CN221773778U - Welding device - Google Patents

Abstract

The utility model provides a welding device, and relates to the technical field of welding. The welding device comprises a base station, a clamp, a first driving assembly and a second driving assembly, wherein the clamp comprises a limiting mechanism and a carrier plate provided with a jacking hole, the limiting mechanism comprises a jacking assembly arranged at the bottom of the carrier plate and a supporting plate arranged at the jacking end of the jacking assembly, and the supporting plate is matched with the jacking hole and used for bearing a piece to be welded; the limiting mechanism further comprises an alignment assembly arranged at the top of the carrier plate, and the alignment assembly is used for aligning the piece to be welded positioned on the supporting plate; the first driving assembly is arranged on the base station, the driving end of the first driving assembly is connected with the carrier plate and used for driving the carrier plate to move; the second driving assembly is arranged on the base station, a welding head is arranged at the driving end of the second driving assembly and used for driving the welding head to move so as to weld the workpiece to be welded. The fixture of the welding device can stably convey the to-be-welded piece, so that the accuracy of the welding position of the to-be-welded piece is ensured, and the welding quality of the to-be-welded piece is correspondingly ensured.

Description

Welding device

Technical Field

The utility model relates to the technical field of welding, in particular to a welding device.

Background

The welding of the seals is involved in the lithium battery production line, and the welding quality of the positions directly influences the quality of the lithium batteries. In the prior art, a lithium battery to be welded is generally conveyed to a clamp of a welding device for conveying, and then the lithium battery positioned at a welding position is welded through a welding head; the fixture can shake and deviate in the process of conveying the lithium battery, so that the position of a piece to be welded deviates, and the welding position accuracy of the subsequent welding head to the piece to be welded is affected.

Disclosure of utility model

The utility model aims to provide a welding device, which solves the technical problem that the position deviation of a workpiece to be welded is easy to occur when a clamp in the existing welding device is used for conveying the workpiece, so that the welding position accuracy of the workpiece is affected.

In order to solve the above problems, the present utility model provides a welding device, comprising:

A base station;

The fixture comprises a limiting mechanism and a carrier plate provided with a jacking hole, wherein the limiting mechanism comprises a jacking component arranged at the bottom of the carrier plate and a supporting plate arranged at the jacking end of the jacking component, and the supporting plate is matched with the jacking hole and is used for bearing a piece to be welded; the limiting mechanism further comprises an alignment assembly arranged at the top of the carrier plate, and the alignment assembly is used for aligning a piece to be welded positioned on the supporting plate;

The first driving assembly is arranged on the base station, and the driving end of the first driving assembly is connected with the carrier plate and used for driving the carrier plate to move; and

The second driving assembly is arranged on the base station, and a welding head is arranged at the driving end of the second driving assembly and used for driving the welding head to move so as to weld the workpieces to be welded.

Optionally, the alignment assembly includes a carrier plate disposed on a top surface of the carrier plate:

a first reference member;

The first alignment driving piece is connected with a first push plate, the first push plate and the first reference piece are positioned on two opposite sides of the jacking hole along a first direction, and the first alignment driving piece is used for driving the first push plate to move towards or away from the first reference piece;

A second reference member;

A second alignment driving piece, the driving end is connected with a second push plate, the second push plate and the second reference piece are positioned at two opposite sides of the jacking hole along a second direction, the second alignment driving piece is used for driving the second pushing plate to move towards or away from the second reference piece; wherein the second direction is perpendicular to the first direction.

Optionally, the number of the jacking holes is two, the number of the limiting mechanisms is two, and the two limiting mechanisms are in one-to-one correspondence with the two jacking holes.

Optionally, the two jacking holes are arranged at intervals along the first direction, a first baffle is arranged between the two jacking holes, and the first baffle is simultaneously used as a first reference piece of the two groups of limiting mechanisms;

And a second baffle plate is arranged on the same side of the two jacking holes along the second direction, and the second baffle plate is simultaneously used as second reference parts of the two groups of limiting mechanisms.

Optionally, the second alignment driving parts of the two groups of limiting mechanisms are respectively located at two sides of the first baffle plate and are fixedly connected to the first baffle plate.

Optionally, the second baffle and the two jacking holes are provided with observation holes in the corresponding areas.

Optionally, the first driving component comprises a Y-direction linear driving piece arranged on the base station and two sliding connection tables extending along the Y direction and arranged at intervals along the X direction, and two ends of the carrier plate along the X direction are correspondingly in sliding connection with the two sliding connection tables one by one; the driving end of the Y-direction linear driving piece is connected with the carrier plate.

Optionally, the base platform is located in the area between the two sliding connection platforms and sinks to form a containing space, and the containing space is used for containing the lower area of the clamp.

Optionally, two first driving components are provided, and two opposite sides of the two first driving components share the same sliding table; the number of the clamps is two corresponding to the number of the first driving components.

Optionally, the welding device further comprises a controller and a manipulator for conveying the workpiece to be welded, wherein the manipulator, the jacking assembly, the alignment assembly, the first driving assembly and the second driving assembly are all connected to the controller.

According to the welding device provided by the utility model, on one hand, the aligning component and the jacking component of the clamp are respectively positioned at the top and the top of the carrier plate, the carrier plate positioned in the middle area is connected with the driving end of the first driving component, so that when the first driving component drives the clamp, the driving acting force directly acts on the carrier plate, the distances between the jacking component and the aligning component and the carrier plate are smaller, the synchronous mobility of the jacking component and the carrier plate is higher, correspondingly, the synchronous mobility of the push plate positioned at the aligning position and the to-be-welded part carried on the push plate and the carrier plate is higher, and therefore, the shaking offset of the jacking component, the aligning component, the supporting plate and the to-be-welded part in the moving process of the clamp is effectively reduced, the position accuracy of the to-be-welded part at the welding position is correspondingly improved, and the welding position accuracy of the to-be-welded part is further improved, and the effectiveness of welding is ensured.

On the other hand, when the first driving assembly drives the empty clamp to move, the supporting plate is positioned at the lowest position under the driving of the jacking assembly, so that the gravity center of the whole clamp is reduced, the stability of the whole clamp in the moving process is further improved, the shaking offset of each assembly is reduced, and the position accuracy of the clamp for bearing the part to be welded is ensured; similarly, the first driving assembly drives the clamp carrying the to-be-welded piece to move, the supporting plate descends to a welding position similar to the coplanarity of the supporting plate, the gravity center of the whole clamp can be lowered, shaking offset of each assembly and the to-be-welded piece in the moving process is reduced, and the position accuracy of the to-be-welded piece is further improved, so that the welding position accuracy of the welding head to the to-be-welded piece is further ensured, and the effectiveness of welding is ensured.

In still another aspect, when the workpiece to be welded is fed into the clamp and the workpiece is discharged from the clamp, the jacking component can jack the supporting plate to a position higher than the aligning component to serve as a conveying position and a discharging position, so that interference generated by the conveying component with the aligning component when the conveying component feeds the workpiece to be welded and discharges the workpiece to be welded is reduced, normal conveying of the workpiece to be welded and the workpiece to be welded is ensured correspondingly, and limitation of arrangement positions of the aligning component is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of a welding device according to an embodiment of the present utility model;

Fig. 2 is a front view of a welding device according to an embodiment of the present utility model;

FIG. 3 is a left side view of a welding device according to an embodiment of the present utility model;

FIG. 4 is an isometric view of a welding apparatus with a second drive assembly removed;

Fig. 5 is an isometric view of a fixture carrying a piece to be welded in a welding device according to an embodiment of the present utility model.

Reference numerals illustrate:

10-a piece to be welded; 100-base station; 110-accommodating space; 120-steel support frames; 200-clamping; 210-a carrier plate; 211-jacking holes; 220-jacking assembly; 230-supporting plate; 240-an alignment assembly; 241-a first reference member; 242-a first alignment drive; 243-a first push plate; 244-a second fiducial; 244 a-a viewing aperture; 245-a second alignment drive; 246-second push plate; 300-a first drive assembly; 310-Y direction linear driving member; 320-sliding the table; 400-a second drive assembly; 410-a portal frame; 420-X direction linear driving piece; 430-Z linear drive; 500-welding head.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment provides a welding device, as shown in fig. 1-3, comprising a base 100, a fixture 200, a first driving assembly 300 and a second driving assembly 400, wherein the fixture 200 comprises a limiting mechanism and a carrier plate 210 provided with a jacking hole 211, the limiting mechanism comprises a jacking assembly 220 arranged at the bottom of the carrier plate 210 and a supporting plate 230 arranged at the jacking end of the jacking assembly 220, and the supporting plate 230 is matched with the jacking hole 211 and is used for carrying a piece 10 to be welded; the limiting mechanism further comprises an alignment assembly 240 arranged at the top of the carrier 210, wherein the alignment assembly 240 is used for aligning the to-be-welded piece 10 positioned on the supporting plate 230; the first driving assembly 300 is disposed on the base 100, and the driving end of the first driving assembly is connected to the carrier 210, for driving the carrier 210 to move; the second driving assembly 400 is disposed on the base 100, and has a welding head 500 at a driving end thereof, for driving the welding head 500 to move so as to perform a welding operation on the workpiece 10 to be welded.

In the welding device provided in this embodiment, initially, the jacking component 220 drives the supporting plate 230 to descend to the lowest position, and the alignment end of the alignment component 240 moves to avoid the avoidance of the supporting plate 230; when in use, the first driving assembly 300 drives the fixture 200 to reach the first setting position through the carrier plate 210, then the lifting assembly 220 lifts the supporting plate 230 to a transmission position higher than the alignment assembly 240 through the lifting hole 211, the transmission assembly then transmits the to-be-welded piece 10 to the supporting plate 230, and then the lifting assembly 220 drives the pushing plate to bear the to-be-welded piece 10 to descend to the alignment position, specifically, the alignment position can be the coplanar arrangement of the top plate of the supporting plate 230 and the top surface of the carrier plate 210; the alignment assembly 240 is then activated and performs an alignment operation on the part to be welded 10 to ensure that the part to be welded 10 is positioned at the pallet 230 with accuracy; the first drive assembly 300 then drives the clip 200 to the welding position. The first driving assembly 300 drives the welding head 500 to move to a welding position and performs a welding operation on the workpiece 10 to be welded; after the welding is completed, the first driving assembly 300 may drive the fixture 200 to the second setting position, the alignment assembly 240 releases the welding piece, the jacking assembly 220 jacks the welding piece to a position higher than the sending position of the alignment assembly 240, and the conveying assembly takes away the welding piece located at the sending position, so as to complete the welding operation of the to-be-welded piece 10.

On the one hand, the alignment component 240 and the jacking component 220 of the fixture 200 are respectively located at the top and the top of the carrier 210, the carrier 210 located in the middle area is connected to the driving end of the first driving component 300, and when the first driving component 300 drives the fixture 200, the driving force is directly applied to the carrier 210, the distances between the jacking component 220 and the alignment component 240 and the carrier 210 are smaller, the synchronous mobility with the carrier 210 is higher, correspondingly, the synchronous mobility between the push plate located at the alignment position and the to-be-welded part 10 and the carrier 210 carried on the push plate is higher, so that the shaking offset of the jacking component 220, the alignment component 240, the supporting plate 230 and the to-be-welded part 10 in the moving process of the fixture 200 is effectively reduced, the position accuracy of the to-be-welded part 10 in the welding position is correspondingly improved, the welding position accuracy of the welding head 500 is further improved, and the effectiveness of the to-be-welded part 10 is ensured.

On the other hand, when the first driving assembly 300 drives the empty fixture 200 to move, the supporting plate 230 is located at the lowest position under the driving of the jacking assembly 220, so that the gravity center of the whole fixture 200 is lowered, the stability of the whole fixture 200 in the moving process is further improved, the shaking offset of each assembly is reduced, and the position accuracy of the fixture 200 for bearing the to-be-welded piece 10 is ensured; similarly, the first driving assembly 300 drives the fixture 200 carrying the workpiece 10 to be welded to move, the supporting plate 230 descends to a welding position similar to the coplanarity of the supporting plate 210, so that the gravity center of the whole fixture 200 can be lowered, the shaking offset of each assembly and the workpiece 10 to be welded in the moving process is reduced, the position accuracy of the workpiece 10 to be welded is further improved, the welding position accuracy of the welding head 500 on the workpiece 10 to be welded is further ensured, and the welding effectiveness is ensured.

In still another aspect, when the workpiece 10 is fed into the fixture 200 and the workpiece is fed out of the fixture 200, the lifting assembly 220 can lift the pallet 230 to a position higher than the alignment assembly 240 as a conveying position and a feeding position, so that interference generated by the conveying assembly with the alignment assembly 240 when the conveying assembly feeds the workpiece 10 into the workpiece 10 and feeds the workpiece out of the workpiece is reduced, normal conveying of the workpiece 10 and the workpiece is ensured correspondingly, and limitation of the arrangement position of the alignment assembly 240 is reduced.

Optionally, in this embodiment, as shown in fig. 5, the alignment assembly 240 includes a first reference member 241, a first alignment driving member 242, a second reference member 244 and a second alignment driving member 245 disposed on the top surface of the carrier 210, where a first push plate 243 is connected to a driving end of the first alignment driving member 242, the first push plate 243 and the first reference member 241 are located on opposite sides of the jacking hole 211 along the first direction, and the first alignment driving member 242 is used for driving the first push plate 243 to move toward or away from the first reference member 241; the driving end of the second alignment driving member 245 is connected with a second push plate 246, the second push plate 246 and the second reference member 244 are positioned at two opposite sides of the jacking hole 211 along the second direction, and the second alignment driving member 245 is used for driving the second push plate 246 to move towards or away from the second reference member 244; wherein the second direction is perpendicular to the first direction.

After the jacking component 220 drives the supporting plate 230 to bear the to-be-welded piece 10 to reach the alignment position, the height of the to-be-welded piece 10 corresponds to the alignment areas of the first reference piece 241, the second reference piece 244, the first pushing plate 243 and the second pushing plate 246, and the first alignment driving piece 242 drives the first pushing plate 243 to move towards the first reference piece 241 along with the first alignment driving piece 242 until the first reference piece 241 and the second reference piece 244 clamp the to-be-welded piece 10 in the first direction; the second alignment driving member 245 drives the second push plate 246 to move toward the second reference member 244 accordingly until both clamp the workpiece 10 to be welded in the second direction, thereby completing the alignment operation of the workpiece 10 to be welded in the four directions.

In this embodiment, as shown in fig. 5, there are two jacking holes 211, two sets of limiting mechanisms, and two sets of limiting mechanisms are in one-to-one correspondence with the two jacking holes 211. When the welding fixture is used, two groups of limiting mechanisms can simultaneously bear two to-be-welded pieces 10, in a single welding cycle, the conveying components can simultaneously or sequentially convey the to-be-welded pieces 10 to the conveying positions of the two limiting mechanisms, and the first driving component 300 can simultaneously realize the conveying of the two to-be-welded pieces 10 and the welding pieces through the driving fixture 200; accordingly, the second driving assembly 400 can drive the welding head 500 to sequentially weld the two workpieces 10 to be welded, so that the welding efficiency is improved, and the driving loads of the first driving assembly 300, the second driving assembly 400 and the jacking assembly 220 are reduced.

Specifically, in this embodiment, as shown in fig. 5, two jacking holes 211 are arranged at intervals along the first direction, and a first baffle is disposed between the two jacking holes 211, and the first baffle is used as the first reference member 241 of the two groups of limiting mechanisms at the same time. A single first baffle is disposed between the two jacking holes 211, wherein two side plate surfaces of the first baffle along the first direction are respectively used for aligning the to-be-welded parts 10 on the corresponding side, and then the single first baffle is simultaneously used as the first reference plates of the two aligning assemblies 240, so that the structural simplicity and the assembly convenience of the fixture 200 are improved, the volume of the fixture 200 is correspondingly reduced, and the overall size of the welding device is reduced.

Similarly, in the present embodiment, as shown in fig. 5, the same side of the two jacking holes 211 along the second direction is provided with a second baffle plate, which simultaneously serves as the second reference member 244 of the two sets of positioning mechanisms. The arrangement of a single second baffle plate as the second reference member 244 of the two sets of positioning mechanisms can further improve the structural simplicity and assembly convenience of the fixture 200 on the basis of realizing alignment of the two workpieces 10 to be welded, and correspondingly further reduce the sizes and occupied spaces of the fixture 200 and the welding device.

In this embodiment, as shown in fig. 5, the second alignment driving members 245 of the two sets of limiting mechanisms are respectively located at two sides of the first baffle and are fixedly connected to the first baffle. The first baffle extends along the second direction, the second baffle extends along the first direction, and the area of the first baffle, which is away from the second baffle and extends out of the jacking hole 211, can be used as a mounting area to fix the two second alignment driving pieces 245, so that the functionality of the first baffle is improved, and the structural simplicity of the fixture 200 is further improved.

Alternatively, in the present embodiment, as shown in fig. 5, the areas of the second baffle corresponding to the two jacking holes 211 are provided with the observation holes 244a. During the welding process, an operator can observe the orientation of the workpiece 10 to be welded and the operation of the supporting plate 230 and the alignment assembly 240 through the observation hole 244a, so that the monitoring of the operation of the fixture 200 is improved, and the normal operation of the fixture is ensured.

Specifically, in this embodiment, as shown in fig. 1 and 4, the first driving assembly 300 includes a Y-direction linear driving member 310 disposed on the base 100 and two sliding tables 320 extending along the Y-direction and arranged at intervals along the X-direction, and two ends of the carrier 210 along the X-direction are correspondingly slidably connected to the two sliding tables 320 one by one; the driving end of the Y-direction linear driving member 310 is connected to the carrier 210. In one specific form of the first driving assembly 300, when in use, the Y-direction linear driving member 310 drives the carrier 210 to slide along the sliding table 320, wherein the sliding table 320 can perform a guiding and limiting function on the movement of the carrier 210, so as to improve the accuracy of the movement positions of the carrier 210 and the fixture 200; in addition, both ends of the carrier 210 are supported by the sliding table 320, so that stability is higher, and accordingly, bearing stability of the to-be-welded piece 10 can be further ensured.

In this embodiment, as shown in fig. 1, 2 and 4, two first driving assemblies 300 are provided, and two opposite sides of the two first driving assemblies 300 share the same sliding platform 320; the number of clamps 200 is also two corresponding to the first drive assembly 300. On the one hand, the two first driving assemblies 300 can drive the two clamps 200, and in a single welding cycle, the welding treatment of the four workpieces 10 to be welded can be realized, so that the welding efficiency of the welding device is further improved; on the other hand, the two first driving assemblies 300 share one sliding connection platform 320, that is, three sliding connection platforms 320 are arranged on the base 100 at intervals along the X direction, and one sliding connection platform 320 in the middle can simultaneously slide with two clamps 200, so that on the basis of realizing guiding and limiting of the two clamps 200, the structural simplicity of the welding device can be further improved, and the space occupation of the welding device is correspondingly further reduced.

Alternatively, in the present embodiment, as shown in fig. 1 and 4, the region of the base 100 between the two sliding tables 320 is sunk to form the accommodating space 110, and the accommodating space 110 is used to accommodate the lower region of the jig 200. The lower region of the jacking assembly 220 can be accommodated in the accommodating space 110 by forming a groove downwards in the region of the base 100 between the two sliding contact platforms 320, and on the basis of ensuring smooth movement of the clamp 200 relative to the base 100 along the Y direction, the gravity center of the clamp 200 can be further reduced, and accordingly, the movement stability of the clamp 200 is further improved, and the stability and the position accuracy of the clamp 200 for carrying the to-be-welded part 10 are further improved.

In this embodiment, the welding apparatus further includes a controller and a manipulator for conveying the workpiece 10 to be welded, where the manipulator, the jacking assembly 220, the alignment assembly 240, the first driving assembly 300 and the second driving assembly 400 are all connected to the controller. The manipulator is used as the conveying component to send into the to-be-welded piece 10 and send out the welding piece, and the driving stroke and the driving coordinate of each component can be set in the controller so as to realize the association control among the components, thereby improving the matching efficiency and the driving accuracy among the components, correspondingly further improving the position accuracy of the to-be-welded piece 10 and further improving the welding accuracy of the welding piece.

In particular, the welding device can be used for sealing welding of lithium batteries, i.e. lithium batteries as the pieces to be welded 10; the bottom of the base 100 may be provided with a stronger steel support 120 to ensure stable support of the base 100 to the components.

Specifically, in the present embodiment, as shown in fig. 1-3, the second driving assembly 400 includes a gantry 410, an X-direction linear driving member 420 disposed on the gantry 410, and a Z-direction linear driving member 430 disposed on the driving end of the X-direction linear driving member 420, and the welding head 500 is connected to the driving end of the Z-direction linear driving member 430. The X-direction linear driving member 420 can drive the Z-direction linear driving member 430 to reciprocate along the X-direction, and the Z-direction linear driving member 430 can drive the welding head 500 to lift along the Z-direction, so as to drive the welding head 500 in the X-Z direction by the second driving assembly 400, and then the second driving assembly 400 and the first driving assembly 300 cooperate to realize the cooperation welding of the welding head 500 and the workpiece 10 to be welded in the X-Y-Z direction.

Specifically, the X-direction linear driving member 420 and the Y-direction linear driving member 310 may each be a linear motor, and the Z-direction linear driving member 430 may be a screw mechanism.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A welding device, comprising:

a base (100);

The fixture (200) comprises a limiting mechanism and a carrier plate (210) provided with a jacking hole (211), wherein the limiting mechanism comprises a jacking component (220) arranged at the bottom of the carrier plate (210) and a supporting plate (230) arranged at the jacking end of the jacking component (220), and the supporting plate (230) is matched with the jacking hole (211) and used for bearing a piece (10) to be welded; the limiting mechanism further comprises an alignment assembly (240) arranged at the top of the carrier plate (210), and the alignment assembly (240) is used for aligning a piece (10) to be welded positioned on the supporting plate (230);

The first driving assembly (300) is arranged on the base station (100), and the driving end of the first driving assembly is connected to the carrier plate (210) and is used for driving the carrier plate (210) to move; and

And the second driving assembly (400) is arranged on the base (100), and the driving end of the second driving assembly is provided with a welding head (500) for driving the welding head (500) to move so as to weld the workpiece (10).

2. The welding device according to claim 1, wherein the alignment assembly (240) comprises a base plate (210) provided on a top surface thereof:

A first reference member (241);

The first alignment driving piece (242) is connected with a first push plate (243), the first push plate (243) and the first reference piece (241) are positioned on two opposite sides of the jacking hole (211) along the first direction, and the first alignment driving piece (242) is used for driving the first push plate (243) to move towards or away from the first reference piece (241);

A second datum (244);

A second alignment driving piece (245), the driving end is connected with a second push plate (246), the second push plate (246) and the second reference piece (244) are positioned at two opposite sides of the jacking hole (211) along a second direction, and the second alignment driving piece (245) is used for driving the second push plate (246) to move towards or away from the second reference piece (244); wherein the second direction is perpendicular to the first direction.

3. The welding device according to claim 2, wherein the number of the jacking holes (211) is two, the number of the limiting mechanisms is two, and the two limiting mechanisms are in one-to-one correspondence with the two jacking holes (211).

4. A welding device according to claim 3, characterized in that two of said jacking holes (211) are arranged at intervals along a first direction, a first baffle being arranged between two of said jacking holes (211), said first baffle being simultaneously used as a first reference element (241) of two sets of said limiting means;

And a second baffle plate is arranged on the same side of the two jacking holes (211) along the second direction, and the second baffle plate is simultaneously used as second reference pieces (244) of the two groups of limiting mechanisms.

5. The welding device according to claim 4, wherein the second alignment driving members (245) of the two sets of limiting mechanisms are respectively located at two sides of the first baffle plate and are fixedly connected to the first baffle plate.

6. Welding device according to claim 5, characterized in that the areas of the second baffle plate corresponding to the two jacking holes (211) are provided with viewing holes (244 a).

7. The welding device according to any one of claims 1 to 6, wherein the first driving assembly (300) comprises a Y-direction linear driving member (310) arranged on the base (100) and two sliding connection platforms (320) extending along the Y-direction and arranged at intervals along the X-direction, and two ends of the carrier plate (210) along the X-direction are in sliding connection with the two sliding connection platforms (320) in a one-to-one correspondence; the driving end of the Y-direction linear driving piece (310) is connected to the carrier plate (210).

8. The welding device according to claim 7, characterized in that the area of the base (100) between the two sliding contact platforms (320) is sunk to form a receiving space (110), the receiving space (110) being intended to receive a lower area of the clamp (200).

9. The welding device according to claim 7, wherein the number of first driving assemblies (300) is two, and two opposite sides of the first driving assemblies (300) share the same sliding table (320); the number of the clamps (200) is two corresponding to the number of the first driving assemblies (300).

10. The welding device of any of claims 1-6, further comprising a controller and a robot for transporting the part (10) to be welded, wherein the robot, the jacking assembly (220), the alignment assembly (240), the first drive assembly (300) and the second drive assembly (400) are all connected to the controller.