A metal plate laser welding apparatus

Abstract

The application provides a metal plate laser welding device, and belongs to the technical field of laser welding.The device comprises a bottom plate, a first driving assembly, clamping assemblies, a sliding rod, a supporting assembly, a second driving assembly, a laser welding gun, an elastic assembly and a third driving assembly.The two clamping assemblies are movably arranged on the upper portion of the bottom plate and are used for clamping two groups of metal plates to be welded respectively.The first driving assembly is installed on the upper portion of the bottom plate and is used for driving the two clamping assemblies to move towards each other.A first support plate is fixedly arranged on the upper portion of the bottom plate, and the supporting assembly is arranged on the bottom portion of the first support plate.Compared with the prior art, when the welding surfaces of the two groups of metal plates to be welded are curved surface structures, the movement path of the laser welding gun can be adjusted so that the movement path of the laser welding gun is consistent with the curved welding seam, thereby realizing the automatic welding of the two groups of metal plates with the curved surface welding surfaces.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser welding, and specifically relates to a metal plate laser welding device. BACKGROUND

[0002] At present, in metal plate welding, laser welding can form a high-quality joint and has little effect on the metal plate, which can effectively reduce the probability of metal deformation and improve the welding quality.

[0003] In the prior art, when two groups of metal plates are welded into one, a clamping mechanism is needed to clamp the two groups of metal plates, so that the two groups of metal plates are relatively distributed to form a welding gap, and then a driving mechanism is used to drive a laser welding gun to move along the welding gap to weld the two groups of metal plates into one. However, in the actual welding process, the welding surface of the metal plate is not always a planar structure, and sometimes the welding surface of the metal plate is a curved surface structure. When the welding surface of the metal plate to be welded is a curved surface structure, the welding gap formed by the two groups of metal plates corresponds to a curved structure. Therefore, when the driving mechanism drives the laser welding gun to move straightly, the laser welding gun obviously cannot effectively weld the curved welding seam. SUMMARY

[0004] In view of the above problems of the prior art, the technical problem to be solved by the embodiments of the present application is to provide a metal plate laser welding device.

[0005] To solve the above technical problems, the present application provides the following technical scheme:

[0006] A metal plate laser welding device, comprising a bottom plate, a first driving assembly, a clamping assembly, a slide rod, a supporting assembly, a second driving assembly, a laser welding gun, an elastic assembly and a third driving assembly,

[0007] The clamping assembly is provided with two groups, and the two groups of clamping assemblies are movably arranged on the upper portion of the bottom plate and are used for clamping two groups of metal plates to be welded,

[0008] The first driving assembly is installed on the upper portion of the bottom plate and is used for driving the two groups of clamping assemblies to move towards each other,

[0009] A first support plate is fixedly arranged on the upper portion of the bottom plate, the supporting assembly is arranged at the bottom of the first support plate, the slide rod is provided with a plurality of groups, the plurality of slide rods are sequentially distributed along the length direction of the supporting assembly, and the plurality of slide rods can slide along the width direction of the supporting assembly,

[0010] The second driving assembly is installed at the bottom of the first support plate and is used for driving the supporting assembly to move upwards,

[0011] One end of the elastic assembly is opposite to the slide rod, the laser welding gun is arranged at the lower part of the elastic assembly, and the third driving assembly is installed on the side wall of the first support plate and used for driving the laser welding gun and the elastic assembly to move along the welding seam between the two groups of metal plates.

[0012] As a further improved scheme of the present application, the clamping assembly comprises a support plate, a pressing plate, a second support plate, a screw rod and a hand wheel,

[0013] The second support plate is fixedly arranged at the upper edge of the support plate, the screw rod vertically penetrates the second support plate and is threadedly connected with the second support plate, the pressing plate is fixedly arranged at the bottom of the screw rod, and the hand wheel is fixedly arranged at the upper part of the screw rod.

[0014] As a further improved scheme of the present application, the upper part of the bottom plate is fixedly provided with a support,

[0015] The first driving assembly comprises a motor, a rotating shaft and a first sliding block,

[0016] The motor is fixedly installed on one side of the support, the first sliding block is provided in two groups, the two groups of first sliding blocks are fixedly arranged on the side walls of the support plates corresponding to the two groups of clamping assemblies respectively, the rotating shaft is externally provided with two groups of external threads with opposite rotation directions, one end of the rotating shaft is connected with the output end of the motor, and the other end penetrates the two groups of first sliding blocks and is threadedly connected with the two groups of first sliding blocks through the two groups of external threads.

[0017] As a further improved scheme of the present application, the support assembly comprises a frame and a guide rod, the guide rod is provided in a plurality of groups in the same number as the slide rods, the guide rods are fixedly arranged in the frame, and each group of guide rods penetrates one group of slide rods and movably connects with the slide rods,

[0018] The second driving assembly is a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the side wall of the first support plate, and the output end of the hydraulic cylinder is connected with the frame.

[0019] As a further improved scheme of the present application, the elastic assembly comprises a cylinder, a sleeve, a second sliding block, an elastic rod, a U-shaped support and a roller,

[0020] The cylinder is fixedly arranged on one side of the second sliding block, the sleeve is arranged on the other side of the second sliding block, the piston rod of the cylinder passes through the second sliding block and is connected with the sleeve, one end of the telescopic rod extends into the sleeve and is telescopically connected with the sleeve, the other end of the telescopic rod extends to the outside of the sleeve and is connected with the U-shaped support, the roller is rotatably arranged in the inside of the U-shaped support, the inside of the sleeve is provided with a spring for providing elastic support for the telescopic rod, and the upper portion of the laser welding gun is fixedly connected with the telescopic rod through the welding gun support,

[0021] The third driving assembly comprises an external motor and a lead screw,

[0022] The external motor is fixedly installed on the side wall of the first support plate, one end of the lead screw is connected with the output end of the external motor, and the other end of the lead screw penetrates through the second sliding block and is threadedly connected with the second sliding block.

[0023] As a further improvement of the present application: a rotating sleeve is rotatably arranged on the side wall of each slide rod, a caulking block is fixedly arranged on the rotating sleeve, the caulking block has an isosceles triangular structure, arc-shaped notches are formed in the two waist surfaces of the isosceles triangle, and one of the arc-shaped notches is wrapped on the outer wall of the rotating sleeve and is fixedly connected with the rotating sleeve.

[0024] As a further improvement of the present application: a top block is further fixedly arranged on the side wall of the first support plate.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] Compared with the prior art, when the welding surfaces of the two groups of metal plates to be welded are curved surface structures, the movement path of the laser welding gun can be adjusted, so that the movement path of the laser welding gun is consistent with the curved weld, thereby realizing automatic welding of the two groups of metal plates with curved surface welding surfaces. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural diagram of a metal plate laser welding equipment Figure 1 ;

[0028] Figure 2 It is a structural diagram of a metal plate laser welding equipment Figure 2 ;

[0029] Figure 3 It is a structural diagram of a slide rod in a metal plate laser welding equipment

[0030] Figure 4 It is Figure 1 an enlarged schematic view of region A in the figure

[0031] Figure 5For Figure 2 Amplified schematic view of the middle B area;

[0032] In the figure: 10 - base plate, 101 - support, 102 - first support plate, 103 - top block, 20 - first driving assembly, 201 - motor, 202 - rotating shaft, 203 - first sliding block, 204 - external thread, 30 - clamping assembly, 301 - support plate, 302 - clamping plate, 303 - second support plate, 304 - screw rod, 305 - hand wheel, 40 - sliding rod, 401 - rotating sleeve, 402 - caulking block, 50 - supporting assembly, 501 - frame, 502 - guide rod, 60 - second driving assembly, 70 - laser welding gun, 701 - welding gun support, 80 - elastic assembly, 801 - air cylinder, 802 - sleeve, 803 - second sliding block, 804 - telescopic rod, 805 - U-shaped support, 806 - roller, 90 - third driving assembly. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0034] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0035] Please refer to Figure 1 and Figure 2The embodiment provides a metal plate laser welding device, which comprises a bottom plate 10, a first driving assembly 20, clamping assemblies 30, slide rods 40, a supporting assembly 50, a second driving assembly 60, a laser welding gun 70, an elastic assembly 80 and a third driving assembly 90. The clamping assemblies 30 are provided in two groups and movably arranged on the upper portion of the bottom plate 10, and used for clamping two groups of metal plates to be welded respectively. The first driving assembly 20 is installed on the upper portion of the bottom plate 10 and used for driving the two groups of clamping assemblies 30 to move towards each other. A first support plate 102 is fixedly arranged on the upper portion of the bottom plate 10. The supporting assembly 50 is arranged on the bottom portion of the first support plate 102. The slide rods 40 are provided in several groups and sequentially distributed along the length direction of the supporting assembly 50. The slide rods 40 can slide along the width direction of the supporting assembly 50. The second driving assembly 60 is installed on the bottom portion of the first support plate 102 and used for driving the supporting assembly 50 to move upwards. One end of the elastic assembly 80 is in abutment with the slide rod 40. The laser welding gun 70 is arranged on the lower portion of the elastic assembly 80. The third driving assembly 90 is installed on the side wall of the first support plate 102 and used for driving the laser welding gun 70 and the elastic assembly 80 to move along the weld joint between the two groups of metal plates.

[0036] When it is necessary to weld two groups of metal plates into one, two groups of metal plates can be clamped by two groups of clamping assemblies 30 respectively, then the first driving assembly 20 drives the two groups of clamping assemblies 30 to move towards each other, thereby driving the two groups of metal plates to move towards each other, if the welding surface between the two groups of metal plates is a straight line structure, when the two groups of metal plates move towards each other, the welding surface of the two groups of metal plates acts on the opposite sides of the plurality of slide rods 40, thereby clamping the plurality of slide rods 40, at this time the plurality of slide rods 40 remain in a straight line, then the second driving assembly 60 drives the support assembly 50 to move upwards, thereby driving the plurality of slide rods 40 to move upwards, the lower end of the plurality of slide rods 40 is removed from between the two groups of metal plates, then the third driving assembly 90 drives the laser welding gun 70 and the elastic assembly 80 to move along the welding gap of the metal plate, in this process, through the abutting action between the elastic assembly 80 and the slide rod 40, the elastic assembly 80 can drive the laser welding gun 70 to move along the straight welding gap of the metal plate, thereby welding the metal plate with a straight line structure; conversely, if the welding surface between the two groups of metal plates is a curved surface structure, when the two groups of metal plates move towards each other, the welding surface of the two groups of metal plates acts on the opposite sides of the plurality of slide rods 40, thereby pushing the plurality of slide rods 40 to slide in the width direction of the support assembly 50, when the welding surface of the two groups of metal plates clamps the plurality of slide rods 40, the connecting line of the plurality of slide rods 40 at this time remains curved, and the curved shape is consistent with the metal plate welding curved surface, then the second driving assembly 60 drives the support assembly 50 to move upwards, thereby driving the plurality of slide rods 40 to move upwards, the lower end of the plurality of slide rods 40 is removed from between the two groups of metal plates, then the third driving assembly 90 drives the laser welding gun 70 and the elastic assembly 80 to move along the welding gap of the metal plate, in this process, through the abutting action between the elastic assembly 80 and the slide rod 40, the elastic assembly 80 adaptively expands and contracts, thereby making the movement path of the laser welding gun 70 consistent with the welding curved surface of the metal plate, thereby welding the metal plate with a curved surface structure.

[0037] Please refer to Figure 1 In one embodiment, the clamping assembly 30 comprises a support plate 301, a pressing plate 302, a second bracket plate 303, a screw rod 304 and a hand wheel 305, the second bracket plate 303 is fixedly arranged on the upper edge of the support plate 301, the screw rod 304 penetrates the second bracket plate 303 vertically and is threadedly matched with the second bracket plate 303, the pressing plate 302 is fixedly arranged on the bottom of the screw rod 304, and the hand wheel 305 is fixedly arranged on the upper part of the screw rod 304.

[0038] By placing the metal plate to be welded on the upper part of the support plate 301, then rotating the hand wheel 305, in turn driving the screw rod 304 to rotate, through the screw thread cooperation of the screw rod 304 and the second support plate 303, in turn driving the pressing plate 302 to move down, the pressing plate 302 presses the metal plate tightly on the upper part of the support plate 301, realizing the clamping and fixing of the metal plate.

[0039] Please refer to Figure 1 In an embodiment, the upper part of the bottom plate 10 is fixedly provided with a support 101, the first driving assembly 20 includes a motor 201, a rotating shaft 202 and a first sliding block 203, the motor 201 is fixedly installed on one side of the support 101, the first sliding block 203 is provided in two groups, and the two groups of first sliding blocks 203 are fixedly arranged on the side walls of the two groups of support plates 301 corresponding to the clamping assemblies 30 respectively, the rotating shaft 202 is externally provided with two groups of external threads 204 with opposite rotation directions, one end of the rotating shaft 202 is connected with the output end of the motor 201, and the other end penetrates through the two groups of first sliding blocks 203 and is in threaded cooperation with the two groups of first sliding blocks 203 through the two groups of external threads 204 respectively.

[0040] After the pressing plate 302 presses the metal plate tightly on the upper part of the support plate 301, the motor 201 can be used to drive the rotating shaft 202 to rotate, and when the rotating shaft 202 rotates, the two groups of first sliding blocks 203 are driven to slide towards each other along the outside of the rotating shaft 202 through the two groups of external threads 204, the two groups of support plates 301 are driven to move towards each other through the two groups of first sliding blocks 203, in turn driving the two groups of metal plates to move towards each other, and the welding surfaces of the two groups of metal plates act on the plurality of sliding rods 40 when moving towards each other, if the welding surface of the metal plate to be welded is a planar structure, the plurality of sliding rods 40 remain in the same straight line when the welding surfaces of the two groups of metal plates act on the plurality of sliding rods 40, otherwise, if the welding surface of the metal plate to be welded is a curved surface structure, the plurality of sliding rods 40 are driven to adaptively slide compared with the support assembly 50 through the pushing of the metal plate when the welding surfaces of the two groups of metal plates act on the plurality of sliding rods 40, and the connecting line between the plurality of sliding rods 40 remains curved, and the curved shape is consistent with the curved shape of the welding surface.

[0041] Please refer to Figure 1 and Figure 4 In an embodiment, the support assembly 50 includes a frame 501 and a guide rod 502, the guide rod 502 is provided in a plurality of groups with the same number as the sliding rods 40, the plurality of guide rods 502 are fixedly arranged in the frame 501, each group of guide rods 502 penetrates through a group of sliding rods 40 transversely and is in movable cooperation with the sliding rods 40, and the second driving assembly 60 is a hydraulic cylinder which is fixedly installed on the side wall of the first support plate 102 and has an output end connected with the frame 501.

[0042] When the metal plate with curved welding surface acts on the plurality of slide rods 40, the plurality of slide rods 40 can slide relative to the corresponding guide rods 502 under the pushing action of the metal plate. When the welding surface of the metal plate is in full contact with the plurality of slide rods 40, the connecting lines between the plurality of slide rods 40 form a curved structure, and the shape of the curved structure is consistent with the welding curved surface of the metal plate. After the welding surface of the metal plate is in full contact with the plurality of slide rods 40, the frame 501 is driven upward by the hydraulic cylinder, and then the plurality of slide rods 40 are synchronously driven upward by the plurality of guide rods 502. The lower ends of the plurality of slide rods 40 are removed from between the two groups of metal plates.

[0043] Please refer to Figure 1 、 Figure 2 and Figure 5 In one embodiment, the elastic assembly 80 includes a cylinder 801, a sleeve 802, a second sliding block 803, a telescopic rod 804, a U-shaped support 805, and a roller 806. The cylinder 801 is fixedly arranged on one side of the second sliding block 803. The sleeve 802 is arranged on the other side of the second sliding block 803. The piston rod of the cylinder 801 penetrates through the second sliding block 803 and is connected with the sleeve 802. One end of the telescopic rod 804 extends into the sleeve 802 and is telescopically connected with the sleeve 802. The other end of the telescopic rod 804 extends outside the sleeve 802 and is connected with the U-shaped support 805. The roller 806 is rotatably arranged inside the U-shaped support 805. The sleeve 802 is internally provided with a spring (not shown in the figure) for providing elastic support to the telescopic rod 804. The upper part of the laser welding gun 70 is fixedly connected with the telescopic rod 804 through a welding gun support 701. The third driving assembly 90 includes an external motor and a lead screw. The external motor is fixedly installed on the side wall of the first support plate 102. One end of the lead screw is connected with the output end of the external motor, and the other end penetrates through the second sliding block 803 and is threadedly connected with the second sliding block 803.

[0044] When the hydraulic cylinder drives the frame 501 to move upwards and the plurality of slide rods 40 to remove the lower ends from between the two groups of metal plates, the cylinder 801 drives the piston rod to extend, thereby pushing the sleeve 802 to move, and the sleeve 802 drives the telescopic rod 804, the U-shaped bracket 805, the roller 806, the welding gun bracket 701 and the laser welding gun 70 to move. When the roller 806 moves, it acts on the side wall of a slide rod 40, and the spring inside the sleeve 802 is compressed under stress. At this time, the laser welding gun 70 moves to directly below the slide rod 40 and directly opposite the welding gap between the two groups of metal plates. Then, the external motor drives the screw rod to rotate, and the screw rod and the second sliding block 803 are used in cooperation to drive the second sliding block 803 to move along the length direction of the screw rod, thereby driving the cylinder 801, the sleeve 802, the telescopic rod 804, the roller 806, the welding gun bracket 701 and the welding gun 70 to move as a whole. When the roller 806 moves, it rolls along the side wall of the plurality of slide rods 40. At this time, if the welding surfaces of the two groups of metal plates are planar structures, the welding gap formed by the two groups of metal plates is a straight line structure, and the plurality of slide rods 40 form a straight line structure. When the roller 806 rolls along the side wall of the plurality of slide rods 40, the laser welding gun 70 moves straight along the welding gap formed by the two groups of metal plates, so as to weld the two groups of metal plates with planar welding surfaces into one body. Conversely, if the welding surfaces of the two groups of metal plates are curved surface structures, the welding gap formed by the two groups of metal plates is a curved line structure, and the connecting line between the plurality of slide rods 40 forms a curved line structure. When the roller 806 rolls along the side wall of the plurality of slide rods 40, in cooperation with the elastic support of the spring to the telescopic rod 804, the telescopic rod 804 can be adapted to the sleeve 802 to extend and retract, thereby adaptively adjusting the movement path of the laser welding gun 70, so that the laser welding gun 70 moves along the welding gap formed by the two groups of metal plates in a curved line, thereby welding the two groups of metal plates with curved surface welding surfaces into one body.

[0045] Please refer to Figure 3 In one embodiment, a rotating sleeve 401 is rotatably sleeved on the side wall of each group of slide rods 40, and a caulking block 402 is fixedly arranged on the rotating sleeve 401. The caulking block 402 is in an isosceles triangular structure, and arc-shaped notches are formed in the two waist surfaces of the isosceles triangle. One of the arc-shaped notches is wrapped on the outer wall of the rotating sleeve 401 and is fixedly connected with the rotating sleeve 401.

[0046] When the roller 806 rolls along the side wall of a group of slide bars 40, the roller 806 can act on the filler block 402 on the side wall of the group of slide bars 40, the filler block 402 drives the rotating sleeve 401 to rotate relative to the slide bar 40, and the filler block 402 is embedded between the adjacent two groups of slide bars 40, at this time, the arc-shaped notch on one waist surface of the filler block 402 is embedded with the rotating sleeve 401 on the side wall of the adjacent group of slide bars 40, thereby filling the gap between the adjacent two groups of slide bars 40, so that the roller 806 can smoothly transition from the side wall of one group of slide bars 40 to the side wall of the adjacent group of slide bars 40, thereby driving the laser welding gun 70 to move smoothly along the welding gap of the two groups of metal plates, thereby improving the welding effect and welding quality.

[0047] Please refer to Figure 1 In one embodiment, the first support plate 102 is further provided with a top block 103 on the side wall.

[0048] After the hydraulic cylinder drives the frame 501 to move and then takes the lower ends of the slide bars 40 away from the two groups of metal plates, the upper ends of the slide bars 40 act on the top block 103, and the top block 103 tightly presses the slide bars 40, thereby realizing the fixation of the slide bars 40, so that when the roller 806 rolls along the side wall of the slide bars 40, the slide bars 40 can stably support the roller 806, thereby stably supporting the laser welding gun 70, and the two groups of metal plates can be smoothly welded together.

[0049] Compared with the prior art, when the welding surfaces of the two groups of metal plates to be welded are curved surface structures, the moving path of the laser welding gun 70 can be adjusted according to the moving path of the laser welding gun 70, so that the moving path of the laser welding gun 70 is consistent with the curved welding seam, thereby realizing the automatic welding of the two groups of metal plates with curved welding surfaces.

[0050] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A metal sheet laser welding apparatus characterized by comprising: The first driving assembly, the clamping assembly, the slide rod, the supporting assembly, the second driving assembly, the laser welding gun, the elastic assembly and the third driving assembly, The clamping assembly is provided with two groups, and the two groups of clamping assemblies are movably arranged on the upper portion of the bottom plate and are used for clamping two groups of metal plates to be welded respectively, The first driving assembly is installed on the upper portion of the bottom plate and is used for driving the two groups of clamping assemblies to move towards each other, The first support plate is fixedly arranged on the upper portion of the bottom plate, the supporting assembly is arranged on the bottom portion of the first support plate, the slide rod is provided with a plurality of groups, the plurality of slide rods are sequentially distributed along the length direction of the supporting assembly, and the plurality of slide rods can slide along the width direction of the supporting assembly, The second driving assembly is installed on the bottom portion of the first support plate and is used for driving the supporting assembly to move upwards, One end of the elastic assembly abuts against the slide rod, the laser welding gun is arranged on the lower portion of the elastic assembly, the third driving assembly is installed on the side wall of the first support plate and is used for driving the laser welding gun and the elastic assembly to move along the weld joint between the two groups of metal plates, The elastic assembly comprises a cylinder, a sleeve, a second sliding block, a telescopic rod, a U-shaped support and a roller, The cylinder is fixedly arranged on one side of the second sliding block, the sleeve is arranged on the other side of the second sliding block, the piston rod of the cylinder penetrates through the second sliding block and is connected with the sleeve, one end of the telescopic rod extends into the sleeve and is telescopically matched with the sleeve, the other end of the telescopic rod extends to the outside of the sleeve and is connected with the U-shaped support, the roller is rotatably arranged in the inner side of the U-shaped support, the inside of the sleeve is provided with a spring for providing elastic support for the telescopic rod, and the upper portion of the laser welding gun is fixedly connected with the telescopic rod through a welding gun support, The third driving assembly comprises an external motor and a lead screw, The external motor is fixedly installed on the side wall of the first support plate, one end of the lead screw is connected with the output end of the external motor, and the other end of the lead screw penetrates through the second sliding block and is threadedly matched with the second sliding block, The supporting assembly comprises a frame and a guide rod, the guide rod is provided with a plurality of groups and has the same number as the slide rod, the guide rod is fixedly arranged in the frame, and each group of guide rods penetrates through a group of slide rods in the transverse direction and is movably matched with the slide rods, The second driving assembly is a hydraulic cylinder, the hydraulic cylinder is fixedly installed on the side wall of the first support plate, and the output end of the hydraulic cylinder is connected with the frame, A rotating sleeve is rotatably arranged on the side wall of each group of slide rods, a caulking block is fixedly arranged on the rotating sleeve, the caulking block has an isosceles triangle structure, arc-shaped notches are formed in the two base sides of the isosceles triangle, and one of the arc-shaped notches is wrapped on the outer wall of the rotating sleeve and is fixedly connected with the rotating sleeve.

2. The metal sheet laser welding apparatus according to claim 1, wherein The clamping assembly comprises a support plate, a pressing plate, a second support plate, a screw rod and a hand wheel, The second support plate is fixedly arranged on the upper edge of the support plate, the screw rod penetrates through the second support plate in the vertical direction and is threadedly matched with the second support plate, the pressing plate is fixedly arranged on the bottom portion of the screw rod, and the hand wheel is fixedly arranged on the upper portion of the screw rod.

3. The metal sheet laser welding apparatus according to claim 2, wherein The upper portion of the bottom plate is fixedly provided with a support, The first driving assembly comprises a motor, a rotating shaft and a first sliding block, The motor is fixedly installed on one side of the support, the first sliding block is provided with two groups, two groups of the first sliding block are fixedly arranged on the side walls of the supporting plates corresponding to two groups of the clamping assemblies respectively, the rotating shaft is externally provided with two groups of external threads with opposite rotation directions, one end of the rotating shaft is connected with the output end of the motor, and the other end penetrates through two groups of the first sliding blocks and is in threaded connection with two groups of the first sliding blocks through two groups of the external threads respectively.

4. The metal sheet laser welding apparatus according to claim 1, wherein A top block is further fixedly arranged on the side wall of the first support plate.

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