CN113894422A

CN113894422A - Laser-arc hybrid automatic welding device and working method thereof

Info

Publication number: CN113894422A
Application number: CN202111130943.2A
Authority: CN
Inventors: 陈玉海
Original assignee: Nanjing Chixiang Technology Co ltd
Current assignee: Nanjing Chixiang Technology Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-07

Abstract

The invention belongs to the technical field of laser arc welding, and particularly relates to a laser arc composite automatic welding device which comprises a workbench, wherein a supporting plate is fixedly connected to the top of the workbench, an L-shaped fixing plate which is vertically upward or downward is arranged on the surface of the supporting plate, a transverse moving mechanism is arranged on the surface of the L-shaped fixing plate and comprises a first servo motor, and the first servo motor is arranged on the surface of the L-shaped fixing plate. According to the invention, when the lower end of the welding wire in the arc welding gun is adjusted to the same horizontal line position of the bottom end of the laser welding gun through the longitudinal moving mechanism, then the arc welding gun detachably connected in the longitudinal moving mechanism is driven by the transverse moving mechanism to do horizontal leftward or horizontal rightward linear motion along the position corresponding to the bottom end of the laser welding gun, so that the distance position between the arc welding gun and the laser welding gun can be adjusted according to the gap condition between workpieces, and the application range is wider.

Description

Laser-arc hybrid automatic welding device and working method thereof

Technical Field

The invention relates to the technical field of laser arc welding, in particular to a laser arc hybrid automatic welding device and a working method thereof.

Background

The laser-arc hybrid welding has the advantages of large welding penetration, high process stability, high welding efficiency, strong welding gap bridging capacity, small welding deformation and the like, and can greatly improve the welding efficiency and the welding quality. In recent years, laser arc hybrid welding has received much attention.

However, in order to ensure the quality of the weld, the relative position of the intersection of the axis of the arc welding torch and the laser beam centerline of the laser welding torch with respect to the surface of the welded workpiece should remain constant during the welding process. However, in the prior art, the laser head and the welding gun are integrated, and the relative position between the laser head and the welding gun is difficult to adjust, so that the relative position between the arc welding gun and the laser welding gun is difficult to adjust according to the condition of a gap between workpieces, and the application range is narrow. Therefore, the invention provides a laser-arc hybrid automatic welding device and a working method thereof.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a laser-arc hybrid automatic welding device and a working method thereof, which solve the problem that the relative position between the existing laser-arc welding gun and the existing laser welding gun is difficult to adjust according to the gap condition between workpieces.

(II) technical scheme

The invention specifically adopts the following technical scheme for realizing the purpose:

a laser-arc composite automatic welding device comprises a workbench, wherein a supporting plate is fixedly connected to the top of the workbench, an L-shaped fixing plate which is vertically upward or downward is arranged on the surface of the supporting plate, a transverse moving mechanism is arranged on the surface of the L-shaped fixing plate and comprises a first servo motor, the first servo motor is arranged on the surface of the L-shaped fixing plate, a circular gear is connected to the output end of the first servo motor, a gear strip which is matched with the circular gear is meshed on the surface of the circular gear, a concave guide plate with a downward opening is connected to the bottom of the gear strip, a concave guide frame is arranged on the inner wall of the concave guide plate in a sliding mode, the concave guide frame is connected to the surface of the L-shaped fixing plate, a longitudinal moving mechanism is connected to the surface of the concave guide plate, and an L-shaped supporting rod is connected to the surface of the L-shaped fixing plate, the other end of the L-shaped support rod is connected with a laser welding gun, an arc welding gun is correspondingly arranged in front of one side of the laser welding gun, the arc welding gun is installed on the longitudinal moving mechanism, the arc welding gun can make horizontal reciprocating linear motion or vertical reciprocating linear motion through the longitudinal moving mechanism, and a limiting component for positioning a workpiece is arranged below the laser welding gun and the arc welding gun.

Further, longitudinal movement mechanism includes L type connecting plate, L type connecting plate is connected on the surface of concave type deflector, the first cylinder that drives is installed at the top of L type connecting plate, the first output that drives the cylinder is connected with T type connecting plate, the surface of T type connecting plate is connected with the I shape limiting plate, the surface of I shape limiting plate is equipped with the concave type connecting plate of looks adaptation, the surface of concave type connecting plate is connected with the fixed block, the surface at electric arc welder is connected to the fixed block.

Further, the interior roof of L type connecting plate is connected with L type connecting rod, the other end of L type connecting rod is connected on the internal surface of L type connecting plate, the inside sliding connection of the surface of L type connecting rod and T type connecting plate, pass through lead screw threaded connection between I shape limiting plate and the concave type connecting plate.

Further, spacing subassembly is including removing the track, remove the track and set up at the top of workstation, it drives actuating cylinder to remove orbital inside wall and install the second, T type slide is connected to the output that actuating cylinder was driven to the second, the surface connection of T type slide has the telescopic link, the spring has been cup jointed on the surface of telescopic link, the other end of telescopic link is connected with and is used for the spacing baffle of work piece.

Further, the top of workstation is equipped with the mounting groove, the second servo motor is installed to the inner diapire of mounting groove, second servo motor's output is connected with the threaded rod, the surface threaded connection of threaded rod has concave type movable plate, the surface of backup pad is equipped with the orbit that slides of intercommunication, concave type movable plate accessible slides the orbit and is connected with the rear surface of L type fixed plate.

Furthermore, the inner wall of the concave moving plate is in contact with the back of the fixed plate, and the length of the threaded rod is greater than the diameter of the sliding track.

The invention also provides a working method of the laser-arc hybrid automatic welding device, which comprises the following steps:

step A: the transverse moving mechanism and the longitudinal moving mechanism can be used for adjusting the up-down position and the left-right position of the arc welding gun, the distance position between the arc welding gun and the laser welding gun can be adjusted according to the welding seam condition of a workpiece, when the arc welding gun does horizontal reciprocating linear motion through the transverse moving mechanism, the first servo motor can be started, the arc welding gun is designed according to the mutual meshing between the circular gear and the gear strip, so when the first servo motor drives the circular gear to rotate, the gear strip meshed with the circular gear can drive the concave guide plate connected below to do horizontal reciprocating linear motion along the surface of the concave guide frame, the horizontal distance between the arc welding gun and the laser welding gun can be adjusted, when the arc welding gun does vertical reciprocating linear motion through the longitudinal moving mechanism, the first driving cylinder can be started, the output end of the first driving cylinder can push the T-shaped connecting plate to do vertical upward or vertical downward linear motion on the surface of the L-shaped connecting rod, and the arc welding gun is connected to the I-shaped limiting plate through the concave connecting plate connected to the surface of the fixing block, so that the arc welding gun can move according to the motion of the T-shaped connecting plate, and the lower end of a welding wire of the arc welding gun can be adjusted to be on the same horizontal line of the bottom end of the laser welding gun;

and B: then two workpieces to be welded are placed between the two baffles, and the surfaces of the two baffles are respectively provided with a corresponding telescopic rod and a corresponding spring, so when the two workpieces are placed between the two baffles, the two baffles can limit the surfaces of the two workpieces under the action of the elastic force of the springs respectively, then a second driving air cylinder is started to work, the T-shaped sliding plate can do horizontal and right linear motion along the top of the workbench under the pushing action of the second driving air cylinder, because one side of each of the two workpieces is in contact with one side of the T-shaped sliding plate, the two workpieces can be guaranteed to move along with the movement of the T-shaped sliding plate, when the workpieces move below the laser welding gun and the arc welding gun, the work of the second driving air cylinder is stopped, and a second servo motor is driven to drive a threaded rod to rotate, the concave movable plate rotates through the rotation of the threaded rod, under the limit of the sliding track, the concave moving plate carries the L-shaped fixed plate to do vertical upward or vertical downward linear motion, the surface height of the lower limiting workpiece can be adjusted by the laser welding gun and the electric arc welding gun in front of the L-shaped fixed plate, when the bottom end of the laser welding gun and the lower end of a welding wire in the electric arc welding gun are respectively contacted with a gap between the two workpieces, the coupling effect of any two or more welding modes can be realized, and a welding seam between the two workpieces is welded.

(III) advantageous effects

Compared with the prior art, the invention provides a laser-arc hybrid automatic welding device and a working method thereof, and the device has the following beneficial effects:

according to the invention, when the lower end of the welding wire in the arc welding gun is adjusted to the same horizontal line position of the bottom end of the laser welding gun through the longitudinal moving mechanism, the arc welding gun detachably connected in the longitudinal moving mechanism is driven by the transverse moving mechanism to do horizontal leftward or horizontal rightward linear motion along the position corresponding to the bottom end of the laser welding gun, so that the distance position between the arc welding gun and the laser welding gun can be adjusted according to the gap condition between workpieces, and the application range is wider.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a connection structure of the lateral moving mechanism and the L-shaped fixing plate according to the present invention;

FIG. 3 is a schematic view of the connection structure of the longitudinal moving mechanism and the arc welding gun according to the present invention;

FIG. 4 is a schematic view of a connection structure of a position-limiting assembly and a worktable according to the present invention;

fig. 5 is a side view of the present invention.

In the figure: 1. a work table; 2. a support plate; 3. an L-shaped fixing plate; 4. a lateral movement mechanism; 401. a first servo motor; 402. a circular gear; 403. a gear rack; 404. a concave guide plate; 405. a concave guide frame; 5. a longitudinal movement mechanism; 501. an L-shaped connecting plate; 502. a first driving cylinder; 503. a T-shaped connecting plate; 504. an I-shaped limiting plate; 505. an L-shaped connecting rod; 6. an L-shaped support bar; 7. a laser welding gun; 8. an arc welding gun; 9. a limiting component; 901. a moving track; 902. a second driving cylinder; 903. a T-shaped sliding plate; 904. a telescopic rod; 905. a spring; 906. a baffle plate; 10. a concave connecting plate; 11. a fixed block; 12. mounting grooves; 13. a second servo motor; 14. a threaded rod; 15. a concave moving plate; 16. a sliding track.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 and 2, a laser-arc hybrid automatic welding device according to an embodiment of the present invention includes a workbench 1, a supporting plate 2 is fixedly connected to a top of the workbench 1, an L-shaped fixing plate 3 is disposed on a surface of the supporting plate 2 and is vertically upward or downward along a surface of the supporting plate 2, a lateral moving mechanism 4 is disposed on a surface of the L-shaped fixing plate 3, the lateral moving mechanism 4 includes a first servo motor 401, the first servo motor 401 is mounted on a surface of the L-shaped fixing plate 3, an output end of the first servo motor 401 is connected to a circular gear 402, a surface of the circular gear 402 is engaged with a gear rack 403, a bottom of the gear rack 403 is connected to a concave guide plate 404 having a downward opening, a concave guide frame 405 is slidably disposed on an inner wall of the concave guide plate 404, the concave guide frame 405 is connected to a surface of the L-shaped fixing plate 3, a surface of the concave guide plate 404 is connected to a longitudinal moving mechanism 5, the transverse moving mechanism 4 designed in the invention is mainly used in cooperation with the longitudinal moving mechanism 5, because the longitudinal moving mechanism 5 is arranged on the transverse moving mechanism 4, when the transverse moving mechanism 4 makes horizontal leftward or horizontal rightward linear motion, the longitudinal moving mechanism 5 can move according to the movement of the transverse moving mechanism 4, and further the distance between an electric arc welding gun 8 and a laser welding gun 7 connected in the longitudinal moving mechanism 5 can be adjusted according to the condition of a gap between workpieces, compared with the traditional method that the positions of the electric arc welding gun 8 and the laser welding gun 7 are fixed, the application range is wider, the surface of an L-shaped fixing plate 3 is connected with an L-shaped supporting rod 6, the other end of the L-shaped supporting rod 6 is connected with the laser welding gun 7, the electric arc welding gun 8 is correspondingly arranged in front of one side of the laser welding gun 7, the electric arc welding gun 8 is arranged on the longitudinal moving mechanism 5, and the electric arc welding gun 8 can make horizontal reciprocating linear motion through the transverse moving mechanism 4 or can make linear motion through the longitudinal moving mechanism 5 5, and a limiting component 9 for positioning the workpiece is arranged below the laser welding gun 7 and the arc welding gun 8.

As shown in fig. 3, in some embodiments, the longitudinal moving mechanism 5 includes an L-shaped connecting plate 501, the L-shaped connecting plate 501 is connected to the surface of the female guide plate 404, a first driving cylinder 502 is installed on the top of the L-shaped connecting plate 501, the output end of the first driving cylinder 502 is connected to a T-shaped connecting plate 503, the surface of the T-shaped connecting plate 503 is connected to an i-shaped limiting plate 504, the surface of the i-shaped limiting plate 504 is provided with a matching female connecting plate 10, the surface of the female connecting plate 10 is connected to a fixing block 11, the fixing block 11 is connected to the surface of the arc welding gun 8, in order to ensure that the lower end of the laser welding gun 7 and the lower end of the welding wire of the arc welding gun 8 are located on the same horizontal line, when the T-shaped connecting plate 503 is pushed by the first driving cylinder 502 to perform a straight movement vertically downward along the surface of the L-shaped connecting rod 505, the arc welding gun 8 moves according to the movement of the T-shaped connecting plate 503, and then can carry on the vertical downward regulation to the electric arc welding gun 8, when the lower end of welding wire of the electric arc welding gun 8 is in the same horizon with the lower end position of the laser welding gun 7, stop the work to the first driving cylinder 502, then can drive the threaded spindle 14 to rotate through the second servomotor 13, and the concave movable plate 15 on the surface of threaded spindle 14 will drive the L-shaped fixed plate 3 to make the vertical upward or vertical downward linear motion, can make the laser welding gun 7 and electric arc welding gun 8 regulate the height of the welding plane of the work piece, when the bottom end of the laser welding gun 7 and lower end of welding wire in the electric arc welding gun 8 are regulated to the contact of the seam of welding of the work piece, the laser welding gun 7 can realize the coupling effect of arbitrary two or more welding methods with the electric arc welding gun 8 work, weld the seam in two work pieces and process.

As shown in fig. 3, in some embodiments, an L-shaped connecting rod 505 is connected to an inner top wall of the L-shaped connecting plate 501, the other end of the L-shaped connecting rod 505 is connected to an inner surface of the L-shaped connecting plate 501, a surface of the L-shaped connecting rod 505 is slidably connected to an inner portion of the T-shaped connecting plate 503, the i-shaped limiting plate 504 is connected to the female connecting plate 10 by a screw thread, the L-shaped connecting rod 505 enables the T-shaped connecting plate 503 to perform a certain limiting and guiding function when performing a straight-line motion vertically upwards or vertically downwards along the surface of the L-shaped connecting rod 505, and a main purpose of the L-shaped connecting rod 505 is to ensure that the T-shaped connecting plate 503 keeps a certain stability when performing an up-down adjustment, and the arc welding gun 8 can be detachably connected to the i-shaped limiting plate 504 by the screw thread through the female connecting plate 10, when the arc welding gun 8 needs to be replaced in the later period, the method is more convenient and faster.

As shown in fig. 4, in some embodiments, the limiting assembly 9 includes a moving rail 901, the moving rail 901 is opened at the top of the workbench 1, a second driving cylinder 902 is installed on the inner sidewall of the moving rail 901, the output end of the second driving cylinder 902 is connected with a T-shaped sliding plate 903, a telescopic rod 904 is connected to the surface of the T-shaped sliding plate 903, a spring 905 is sleeved on the surface of the telescopic rod 904, and a baffle 906 for limiting the workpiece is connected to the other end of the telescopic rod 904, wherein the position of the moving rail 901 corresponds to the positions of the upper arc welding gun 8 and the laser welding gun 7, so when two workpieces are limited between the two baffles 906, the gap between the two workpieces is exactly corresponding to the positions of the upper arc welding gun 8 and the laser welding gun 7, then when the arc welding gun 8 and the laser welding gun 7 do a vertical downward linear motion and contact with the gap on the surface of the workpieces, when the workpieces push the T-shaped sliding plate 903 to make a horizontal rightward linear motion along the top of the workbench 1 through the second driving cylinder 902, it can be ensured that the seams of the two workpieces can be welded by the arc welding gun 8 and the laser welding gun 7 along the same horizontal line.

As shown in fig. 5, in some embodiments, a mounting groove 12 is formed at the top of the worktable 1, a second servo motor 13 is mounted on the inner bottom wall of the mounting groove 12, a threaded rod 14 is connected to an output end of the second servo motor 13, a concave moving plate 15 is threadedly connected to the surface of the threaded rod 14, a sliding track 16 is provided on the surface of the support plate 2, the concave moving plate 15 can be connected to the rear surface of the L-shaped fixing plate 3 through the sliding track 16, when a workpiece is positioned below the laser welding gun 7 and the arc welding gun 8, the threaded rod 14 can be driven by the second servo motor 13 to rotate, then the concave moving plate 15 rotating on the surface of the threaded rod 14 can be limited by the sliding track 16, the concave moving plate 15 can perform a linear motion vertically upward or vertically downward along the back surface of the fixing plate 2, when the concave moving plate 15 drives the L-shaped fixing plate 3 to perform a linear motion vertically downward, the arc welding gun 8 and the laser welding gun 7 can contact the seam of the two workpieces below, and then the arc welding gun 8 and the laser welding gun 7 can weld the seam of the two workpieces when in work.

As shown in fig. 5, in some embodiments, the inner wall of the concave moving plate 15 contacts the back of the fixed plate 2, the length of the threaded rod 14 is greater than the diameter of the sliding track 16, and the inner wall of the notch of the concave moving plate 15 is attached to the back of the fixed plate 2, so that when the threaded rod 14 drives the concave moving plate 15 connected by the thread to rotate, the concave moving plate 15 does a straight-line motion vertically upward or vertically downward along the back of the fixed plate 2, a large gap space does not exist, and it is ensured that the concave moving plate 15 drives the L-shaped fixed plate 3 to be more stable when being adjusted vertically.

step A: the transverse moving mechanism 4 and the longitudinal moving mechanism 5 can be used for adjusting the up-down and left-right positions of the arc welding gun 8, the distance position between the arc welding gun 8 and the laser welding gun 7 can be adjusted according to the welding seam condition of a workpiece by the arc welding gun 8, when the arc welding gun 8 makes a horizontal reciprocating linear motion through the transverse moving mechanism 4, the first servo motor 401 can be started, the design is based on the mutual meshing between the circular gear 402 and the gear bar 403, so when the first servo motor 401 drives the circular gear 402 to rotate, the gear bar 403 meshed with the circular gear 402 can drive the concave guide plate 404 connected below to make a horizontal reciprocating linear motion along the surface of the concave guide frame 405, the horizontal distance between the arc welding gun 8 and the laser welding gun 7 can be adjusted, when the arc welding gun 8 makes a vertical reciprocating linear motion through the longitudinal moving mechanism 5, the first driving cylinder 502 can be started, the output end of the first driving cylinder 502 can push the T-shaped connecting plate 503 to do vertical upward or vertical downward linear motion on the surface of the L-shaped connecting rod 505, and as the arc welding gun 8 is connected to the I-shaped limiting plate 504 through the concave connecting plate 10 connected to the surface of the fixing block 11, the arc welding gun 8 can move according to the motion of the T-shaped connecting plate 503, and the lower end of the welding wire of the arc welding gun 8 can be adjusted to be on the same horizontal line of the bottom end of the laser welding gun 7;

and B: then two workpieces to be welded are placed between the two baffles 906, and because the surfaces of the two baffles 906 are provided with the corresponding telescopic rods 904 and the corresponding springs 905, when the two workpieces are placed between the two baffles 906, the two baffles 906 can be limited on the surfaces of the two workpieces under the action of the elastic force of the springs 905 respectively, then the second driving air cylinder 902 is started to work, the T-shaped sliding plate 903 can do horizontal and right linear motion along the top of the workbench 1 under the pushing action of the second driving air cylinder 902, as one side of each of the two workpieces is contacted with one side of the T-shaped sliding plate 903, the two workpieces can be guaranteed to move along with the movement of the T-shaped sliding plate 903, when the workpieces move below the laser welding gun 7 and the arc welding gun 8, the work of the second driving air cylinder 902 is stopped, the second servo motor 13 is driven to drive the threaded rod 14 to rotate, and the concave moving plate 15 rotates through the threaded rod 14, under the limit of the sliding track 16, the concave moving plate 15 takes the L-shaped fixed plate 3 to do vertical upward or vertical downward linear motion, so that the laser welding gun 7 and the arc welding gun 8 in front of the L-shaped fixed plate 3 can adjust the surface height of a lower limit workpiece, when the bottom end of the laser welding gun 7 and the lower end of a welding wire in the arc welding gun 8 are respectively contacted with a gap between the two workpieces, the coupling effect of any two or more welding modes can be realized, and the welding seam between the two workpieces is welded.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a compound automatic welding set of laser arc, includes workstation (1), its characterized in that: the top of the workbench (1) is fixedly connected with a supporting plate (2), the surface of the supporting plate (2) is provided with an L-shaped fixing plate (3) which is vertically upward or downward along the surface of the supporting plate (2), the surface of the L-shaped fixing plate (3) is provided with a transverse moving mechanism (4), the transverse moving mechanism (4) comprises a first servo motor (401), the first servo motor (401) is installed on the surface of the L-shaped fixing plate (3), the output end of the first servo motor (401) is connected with a circular gear (402), the surface of the circular gear (402) is engaged with a gear strip (403) which is matched with the surface of the L-shaped fixing plate, the bottom of the gear strip (403) is connected with a concave guide plate (404) with a downward opening, the inner wall of the concave guide plate (404) is provided with a concave guide frame (405) in a sliding manner, and the concave guide frame (405) is connected on the surface of the L-shaped fixing plate (3), the surface of concave type deflector (404) is connected with longitudinal movement mechanism (5), the surface of L type fixed plate (3) is connected with L type bracing piece (6), the other end of L type bracing piece (6) is connected with laser welder (7), the correspondence is equipped with electric arc welder (8) before one side of laser welder (7), electric arc welder (8) are installed on longitudinal movement mechanism (5), electric arc welder (8) accessible lateral movement mechanism (4) are the linear motion that the level reciprocated or do the linear motion that reciprocates from top to bottom through longitudinal movement mechanism (5), the below of laser welder (7) and electric arc welder (8) is equipped with spacing subassembly (9) that are used for the work piece location.

2. The laser-arc hybrid automatic welding device according to claim 1, characterized in that: vertical moving mechanism (5) are including L type connecting plate (501), L type connecting plate (501) are connected on the surface of concave type deflector (404), first drive actuating cylinder (502) of driving is installed at the top of L type connecting plate (501), the first output that drives actuating cylinder (502) is connected with T type connecting plate (503), the surface of T type connecting plate (503) is connected with I shape limiting plate (504), the surface of I shape limiting plate (504) is equipped with concave type connecting plate (10) of looks adaptation, the surface of concave type connecting plate (10) is connected with fixed block (11), the surface at electric arc welding gun (8) is connected in fixed block (11).

3. The laser-arc hybrid automatic welding device according to claim 2, characterized in that: the interior roof of L type connecting plate (501) is connected with L type connecting rod (505), the other end of L type connecting rod (505) is connected on the internal surface of L type connecting plate (501), the inside sliding connection of the surface of L type connecting rod (505) and T type connecting plate (503), pass through lead screw threaded connection between I shape limiting plate (504) and the concave type connecting plate (10).

4. The laser-arc hybrid automatic welding device according to claim 1, characterized in that: the limiting assembly (9) comprises a moving track (901), the moving track (901) is arranged at the top of the workbench (1), a second driving cylinder (902) is installed on the inner side wall of the moving track (901), the output end of the second driving cylinder (902) is connected with a T-shaped sliding plate (903), the surface of the T-shaped sliding plate (903) is connected with a telescopic rod (904), a spring (905) is sleeved on the surface of the telescopic rod (904), and the other end of the telescopic rod (904) is connected with a baffle (906) used for limiting a workpiece.

5. The laser-arc hybrid automatic welding device according to claim 1, characterized in that: the top of workstation (1) is equipped with mounting groove (12), second servo motor (13) are installed to the inner diapire of mounting groove (12), the output of second servo motor (13) is connected with threaded rod (14), the surface threaded connection of threaded rod (14) has concave type movable plate (15), the surface of backup pad (2) is equipped with the slide track (16) of intercommunication, concave type movable plate (15) accessible slide track (16) and the rear surface of L type fixed plate (3) are connected.

6. The laser-arc hybrid automatic welding device according to claim 5, wherein: the inner wall of the concave moving plate (15) is in contact with the back surface of the fixed plate (2), and the length of the threaded rod (14) is greater than the diameter of the sliding track (16).

7. The working method of the laser arc hybrid automatic welding device according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:

step A: the transverse moving mechanism (4) and the longitudinal moving mechanism (5) can be used for adjusting the up-down position and the left-right position of the arc welding gun (8), the arc welding gun (8) can be ensured to adjust the distance position between the arc welding gun (8) and the laser welding gun (7) according to the welding seam condition of a workpiece, when the arc welding gun (8) makes a horizontal reciprocating linear motion through the transverse moving mechanism (4), the first servo motor (401) can be started, the gear strip (403) meshed with the circular gear (402) can drive the concave guide plate (404) connected below to make a horizontal reciprocating linear motion along the surface of the concave guide frame (405) according to the mutual meshing design between the circular gear (402) and the gear strip (403), when the circular gear (402) is driven by the first servo motor (401) to rotate, the horizontal reciprocating linear motion between the arc welding gun (8) and the laser welding gun (7) can be realized, when the electric arc welding gun (8) does linear motion which reciprocates up and down through the longitudinal moving mechanism (5), the first driving cylinder (502) can be started, the output end of the first driving cylinder (502) can push the T-shaped connecting plate (503) to do vertical upward or vertical downward linear motion on the surface of the L-shaped connecting rod (505), and the electric arc welding gun (8) is connected to the I-shaped limiting plate (504) through the concave connecting plate (10) connected with the surface of the fixing block (11), so that the electric arc welding gun (8) can move according to the motion of the T-shaped connecting plate (503), and the lower end of a welding wire of the electric arc welding gun (8) can be adjusted to the same horizontal line of the bottom end of the laser welding gun (7);

and B: then two workpieces needing to be welded are placed between the two baffles (906), and because the surfaces of the two baffles (906) are respectively provided with the corresponding telescopic rod (904) and the corresponding spring (905), when the two workpieces are placed between the two baffles (906), the two baffles (906) can be limited by the elastic force of the spring (905) respectively, then the second driving cylinder (902) is started to work, the T-shaped sliding plate (903) can do horizontal and rightward linear motion along the top of the workbench (1) under the pushing action of the second driving cylinder (902), as one side of each of the two workpieces is in contact with one side of the T-shaped sliding plate (903), the two workpieces can be ensured to move along with the movement of the T-shaped sliding plate (903), and when the workpieces move below the laser welding gun (7) and the arc welding gun (8), the second driving cylinder (902) stops working, and drive second servo motor (13) and drive threaded rod (14) and rotate, concave movable plate (15) are through the rotation of threaded rod (14), under the spacing of slide rail (16), concave movable plate (15) will take L type fixed plate (3) to do vertical upward or vertical decurrent linear motion, can make laser welder (7) and electric arc welder (8) in L type fixed plate (3) the place ahead adjust the surface height of spacing work piece in the below, when the lower extreme of welding wire in bottom and electric arc welder (8) of laser welder (7) contacts with the seam department between two work pieces respectively, can realize the coupling effect of arbitrary two kinds or multiple welding methods, weld the welding seam between two work pieces and handle.