Circuit board laser welding machine

Abstract

The invention discloses a circuit board laser welding machine and belongs to the technical field of laser welding, the circuit board laser welding machine comprises a supporting table and a laser welding assembly mounted on the upper surface of the supporting table, a strip-shaped through groove penetrating to the lower surface of the supporting table is formed in the upper surface of the supporting table, and two strip-shaped sliding grooves parallel to the strip-shaped through groove are further formed in the upper surface of the supporting table; the two strip-shaped sliding grooves are formed in the two sides of the strip-shaped penetrating groove correspondingly, a pulley is connected into each strip-shaped sliding groove in a rolling mode, a supporting piece is fixedly connected to the shaft end of each pulley, and a supporting block is connected to the upper surface of each supporting piece through an elastic mechanism. The position of the mounting block can be adjusted according to the shape of a circuit board, then the circuit boards in different shapes can be effectively positioned through the taper sleeve, in addition, the circuit boards can be stably and effectively clamped in the transverse direction and the longitudinal direction through simple operation, it is guaranteed that the circuit boards are in the horizontal state during welding, and therefore the welding quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding machines, in particular to a circuit board laser welding machine. BACKGROUND

[0002] Circuit boards are the most commonly used electronic products in electronic devices. Circuit boards make circuits miniaturized and intuitive, and play an important role in the batch production of fixed circuits and the optimization of electrical appliance layout. Before use, various electrical components need to be welded on the circuit board. The circuit board laser welding machine is a device for welding electrical components on the circuit board. The shape of the existing circuit board is not only square, but also other shapes, such as trapezoidal or circular. Whether it is a square, trapezoidal or circular circuit board, mounting holes are provided on it. The mounting holes on the square and trapezoidal circuit boards are generally provided on the body, while the mounting holes on the circular circuit board are generally provided on the protrusions connected to the edge of the body. The existing circuit board laser welding machine has the following technical problems when in use, such as: Publication No. CN216177574U discloses an electrical component and circuit board laser welding device. The two fixed plates are close to each other by mutual repulsion of the magnetic block and electromagnet, thereby clamping the circuit board. However, it cannot limit the position of the circuit board in front and back during use. In addition, in the prior art, the circuit board is only clamped in the transverse direction, which makes the longitudinal direction of the circuit board not limited during clamping, so that the circuit board is not necessarily in a horizontal state after being clamped, thereby causing the welding position to deviate during automatic welding, which is not conducive to ensuring the welding quality. Therefore, a circuit board laser welding machine is needed to solve the above problems. SUMMARY

[0003] The present application aims to provide a circuit board laser welding machine to solve the problem that the existing circuit board laser welding machine cannot stably clamp and fix different shapes of circuit boards in left and right positions and front and back positions, and is not convenient for effectively clamping different shapes of circuit boards.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The utility model provides a circuit board laser welding machine, including support platform and the laser welding assembly of installation on its upper surface, the upper surface of support platform is provided with the strip through groove through to its lower surface, and the upper surface of support platform is also provided with two strip sliding grooves parallel with strip through groove, two strip sliding grooves are arranged respectively in the both sides of strip through groove, and the axle end of pulley is fixedly connected with the support piece in each strip sliding groove, and the upper surface of support piece is connected with the support block through the elastic mechanism, and the positioning adjustment mechanism is installed between two support blocks, the middle part of positioning adjustment mechanism is fixedly connected with the limiting mechanism, and the lower pressing mechanism is arranged on the limiting mechanism.

[0005] Preferably, the elastic mechanism includes a rod tube telescopic assembly one and a rod tube telescopic assembly two connected between the support piece and the corresponding support block, and a spring three is further arranged outside the rod tube telescopic assembly two.

[0006] Preferably, the rod tube telescopic assembly one and the rod tube telescopic assembly two are both composed of a rod structure and a tube structure, and the relative positions of the rod structure and the tube structure on the rod tube telescopic assembly one and the rod tube telescopic assembly two are opposite, two groups of rod tube telescopic assembly one are arranged on each support piece, and the two groups of rod tube telescopic assembly one are symmetrically arranged about the axis of the corresponding rod tube telescopic assembly two.

[0007] Preferably, the positioning adjustment mechanism includes a lead screw penetrating through the support block, and the two lead screws are arranged in parallel with each other and perpendicular to the strip through groove, two shaft sleeves are symmetrically and threadedly connected on each lead screw, an installation block is connected to the outside bearing of the shaft sleeve, the thread directions of the two threads arranged on each lead screw are opposite, so that when the lead screw rotates, the two shaft sleeves on the lead screw move in opposite directions, a limiting shaft penetrates through the shaft sleeve, and the limiting shaft is fixedly connected to the corresponding support block.

[0008] Preferably, the positioning adjustment mechanism further includes a strip through groove penetrating through the installation block, and a limiting plate is connected to the strip through groove, a pad block is connected to the lower end shaft of the limiting plate, and the pad block is arranged below the installation block, and an elastic pressing wheel is arranged on the lower surface of the installation block.

[0009] Preferably, the positioning adjustment mechanism further includes an installation plate fixedly connected to the side surface of the pad block, a limiting rod perpendicular to the installation plate is fixedly connected to the installation plate, a taper sleeve is arranged on the upper end of the limiting rod, and a spring two is arranged outside the limiting rod between the lower end of the taper sleeve and the upper surface of the installation plate.

[0010] Preferably, the limiting mechanism comprises two supporting blocks fixedly connected to the lower surface of the supporting table, and a prismatic supporting rod movably penetrating through the two supporting blocks, the rear end of the supporting rod is connected to two connecting rods, and one end of each connecting rod is sleeved with a connecting pipe, the other end of the connecting pipe is connected to a shaft column, and the shaft column is fixedly connected to the lower surface of the supporting table, a spring is arranged between the one end of the connecting pipe sleeved with the connecting rod and the one end of the connecting rod connected to the supporting rod, the front end of the supporting rod is coaxially connected to a push-pull rod, and the push-pull rod movably penetrates through the protrusion arranged at the front end of the lower surface of the supporting table.

[0011] Preferably, the limiting mechanism further comprises a supporting seat connected to the middle part of the lead screw through a bearing, and the lower end of the supporting seat movably penetrates through the strip-shaped through slot, the lower end of the supporting seat is provided with a connecting block coaxial therewith, and the connecting block is provided with an inclined slot, and the lower surface of the middle part of the supporting rod is provided with a pushing rod perpendicular thereto, and the two ends of the pushing rod movably penetrate through the two inclined slots, respectively.

[0012] Preferably, the pressing mechanism comprises a sleeve arranged on both sides of the upper end of the supporting seat, the sleeve is connected to the supporting seat through a bearing, and the sleeve is coaxially sleeved on the outer side of the corresponding lead screw, the two coaxial sleeves are connected through an n-shaped shifting frame and an n-shaped driving frame, the driving frame is connected to a driving wheel through a bearing, the width of the driving frame is the same as the width of the shifting frame, and the length of the driving frame is greater than the length of the shifting frame.

[0013] Preferably, the pressing mechanism further comprises an arc-shaped through slot penetrating through both sides of the supporting seat, the supporting block is provided with an arc-shaped sliding slot corresponding to the arc-shaped through slot on the side facing the corresponding supporting seat, an interlocking rod movably penetrates through the arc-shaped through slot, and the two ends of the interlocking rod are slidably connected to the corresponding arc-shaped sliding slots, respectively, and the interlocking rod further movably penetrates through the mounting block.

[0014] Compared with the prior art, the circuit board laser welding machine has the following beneficial effects: the position of the mounting block can be adjusted according to the shape of the circuit board, and the cone sleeve can effectively position the circuit board of different shapes, and through simple operation, the circuit board can be stably and effectively clamped from the horizontal and vertical directions, so that the circuit board is in a horizontal state during welding, thereby improving the welding quality: 1. By rotating the lead screw, the two mounting blocks on the lead screw can move closer to each other or farther away from each other, thereby adjusting the position of the cone sleeve, so that the circuit board of different shapes can be fixedly connected to the pad through the mounting hole; 2. The support rod can be moved by pushing the push-pull rod. The position of the support rod can be limited to a certain extent by the connecting rod, connecting tube, spring 1 and shaft column. At the same time, when the support rod moves, it drives the pushing rod to move synchronously. Then, the connecting block drives the support seat to move downward through the inclined slot. The downward movement of the support seat drives the mounting block to move downward synchronously. After that, the pad connected to the mounting block first contacts the upper surface of the support platform. After that, the mounting block continues to move downward, which causes the mounting block and the pad to move relative to each other until the elastic pressure wheel contacts the circuit board. At this time, the elastic pressure wheel and the pad will contact the upper and lower surfaces of the circuit board respectively, thereby performing a preliminary clamping of the circuit board. 3. In addition, when the sleeve moves downward synchronously with the support block, the driving wheel will contact the upper surface of the support platform. After that, the support block continues to move downward, which will cause the driving wheel to roll and drive the driving frame to move. At this time, the sleeve will be driven to rotate, which can make the toggle frame rotate synchronously. When the toggle frame rotates, it will squeeze the linkage rod, which can prompt the mounting block to rotate only toward the pad, avoiding the problem that the mounting block rotates in the opposite direction and the elastic pressure wheel cannot effectively squeeze the circuit board in the vertical direction, thereby ensuring that the circuit board can be stably and effectively clamped in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the supporting platform structure when viewed from above; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of point A; Figure 4 This is a schematic diagram of the top view of the support platform of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the support platform of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of point B; Figure 7 This is a schematic diagram of the connection structure between the push-pull rod and the connecting block of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of point C in the middle; Figure 9 This is a schematic diagram of the connection structure of the connecting block and the limiting plate of the present invention; Figure 10 For the present invention Figure 9 The enlarged structural diagram of point D in the middle; Figure 11 It is a schematic diagram of the connection structure between the limiting shaft and the support block of the present invention.

[0016] In the figure: 1, support table; 2, laser welding assembly; 3, strip-shaped through groove; 4, strip-shaped sliding groove; 5, push-pull rod; 6, connecting block; 7, push rod; 8, support rod; 9, supporting block; 10, connecting rod; 11, connecting pipe; 12, spring I; 13, shaft column; 14, supporting block; 15, screw rod; 16, support seat; 17, linkage rod; 18, mounting block; 19, shaft sleeve; 20, limiting plate; 21, cushion block; 22, elastic pressure wheel; 23, mounting plate; 24, limiting rod; 25, taper sleeve; 26, spring II; 27, inclined groove; 28, pulley; 29, support piece; 30, sleeve; 31, push frame; 32, drive frame; 33, drive wheel; 34, arc-shaped through groove; 35, arc-shaped sliding groove; 36, rod pipe telescopic assembly I; 37, rod pipe telescopic assembly II; 38, spring III; 39, strip-shaped through groove; 40, limiting shaft. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Please refer to Figures 1-11 The present application provides the following technical solutions: Embodiment one: In order to solve the problem that the previous circuit board laser welding machine can only clamp the circuit board in the left-right direction and cannot clamp the circuit board in the front-back direction, thereby easily leading to the position deviation of the circuit board in the welding process, the present application provides the following technical solutions, specifically, a circuit board laser welding machine, comprising a support table 1 and a laser welding assembly 2 mounted on the upper surface thereof, the upper surface of the support table 1 is provided with a strip-shaped through groove 3 penetrating to the lower surface thereof, and the upper surface of the support table 1 is further provided with two strip-shaped sliding grooves 4 parallel to the strip-shaped through groove 3, the two strip-shaped sliding grooves 4 are respectively arranged on the two sides of the strip-shaped through groove 3, a pulley 28 is rollingly connected in each strip-shaped sliding groove 4, and the shaft end of the pulley 28 is fixedly connected with a support piece 29, the upper surface of the support piece 29 is connected with a supporting block 14 through an elastic mechanism, and a positioning adjusting mechanism is mounted between the two supporting blocks 14, and the middle part of the positioning adjusting mechanism is fixedly connected with a limiting mechanism.

[0019] The elastic mechanism comprises a first telescopic rod tube assembly 36 and a second telescopic rod tube assembly 37 connected between the support piece 29 and the corresponding support block 14, and a third spring 38 sleeved outside the second telescopic rod tube assembly 37 is further arranged between the support piece 29 and the corresponding support block 14, the first telescopic rod tube assembly 36 and the second telescopic rod tube assembly 37 are both composed of a rod structure and a tube structure, and the relative positions of the rod structure and the tube structure on the first telescopic rod tube assembly 36 and the second telescopic rod tube assembly 37 are opposite, two groups of the first telescopic rod tube assemblies 36 are arranged on each support piece 29 and symmetrically about the axis of the corresponding second telescopic rod tube assembly 37.

[0020] The positioning adjusting mechanism comprises the lead screws 15 penetrating the support blocks 14, the two lead screws 15 are arranged in parallel with each other and are perpendicular to the strip-shaped penetrating grooves 3 in different planes, two shaft sleeves 19 are symmetrically and threadedly connected on each lead screw 15, bearings are arranged on the outer sides of the shaft sleeves 19, and mounting blocks 18 are connected to the bearings, the two threads arranged on each lead screw 15 are opposite in rotation direction, so that the two shaft sleeves 19 on the lead screw 15 move in opposite directions when the lead screw 15 rotates, a limiting shaft 40 penetrates the shaft sleeve 19, and the limiting shaft 40 is fixedly connected to the corresponding support block 14, the positioning adjusting mechanism further comprises a strip-shaped through groove 39 penetrating the mounting block 18, and a limiting plate 20 is connected to the strip-shaped through groove 39, a pad 21 is connected to the lower end of the limiting plate 20, and the pad 21 is arranged below the mounting block 18, and an elastic pressing wheel 22 is arranged on the lower surface of the mounting block 18.

[0021] According to Figures 2-6 and Figures 9-11 , the lead screw 15 is rotated by a tool (screwdriver), and the shaft sleeve 19 cannot rotate under the action of the limiting shaft 40, so that the shaft sleeve 19 moves on the lead screw 15, and the two shaft sleeves 19 move close to or away from each other, so that the position of the limiting mechanism can be adjusted according to the shape of the circuit board, so as to limit the circuit board of different shapes in the left-right and front-back directions.

[0022] The positioning adjusting mechanism further comprises a mounting plate 23 fixedly connected to the side surface of the cushion block 21, and a limiting rod 24 vertically fixedly connected to the mounting plate 23, wherein the upper end of the limiting rod 24 is sleeved with a taper sleeve 25, and the lower end of the taper sleeve 25 is provided with a spring 26 sleeved outside the limiting rod 24 between the upper surface of the mounting plate 23. The limiting mechanism comprises two supporting blocks 9 fixedly connected to the lower surface of the supporting table 1, and a prismatic supporting rod 8 movably penetrating through the two supporting blocks 9, wherein the rear end of the supporting rod 8 is symmetrically connected with two connecting rods 10, and one end of a connecting pipe 11 is sleeved with each connecting rod 10, the other end of the connecting pipe 11 is connected with a shaft column 13, and the shaft column 13 is fixedly connected to the lower surface of the supporting table 1, the spring 12 is arranged between the end of the connecting pipe 11 sleeved with the connecting rod 10 and the end of the connecting rod 10 connected with the supporting rod 8, the front end of the supporting rod 8 is coaxially connected with the push-pull rod 5, and the push-pull rod 5 movably penetrates through the protrusion provided at the front end of the lower surface of the supporting table 1, the supporting seat 16 connected with the middle part of the lead screw 15 by a bearing, and the supporting seat 16 movably penetrates through the strip-shaped through slot 3, the lower end of the supporting seat 16 is provided with a connecting block 6 coaxial therewith, and the connecting block 6 is provided with an inclined slot 27, the lower surface of the middle part of the supporting rod 8 is provided with a pushing rod 7 perpendicular thereto, and the two ends of the pushing rod 7 are movably arranged in the two inclined slots 27 respectively.

[0023] The mounting hole on the circuit board is aligned with the taper sleeve 25, and the taper sleeve 25 penetrates through the corresponding mounting hole, at this time the circuit board is limited in the left-right direction and the front-rear direction, avoiding the position deviation during welding.

[0024] In order to solve the problem that the circuit board is not in a horizontal state during welding, thereby affecting the welding quality, the following technical scheme is provided, specifically, the limiting mechanism is provided with a pressing mechanism.

[0025] The pressing mechanism comprises sleeve pipes 30 arranged on both sides of the upper end of the supporting seat 16, and the sleeve pipes 30 are connected with the supporting seat 16 by a bearing, and the sleeve pipes 30 are coaxially sleeved outside the corresponding lead screw 15, the two coaxial sleeve pipes 30 are connected through an n-shaped push frame 31 and an n-shaped drive frame 32, the drive frame 32 is connected with a drive wheel 33 by a bearing, the width of the drive frame 32 is the same as the width of the push frame 31, and the length of the drive frame 32 is greater than the length of the push frame 31, the pressing mechanism further comprises an arc-shaped through slot 34 penetrating through both sides of the supporting seat 16, the supporting block 14 is provided with an arc-shaped sliding slot 35 corresponding to the arc-shaped through slot 34 on the side facing the corresponding supporting seat 16, the arc-shaped through slot 34 movably penetrates through a linkage rod 17, and the two ends of the linkage rod 17 are respectively slidably connected in the corresponding arc-shaped sliding slot 35, and the linkage rod 17 movably penetrates through a mounting block 18.

[0026] According toFigure 7 and Figure 8 In the process of moving down the supporting block 14, the lead screw 15 is moved down synchronously, and the mounting block 18 and the shaft sleeve 19 are also moved down. When the mounting block 18 contacts the upper surface of the supporting table 1 through the cushion block 21 connected by the limiting plate 20, the cushion block 21 will not move down any more. After that, the mounting block 18 continues to move down until the elastic pressing wheel 22 contacts the upper surface of the circuit board. At this time, the two sides of the circuit board will contact the elastic pressing wheel 22 and the cushion block 21 respectively. After that, the mounting block 18 continues to move down until it moves to the lowest point. In the process of moving to the lowest point, the elastic pressing wheel 22 rotates on the shaft sleeve 19 with the mounting block 18 until the driving wheel 33 contacts the upper surface of the supporting table 1. After that, the driving wheel 33 will roll on the upper surface of the supporting table 1 due to the continuous movement of the mounting block 18, thereby rotating the sleeve 30, so that the shifting frame 31 on the sleeve 30 can press the linkage rod 17, and the mounting block 18 is rotated reversely, so as to ensure that the mounting block 18 is stably pressed to the circuit board through the elastic pressing wheel 22 thereon, thereby clamping the circuit board in the vertical direction through the cushion block 21 and the elastic pressing wheel 22, so as to ensure that the circuit board is in a horizontal state during welding, which is helpful to improve the welding quality.

[0027] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A circuit board laser welding machine, comprising a support platform (1) and a laser welding assembly (2) mounted on the upper surface thereof, characterized in that: The upper surface of the support platform (1) is provided with a strip-shaped through-groove (3) extending through the lower surface thereof, and the upper surface of the support platform (1) is further provided with two strip-shaped sliding grooves (4) parallel to the strip-shaped through-groove (3), the two strip-shaped sliding grooves (4) being respectively provided on both sides of the strip-shaped through-groove (3), each of the strip-shaped sliding grooves (4) being rollingly connected with a pulley (28), and the shaft end of the pulley (28) being fixedly connected with a support sheet (29), the upper surface of the support sheet (29) being connected with a support block (14) through an elastic mechanism, and a positioning adjustment mechanism being installed between the two support blocks (14), the middle part of the positioning adjustment mechanism being fixedly connected with a limiting mechanism, and a downward pressing mechanism being provided on the limiting mechanism.

2. A circuit board laser welding machine according to claim 1, characterized in that: The elastic mechanism includes a rod tube telescopic component 1 (36) and a rod tube telescopic component 2 (37) connected between the support plate (29) and the corresponding support block (14), and a spring 3 (38) is provided between the support plate (29) and the corresponding support block (14) and is sleeved on the outside of the rod tube telescopic component 2 (37).

3. A circuit board laser welding machine according to claim 2, characterized in that: The rod-tube telescopic assembly 1 (36) and the rod-tube telescopic assembly 2 (37) are both composed of a rod structure and a tube structure, and the relative positions of the rod structure and the tube structure on the rod-tube telescopic assembly 1 (36) and the rod-tube telescopic assembly 2 (37) are opposite. Two groups of rod-tube telescopic assemblies 1 (36) are provided on each support plate (29), and the two groups of rod-tube telescopic assemblies 1 (36) are symmetrically arranged about the axis of the corresponding rod-tube telescopic assembly 2 (37).

4. A circuit board laser welding machine according to claim 3, characterized in that: The positioning adjustment mechanism includes a screw rod (15) with a bearing passing through a support block (14), and the two screw rods (15) are arranged parallel to each other, and the screw rods (15) are arranged perpendicular to the strip-shaped through groove (3) on different planes, and each of the screw rods (15) is symmetrically threaded with two sleeves (19), and the outer bearing of the sleeve (19) is connected to the mounting block (18), and the two sections of thread provided on each screw rod (15) are rotated in opposite directions, so that when the screw rod (15) rotates, the two sleeves (19) thereon move in opposite directions, and a limiting shaft (40) passes through the sleeve (19), and the limiting shaft (40) is fixedly connected to its corresponding support block (14).

5. A circuit board laser welding machine according to claim 4, characterized in that: The positioning adjustment mechanism further comprises a strip-shaped through groove (39) passing through the mounting block (18), and a limiting plate (20) is connected to the strip-shaped through groove (39), the lower end axis of the limiting plate (20) is connected to a cushion block (21), and the cushion block (21) is arranged below the mounting block (18), and an elastic pressure wheel (22) is provided on the lower surface of the mounting block (18).

6. A circuit board laser welding machine according to claim 5, characterized in that: The positioning adjustment mechanism further comprises a mounting plate (23) fixedly connected to the side of the cushion block (21), and a limiting rod (24) perpendicular thereto is fixedly connected to the mounting plate (23), the upper end of the limiting rod (24) is sleeved with a cone sleeve (25), and a second spring (26) sleeved on the outside of the limiting rod (24) is provided between the lower end of the cone sleeve (25) and the upper surface of the mounting plate (23).

7. A circuit board laser welding machine according to claim 6, characterized in that: The limiting mechanism includes two supporting blocks (9) fixedly connected to the lower surface of the support platform (1), and a prismatic supporting rod (8) is movably passed through the two supporting blocks (9), the rear end symmetry axis of the supporting rod (8) is connected to two connecting rods (10), and each connecting rod (10) is provided with one end of a connecting tube (11), the other end of the connecting tube (11) is axially connected to a shaft column (13), and the shaft column (13) is fixedly connected to the lower surface of the support platform (1), a spring (12) is provided between one end of the connecting tube (11) provided with the connecting rod (10) and one end of the connecting rod (10) connected to the support rod (8), the front end of the support rod (8) is coaxially connected to a push-pull rod (5), and the push-pull rod (5) movably passes through a protrusion provided at the front end of the lower surface of the support platform (1).

8. The circuit board laser welding machine according to claim 7, characterized in that: The limiting mechanism further comprises a support seat (16) connected to the middle of the screw rod (15) by a bearing, and the lower end of the support seat (16) is movable through the strip-shaped through-groove (3), the lower end of the support seat (16) is provided with a connecting block (6) coaxial therewith, and the connecting block (6) is provided with an inclined groove (27), and the lower surface of the middle of the support rod (8) is provided with a pushing rod (7) perpendicular thereto, and the two ends of the pushing rod (7) are respectively movable through the two inclined grooves (27).

9. The circuit board laser welding machine according to claim 8, characterized in that: The pressing mechanism includes sleeves (30) provided on both sides of the upper end of the support seat (16), and the sleeves (30) are connected to the support seat (16) by bearings, and the sleeves (30) are coaxially sleeved on the outer side of the corresponding screw rod (15), and the two coaxial sleeves (30) are connected through an n-shaped toggle frame (31) and an n-shaped driving frame (32), and the driving frame (32) is connected to a driving wheel (33) by a bearing, and the width of the driving frame (32) is the same as that of the toggle frame (31), and the length of the driving frame (32) is greater than the length of the toggle frame (31).

10. The circuit board laser welding machine according to claim 9, characterized in that: The pressing mechanism further includes an arcuate through groove (34) passing through both sides of the support seat (16); an arcuate sliding groove (35) corresponding to the arcuate through groove (34) is provided on the side of the support block (14) facing the corresponding support seat (16); a linkage rod (17) is movably passed through the arcuate through groove (34), and both ends of the linkage rod (17) are respectively slidably connected to the corresponding arcuate sliding groove (35); the linkage rod (17) is also movably passed through the mounting block (18).

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