CN116021153A - A double-station battery case automatic welding device and welding method - Google Patents

Abstract

The invention belongs to the technical field of battery shell welding, and particularly relates to an automatic double-station battery shell welding device and a welding method. According to the double-station battery shell automatic welding device and the welding method, two laser welding equipment, two multi-axis welding robots, two welding support turnover mechanisms and two double-station clamping mechanisms are arranged, when the double-station battery shell automatic welding device is used, the double-station welding device is used for welding and clamping two battery shells, the two multi-axis welding robots drive the two laser welding guns to move, the battery shells on the two stations are welded, and meanwhile, when the battery shells are welded at different angles and different faces, the welding support turnover mechanisms drive the battery shells to move and weld, so that one-time automatic clamping and one-time welding forming of the two battery shells are realized, and the problems of lower automation degree and welding efficiency and larger welding deformation are solved.

Description

A double-station battery case automatic welding device and welding method

technical field

The invention relates to the technical field of battery case welding, in particular to a dual-station battery case automatic welding device and a welding method.

Background technique

As a commonly used energy supply unit, the safety of the battery has always attracted much attention. When the battery pack is used, the battery pack needs to be packaged in the battery case. As the battery is used as the main new energy source, the safety of the battery case The demand for usage is also increasing day by day.

When welding the battery case, most of the existing battery case welding devices use custom-made fixtures and welding robots for single-station welding. This welding method not only has low welding efficiency, but also is limited by the quantity of production orders. Influence, in order to save production costs, most custom-made fixtures have a low degree of automation. In the welding process, not only manual clamping is required, but also multiple clamping is required when welding different parts of the battery case, resulting in a high degree of welding automation. And the welding efficiency is low, and after many times of clamping, there is a problem of large welding deformation, so a double-station battery case automatic welding device and welding method are needed.

Contents of the invention

Based on the technical problems of the existing battery case welding device, the degree of automation and welding efficiency is low, and the welding deformation is relatively large, the present invention proposes a dual-station battery case automatic welding device and a welding method.

A dual-station battery case automatic welding device proposed by the present invention includes laser welding equipment and a multi-axis welding robot, and the two laser welding equipment correspond to the two multi-axis welding robots.

The two multi-axis welding robots are located on the same horizontal straight line, and a laser welding gun is fixedly installed at one end of the multi-axis welding robot, and the laser welding gun is connected with the laser welding equipment.

Both sides of the multi-axis welding robot are provided with a welding support turning mechanism, and the surface of the welding support turning mechanism is provided with a double-station clamping mechanism.

Among them, the welding support turning mechanism is used to provide support for the double-station clamping mechanism, and drives the double-station clamping mechanism and the battery case to perform flip welding.

Among them, the double-station clamping mechanism is used for clamping and positioning welding of the battery case.

Preferably, the welding support turning mechanism includes a fixed base, the upper surface of the fixed base is fixed with support box columns by bolts, and the two support box columns are symmetrically centered on the axis of the fixed base;

The surface of the supporting box column is rotatably connected with a turning drive wheel through a bearing and a rotating shaft, and a turning driving motor is fixedly installed on the surface of one of the supporting box columns. The overturning drive wheel is fixedly connected.

Preferably, the surface of the overturning driving wheel is provided with a connection installation frame, and the two ends of the connection installation frame are respectively fixedly connected to the surfaces of the two overturning driving wheels through bolts.

Preferably, the double-station clamping mechanism includes a clamp mounting plate fixedly mounted on the surface of the connecting mounting frame, and the two clamping mounting plates are symmetrically distributed around the axis of the connecting mounting frame.

Preferably, the upper surface of the fixture mounting plate is respectively fixedly connected with a battery case welding spacer and a battery case welding limit angle plate through bolts, and a plurality of the battery case welding spacers and a plurality of the battery case welding limiters Corresponding to the angle plate, a plurality of the battery case welding pads and a plurality of the battery case welding limit angle plates are symmetrically distributed around the axis of the welded battery case;

The surface of the welding limit angle plate of the battery case is L-shaped.

Preferably, a fixed clamping cylinder, a fixed clamping limit cylinder, a bottom shell limit clamping cylinder and an adjustable pneumatic clamping mechanism are respectively fixedly installed on the surface of the clamp mounting plate;

The two fixed clamping cylinders are distributed symmetrically around the axis of the welded battery case, both of which are located on one side of the welded battery case, and the fixed clamping cylinders include a fixed clamping cylinder rod, and one end of the fixed clamping gas rod is fixedly installed with a fixed chuck.

Preferably, a plurality of said fixed clamping limit cylinders are respectively located on the four sides of the welded battery case, the surface of said fixed clamping limit cylinders is fixed with a limit hinge seat by bolts, and said fixed clamp limit The cylinder includes a fixed clamping limit air rod, and one end of the fixed clamping limit air rod is fixedly installed with a fixed limit chuck;

The surface of the fixed limit chuck is hinged with the surface of the limit hinge seat.

Preferably, the two bottom casing limiting clamping cylinders correspond to the two fixed clamping cylinders, and bottom casing clamping fixtures are installed on the surface of the bottom casing limiting clamping cylinders, and the bottom casing clamping The holding fixture is fixedly connected with the surface of the fixture mounting plate through the supporting angle plate.

Preferably, the adjustable pneumatic clamping mechanism includes stroke cylinders, and four stroke cylinders are symmetrically distributed around the axis of the clamp mounting plate;

The stroke cylinder includes a stroke air rod, one end of the stroke air rod is fixedly mounted with a moving cylinder base, the surface of the fixture mounting plate is fixedly mounted with a stroke guide rail, and the surface of the movable cylinder base is slidingly connected to the surface of the stroke guide rail ;

The surface of the mobile cylinder seat is fixedly equipped with a mobile clamping cylinder, the mobile clamping cylinder includes a mobile clamping air rod, the surface of the mobile clamping cylinder is fixedly installed with a chuck frame, and the inner wall of the chuck frame A movable chuck is slidably connected, and one end of the movable clamping air rod is fixedly connected with the surface of the movable chuck.

Preferably, a welding method of a dual-station battery case automatic welding device includes the following steps:

Step 1. Place the battery case to be welded on the four fixture mounting plates, and support and position the battery case through the battery case welding pads and the battery case welding limit angle plate on the fixture mounting plate;

Step 2. Through the fixed clamping cylinder, the fixed clamping limit cylinder, the bottom shell limit clamping cylinder and the adjustable pneumatic clamping mechanism, the fixed chuck, the fixed limit chuck, the bottom shell clamping fixture and the movable clamp are driven The head is welded and fixed to the welded battery case;

Step 3. Drive two laser welding guns to move through two multi-axis welding robots, weld the battery case clamped on the two fixture mounting plates on the welding support flip mechanism on one side of the multi-axis welding robot, and turn over The drive motor drives the turning drive wheel to rotate, drives the connecting mounting frame and the two fixture mounting plates and the two battery cases clamped on the fixture mounting plates to perform a turning movement, and cooperates with the multi-axis welding robot for welding;

Step 4. When the multi-axis welding robot welds the two battery cases on one side of the welding support and turning mechanism, the battery case is picked up and clamped on the welding supporting turning mechanism on the other side.

Beneficial effects among the present invention are:

1. By setting up two laser welding equipment, two multi-axis welding robots, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery cases are fixed by the double-station clamping mechanisms Carry out welding and clamping, and drive two laser welding guns to move through two multi-axis welding robots to weld the battery case on the two stations. The support and turning mechanism drives the battery case to perform motion welding, realizing automatic clamping and automatic welding of two battery cases at one time, thus solving the problem of battery case welding device, low automation degree and welding efficiency, and large welding deformation The problem.

2. By setting the double-station clamping mechanism, when in use, the fixed clamping cylinder, the fixed clamping limit cylinder, the bottom shell limit clamping cylinder and the adjustable pneumatic clamping mechanism are used to drive the fixed clamping head and the fixed limiter. Position chuck, bottom case clamping fixture and movable chuck are used to weld and fix the welded battery case, and through the fixed clamping cylinder, fixed clamping limit cylinder, bottom shell limit clamping cylinder and adjustable pneumatic clamp The holding mechanism is detachable and movable using bolts and other installation methods, and is installed on the fixture mounting plate, which is convenient for installation and adjustment according to different types of battery cases when welding, so as to realize automatic clamping of different types of battery cases Effect.

Description of drawings

Fig. 1 is a schematic diagram of a double-station battery case automatic welding device and welding method proposed by the present invention;

Fig. 2 is a perspective view of the multi-axis welding robot structure of a double-station battery case automatic welding device and welding method proposed by the present invention;

Fig. 3 is a three-dimensional view of a fixed base structure of a dual-station battery case automatic welding device and welding method proposed by the present invention;

Fig. 4 is a three-dimensional view of the fixture mounting plate structure of a dual-station battery case automatic welding device and welding method proposed by the present invention;

Fig. 5 is a three-dimensional view of the bottom case limit clamping cylinder structure of a double-station battery case automatic welding device and welding method proposed by the present invention;

Fig. 6 is a perspective view of the stroke cylinder structure of a dual-station battery case automatic welding device and welding method proposed by the present invention.

In the figure: 1. Laser welding equipment; 2. Multi-axis welding robot; 3. Laser welding gun; 4. Fixed base; 401, supporting box column; ; 501, battery shell welding pad; 502, battery shell welding limit angle plate; 503, fixed clamping cylinder; 504, fixed clamping limit cylinder; 505, bottom shell limit clamping cylinder; 506, fixed clamping Air rod; 507, fixed chuck; 508, limit hinged seat; 509, fixed clamping limit air rod; 510, fixed limit chuck; 511, bottom shell clamping fixture; 512, stroke cylinder; 513, stroke Air bar; 514, mobile cylinder seat; 515, stroke guide rail; 516, mobile clamping cylinder; 517, mobile clamping air bar; 518, chuck frame; 519, mobile chuck.

Implementation

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Embodiment one

Referring to FIGS. 1-6 , a dual-station battery case automatic welding device includes a laser welding device 1 and a multi-axis welding robot 2 , and the two laser welding devices 1 correspond to the two multi-axis welding robots 2 .

Two multi-axis welding robots 2 are located on the same horizontal straight line, and one end of the multi-axis welding robots 2 is fixedly equipped with a laser welding gun 3 , and the laser welding gun 3 is connected with the laser welding equipment 1 .

When in use, the laser welding gun 3 is connected to the laser welding equipment 1, and the multi-axis welding robot 2 drives the laser welding gun 3 to move, so as to perform automatic laser welding on the battery case.

Both sides of the multi-axis welding robot 2 are provided with a welding support turning mechanism, and the surface of the welding support turning mechanism is provided with a double-station clamping mechanism.

Among them, the welding support turning mechanism is used to provide support for the double-station clamping mechanism, and drives the double-station clamping mechanism and the battery case to perform flip welding.

The welding support turning mechanism includes a fixed base 4, and the upper surface of the fixed base 4 is fixed with a supporting box column 401 by bolts, and the two supporting box columns 401 are symmetrical about the axis of the fixed base 4, respectively.

The surface of the supporting box column 401 is rotatably connected with a turning drive wheel 402 through a bearing and a rotating shaft, and a turning driving motor is fixedly installed on the surface of one of the supporting box columns 401, and the output shaft of the turning driving motor is connected to one of the turning driving wheels 402 through a key and a keyway. Fixed connection.

When in use, the output shaft of the turning drive motor drives one of the turning driving wheels 402 to rotate through the key and the keyway.

The surface of the overturning driving wheel 402 is provided with a connecting mounting frame 403, and the two ends of the connecting mounting frame 403 are respectively fixedly connected to the surfaces of the two overturning driving wheels 402 through bolts.

When in use, the connecting installation frame 403 is supported by two turning driving wheels 402 , and one turning driving wheel 402 is driven to rotate by the turning driving motor, and the connecting mounting frame 403 and the other turning driving wheel 402 are driven to rotate.

When in use, the connection installation frame 403 has the function of connecting the two overturning driving wheels 402, and provides an installation basis for the double-station clamping mechanism.

Among them, the double-station clamping mechanism is used for clamping and positioning welding of the battery case.

The double-station clamping mechanism includes a fixture mounting plate 5 fixedly mounted on the surface of the connection mounting frame 403 , and the two fixture mounting plates 5 are symmetrically distributed around the axis of the connection mounting frame 403 .

When in use, the fixture mounting plate 5 is used for battery case welding, and provides a platform for the battery case and the fixture.

The upper surface of the fixture mounting plate 5 is respectively fixedly connected with a battery case welding spacer 501 and a battery case welding limit angle plate 502 through bolts, and a plurality of battery case welding spacers 501 correspond to a plurality of battery case welding limit angle plates 502 A plurality of battery case welding pads 501 and a plurality of battery case welding limiting angle plates 502 are symmetrically distributed around the axis of the battery case being welded.

The surface of the battery case welding limit angle plate 502 is L-shaped.

During use, a plurality of battery case welding pads 501 are used to support the battery case during welding.

When in use, a plurality of battery case welding limiting angle plates 502 cooperate with a plurality of battery case welding pads 501 to limit the housing components during battery case welding.

A fixed clamping cylinder 503, a fixed clamping limit cylinder 504, a bottom shell limit clamping cylinder 505 and an adjustable pneumatic clamping mechanism are respectively fixedly installed on the surface of the clamp mounting plate 5.

The two fixed clamping cylinders 503 are distributed symmetrically around the axis of the welded battery case. The two fixed clamping cylinders 503 are located on one side of the welded battery case. The fixed clamping cylinders 503 include a fixed clamping air rod 506. One end of the fixed clamping gas rod 506 is fixedly installed with a fixed chuck 507 .

When in use, the fixed clamping air rod 506 protrudes from the fixed clamping cylinder 503 to drive the fixed chuck 507 to move and contact the surface of the welded battery case to clamp the welded battery case.

A plurality of fixed clamping limit cylinders 504 are respectively located on the four sides of the welded battery case, and the surface of the fixed clamping limit cylinders 504 is fixed with a limit hinge seat 508 by bolts, and the fixed clamping limit cylinders 504 include fixed clamping The limit gas rod 509 is fixedly clamped with a fixed limit chuck 510 at one end of the limit gas rod 509 .

The surface of the fixed limit clamp 510 is hinged to the surface of the limit hinge seat 508 .

When in use, the fixed clamping limit air rod 509 is stretched out from the fixed clamping limit cylinder 504, and the fixed clamping clamp 510 is driven to move around the joint of the limit hinged seat 508, driving the fixed limit clamp The head 510 moves in contact with the welded battery case to limit the welded battery case, and cooperates with the battery case welding pad 501 and the battery case welding limit angle plate 502 to limit and clamp the welded battery case.

The two bottom shell limit clamping cylinders 505 correspond to the two fixed clamping cylinders 503. The bottom shell limit clamping cylinders 505 are equipped with a bottom shell clamping fixture 511 on the surface, and the bottom shell clamping fixture 511 passes through the support angle plate It is fixedly connected with the surface of the fixture mounting plate 5 .

When in use, the two bottom case clamping fixtures 511 are driven by the two bottom case clamping cylinders 505 to move, and clamp and limit welding is performed on the bottom plate of the welded battery case.

The adjustable pneumatic clamping mechanism includes stroke cylinders 512 , and four stroke cylinders 512 are symmetrically distributed around the axis of the clamp mounting plate 5 .

The stroke cylinder 512 includes a stroke air rod 513, one end of the stroke air rod 513 is fixedly mounted with a moving cylinder seat 514, the surface of the fixture mounting plate 5 is fixedly mounted with a stroke guide rail 515, and the surface of the mobile cylinder seat 514 is slidingly connected with the surface of the stroke guide rail 515 .

The surface of the mobile cylinder base 514 is fixedly equipped with a mobile clamping cylinder 516, the mobile clamping cylinder 516 includes a mobile clamping air rod 517, and the surface of the mobile clamping cylinder 516 is fixedly equipped with a chuck frame 518, and the inner wall of the chuck frame 518 slides A movable chuck 519 is connected, and one end of the movable clamping air rod 517 is fixedly connected with the surface of the movable chuck 519 .

By setting up a double-station clamping mechanism, when in use, the fixed clamping head 507, The fixed limit chuck 510, the bottom shell clamping fixture 511 and the movable clamp 519 perform welding and fixed clamping on the welded battery case, and through the fixed clamping cylinder 503, the fixed clamping limit cylinder 504, and the bottom shell limit clamp The holding cylinder 505 and the adjustable pneumatic clamping mechanism are mounted on the fixture mounting plate 5 by using detachable and movable installation methods such as bolts, which is convenient for installation and adjustment according to different types of battery shells when welding, so as to realize different The effect of automatic clamping of the battery case of the model.

By setting up two laser welding equipment 1, two multi-axis welding robots 2, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery cases are fixed by the double-station clamping mechanism Carry out welding and clamping, and drive two laser welding guns 3 to move through two multi-axis welding robots 2, and weld the battery case on the two stations. At the same time, when welding the battery case at different angles and on different surfaces, The battery case is driven by the welding support turning mechanism to carry out motion welding, realizing automatic clamping and automatic welding of two battery cases at one time, thus solving the problem of battery case welding device, low automation and welding efficiency, and welding deformation Bigger problem.

Embodiment two

Referring to Figures 1-6, a welding method for a dual-station battery case automatic welding device includes the following steps:

Step 1. Place the battery case to be welded on the four fixture mounting plates 5, and support and position the battery case through the battery case welding pad 501 and the battery case welding limit angle plate 502 on the fixture mounting plate 5 .

Step 2. Through the fixed clamping cylinder 503, the fixed clamping limit cylinder 504, the bottom shell limit clamping cylinder 505 and the adjustable pneumatic clamping mechanism, the fixed clamp 507, the fixed limit clamp 510, and the bottom shell clamp are driven The holding fixture 511 and the movable chuck 519 are used to weld and fix the battery case.

Step 3. Two multi-axis welding robots 2 drive two laser welding guns 3 to move, and weld the battery case clamped on the two fixture mounting plates 5 on the welding support turning mechanism on one side of the multi-axis welding robot 2 , and drive the turning drive wheel 402 to rotate through the turning drive motor, drive the connecting mounting frame 403 and the two fixture mounting plates 5 and the two battery cases clamped on the fixture mounting plate 5 to perform turning movements, and cooperate with the multi-axis welding robot 2 for welding .

Step 4: When the multi-axis welding robot 2 welds the two battery cases on one side of the welding support turning mechanism, the welding workpiece on the other side is picked up and clamped on the welding support turning mechanism.

By setting up two laser welding equipment 1, two multi-axis welding robots 2, two welding support flipping mechanisms and two double-station clamping mechanisms, when in use, the two battery cases are fixed by the double-station clamping mechanism Carry out welding and clamping, and drive two laser welding guns 3 to move through two multi-axis welding robots 2, and weld the battery case on the two stations. At the same time, when welding the battery case at different angles and on different surfaces, The battery case is driven by the welding support turning mechanism to carry out motion welding, realizing automatic clamping and automatic welding of two battery cases at one time, thus solving the problem of battery case welding device, low automation and welding efficiency, and welding deformation Bigger problem.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a duplex position battery case automatic welder, includes laser welding equipment (1) and multiaxis welding robot (2), its characterized in that: the two laser welding devices (1) correspond to the two multi-axis welding robots (2);

the two multi-axis welding robots (2) are positioned on the same horizontal line, one end of each multi-axis welding robot (2) is fixedly provided with a laser welding gun (3), and the laser welding gun (3) is connected with laser welding equipment (1);

welding support turnover mechanisms are arranged on two sides of the multi-axis welding robot (2), and double-station clamping mechanisms are arranged on the surfaces of the welding support turnover mechanisms;

the welding support turnover mechanism is used for supporting the double-station clamping mechanism and driving the double-station clamping mechanism and the battery shell to perform turnover welding;

the double-station clamping mechanism is used for clamping and positioning the battery shell.

2. The automatic welding device for double-station battery cases according to claim 1, wherein: the welding support turnover mechanism comprises a fixed base (4), wherein a support box column (401) is fixedly arranged on the upper surface of the fixed base (4) through bolts, and the two support box columns (401) are symmetrical and respectively with the axis of the fixed base (4) as the center;

the surface of the supporting box column (401) is rotationally connected with turnover driving wheels (402) through bearings and a rotating shaft, one of the surfaces of the supporting box column (401) is fixedly provided with a turnover driving motor, and an output shaft of the turnover driving motor is fixedly connected with one of the turnover driving wheels (402) through a key and a key slot.

3. The automatic welding device for double-station battery cases according to claim 2, wherein: the surface of upset drive wheel (402) is provided with connection mounting bracket (403), the both ends of connection mounting bracket (403) pass through the bolt respectively with two the fixed connection of surface of upset drive wheel (402).

4. A duplex battery case automatic welding apparatus according to claim 3, wherein: the double-station clamping mechanism comprises clamp mounting plates (5), wherein the clamp mounting plates (5) are fixedly mounted on the surfaces of connecting mounting frames (403), and the two clamp mounting plates (5) are symmetrically distributed with the axis of the connecting mounting frames (403) as the center.

5. The automatic welding device for double-station battery cases according to claim 4, wherein: the upper surface of the fixture mounting plate (5) is fixedly connected with a battery shell welding cushion block (501) and a battery shell welding limit angle plate (502) respectively through bolts, a plurality of battery shell welding cushion blocks (501) correspond to the battery shell welding limit angle plates (502), and the battery shell welding cushion blocks (501) and the battery shell welding limit angle plates (502) are symmetrically distributed by taking the axis of a welded battery shell as the center;

the surface of the battery shell welding limit angle plate (502) is L-shaped.

6. The automatic welding device for double-station battery cases according to claim 5, wherein: the surface of the fixture mounting plate (5) is fixedly provided with a fixed clamping cylinder (503), a fixed clamping limiting cylinder (504), a bottom shell limiting clamping cylinder (505) and an adjustable pneumatic clamping mechanism respectively;

the two fixed clamping cylinders (503) are symmetrically distributed by taking the axis of the welded battery shell as the center, the two fixed clamping cylinders (503) are both positioned on one side face of the welded battery shell, each fixed clamping cylinder (503) comprises a fixed clamping air rod (506), and a fixed clamping head (507) is fixedly arranged at one end of each fixed clamping air rod (506).

7. The automatic welding device for double-station battery cases according to claim 6, wherein: the fixed clamping limiting cylinders (504) are respectively positioned on four side surfaces of the welded battery shell, limiting hinging seats (508) are fixedly arranged on the surfaces of the fixed clamping limiting cylinders (504) through bolts, the fixed clamping limiting cylinders (504) comprise fixed clamping limiting gas rods (509), and fixed limiting chucks (510) are fixedly arranged at one ends of the fixed clamping limiting gas rods (509);

the surface of the fixed limit chuck (510) is hinged with the surface of the limit hinging seat (508).

8. The automatic welding device for double-station battery cases according to claim 7, wherein: two spacing centre gripping cylinder of drain pan (505) with two fixed centre gripping cylinder (503) are corresponding, the surface mounting of spacing centre gripping cylinder of drain pan (505) has drain pan centre gripping anchor clamps (511), the fixed connection of surface of drain pan centre gripping anchor clamps (511) through supporting the scute and anchor clamps mounting panel (5).

9. The automatic welding device for double-station battery cases according to claim 8, wherein: the adjustable pneumatic clamping mechanism comprises stroke cylinders (512), and the four stroke cylinders (512) are symmetrically distributed by taking the axis of the clamp mounting plate (5) as the center;

the stroke cylinder (512) comprises a stroke air rod (513), a movable cylinder seat (514) is fixedly arranged at one end of the stroke air rod (513), a stroke guide rail (515) is fixedly arranged on the surface of the clamp mounting plate (5), and the surface of the movable cylinder seat (514) is in sliding connection with the surface of the stroke guide rail (515);

the surface fixed mounting of removal cylinder block (514) has removal centre gripping cylinder (516), remove centre gripping cylinder (516) including removing centre gripping gas pole (517), the surface fixed mounting of removal centre gripping cylinder (516) has chuck frame (518), the inner wall sliding connection of chuck frame (518) has removal chuck (519), the one end of removing centre gripping gas pole (517) is connected with the surface fixed of removal chuck (519).

10. The welding method of a double-station battery case automatic welding device according to any one of claims 1 to 9, comprising the steps of:

firstly, placing a battery shell to be welded on four fixture mounting plates (5), and supporting and positioning the battery shell through a battery shell welding cushion block (501) and a battery shell welding limit angle plate (502) on the fixture mounting plates (5);

step two, driving a fixed chuck (507), a fixed limit chuck (510), a bottom shell clamping fixture (511) and a movable chuck (519) to weld and fix and clamp a welding battery shell through a fixed clamping cylinder (503), a fixed clamping limit cylinder (504), a bottom shell limiting clamping cylinder (505) and an adjustable pneumatic clamping mechanism;

step three, driving two laser welding guns (3) to move through two multi-axis welding robots (2), welding battery shells clamped on two clamp mounting plates (5) on a welding support turnover mechanism positioned on one side of the multi-axis welding robots (2), driving turnover driving wheels (402) to rotate through turnover driving motors, driving a connecting mounting frame (403) and the two clamp mounting plates (5) and the two battery shells clamped on the clamp mounting plates (5) to perform turnover movement, and welding by matching with the multi-axis welding robots (2);

and fourthly, when the multi-axis welding robot (2) welds two battery shells on the welding support turnover mechanism on one side, the welding support turnover mechanism on the other side performs workpiece fetching and clamping on the battery shells.

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