A metal sheet laser welding apparatus

Abstract

This invention belongs to the field of laser welding technology, and specifically relates to a laser welding device for metal sheets. It includes a base, an L-shaped bracket fixedly mounted on the top of the base, a first cylinder mounted on the top of the L-shaped bracket, a mounting plate fixedly mounted on the moving end of the first cylinder, and a laser welding head fixedly mounted on the lower surface of the mounting plate. It also includes a welding table fixedly mounted on the top of the base, located below the laser welding head, with a welding groove longitudinally formed in the center of the upper surface of the welding table; and a moving mechanism mounted on the top of the L-shaped bracket, with the first cylinder connected to the moving mechanism. This invention, through the coordinated operation of a sheet thickness detection mechanism, a weld width detection mechanism, and a dust extraction mechanism working in conjunction with both, achieves automated segmented detection of the metal sheet thickness and weld width, precise dynamic adaptation of laser welding power, and simultaneous directional slag removal, dust removal, and bidirectional heat dissipation during the welding process, significantly improving welding quality.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, and in particular relates to a laser welding device for metal sheets. Background Technology

[0002] In the metal processing, laser welding has become one of the core processes for joining metal sheets due to its advantages such as concentrated energy density, high welding efficiency, and good weld formation. It is widely used in the production and manufacturing of various products such as electronic devices, automotive parts, and precision machinery, such as the metal sheet laser welding equipment disclosed in announcement number CN222679804U.

[0003] Currently, when welding two metal sheets together, gaps inevitably occur at the joint due to various factors such as the dimensional tolerances of the raw materials. Furthermore, the width of these gaps is not uniform, often showing significant differences across different sections of the weld. Since the quality of laser welding is closely related to the matching of laser power—for wider gaps, higher power lasers are needed to ensure sufficient weld fusion and avoid defects such as incomplete penetration; while for narrower gaps, excessively high laser power can easily lead to weld burn-through, collapse, or excessive spatter, severely impacting welding quality and product performance—existing laser welding equipment has significant limitations in addressing these issues. It typically employs a fixed power output mode or relies on operators to manually adjust the laser power through observation and experience. This method not only fails to adapt to the dynamic changes in the weld gap in real time and accurately but also easily leads to unstable welding quality due to human error. Simultaneously, it significantly increases the workload of operators, reduces production efficiency, and fails to meet the welding precision requirements of modern industrial production.

[0004] Therefore, a laser welding device for metal sheets is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a laser welding device for metal sheets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a metal sheet laser welding device, comprising a base, an L-shaped bracket fixedly mounted on the top of the base, a first cylinder mounted on the top of the L-shaped bracket, a mounting plate fixedly mounted on the moving end of the first cylinder, and a laser welding head fixedly mounted on the lower surface of the mounting plate, and further comprising: A welding table is fixedly installed on the top of the base and located below the laser welding head. A welding groove is longitudinally formed in the middle of the upper surface of the welding table. A moving mechanism is disposed on the top of the L-shaped bracket, and the first cylinder is connected to the moving mechanism; Two clamping mechanisms are respectively set on both sides of the upper surface of the welding table. The top side of the base is provided with a plate thickness detection mechanism connected to one of the clamping mechanisms, and the top other side of the base is provided with a dust collection mechanism connected to the other clamping mechanism. A gap width detection mechanism is disposed between one side of the mounting plate and the inside of the welding groove, and the air inlet of the gap width detection mechanism is connected to the plate thickness detection mechanism, and the dust collection mechanism is connected to the air outlet of the gap width detection mechanism. The controller is fixedly installed at one of the top corners of the base. The first cylinder, laser welding head, moving mechanism, clamping mechanism, plate thickness detection mechanism, dust collection mechanism and gap width detection mechanism are all electrically connected to the controller.

[0007] Preferably, the moving mechanism includes an electric slide rail fixedly mounted longitudinally on the top of the L-shaped bracket, an electric slider is provided inside the electric slide rail, and the first cylinder is fixedly mounted on the bottom of the electric slider.

[0008] Preferably, the clamping mechanism includes a fixed seat fixedly disposed on the upper surface of the welding table, a second cylinder fixedly disposed inside the fixed seat, and a hollow clamping plate fixedly disposed at the moving end of the second cylinder.

[0009] Preferably, the plate thickness detection mechanism includes an air pump fixedly mounted on the top of the base, a first air pipe fixedly mounted at the output end of the air pump, a three-way pipe fixedly mounted at the end of the first air pipe away from the air pump, a first switch valve fixedly mounted on the wall of one air outlet end of the three-way pipe, a first flexible hose fixedly mounted on the wall of the first flexible hose, a first air pressure sensor fixedly mounted on the wall of the first flexible hose, and a top of one of the hollow clamping plates fixedly connected at the end of the first flexible hose away from the three-way pipe, and a plurality of evenly distributed air holes opened on the side of one of the hollow clamping plates.

[0010] Preferably, the gap width detection mechanism includes a second flexible hose fixedly disposed on the other air outlet end of the three-way pipe, a second air blowing pipe fixedly disposed at an inclined end of the second flexible hose away from the three-way pipe, a fixing rod fixedly disposed on the side wall of the mounting plate, the second air blowing pipe fixedly disposed at the lower end of the fixing rod, a second switch valve fixedly disposed on the wall of the other air outlet end of the three-way pipe, an air guide pipe disposed inside the welding groove, the wall of the air guide pipe passing through the interior of the welding table and extending outward, a second air pressure sensor fixedly disposed on the wall of one end of the air guide pipe, a third switch valve fixedly disposed on the wall of the other end of the air guide pipe, and an elastic telescopic rod fixedly disposed between the wall of the air guide pipe and the side wall of the mounting plate.

[0011] Preferably, a limiting plate is fixedly provided on the wall of the air guide pipe, and a limiting rod is fixedly provided inside the welding table, with the limiting plate and the limiting rod being slidably connected.

[0012] Preferably, the elastic telescopic rod includes an outer rod fixedly connected to the air guide tube, an L-shaped inner rod slidably disposed inside the upper end of the outer rod, a spring fixedly disposed between one end of the L-shaped inner rod and the inner wall of the outer rod, and the other end of the L-shaped inner rod fixedly connected to the side wall of the mounting plate.

[0013] Preferably, the dust collection mechanism includes an air pump fixedly mounted on the top of the base. The suction end of the air pump is fixedly provided with an air suction pipe. A third flexible hose is fixedly provided on the wall of the air suction pipe. The end of the third flexible hose away from the air suction pipe is fixedly connected to the top of another hollow clamping plate. The side of the other hollow clamping plate is provided with a plurality of evenly distributed dust collection holes. A filter and a fourth switching valve are fixedly provided on the wall of the third flexible hose. The end of the air suction pipe away from the air pump is fixedly connected to the wall of the air guide pipe.

[0014] Compared with existing technologies, the advantages of this invention are as follows: 1. Through the set plate thickness detection mechanism, air is supplied to the hollow clamping plate by an air pump. The degree of obstruction of the air blowing hole of the clamping plate by the side wall of the metal sheet is used to correlate with the air pressure in the pipe. The first air pressure sensor accurately detects the air pressure change and feeds it back to the controller. The controller can quickly determine the actual thickness of the metal sheet according to the preset pressure-thickness calibration relationship, realizing the automated and non-contact detection of the metal sheet thickness. No manual measurement is required, which effectively avoids human measurement error. At the same time, it provides the core material parameter basis for the accurate setting of the initial welding power of the laser welding head, so that the initial welding power matches the sheet thickness and avoids welding defects such as incomplete penetration and burn-through caused by power and thickness mismatch, thus improving the basic stability of welding quality.

[0015] 2. The gap width detection mechanism, based on the plate thickness detection mechanism, directly reuses the air pump of the plate thickness detection mechanism as the air source. The air path is switched through a three-way pipe, eliminating the need for additional air supply equipment, simplifying the equipment structure and reducing manufacturing costs. At the same time, the mechanism blows air directionally into the weld seam through a second air pipe, and uses a second air pressure sensor on the air guide pipe to detect the air pressure passing through the weld seam, indirectly determining the weld seam width. This achieves automated segmented detection of weld seam width and real-time adaptation of welding power, accurately matching the width differences of different sections of the entire weld seam, and completely solving the problem that traditional equipment with fixed power welding or manual parameter adjustment cannot adapt to changes in weld seam width.

[0016] 3. Through the established dust collection mechanism, which works in conjunction with the plate thickness detection mechanism and the gap width detection mechanism, during the welding stage, the air pump of the plate thickness detection mechanism continuously blows air towards one side of the weld, diverting the welding slag, dust, and heat generated during welding to the other side. Simultaneously, the suction pump of the dust collection mechanism works, generating negative pressure through the dust collection holes in the hollow clamp on the other side to adsorb and collect the diverted welding slag and dust. After filtration by the filter on the third flexible hose, the dust is discharged, achieving directional collection and filtration of welding slag and dust, preventing impurities from adhering to the weld and affecting welding quality. In addition, the suction pipe of the dust collection mechanism is connected to the air guide pipe of the gap width detection mechanism, creating a stable negative pressure inside the air guide pipe. This quickly removes residual heat below the weld, and combined with the heat dissipation effect on the blowing side, achieves bidirectional heat dissipation of the weld, effectively reducing welding thermal deformation and improving the strength and stability of the welded joint. Attached Figure Description

[0017] Figure 1 This is a first-view perspective perspective of a laser welding device for metal sheets provided by the present invention; Figure 2 This is a second-view perspective perspective of a laser welding device for metal sheets provided by the present invention; Figure 3 This is a first-view perspective perspective view of the first cylinder, mounting plate, laser welding head, and welding table in a metal sheet laser welding equipment provided by the present invention. Figure 4 This is a second-view perspective perspective view of the first cylinder, mounting plate, laser welding head, and welding table in a metal sheet laser welding equipment provided by the present invention. Figure 5 This is a third-view perspective view of the first cylinder, mounting plate, laser welding head, and welding table in a metal sheet laser welding equipment provided by the present invention. Figure 6 This is a three-dimensional view of the welding table after being cut open in a metal sheet laser welding equipment provided by the present invention; Figure 7 This is a three-dimensional view of the elastic telescopic rod after being cut open in a metal sheet laser welding equipment provided by the present invention.

[0018] In the diagram: 1. Base, 2. L-shaped bracket, 3. First cylinder, 4. Mounting plate, 5. Laser welding head, 6. Welding table, 7. Welding groove, 8. Moving mechanism, 81. Electric slide rail, 82. Electric slider, 9. Clamping mechanism, 91. Fixed seat, 92. Second cylinder, 93. Hollow clamping plate, 10. Plate thickness detection mechanism, 101. Air pump, 102. First air blowing pipe, 103. T-pipe, 104. First switch valve, 105. First hose, 106. First air pressure sensor, 107. Air blowing hole, 11. Dust collection mechanism, 1 11. Air pump, 112. Air suction pipe, 113. Third hose, 114. Dust suction hole, 115. Filter, 116. Fourth switch valve, 12. Gap width detection mechanism, 121. Second hose, 122. Second air blowing pipe, 123. Fixing rod, 124. Second switch valve, 125. Air guide pipe, 126. Second air pressure sensor, 127. Third switch valve, 128. Elastic telescopic rod, 129. Limiting plate, 130. Limiting rod, 131. Outer rod, 132. L-shaped inner rod, 133. Spring, 13. Controller. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1-7 As shown, a metal sheet laser welding device includes a base 1, an L-shaped bracket 2 fixedly mounted on the top of the base 1, a first cylinder 3 mounted on the top of the L-shaped bracket 2, a mounting plate 4 fixedly mounted on the moving end of the first cylinder 3, and a laser welding head 5 fixedly mounted on the lower surface of the mounting plate 4. The device also includes: The welding table 6 is fixedly set on the top of the base 1 and is located below the laser welding head 5. A welding groove 7 is longitudinally opened in the middle of the upper surface of the welding table 6. Two metal sheets to be welded are placed on the upper surface of the welding table 6 so that the weld formed by splicing the two sheets is precisely aligned with the welding groove 7.

[0021] The moving mechanism 8 is located on the top of the L-shaped bracket 2, and the first cylinder 3 is connected to the moving mechanism 8. The moving mechanism 8 includes an electric slide rail 81 that is fixedly mounted longitudinally on the top of the L-shaped bracket 2. An electric slider 82 is provided inside the electric slide rail 81, and the first cylinder 3 is fixedly mounted on the bottom of the electric slider 82.

[0022] Two clamping mechanisms 9 are respectively disposed on both sides of the upper surface of the welding table 6. Each clamping mechanism 9 includes a fixed base 91 fixedly disposed on the upper surface of the welding table 6. A second cylinder 92 is fixedly disposed inside the fixed base 91. A hollow clamping plate 93 is fixedly disposed at the moving end of the second cylinder 92. The height of the two hollow clamping plates 93 is much greater than the thickness of the metal sheet. The moving ends of the two second cylinders 92 extend, driving the corresponding hollow clamping plates 93 to move towards each other in the horizontal direction, using the clamping force of the hollow clamping plates 93 to clamp the two metal sheets. The top side of the base 1 is provided with one of the clamping mechanisms 9. The connected sheet metal thickness detection mechanism 10 includes an air pump 101 fixedly mounted on the top of the base 1. A first air pipe 102 is fixedly mounted at the output end of the air pump 101. A three-way pipe 103 is fixedly mounted at the end of the first air pipe 102 away from the air pump 101. A first switch valve 104 is fixedly mounted on the wall of one air outlet end of the three-way pipe 103. A first flexible hose 105 is fixedly mounted on the wall of the first flexible hose 105. A first air pressure sensor 106 is fixedly mounted on the wall of the first flexible hose 105 away from the three-way pipe 103. The base 1 is fixedly connected to the top of one of the hollow clamping plates 93, and the side of one of the hollow clamping plates 93 has a plurality of evenly distributed air blowing holes 107; the other side of the top of the base 1 is provided with a dust collection mechanism 11 connected to another clamping mechanism 9. The dust collection mechanism 11 includes a suction pump 111 fixedly installed on the top of the base 1. The suction end of the suction pump 111 is fixedly provided with a suction pipe 112. The pipe wall of the suction pipe 112 is fixedly provided with a third flexible hose 113. The end of the third flexible hose 113 away from the suction pipe 112 is fixedly connected to the top of the other hollow clamping plate 93, and the other hollow clamping plate Multiple evenly distributed dust suction holes 114 are provided on the side of the 93. A filter 115 and a fourth switch valve 116 are fixedly installed on the wall of the third hose 113. The end of the suction pipe 112 away from the suction pump 111 is fixedly connected to the wall of the air guide pipe 125. The part of the third hose 113 where the filter 115 and the fourth switch valve 116 are installed is a rigid pipe, and the end of the third hose 113 that connects to the hollow clamp 93 is a flexible pipe. This ensures both the installation strength of the filter 115 and the fourth switch valve 116 and that the hollow clamp 93 is not obstructed by the third hose 113 when it moves.

[0023] A gap width detection mechanism 12 is disposed between one side of the mounting plate 4 and the inside of the welding groove 7. The air inlet of the gap width detection mechanism 12 is connected to the plate thickness detection mechanism 10, and the dust collection mechanism 11 is connected to the air outlet of the gap width detection mechanism 12. The gap width detection mechanism 12 includes a second flexible hose 121 fixedly disposed on the other air outlet end of the three-way pipe 103. A second blowing pipe 122 is obliquely fixedly disposed at the end of the second flexible hose 121 away from the three-way pipe 103. A fixing rod 123 is fixedly disposed on the side wall of the mounting plate 4. The second blowing pipe 122 is fixedly disposed at the lower end of the fixing rod 123. A second switch valve 124 is fixedly disposed on the wall of the other air outlet end of the three-way pipe 103. An air guide pipe 125 is disposed inside the welding groove 7. The wall of the air guide pipe 125 passes through the inside of the welding table 6 and extends outward. A second air pressure sensor 126 is fixedly disposed on the wall of one end of the air guide pipe 125, and a third switch valve 124 is fixedly disposed on the wall of the other end of the air guide pipe 125. 27. An elastic telescopic rod 128 is fixedly provided between the wall of the air guide tube 125 and the side wall of the mounting plate 4. The elastic telescopic rod 128 includes an outer rod 131 fixedly connected to the air guide tube 125. An L-shaped inner rod 132 is slidably provided inside the upper end of the outer rod 131. A spring 133 is fixedly provided between one end of the L-shaped inner rod 132 and the inner wall of the outer rod 131, and the other end of the L-shaped inner rod 132 is fixedly connected to the side wall of the mounting plate 4. When the mounting plate 4 moves up and down, it drives the L-shaped inner rod. 132 slides inside the outer rod 131 and stretches or compresses the spring 133, thereby ensuring that the air guide pipe 125 moves synchronously when the mounting plate 4 moves longitudinally; the wall of the air guide pipe 125 is fixedly provided with a limiting plate 129, and the inside of the welding table 6 is fixedly provided with a limiting rod 130. The limiting plate 129 and the limiting rod 130 are slidably connected. When the air guide pipe 125 moves longitudinally, it can drive the limiting plate 129 to slide on the limiting rod 130, thereby improving the stability of the longitudinal movement of the air guide pipe 125.

[0024] The controller 13 is fixedly installed at one corner of the top of the base 1. The first cylinder 3, the laser welding head 5, the moving mechanism 8, the clamping mechanism 9, the plate thickness detection mechanism 10, the dust collection mechanism 11, and the gap width detection mechanism 12 are all electrically connected to the controller 13.

[0025] The operating principle of this invention is described as follows: First, the operator takes two metal sheets to be welded and places them stably on the upper surface of the welding table 6. The operator manually adjusts the relative position of the two sheets so that the weld seam formed at the joint is precisely aligned with the welding groove 7 on the surface of the welding table 6. Then, the operator issues a clamping command through the controller 13, and simultaneously starts the second cylinders 92 on both sides. The moving ends of the two second cylinders 92 extend smoothly, driving the corresponding hollow clamping plates 93 to move towards each other in the horizontal direction. The clamping force of the hollow clamping plates 93 on both sides is used to firmly fix the two metal sheets, ensuring the stability of the joint gap of the sheets and avoiding the displacement of the sheets due to vibration during the welding process. After clamping and installation, the welding system enters the pre-treatment and testing stage: The operator starts the air pump 101 via controller 13 and opens the first switch valve 104. The stable airflow generated by the air pump 101 is delivered to the first flexible hose 105 via the first air pipe 102, and finally enters the hollow clamp 93 on one side. The airflow is then blown outwards through multiple evenly distributed air holes 107 pre-set on the side of the hollow clamp 93. Because the side of the hollow clamp 93 is tightly fitted to the side wall of the metal sheet, some air holes 107 are partially blocked by the sheet. The greater the sheet thickness, the more air holes 107 are blocked, and the degree of blockage increases. The more thorough the process, the greater the resistance to airflow. At this time, the first air pressure sensor 106 installed on the first hose 105 captures the changes in air pressure inside the hose in real time. The thickness of the sheet is positively correlated with the air pressure value: the thicker the sheet, the higher the pressure value detected by the air pressure sensor. The first air pressure sensor 106 transmits the collected real-time pressure signal to the controller 13. The controller 13 accurately determines the actual thickness of the metal sheet according to the preset "pressure-thickness" calibration relationship, thereby clarifying the basic thickness parameters of the weld area, providing the core basis for setting the starting power of the laser welding head 5, and ensuring that the initial welding parameters match the material properties. After the thickness of the metal sheet is detected, the welding head enters the station calibration process: the operator starts the first cylinder 3 through the controller 13, the moving end of the first cylinder 3 extends vertically, and drives the laser welding head 5 to move down to the preset height directly above the weld (to ensure that the laser focus is accurately focused on the weld surface). At the same time, the controller 13 starts the electric slider 82, which moves smoothly on the electric slide rail 81, and drives the laser welding head 5 to move to one side edge of the metal sheet weld, completing the station alignment before welding. After preparation, the system enters the dynamic detection stage of weld width: Controller 13 controls the electric slider 82 to move in segments along the longitudinal direction of the weld, pausing at each preset detection point. At this time, the first switch valve 104 is closed, and the second switch valve 124 and the third switch valve 127 are opened simultaneously. The airflow generated by the air pump 101 is switched to the second hose 121 and the second air blowing pipe 122. Since the air outlet of the second air blowing pipe 122 is precisely aligned with the weld position, the airflow blows vertically towards the weld area. Some of the airflow will pass through the weld gap into the lower air guide pipe 125 and be guided along the air guide pipe 125 to the side of the welding table 6. The second air pressure sensor 126 on the wall of the air pipe 125 indirectly determines the width of the weld by detecting the pressure change of the airflow through the weld. The wider the weld, the smaller the airflow resistance and the lower the detected pressure value. The narrower the weld, the higher the pressure value. The second air pressure sensor 126 feeds back the detection data to the controller 13 in real time. The controller 13 dynamically adjusts the power parameters of the laser welding head 5 according to the pressure value to ensure that each section of the weld can obtain the appropriate welding energy. After the parameters of the current detection point are calibrated, the electric slider 82 continues to move to the next detection point and repeats the above detection process until the segment detection and power preset of the entire weld are completed. After all weld inspection and parameter calibration are completed, the system enters the formal welding stage: the controller 13 simultaneously starts the electric slider 82, the laser welding head 5, the air pump 101 and the vacuum pump 111, and simultaneously opens the first switch valve 104 and the fourth switch valve 116, and closes the second switch valve 124 and the third switch valve 127. The electric slider 82 moves at a constant speed along the longitudinal direction of the weld, driving the laser welding head 5 to accurately weld along the weld path. At the same time, the airflow generated by the air pump 101 is introduced into the hollow clamp plate 93 on one side through the first air pipe 102 and the first flexible hose 105, and blown directionally onto the weld surface through multiple air holes 107. This not only quickly removes the high temperature heat generated by welding, but also blows the welding slag and welding dust around the weld to the other side, avoiding the adhesion of impurities that affect the welding quality. On the other side, the suction pump 111 operates synchronously, generating negative pressure suction through multiple dust suction holes 114 on the hollow clamping plate 93. This suction draws the blown welding slag, dust, and some heat into the clamping plate, which is then transported through the third hose 113 to the filter 115 for efficient filtration. The filtered clean gas is then discharged outward through the suction pump 111. In addition, the suction pipe 112 is connected to the air guide pipe 125, which creates a stable negative pressure inside the air guide pipe 125. This allows for the rapid removal of residual heat below the weld, further optimizing the weld cooling effect, reducing thermal deformation, and improving the strength and forming quality of the weld. Once a section of the weld is completed, the controller 13 automatically switches to the next preset welding area and repeats the above process of "segmented detection - dynamic parameter adjustment - precise welding - synchronous slag removal" until the entire weld is completely welded. The system then automatically stops all equipment and completes a full welding operation.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal sheet laser welding device, comprising a base (1), an L-shaped bracket (2) fixedly mounted on the top of the base (1), a first cylinder (3) mounted on the top of the L-shaped bracket (2), a mounting plate (4) fixedly mounted on the moving end of the first cylinder (3), and a laser welding head (5) fixedly mounted on the lower surface of the mounting plate (4), characterized in that, Also includes: The welding table (6) is fixedly set on the top of the base (1), and the welding table (6) is located below the laser welding head (5). A welding groove (7) is longitudinally opened in the middle of the upper surface of the welding table (6). The moving mechanism (8) is located on the top of the L-shaped bracket (2), and the first cylinder (3) is connected to the moving mechanism (8); Two clamping mechanisms (9) are respectively set on both sides of the upper surface of the welding table (6). The top side of the base (1) is provided with a plate thickness detection mechanism (10) connected to one of the clamping mechanisms (9), and the other side of the top of the base (1) is provided with a dust collection mechanism (11) connected to the other clamping mechanism (9). A gap width detection mechanism (12) is disposed between one side of the mounting plate (4) and the inside of the welding groove (7), and the air inlet of the gap width detection mechanism (12) is connected to the plate thickness detection mechanism (10), and the dust collection mechanism (11) is connected to the air outlet of the gap width detection mechanism (12). The controller (13) is fixedly installed at one corner of the top of the base (1). The first cylinder (3), laser welding head (5), moving mechanism (8), clamping mechanism (9), plate thickness detection mechanism (10), dust collection mechanism (11) and gap width detection mechanism (12) are all electrically connected to the controller (13).

2. The metal sheet laser welding equipment according to claim 1, characterized in that, The moving mechanism (8) includes an electric slide rail (81) that is fixedly mounted longitudinally on the top of the L-shaped bracket (2). An electric slider (82) is provided inside the electric slide rail (81). The first cylinder (3) is fixedly mounted on the bottom of the electric slider (82).

3. The metal sheet laser welding equipment according to claim 1, characterized in that, The clamping mechanism (9) includes a fixed seat (91) fixedly disposed on the upper surface of the welding table (6), and a second cylinder (92) is fixedly disposed inside the fixed seat (91), and a hollow clamping plate (93) is fixedly disposed at the moving end of the second cylinder (92).

4. The metal sheet laser welding equipment according to claim 3, characterized in that, The plate thickness detection mechanism (10) includes an air pump (101) fixedly installed on the top of the base (1). The output end of the air pump (101) is fixedly provided with a first air pipe (102). The end of the first air pipe (102) away from the air pump (101) is fixedly provided with a three-way pipe (103). The wall of one air outlet end of the three-way pipe (103) is fixedly provided with a first switch valve (104). The air outlet end of the three-way pipe (103) is fixedly provided with a first flexible hose (105). The wall of the first flexible hose (105) is fixedly provided with a first air pressure sensor (106). The end of the first flexible hose (105) away from the three-way pipe (103) is fixedly connected to the top of one of the hollow clamps (93). The side of one of the hollow clamps (93) is provided with a plurality of evenly distributed air holes (107).

5. The metal sheet laser welding equipment according to claim 4, characterized in that, The gap width detection mechanism (12) includes a second flexible hose (121) fixedly installed on the other air outlet end of the three-way pipe (103). A second air blowing pipe (122) is obliquely fixed at the end of the second flexible hose (121) away from the three-way pipe (103). A fixing rod (123) is fixedly installed on the side wall of the mounting plate (4). The second air blowing pipe (122) is fixedly installed at the lower end of the fixing rod (123). The other air outlet end of the three-way pipe (103) is fixedly equipped with... There is a second switch valve (124), and the inside of the welding groove (7) is provided with a gas guide pipe (125). The pipe wall of the gas guide pipe (125) passes through the inside of the welding table (6) and extends outward. A second air pressure sensor (126) is fixedly provided on the pipe wall of one end of the gas guide pipe (125), and a third switch valve (127) is fixedly provided on the pipe wall of the other end of the gas guide pipe (125). An elastic telescopic rod (128) is fixedly provided between the pipe wall of the gas guide pipe (125) and the side wall of the mounting plate (4).

6. The metal sheet laser welding equipment according to claim 5, characterized in that, The gas duct (125) is fixedly provided with a limiting plate (129) on its wall, and the welding table (6) is fixedly provided with a limiting rod (130) inside, and the limiting plate (129) and the limiting rod (130) are slidably connected.

7. The metal sheet laser welding equipment according to claim 5, characterized in that, The elastic telescopic rod (128) includes an outer rod (131) fixedly connected to the air guide tube (125). An L-shaped inner rod (132) is slidably provided inside the upper end of the outer rod (131). A spring (133) is fixedly provided between one end of the L-shaped inner rod (132) and the inner wall of the outer rod (131), and the other end of the L-shaped inner rod (132) is fixedly connected to the side wall of the mounting plate (4).

8. The metal sheet laser welding equipment according to claim 5, characterized in that, The dust collection mechanism (11) includes a suction pump (111) fixedly installed on the top of the base (1). The suction end of the suction pump (111) is fixedly provided with a suction pipe (112). The pipe wall of the suction pipe (112) is fixedly provided with a third hose (113). One end of the third hose (113) away from the suction pipe (112) is fixedly connected to the top of another hollow clamp (93). The other hollow clamp (93) has a plurality of evenly distributed dust collection holes (114) on its side. The pipe wall of the third hose (113) is fixedly provided with a filter (115) and a fourth switch valve (116). One end of the suction pipe (112) away from the suction pump (111) is fixedly connected to the pipe wall of the air guide pipe (125).

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