sliding rail 3 and are fixedly connected to the adjusting slide rail 10.

[0026] The drive assembly also includes a X-ray thickness sensor 27 fixedly connected to the side wall of the laser welder 2. The X-ray thickness sensor 27 is connected to the electric push rod 26 via a PLC control circuit.

[0027] Furthermore, initially, after the high-strength steel plate is fixed, the X-ray thickness sensor 27 measures the thickness of the high-strength steel plate. Based on the thickness of the high-strength steel plate, the X-ray thickness sensor 27 emits different signals, which in turn control the extension length of the electric push rod 26 via the PLC control circuit. The thinner the high-strength steel plate, the longer the extension length of the electric push rod 26, causing the adjusting slide rails 10 on both sides to move closer together. This brings the hemispheres 13 on both sides closer together. At this point, when the drive rod 8 moves to abut against the hemisphere 13, the distance the drive rod 8 deflects to both sides will be greater. This results in a larger sliding distance for the T-shaped slider 5, a larger oscillation amplitude for the laser welder 2, and a larger weld pool. This allows for greater heat dispersion, preventing burn-through. Conversely, a thicker high-strength steel plate results in a smaller oscillation amplitude for the laser welder 2, leading to a narrower weld pool and more concentrated welding energy. This ensures a deeper weld penetration and thus guarantees welding quality. Therefore, the oscillation amplitude of the laser beam emitted by the laser welder 2 can be automatically adjusted according to the thickness of the high-strength steel plate, preventing burn-through while ensuring welding quality.

[0028] It should be noted that the X-ray thickness sensor 27 can calculate the thickness by utilizing the attenuation of X-rays when they penetrate the steel plate. As this is existing technology, it will not be elaborated here.

[0029] An adjustment mechanism is installed on the fixed shaft 12. The adjustment mechanism includes an adjustment rod 17 rotatably connected to the side wall of the fixed shaft 12, and the ends of two adjacent adjustment rods 17 are rotatably connected to each other. The inner walls of the two adjustment slide rails 10 are rotatably connected to a rotating shaft 18. A connecting rod 19 is fixedly connected to the side wall of the rotating shaft 18, and one end of the connecting rod 19 is rotatably connected to one end of its adjacent adjustment rod 17.

[0030] The adjustment mechanism also includes a fixed plate 20 fixedly connected to the side wall of the adjustment slide rail 10. A rotating rod 21 is rotatably connected to the upper end of the fixed plate 20. A bevel gear 22 is fixedly connected to the upper end of the rotating rod 21. A bevel gear 23 is fixedly connected to one end of the rotating shaft 18. The bevel gear 22 and the bevel gear 23 mesh with each other. The lower end of the rotating shaft 18 passes through the lower end of the fixed plate 20 and is fixedly connected to a gear 24. Two racks 25 are fixedly connected to the bottom of the sliding track 3. The gear 24 meshes with the racks 25.

[0031] Furthermore, when adjusting the oscillation amplitude of the laser welder 2, the movement of the adjusting slide rail 10 will drive the gear 24 to move. Since the gear 24 meshes with the rack 25, the gear 24 will rotate synchronously, driving the rotating rod 21 to rotate, which in turn drives the first bevel gear 22 to rotate, and the second bevel gear 23 to rotate, thereby driving the rotating shaft 18 to rotate, causing the connecting rod 19 to rotate. The connecting rod 19 will drive the mounting block 11 to slide through the adjusting rod 17, and the mounting block 11 will drive the next mounting block 11 to slide through the adjusting rod 17. At this time, the adjusting rod 17 will also rotate synchronously. By analogy, all mounting blocks 11 slide synchronously and at equal distances. When the high-strength steel plate is thinner, the mounting blocks 11 will slide closer to the electric push rod 16, which makes the hemispheres 13 more densely distributed. At this time, the number of times the laser welder 2 swings back and forth within a unit distance increases, which is equivalent to increasing the swing frequency of the laser welder 2. Since the swing amplitude of the laser welder 2 is larger at this time, the resulting weld may be discontinuous. Therefore, by synchronously increasing the swing frequency of the laser welder 2, the continuity between welds is better, thereby ensuring the welding quality.

[0032] The X-ray thickness sensor 27 is connected to the electric push rod 16 via a PLC control circuit.

[0033] Furthermore, the X-ray thickness sensor 27 sends signals to control the extension speed of the electric push rod 16 according to the different thicknesses of the high-strength steel plate. For thinner high-strength steel plates, the extension speed of the electric push rod 16 is slower, thereby appropriately reducing the moving speed of the laser welder 2. Combined with increasing the oscillation frequency of the laser welder 2, it can ensure that the formed weld is uniform and continuous.

[0034] A protective cover 31 is fixedly connected to the upper end of the mounting cabinet 1. The protective cover 31 serves a protective function to prevent spatter generated during welding from injuring workers.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-strength steel laser welding processing equipment comprising a mounting cabinet (1) and a laser welder (2), characterized in that, It also includes welding mechanisms for laser welding of high-strength steel plates; The welding mechanism includes a sliding rail (3) fixedly connected to the upper end of the mounting cabinet (1). A hollow block (4) is slidably connected to the inner wall of the sliding rail (3). A T-shaped slider (5) is slidably connected to the inner wall of the hollow block (4). A spring (6) is fixedly connected between the inner wall of the hollow block (4) and the T-shaped slider (5). A fixing rod (7) is fixedly connected to the lower end of the T-shaped slider (5). A groove (9) is opened at the lower end of the hollow block (4). The side wall of the fixing rod (7) is slidably connected to the inner wall of the groove (9). The end of the sliding track (3) is through the groove (9) and fixedly connected to the drive rod (8). The inner wall of the sliding track (3) is symmetrically connected to two adjusting slide rails (10). The inner walls of the two adjusting slide rails (10) are slidably connected to multiple mounting blocks (11). The multiple mounting blocks (11) located on both sides are staggered. Each mounting block (11) is fixedly connected to a fixed shaft (12) on its side wall. One end of the fixed shaft (12) is fixedly connected to a hemisphere (13). The sliding track (3) is equipped with a drive assembly for driving the adjusting slide rails (10) to slide.

2. The high strength steel laser welding apparatus of claim 1, wherein, The welding mechanism also includes an electric slide rail (14) fixedly connected to the upper end of the T-shaped slider (5), and a mounting bracket (15) is slidably connected to the side wall of the electric slide rail (14), and the laser welder (2) is fixedly connected to the side wall of the mounting bracket (15).

3. The high strength steel laser welding apparatus of claim 1, wherein, An electric push rod (16) is fixedly connected to the side wall of the sliding track (3). The movable end of the electric push rod (16) passes through the side wall of the sliding track (3) and is fixedly connected to the hollow block (4).

4. The high strength steel laser welding apparatus of claim 3, wherein, The drive assembly includes two electric push rods (26) that are symmetrically fixedly connected to the side wall of the sliding rail (3). The movable ends of the two electric push rods (26) pass through the side wall of the sliding rail (3) and are fixedly connected to the adjusting slide rail (10).

5. The high strength steel laser welding apparatus of claim 4, wherein, The drive assembly also includes a X-ray thickness sensor (27) fixedly connected to the side wall of the laser welder (2), and the X-ray thickness sensor (27) is connected to the electric push rod (26) via a PLC control circuit.

6. The high strength steel laser welding apparatus of claim 5, wherein, The X-ray thickness sensor (27) and the electric push rod (16) are connected by a PLC control circuit.

7. The high strength steel laser welding apparatus of claim 1, wherein, An adjustment mechanism is installed on the fixed shaft (12). The adjustment mechanism includes an adjustment rod (17) rotatably connected to the side wall of the fixed shaft (12), and the ends of two adjacent adjustment rods (17) are rotatably connected to each other. A rotating shaft (18) is rotatably connected to the inner wall of each of the two adjustment slide rails (10). A connecting rod (19) is fixedly connected to the side wall of the rotating shaft (18), and one end of the connecting rod (19) is rotatably connected to one end of its adjacent adjustment rod (17).

8. The high-strength steel laser welding processing equipment according to claim 7, characterized in that, The adjustment mechanism also includes a fixed plate (20) fixedly connected to the side wall of the adjustment slide rail (10). A rotating rod (21) is rotatably connected to the upper end of the fixed plate (20). A bevel gear (22) is fixedly connected to the upper end of the rotating rod (21). A bevel gear (23) is fixedly connected to one end of the rotating shaft (18). The bevel gear (22) meshes with the bevel gear (23). The lower end of the rotating shaft (18) passes through the lower end of the fixed plate (20) and is fixedly connected to a gear (24). Two racks (25) are fixedly connected to the bottom of the sliding track (3). The gear (24) meshes with the rack (25).

9. The high-strength steel laser welding processing equipment according to claim 1, characterized in that, The upper end of the installation cabinet (1) is fixedly connected to a welding table (28), and a hydraulic cylinder (29) is fixedly connected to the side wall of the welding table (28). The movable end of the hydraulic cylinder (29) passes through the inner wall of the welding table (28) and is fixedly connected to a clamp (30).

10. A high-strength steel laser welding processing equipment according to claim 1, characterized in that, The upper end of the installation cabinet (1) is fixedly connected to a protective cover (31).

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