Welding chain link laser welding device

Abstract

The invention relates to the technical field of laser welding, in particular to a welding chain link laser welding device which comprises a base, a front sliding rail and a rear sliding rail are arranged at the top of the base, a displacement seat capable of moving left and right is installed on the two sliding rails, a leakage opening is formed in the top face of the base downwards, an auxiliary seat is fixed in the leakage opening, and a welding chain is arranged on the auxiliary seat. The top surface of the auxiliary seat inclines to the right lower part, a movable cavity channel is formed between the right side of the auxiliary seat and the right side of the ventage, the displacement seat longitudinally spans the movable cavity channel front and back, a front clamping seat assembly and a rear clamping seat assembly are installed on the displacement seat, a limiting frame is installed on the top surface of the base, and the limiting frame is located on the right sides of the clamping seat assemblies. When the two limiting plates are matched with the machine head of the laser welding machine for use, only manual loading is needed, manual positioning is not needed, and therefore the manual fatigue strength is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a laser welding device for welding chain links. Background Art

[0002] Welded bent plate chains are used in traditional mechanical equipment. The core of the chain is a conveying structure consisting of multiple chain plates and sleeves hinged together. It is mainly used in these mechanical equipment to convey materials. The welded bent plate chain is completed by a traditional welding machine. Since each chain link is composed of two chain plates welded to a sleeve between the two chain plates, in order to improve the welding accuracy in the prior art, it is necessary to weld the end of the sleeve to the chain plate through a laser welding machine. The workbench of the laser welding machine lacks an automatic positioning function. When the robot carries a welding gun to weld the sleeve to the chain plate, the worker needs to manually press the ends of the two sleeves onto the chain plate. After welding, manual unloading is required, which is inefficient and labor-intensive. Summary of the invention

[0003] In order to solve the above problems, the present invention provides the following technical solutions for positioning the sleeve and the chain plate in advance when the laser welding machine welds the chain links to improve the laser welding efficiency: The top of the base is provided with two front and rear slide rails, and the two slide rails are provided with a displacement seat that can move left and right, and a leakage opening is opened downwardly from the top surface of the base, and an auxiliary seat is fixed in the leakage opening, and the top surface of the auxiliary seat is inclined to the lower right, and a movable cavity is formed between the right side of the auxiliary seat and the right side of the leakage opening, and the displacement seat is longitudinally spanned on the movable cavity, and two front and rear clamp seat assemblies are installed on the displacement seat, and a limiting frame is installed on the top surface of the base, and the limiting frame is located on the right side of the clamp seat assembly, and a limiting plate vertically upward is fixed on the limiting frame, and the two clamp seat assemblies are symmetrical on the front and rear sides of the limiting plate, and a slide groove is opened on the displacement seat, and a screw is installed in the slide groove, and two sides of the screw are provided with mutually reverse threads, and the two clamp seat assemblies include transmission seats that are respectively transmitted on the reverse threads on both sides of the screw, and also include an installation The cam is secured to the bottom of the chassis and is supported by a lever, which is secured on the chassis to a position adjacent to the stop plate, the lever being secured to the bottom of the chassis and being capable of swivel-jointed movement relative to the stop plate.

[0004] As a further preference, a connecting seat is provided on the bottom surface of the base, a connecting hole is opened from the bottom surface of the connecting seat to the top surface of the base, bolts are installed in the connecting hole, and the base is fixed on the workbench of the laser welding machine by the bolts.

[0005] As a further preferred embodiment, an arc-shaped groove communicating left and right is opened on the top surface of the positioning seat, and the arc-shaped groove is perpendicular to the limiting plate.

[0006] As a further preferred embodiment, a stepped hole is opened in the sleeve, the right section of the stepped hole is communicated with the sleeve, the left section of the stepped hole is communicated with the left end of the sleeve, the aperture of the right section of the stepped hole is larger than the aperture of the left section of the stepped hole, the driving rod is assembled in the stepped hole, a pressure plate is fixed on the right section of the driving rod, a spring is sleeved on the left section of the driving rod, the pressure plate is located in the right section of the stepped hole, the spring is located in the left section of the stepped hole, and the right end is pressed against the pressure plate, and the left end is pressed against the left end of the stepped hole.

[0007] As a further preference, a pull rod is fixed to the top end of the column, the pull rod is bent toward the left side of the swing arm and pulled on the left side of the swing arm, and a vertically upward limiting rod is fixed to the free end of the swing arm.

[0008] As a further preferred embodiment, a carrying rod is fixed to the left ends of the two pushing racks, the top surfaces of the two carrying rods are horizontal and on the same horizontal plane, and a step is provided at the left end of the positioning seat, and the top surface of the step is on the same horizontal plane as the top surface of the carrying rod.

[0009] As a further preferred embodiment, a hinge seat is provided on the top of the transmission seat, a hinge shaft is installed on the hinge seat, the positioning seat is connected to the hinge shaft, and stop plates are fixed on the front and rear side surfaces of the positioning seat, and the bottom surface of the stop plate falls on the hinge seat.

[0010] As a further preferred embodiment, a cam is fixed on the push rack. The cam moves to the left relative to the inclined surface of the auxiliary seat. When the cam continues to move to the left along the inclined surface of the auxiliary seat, the push rack drives the positioning seat to deflect to the lower right relative to the leakage outlet.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The device is used as a tool to position the sleeve and chain plate welded into the chain link, and the two sleeves are placed in the arc grooves on the two positioning seats respectively, and the chain plate is placed on the carrier plate. The head of the laser welding machine is driven by the manipulator and automatically moves to the left side of the chain plate according to the welding position input program, and approaches the left welding area of ​​the chain plate. The displacement seat moves the two clamping seat assemblies to the right, so that the right ends of the two driving rods are pressed against the left surface of the limit plate and continue to move to the right, so that the right ends of the two driving rods are blocked and become left-moving. The left ends of the two driving rods use the hinged relationship to push the hinged end of the swing arm to move left, and the free end of the swing arm is restricted by the pull rod, thereby leading the limit rod to deflect toward the step direction, and the limit rod After deflecting toward the step direction, it will press against the left end of the sleeve, and when the clamp assembly moves to the right, it will press the right end of the sleeve against the left side of the chain plate through the positioning seat. The left side of the chain plate is under pressure, and the right side is limited by the limit plate. The left end of the sleeve is limited by the limit rod, and the right end is limited by the left side of the chain plate, so that the two sleeves and the chain plate are positioned at the same time, and at the same time, one end of the two sleeves is positioned together with the chain plate. The head of the laser welding machine is aligned with the ends of the two sleeves and welds in circles in turn, so that the ends of the two sleeves are welded on the chain plate. This device is fixed on the workbench of the laser welding machine. When used in conjunction with the head of the laser welding machine, only manual loading is required, and manual positioning is not required, thereby reducing manual fatigue strength. The inclined surface on the auxiliary seat is used to deflect the two positioning seats after retreat, so that the link can be quickly discharged after welding, which improves welding efficiency and once again reduces manual fatigue strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a laser welding device for welding chain links provided in an embodiment of the present invention, in which B represents the head of the laser welding machine, C represents the sleeve constituting the chain link, and D represents the chain plate constituting the chain link; Figure 2 A laser welding device for welding chain links provided in an embodiment of the present invention comprises Figure 1 The enlarged schematic diagram of the A part is shown; Figure 3 A laser welding device for welding chain links provided in an embodiment of the present invention comprises Figure 1 A schematic diagram of the clamp assembly is shown in the disassembled state; Figure 4 A laser welding device for welding chain links provided in an embodiment of the present invention comprises Figure 3 A schematic diagram of only the clamp assembly is shown; Figure 5 A schematic diagram of only the base and components on the base in a laser welding device for welding chain links provided in an embodiment of the present invention; Figure 6 A front plan view schematic diagram of a welding chain link laser welding device provided in an embodiment of the present invention; Figure 7 A laser welding device for welding chain links provided in an embodiment of the present invention comprises Figure 6 Schematic diagram of the extended clamp seat assembly moving toward the auxiliary seat after being deflected toward the lower right perspective.

[0013] In the figure: 1. base; 2. slide rail; 3. displacement seat; 4. leakage; 5. auxiliary seat; 6. movable cavity; 7. clamp seat assembly; 71. transmission seat; 72. positioning seat; 73. arc groove; 74. push frame; 75. sleeve; 76. drive rod; 77. swing arm; 78. stepped hole; 79. pressure plate; 710. spring; 711. pull rod; 712. limit rod; 713. carrier rod; 714. step; 715. hinge seat; 716. hinge shaft; 717. stop plate; 718. cam; 8. limit frame; 9. limit plate; 10. slide groove; 11. screw; 12. carrier plate; 13. connecting seat. DETAILED DESCRIPTION

[0014] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0015] In one embodiment, if Figure 1-Figure 7As shown: This embodiment provides a laser welding device for welding chain links, including a base 1, a front and rear slide rails 2 are provided on the top of the base 1, a displacement seat 3 is installed on the two slide rails 2, a screw is installed on at least one of the slide rails 2, a motor is installed on one end of the screw (the existing transmission technology is omitted in the present invention, the motor drives the screw to rotate, and the displacement seat 3 can be displaced left and right along the slide rail 2), a leakage port 4 is opened downward from the top surface of the base 1, an auxiliary seat 5 is fixed in the leakage port 4, the top surface of the auxiliary seat 5 is tilted to the lower right, and an active cavity 6 is formed between the right side of the auxiliary seat 5 and the right side of the leakage port 4, the displacement seat 3 spans the active cavity 6 front and back, and a Two front and rear clamping seat assemblies 7 are installed, and a limit frame 8 is installed on the top surface of the base 1. The limit frame 8 is located on the right side of the clamping seat assembly 7. A limit plate 9 is fixed on the limit frame 8. The two clamping seat assemblies 7 are symmetrically located on the front and rear sides of the limit plate 9. A slide groove 10 is opened on the displacement seat 3. A screw 11 is installed in the slide groove 10. The two sides of the screw 11 are provided with mutually reverse threads. The two clamping seat assemblies 7 include transmission seats 71 respectively transmitted on the reverse threads on both sides of the screw 11, and also include a positioning seat 72 installed on the top of the transmission seat 71. A carrier plate 12 is welded on the limit plate 9. When the clamping seat assembly 7 moves to the auxiliary seat 5, the clamping seat assembly 7 is deflected to the lower right; The clamp seat assembly 7 also includes a push frame 74 fixed to the left side of the bottom of the positioning seat 72, and a column located next to the positioning seat 72 is fixed on the push frame 74. A sleeve 75 parallel to the side of the positioning seat 72 is welded to the top of the column, and a driving rod 76 is sleeved in the sleeve 75. The left end of the driving rod 76 passes outside the left side of the column, and the right end of the driving rod 76 passes outside the right end of the sleeve 75 and extends to the limit plate 9. The left end of the driving rod 76 is connected to a swing arm 77, and the free end of the swing arm 77 is deflected to the left side of the positioning seat 72. When the right end of the driving rod 76 presses on the limit plate 9 and continues to move to the right, the driving rod 76 moves to the left along the sleeve 75, and the swing arm 77 is pushed by the left end of the driving rod 76, so that the free end of the swing arm 77 extends to the left side of the positioning seat 72.

[0016] As a further preference, a connecting seat 13 is provided on the bottom surface of the base 1, and a connecting hole is opened from the bottom surface of the connecting seat 13 to the top surface of the base 1, and bolts are installed in the connecting hole, and the base 1 is fixed on the workbench of the laser welding machine by the bolts.

[0017] As a further preferred embodiment, an arc-shaped groove 73 communicating left and right is formed on the top surface of the positioning seat 72 , and the arc-shaped groove 73 is perpendicular to the limiting plate 9 .

[0018] As a further preferred embodiment, a stepped hole 78 is opened in the sleeve 75, the right section of the stepped hole 78 is communicated with the sleeve 75, the left section of the stepped hole 78 is communicated with the left end of the sleeve 75, the aperture of the right section of the stepped hole 78 is larger than the aperture of the left section of the stepped hole 78, the driving rod 76 is assembled in the stepped hole 78, a pressure plate 79 is fixed on the right section of the driving rod 76, a spring 710 is sleeved on the left section of the driving rod 76, the pressure plate 79 is located in the right section of the stepped hole 78, the spring 710 is located in the left section of the stepped hole 78, and the right end is pressed on the pressure plate 79, and the left end is pressed on the left end of the stepped hole 78.

[0019] As a further preferred embodiment, a pull rod 711 is fixed to the top of the column, the pull rod 711 is bent toward the left side of the swing arm 77 and pulled on the left side of the swing arm 77, and a vertically upward limiting rod 712 is fixed to the free end of the swing arm 77.

[0020] like Figure 2 , Figure 6 ,as well as Figure 7 As shown, a hinge seat 715 is provided on the top of the transmission seat 71, a hinge shaft 716 is installed on the hinge seat 715, the positioning seat 72 is connected to the hinge shaft 716, and stop plates 717 are fixed on the front and rear side surfaces of the positioning seat 72. The bottom surface of the stop plate 717 falls on the hinge seat 715, and a cam 718 is fixed on the push frame 74. The cam 718 is relative to the inclined surface of the auxiliary seat 5. When the cam 718 moves to the left and continues to move to the left along the inclined surface of the auxiliary seat 5, the positioning seat 72 is driven by the push frame 74 to deflect to the lower right relative to the leakage port 4.

[0021] Working principle and effect: Before use, the device is fixed on the workbench of the laser welding machine by the connecting seat 13 and bolts; when in use, the device is used as a tool to position the sleeve C and chain plate D welded into a chain link. The positioning principle is as follows: manually place the two sleeves C in the arc grooves 73 on the two positioning seats 72 respectively, and stand the chain plate D on the carrier plate 12. The head B of the laser welding machine is driven by the manipulator (the existing technology of the laser welding machine is input according to the welding position program, which will not be repeated) and automatically moves to the left side of the chain plate D and approaches the left welding area of ​​the chain plate D. The displacement seat 3 moves the two clamp seat assemblies 7 to the right, so that the two driving The right end of rod 76 presses on the left surface of limit plate 9 and continues to move rightward, so that the right ends of the two driving rods 76 are blocked and thus move leftward. The left ends of the two driving rods 76 use the hinged relationship to push the hinged end of swing arm 77 to move leftward, and the free end of swing arm 77 is restricted by pull rod 711, thereby leading the limit rod 712 to deflect toward step 714. Since step 714 is the left end structure of positioning seat 72, and sleeve C is placed in the arc groove 73 at the top of positioning seat 72, the limit rod 712 will press on the left end of sleeve C after deflecting toward step 714, and the clamping seat assembly 7 will also move sleeve C through positioning seat 72 while moving rightward. The right end is pressed against the left side of the chain plate D. At this time, the left side of the chain plate D is under pressure, and the right side is limited by the limit plate 9. The left end of the sleeve C is limited by the limit rod 712, and the right end is limited by the left side of the chain plate D, so that the two sleeves C and the chain plate D are positioned at the same time, and at the same time, one end of the two sleeves C is positioned together with the chain plate D. The head B of the laser welding machine is aligned with the ends of the two sleeves C and welds in circles in turn, so that the ends of the two sleeves C are welded to the chain plate D. This device is fixed on the workbench of the laser welding machine. When used in conjunction with the head B of the laser welding machine, only manual loading is required, and manual positioning is not required, thereby reducing manual fatigue. Labor strength, and the positioning method is that when the right end of the sleeve C is positioned toward the left direction of the limit plate 9, the trigger driving rod 76 drives the limit rod 712 to deflect to the right, and the positioning of the left end of the sleeve C is completed synchronously. The positioning structure realizes multiple linkage actions by one action, and the positioning structure is compact, especially the left end positioning of the sleeve C is mainly based on the swing arm 77 with the limit rod 712 deflected, and the right end of the sleeve C is stationary on the left side of the chain plate D as a supplement, so that the right end of the sleeve C and the left welding area of ​​the chain plate D are fully displayed, which is convenient for the head B of the laser welding machine to complete the whole circle welding according to the circular welding trajectory of the end of the sleeve C under the control of the manipulator and the program.

[0022] like Figure 1As shown, if the hand wheel is turned, the screw 11 is driven by the hand wheel to rotate, so that the two transmission seats 71 move toward or in opposite directions along the slide groove 10 on the displacement seat 3, and the two transmission seats 71 lead the two clamping seat assemblies 7 to complete the movement toward or in opposite directions, thereby adjusting the spacing between the two clamping seat assemblies 7, the spacing between the two positioning seats 72 is adjusted, and the spacing between the arc grooves 73 on the two positioning seats 72 is adjusted. For various types of chain links, the spacing when the sleeve C is welded to the chain plate D is limited in advance. When welding chain links in batches, the positioning efficiency can be improved, which conforms to the characteristics of high-efficiency welding of laser welding machines.

[0023] like Figure 2 , Figure 4 As shown, when the clamp assembly 7 moves to the right (when the sleeve C is welded to the chain plate D and moved to the right for positioning), the right ends (free ends) of the two driving rods 76 are blocked by the limit plate 9, and when it moves to the left along the sleeve 75 under the obstruction, the spring 710 is pushed to the left by the pressure plate 79, and the spring 710 is compressed and shortened, and the left end of the driving rod 76 moves to the left and utilizes the hinge relationship to drive the swing arm 77 to deflect to the right. When the clamp assembly 7 moves to the left (when the sleeve C is welded to the chain plate D and moved to the left for retreat), the right ends of the two driving rods 76 are away from the limit plate 9, the spring 710 elastically lengthens, pushes the pressure plate 79 to move to the right, and the pressure plate 79 drives the driving rod 76 to move to the right. The left end of the driving rod 76 deflects the swing arm 77 to the left and pulls it back through the hinge relationship. At the same time, the push frame 74 moves leftward, and the cam 718 moves leftward with the push frame 74. The cam 718 enters the inclined surface of the auxiliary seat 5, and is driven by the inclined surface, causing the push frame 74 to move the positioning seat 72 relative to the leak 4. Figure 7 The chain link welded on the positioning seat 72 is deflected to the lower right, and the material is discharged through the leakage port 4 due to the deflection to the lower right. Figure 3 As shown, a discharge plate with a downward tilt is provided at the bottom of the leak 4, which is convenient for directional discharge of the chain links after welding, thereby solving the problem that welding cannot be discharged automatically. This discharge method also utilizes the structural characteristics of the left and right movement of the clamp assembly 7. The left and right movement structural characteristics are not only reflected in how to quickly position during welding, but also in how to quickly discharge after welding, and no manual labor is required during discharge.

[0024] like Figure 2As shown, a carrying rod 713 is fixed to the left ends of the two push racks 74, and the top surfaces of the two carrying rods 713 are horizontal and on the same horizontal plane. A step 714 is provided at the left end of the positioning seat 72, and the top surface of the step 714 is on the same horizontal plane as the top surface of the carrying rod 713. After the above welding, and the chain link after automatic discharge is only one chain plate D welded to one end of the two sleeves C, at this time, the welded chain link is placed on the clamp seat assembly 7 in a manner that the two sleeves C face right and the chain plate D faces left. When placed, the bottom end of the chain plate D falls on the step 714 at the left end of the two positioning seats 72. Then the second chain plate D is placed on the carrier plate 12, and the other end of the two sleeves C that are not welded with the chain plate D faces the left side of the second chain plate D. The two clamp seat assemblies 7 are driven in the same way to move the welded chain link to the right, and the right end of the driving rod 76 hits the limit plate 9 again and is blocked and moves to the left. The left end uses the hinged relationship to push the free end of the swing arm 77 with the limit rod 712 to be positioned on the left side of the first chain plate D after welding. The surface is positioned, and the two sleeves C on the chain link after welding are positioned on the arc groove 73 on the top of the two positioning seats 72 by the same positioning means, and their right ends are positioned on the left side of the second chain plate D. The welding machine head B is controlled by the same welding procedure to complete the welding of the second chain plate D. After the clamp seat assembly 7 is moved left and the material is withdrawn in the same way, the final welded link product is obtained (a chain plate D is welded at each of the left and right ends of the two sleeves C). During mass production, one end of the sleeve C is welded to the first chain plate D through a primary positioning, and then the second chain plate D is welded to the other end of the two sleeves C through a secondary positioning, which is suitable for mass production and conforms to the characteristics of efficient welding of laser welding machines.

[0025] In actual application, the programming of the laser welding machine can also be used to control the displacement seat 3 to move the two clamp seat assemblies 7 left and right. For example, when the head B of the welding machine moves to the welding area, the program controls the motor to rotate the screw, and the screw drives the displacement seat 3 to move right to complete the welding. When the head B of the welding machine is completed and retreats upward under program control. The program controls the motor to drive the screw to rotate in the opposite direction, and the screw drives the displacement seat 3 to move left and retreat, and the push frame 74 drives the cam 718 to move left to the inclined surface of the auxiliary seat 5 to complete the deflection discharge. The program control method is an existing control technology in the laser welding machine, which is programmed by technicians according to the welding process and the movement trajectory of the head B of the welding machine.

[0026] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0027] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding device for welding chain links, characterized in that: The invention comprises a base (1), wherein the top of the base (1) is provided with two front and rear slide rails (2), and the two slide rails (2) are provided with a displacement seat (3) capable of moving left and right. A leakage opening (4) is opened downward from the top surface of the base (1), and an auxiliary seat (5) is fixed in the leakage opening (4). The top surface of the auxiliary seat (5) is inclined to the lower right, and a movable cavity (6) is formed between the right side of the auxiliary seat (5) and the right side of the leakage opening (4). The displacement seat (3) longitudinally spans the movable cavity (6) from front to back, and two front and rear clamp seat assemblies (7) are installed on the displacement seat (3). The top surface of the base (1) is provided with a leakage opening (4). A limit frame (8) is installed, the limit frame (8) is located on the right side of the clamp seat assembly (7), a limit plate (9) vertically upward is fixed on the limit frame (8), the two clamp seat assemblies (7) are symmetrically arranged on the front and rear sides of the limit plate (9), a slide groove (10) is opened on the displacement seat (3), a screw rod (11) is installed in the slide groove (10), and the two sides of the screw rod (11) are provided with mutually reverse threads, the two clamp seat assemblies (7) include a transmission seat (71) respectively transmitting on the reverse threads on the two sides of the screw rod (11), and also include a fixed screw thread installed on the top of the transmission seat (71). The positioning seat (72) is welded with a carrier plate (12) on the limiting plate (9), and when the clamping seat assembly (7) moves to the auxiliary seat (5), the clamping seat assembly (7) is deflected to the lower right; the clamping seat assembly (7) also includes a push frame (74) fixed to the left side of the bottom of the positioning seat (72), and a column located beside the positioning seat (72) is fixed on the push frame (74), and a sleeve (75) parallel to the side of the positioning seat (72) is welded on the top of the column, and a driving rod (76) is sleeved in the sleeve (75), and the left end of the driving rod (76) passes through the left side of the column The right end of the driving rod (76) passes through the right end of the sleeve (75) and extends toward the limiting plate (9). The left end of the driving rod (76) is connected to a swing arm (77). The free end of the swing arm (77) is deflected to the left side of the positioning seat (72). When the right end of the driving rod (76) presses against the limiting plate (9) and continues to move to the right, the driving rod (76) moves to the left along the sleeve (75), and the left end of the driving rod (76) pushes the swing arm (77), so that the free end of the swing arm (77) extends to the left side of the positioning seat (72).

2. The welding chain link laser welding device according to claim 1, characterized in that: A connecting seat (13) is provided on the bottom surface of the base (1), and a connecting hole is provided from the bottom surface of the connecting seat (13) to the top surface of the base (1), and a bolt is installed in the connecting hole, so that the base (1) is fixed to the workbench of the laser welding machine by means of the bolt.

3. The welding chain link laser welding device according to claim 2, characterized in that: An arc-shaped groove (73) communicating left and right is formed on the top surface of the positioning seat (72), and the arc-shaped groove (73) is perpendicular to the limiting plate (9).

4. The welding chain link laser welding device according to claim 3, characterized in that: A stepped hole (78) is provided in the sleeve (75), the right section of the stepped hole (78) is communicated with the sleeve (75), the left section of the stepped hole (78) is communicated with the left end of the sleeve (75), the right section of the stepped hole (78) has a larger aperture than the left section of the stepped hole (78), the driving rod (76) is assembled in the stepped hole (78), a pressing plate (79) is fixed on the right section of the driving rod (76), a spring (710) is sleeved on the left section of the driving rod (76), the pressing plate (79) is located in the right section of the stepped hole (78), the spring (710) is located in the left section of the stepped hole (78), the right end of the spring (710) is pressed against the pressing plate (79), and the left end of the spring (710) is pressed against the left end of the stepped hole (78).

5. The welding chain link laser welding device according to claim 4, characterized in that: A pull rod (711) is fixed to the top end of the column, the pull rod (711) is bent toward the left side of the swing arm (77) and pulled on the left side of the swing arm (77), and a vertically upward limiting rod (712) is fixed to the free end of the swing arm (77).

6. The welding chain link laser welding device according to claim 5, characterized in that: A carrying rod (713) is fixed to the left ends of the two push racks (74), the top surfaces of the two carrying rods (713) are horizontal and on the same horizontal plane, and a step (714) is provided at the left end of the positioning seat (72), the top surface of the step (714) is on the same horizontal plane as the top surface of the carrying rod (713).

7. The welding chain link laser welding device according to claim 6, characterized in that: A hinge seat (715) is provided on the top of the transmission seat (71), a hinge shaft (716) is installed on the hinge seat (715), the positioning seat (72) is connected to the hinge shaft (716), and stop plates (717) are fixed on the front and rear side surfaces of the positioning seat (72), and the bottom surface of the stop plate (717) falls on the hinge seat (715).

8. The welding chain link laser welding device according to claim 7, characterized in that: A cam (718) is fixed on the push frame (74). The cam (718) is relative to the inclined surface of the auxiliary seat (5). When the cam (718) moves leftward and continues to move leftward along the inclined surface of the auxiliary seat (5), the push frame (74) drives the positioning seat (72) to deflect to the lower right relative to the leakage opening (4).

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