CN217618672U

CN217618672U - Welding jig and sealed nail welding set

Info

Publication number: CN217618672U
Application number: CN202220417312.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Guangdong Lyric Robot Automation Co Ltd
Current assignee: Guangdong Lyric Robot Automation Co Ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-21
Anticipated expiration: 2032-06-10

Abstract

The application discloses a welding fixture and a sealing nail welding device, and relates to the technical field of production equipment; comprises a mounting plate; the bearing assembly is arranged on the mounting plate and bears the material; the first positioning assembly is arranged on the mounting plate and clamps the material along a first direction; the second positioning assembly is arranged on the mounting plate and clamps the material along a second direction; the bearing assembly comprises a bearing plate arranged on the mounting plate; a first elastic component is arranged between the bearing plate and the mounting plate; by adopting the technical scheme provided by the application, the technical problems that the height consistency cannot be ensured and the welding quality is influenced during production due to the tolerance of materials are solved.

Description

Welding jig and sealed nail welding set

Technical Field

The application relates to the technical field of production equipment, in particular to a welding fixture and a sealing nail welding device.

Background

In the production process, a certain production tolerance exists between materials, which is an unavoidable problem in production and brings certain influence on subsequent production; for example, in the welding process, due to the tolerance between materials, the products may not be at the same height when being welded, thereby affecting the welding quality and the production consistency.

SUMMERY OF THE UTILITY MODEL

This application aim at provides a sealed nail welding set, adopts the technical scheme that this application provided to solve because the material has the tolerance, can't guarantee highly uniform when leading to producing, influences welding quality's technical problem.

In order to solve the technical problem, the application provides a welding fixture and a sealing nail welding device, and in a first aspect, the application provides a welding fixture which comprises an installation plate;

the bearing assembly is arranged on the mounting plate and bears the material;

the first positioning assembly is arranged on the mounting plate and clamps the material along a first direction;

the second positioning assembly is arranged on the mounting plate and clamps the material along a second direction;

the bearing assembly comprises a bearing plate arranged on the mounting plate;

a first elastic component is arranged between the bearing plate and the mounting plate

In the implementation process, the material is placed on the bearing component, and the bearing component bears the material; then the first positioning assembly and the second positioning assembly clamp the material from the first direction and the second direction respectively, so that the deviation rectification positioning of the material in the first direction and the second direction is realized, and meanwhile, the material is ensured to be stable and convenient for subsequent welding; in addition, when the material was placed on the loading board, first elastic component's setting can make the material play a self-adaptation regulating action when being compressed tightly, if when having certain deviation on meeting some material specifications, then can compensate this deviation through first elastic component, guarantees that the material homoenergetic is in same level and accomplishes the welding, guarantees welding uniformity and welding precision.

Preferably, the first positioning assembly includes a first clamping plate and a second clamping plate, and a first driving group for driving the first clamping plate and the second clamping plate to approach or separate from each other along a first direction;

at least one clamping plate of the first clamping plate and the second clamping plate is connected with the first driving group;

in the implementation process, the first clamping plate and the second clamping plate are close to each other to clamp the material and are far away from each other to realize unclamping; and first splint are connected first drive group with at least splint of second splint, can have one of them splint to be fixed setting, are close to the centre gripping of realization to the material towards this fixed splint through another splint, also can first drive group all be connected to two splint, and the centre gripping is accomplished in the motion in opposite directions.

Preferably, the second positioning assembly comprises a third clamping plate and a fourth clamping plate, and a second driving group for driving the third clamping plate and the fourth clamping plate to approach or move away from each other along the second direction;

at least one clamping plate of the third clamping plate and the fourth clamping plate is connected with the second driving group;

in the implementation process, the third clamping plate and the fourth clamping plate are close to each other in the second direction to clamp the material, and are far away from each other to realize unclamping; and third splint are connected first drive group with the at least splint of fourth splint, can have one of them splint to be fixed setting, are close to the centre gripping of realization to the material towards this fixed splint through another splint, also can all connect the second drive group by two splint, and the centre gripping is accomplished in the motion in opposite directions.

In a second aspect, the present application provides a seal nail welding apparatus, comprising a frame

The pressing mechanism is arranged on the rack and comprises a pressing plate, and the pressing plate presses the sealing nail and the material in a third direction;

the welding mechanism is arranged on the rack and used for welding the sealing nail and the material;

and any of the above-described welding jigs;

in the implementation process, the material to be welded is placed on a welding fixture, and a sealing nail is assembled on the material to be welded; the welding fixture clamps and fixes the materials along the first direction and the second direction, positions and rectifies the materials, and simultaneously fixes the materials, so that the accuracy of the positions of the materials is ensured, the welding precision is improved, and the stability of the welding is ensured; the first direction and the second direction may be understood as horizontal directions; after the materials are positioned in the horizontal direction, the pressing mechanism acts on the materials and the sealing nails, the pressing mechanism realizes the positioning of the materials and the sealing nails in the third direction, simultaneously ensures the connection stability of the sealing nails between the materials, and further ensures the welding precision of the subsequent sealing nails welded on the materials; after the materials and the sealing nails are positioned, the welding mechanism realizes welding.

Preferably, the pressing mechanism further comprises

The third driving group is arranged on the rack; the pressing plate is arranged at the driving end of the third driving group, and the third driving group drives the pressing plate to move along a third direction;

the sealing nail pressing component is arranged on the pressing plate and used for pressing the sealing nails;

in the implementation process, the third driving group drives the pressing plate to be close to the material along the third direction and to be pressed on the material; the sealing nail pressing assembly is arranged on the pressing plate and used for pressing the sealing nail and ensuring the connection stability between the sealing nail and the material.

Preferably, the pressure plate is provided with a clearance hole;

the seal nail pressing component comprises a two-axis driving group and a pressing module arranged at the driving end of the two-axis driving group;

the two-axis driving group drives the compaction module to move along a first direction and a third direction and is close to or far away from the clearance hole;

in the implementation process, the clearance hole on the pressure plate can be penetrated by laser, so that the welding of the sealing nail can be facilitated; during welding, the sealing module acts on the sealing nail, and at the moment, laser can finish spot welding of the sealing nail firstly and keep away from the position where the sealing module acts; after the sealed nail is spot-welded, the sealed module is kept away from the clearance hole under the effect of two-axis drive group again, and the sealed nail is because of having accomplished spot welding this moment, so and the material between form the state of preliminary stable connection, leave the back at sealed module, then can accomplish the full welding process of sealed nail.

Preferably, the pressing module comprises a connecting rod, a pressing piece and a second elastic component;

the connecting rod is arranged at the driving end of the two-axis driving group; the second elastic assembly and the pressing piece are arranged on the connecting rod, and the second elastic assembly drives the pressing piece to reset along a third direction;

in the implementation process, the second elastic component can realize self-adaptation of the pressing piece, so that overpressure or insufficient pressure of the pressing piece on the sealing nail can be avoided, and poor welding phenomena such as insufficient welding and the like caused by the overpressure or insufficient pressure can be avoided.

Preferably, the welding jig comprises at least one group;

in the implementation process, the welding fixture can be provided with a plurality of groups of materials, so that a plurality of groups of materials can be assembled at one time, the welding of the plurality of groups of materials and the sealing nail can be realized at one time, and the welding efficiency is improved.

Preferably, the device also comprises a detection mechanism arranged on the rack;

in the implementation process, the detection mechanism can be used for detecting the assembly condition of the sealing nail before welding, the welding condition of the welding spot after spot welding, the welding quality after completing all welding and the like.

Preferably, the device further comprises a first transfer driving group;

the welding fixture is arranged at the driving end of the first transfer driving group, and the first transfer driving group drives the welding fixture to move along a first direction;

in the implementation process, the first transfer driving set can drive the welding fixture to move along the first direction, so that the welding fixture can be flexibly transferred, staggered clearance avoidance is facilitated to carry out feeding and discharging, and meanwhile, the materials can be cooperatively switched when being welded by a plurality of groups of materials.

Compared with the prior art, the beneficial effect of this application lies in: this application realizes the location of material through first locating component and second locating component, and the first elastic component of carrier assembly cooperation makes the material can play a self-adaptation regulation effect when receiving to compress tightly the effect to can make the height that the material was fixed a position keep unanimous, thereby guarantee follow-up production uniformity, guarantee welding quality.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of the overall structure of one embodiment of the present application;

FIG. 2 is an enlarged schematic view of the structure of portion A in FIG. 1;

FIG. 3 is a schematic structural diagram of a welding fixture according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a welding fixture according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a welding fixture according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a hold-down mechanism according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a hold-down mechanism according to an embodiment of the present application;

fig. 8 is an enlarged schematic view of the structure of part B in fig. 7.

Wherein: 10. a frame; 11. a first transfer drive group; 20. welding a clamp; 21. mounting a plate; 22. a load bearing assembly; 221. a first elastic member; 222. a guide bar; 223. a carrier plate; 23. a first positioning assembly; 231. a first splint; 232. a second splint; 233. a first drive group; 24. a second positioning assembly; 241. a third splint; 242. a fourth splint; 243. a second drive group; 30. a pressing mechanism; 31. pressing a plate; 311. an empty avoiding groove; 32. avoiding a void; 33. a third drive group; 34. a seal pin compression assembly; 341. a two-axis drive group; 342. a compression module; 3421. a connecting rod; 3422. a second elastic member; 3423. a pressing member; 40. a welding mechanism; 50. a detection mechanism; 51. a three-axis drive group;

c1, a first direction; c2, a second direction; c3, third direction.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the application. That is, in some embodiments of the present application, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings for the sake of simplicity.

It should be noted that all the directional indicators in the embodiments of the present application, such as up, down, left, right, front, and back, 8230, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are used for descriptive purposes only, are not specifically intended to be in an orderly or sequential sense, and are not intended to limit the present application, but are merely used for distinguishing components or operations described in the same technical terms, and are not intended to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

For further understanding of the contents, features and functions of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings and the following detailed description:

examples

In the production process, certain production tolerance exists between materials, which is an inevitable problem in production and brings certain influence on subsequent production; for example, in the welding process, due to the tolerance between materials, the products are not at the same height during welding, so that the welding quality and the production consistency are influenced;

in order to solve the above technical problem, the present embodiment provides the following technical solutions:

referring to fig. 1-8, an embodiment of a welding fixture includes a mounting plate 21, a carrying assembly 22, a first positioning assembly 23, and a second positioning assembly 24;

further, the bearing assembly 22 is arranged on the mounting plate 21 and bears the material;

specifically, the first positioning assembly 23 and the second positioning assembly 24 are both disposed on the mounting plate 21, and clamp the material along the first direction and the second direction, respectively.

In the above solution, the material is placed on the bearing component 22, and the bearing component 22 holds the material; first locating component 23 and second locating component 24 follow first direction and second direction centre gripping material respectively afterwards, realize the material in the ascending location of rectifying in first direction and second direction, guarantee simultaneously that the material keeps stable, the follow-up welding of being convenient for.

In welding process, hold-down mechanism 30 acts on the material, because the material has certain production deviation, physical height between the different materials probably has certain difference, and hold-down mechanism 30 generally adopts general actuating mechanism to drive the time unable effectual this deviation of carrying out the adaptability adjustment, consequently probably causes certain damage to the material, in order to solve this technical problem, this embodiment provides following technical scheme:

specifically, referring to fig. 5, the supporting assembly 22 includes a supporting plate 223 disposed on the mounting plate 21;

further, a first elastic component 221 is arranged between the bearing plate 223 and the mounting plate 21;

in the above scheme, the material is placed on the bearing plate 223, and is matched with the pressing mechanism 30 to position and clamp the material in the third direction; the arrangement of the first elastic component 221 can enable the materials to have a self-adaptive adjustment effect when being compressed, the deviation can be compensated through the first elastic component 221, the materials can be guaranteed to be located at the same horizontal height to complete welding, and welding consistency and welding precision are guaranteed.

Further, in order to further ensure the stability of the adjustment process of the bearing plate 223, the present embodiment provides the following technical solution:

specifically, a guide rod is arranged between the bearing plate 223 and the mounting plate, and the guide rod can guide the action of the bearing plate 223, so that the stability of the action process of the bearing plate 223 is ensured.

Specifically, the first positioning assembly 23 includes a first clamping plate 231 and a second clamping plate 232, and a first driving group 233 driving the first clamping plate 231 and the second clamping plate 232 to approach or move away from each other in a first direction;

further, at least one of the first clamping plate 231 and the second clamping plate 232 is connected to the first driving unit 233;

in the above scheme, the first clamping plate 231 and the second clamping plate 232 are close to each other to clamp the material, and are far away from each other to realize unclamping; and first splint 231 is connected first drive group 233 with at least one splint of second splint 232, can have one of them splint to be fixed the setting, is close to the centre gripping that realizes the material towards this fixed splint through another splint, also can first drive group 233 is all connected to two splint, and the centre gripping is accomplished in the motion in opposite directions.

Specifically, the second positioning assembly 24 includes a third clamping plate 241 and a fourth clamping plate 242, and a second driving group 243 for driving the third clamping plate 241 and the fourth clamping plate 242 to approach or move away from each other along the second direction;

further, at least one of the third clamping plate 241 and the fourth clamping plate 242 is connected with the second driving group 243;

in the above scheme, the third clamping plate 241 and the fourth clamping plate 242 are close to each other in the second direction to clamp the material, and are far away from each other to realize unclamping; and third splint 241 and fourth splint 242 at least one splint are connected first drive group 233, can have one of them splint to be fixed setting, and the splint that should fix through another splint orientation is close to the centre gripping that realizes the material, also can two splint all connect second drive group 243, and the centre gripping is accomplished in the motion in opposite directions.

Further, the welding jig 20 includes at least one set; welding jig 20 can set up the multiunit promptly to can once only assemble multiunit material, thereby can once realize the welding of multiunit material and sealed nail, promote welding efficiency.

Further, referring to fig. 3, taking two sets of positioning fixtures as an example, the two sets of positioning fixtures may be disposed adjacently and share a set of fixed first clamping plate 231, so that when a plurality of sets of fixtures are added, compactness between structures is ensured, space is saved, and space utilization is improved.

Specifically, referring to fig. 1, the present embodiment further provides a sealing nail welding apparatus, which includes a frame 10, a welding fixture 20, a pressing mechanism 30, and a welding mechanism 40;

specifically, the pressing mechanism 30 is disposed on the frame 10 and includes a pressing plate 31, and the pressing plate 31 presses the sealing nail and the material in the third direction;

it should be noted that, in some embodiments, the material may be understood as a cell top cover, and the sealing nail is assembled on the cell top cover;

specifically, the welding structure is arranged on the frame 10 and used for welding the sealing nail and the material;

further, a three-axis driving set 51 is disposed on the frame 10, and the three-axis driving set 51 is connected to the welding mechanism 40 and drives the welding mechanism 40 to move along the first direction, the second direction and the third direction;

in some embodiments, the first direction and the second direction may be horizontal directions, the third direction may be vertical directions, and the first direction, the second direction and the third direction are perpendicular to each other two by two.

In the scheme, the material to be welded is placed on the welding fixture 20, and the sealing nails are assembled on the material and wait for welding; the welding fixture 20 clamps and fixes the materials along the first direction and the second direction, positions and rectifies the materials, fixes the materials at the same time, ensures the accuracy of the material position, improves the welding precision, and ensures the stability of the welding; the first direction and the second direction may be understood as horizontal directions; after the materials are positioned in the horizontal direction, the pressing mechanism 30 acts on the materials and the sealing nails, the pressing mechanism 30 realizes the positioning of the materials and the sealing nails in the third direction, simultaneously ensures the connection stability of the sealing nails between the materials, and further ensures the welding precision of the subsequent sealing nails welded on the materials; after the materials and the sealing nails are positioned, the welding mechanism 40 realizes welding.

Specifically, referring to FIGS. 3-5, a welding fixture 20

Specifically, referring to fig. 1, the transfer device further includes a first transfer driving group 11;

further, the welding fixture 20 is arranged at the driving end of the first transfer driving group 11, and the first transfer driving group 11 drives the welding fixture 20 to move along the first direction;

in the above scheme, the first transfer driving unit 11 can drive the welding fixture 20 to move along the first direction, so that the welding fixture 20 can be flexibly transferred, the staggered clearance is facilitated for loading and unloading, and meanwhile, the matching switching can be performed when multiple groups of materials are welded.

In particular, a detection mechanism 50 is further included, and in some embodiments, the detection mechanism 50 is connected to a three-axis driving group 51; the detection mechanism 50 can be used for detecting the assembly position of the sealing nail before welding, and the accuracy of the position before welding is ensured; meanwhile, the welding condition after welding can be detected, and the product quality of the product is ensured.

It should be noted that the specific structure of the welding mechanism 40 belongs to a mature technology, and therefore, the detailed description thereof is omitted here.

Specifically, referring to fig. 6-8, the clamping mechanism 30 further includes a third drive group 33 and a seal pin clamping assembly 34;

further, the third driving group 33 is disposed on the frame 10; the pressing plate 31 is arranged at the driving end of the third driving group 33, and the third driving group 33 drives the pressing plate 31 to move along the third direction;

further, a seal nail pressing assembly 34 is arranged on the pressing plate 31 and used for pressing the seal nails;

in the scheme, the third driving group 33 drives the pressing plates 31 to press the materials close to the materials along the third direction; the sealing nail pressing assembly 34 is arranged on the pressing plate 31 and used for pressing the sealing nails, and connection stability between the sealing nails and materials is guaranteed.

Specifically, referring to fig. 1-2, a clearance hole 32 is formed on the pressing plate 31;

further, the seal nail pressing assembly 34 includes a two-axis driving group 341 and a pressing module 342 disposed at a driving end of the two-axis driving group 341;

further, the two-axis driving unit 341 drives the pressing module 342 to move along the first direction and the third direction, and to approach or move away from the clearance hole 32;

in the above solution, the clearance hole 32 on the pressure plate 31 is provided for the laser to pass through, thereby facilitating the welding of the seal nail; during welding, the sealing module acts on the sealing nail, and at the moment, laser can finish spot welding of the sealing nail firstly and keep away from the position where the sealing module acts; after the sealed nail finishes spot welding, the sealed module keeps away from clearance hole 32 under the effect of two-axis drive group 341 again, and the sealed nail is because of having accomplished spot welding this moment, so and the material between form the state of preliminary stable connection, leave at sealed module, then can accomplish the full welding process of sealed nail.

Furthermore, the spot welding only carries out welding of some point positions on the piece to be welded, and the preliminary stable connection between the sealing nail and the material is realized through welding of some point positions; and full welding refers to the comprehensive welding of the sealing nail and the material, namely the welding of all the points to be welded is realized.

Further, referring to fig. 7-8, the pressing module 342 includes a connecting rod 3421, a pressing member 3423 and a second elastic component 3422;

specifically, the connecting rod 3421 is disposed at the driving end of the two-axis driving group 341; the second elastic component 3422 and the pressing component 3423 are disposed on the connecting rod 3421, and the elastic component drives the pressing component 3423 to return along the third direction;

in the above solution, the second elastic component 3422 is configured to realize self-adaptation of the pressing component 3423, so as to avoid overpressure or improper press-fitting of the pressing component 3423 on the seal nail, thereby avoiding poor welding phenomena such as cold joint and explosion caused by the overpressure or improper press-fitting.

Specifically, referring to fig. 8, in order to facilitate the action of the pressing module 342, a corresponding clearance groove 311 is formed on the pressing plate 31 for clearance of the pressing module 342.

Further, the setting of cooperation welding jig 20, hold-down mechanism 30 also can make corresponding adjustment, if when welding jig 20 set up to two sets of, it can adopt same clamp plate 31 to compress tightly, only needs will keep away the adjustment that empty hole 32 carried out correspondence on clamp plate 31, and sealed nail compresses tightly subassembly 34 and also can correspond the setting according to the quantity of required processing material.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present application are intended to be included within the scope of the present application.

Claims

1. A welding jig which characterized in that: comprises a mounting plate (21);

the bearing assembly (22) is arranged on the mounting plate (21) and bears materials;

the first positioning component (23) is arranged on the mounting plate (21) and clamps the material along a first direction;

the second positioning assembly (24) is arranged on the mounting plate (21) and clamps the material along a second direction;

the bearing component (22) comprises a bearing plate (223) arranged on the mounting plate (21);

a first elastic component (221) is arranged between the bearing plate (223) and the mounting plate (21).

2. The welding jig of claim 1, wherein: the first positioning assembly (23) includes a first clamping plate (231) and a second clamping plate (232), and a first driving group (233) which drives the first clamping plate (231) and the second clamping plate (232) to approach or move away from each other along a first direction;

the first clamping plate (231) and the second clamping plate (232) are connected with the first driving group (233) by at least one clamping plate.

3. The welding jig of claim 1, wherein: the second positioning assembly (24) comprises a third clamping plate (241) and a fourth clamping plate (242), and a second driving group (243) for driving the third clamping plate (241) and the fourth clamping plate (242) to approach or depart from each other along a second direction;

at least one of the third clamping plate (241) and the fourth clamping plate (242) is connected with the second driving group (243).

4. The utility model provides a sealed nail welding set which characterized in that: comprises a frame (10)

The pressing mechanism (30) is arranged on the rack (10) and comprises a pressing plate (31), and the pressing plate (31) presses the sealing nails and the materials in a third direction;

the welding mechanism (40) is arranged on the rack (10) and is used for welding the sealing nails and the materials;

and a welding fixture as claimed in any one of claims 1 to 3.

5. The seal nail welding apparatus according to claim 4, wherein: the pressing mechanism (30) also comprises

The third driving group (33) is arranged on the rack (10); the pressing plate (31) is arranged at the driving end of the third driving group (33), and the third driving group (33) drives the pressing plate (31) to move along a third direction;

and the sealing nail pressing component (34) is arranged on the pressure plate (31) and is used for pressing the sealing nails.

6. The seal nail welding apparatus according to claim 5, wherein: a clearance hole (32) is formed in the pressing plate (31);

the seal nail pressing assembly (34) comprises a two-axis driving group (341) and a pressing module (342) arranged at the driving end of the two-axis driving group (341);

the two-axis driving group (341) drives the compaction module (342) to move along the first direction and the third direction and to approach or depart from the clearance hole (32).

7. The seal nail welding apparatus according to claim 6, wherein: the pressing module (342) comprises a connecting rod (3421), a pressing piece (3423) and a second elastic component (3422);

the connecting rod (3421) is arranged at the driving end of the two-axis driving group (341); the second elastic component (3422) and the compressing component (3423) are arranged on the connecting rod (3421), and the second elastic component (3422) drives the compressing component (3423) to reset along a third direction.

8. The seal nail welding apparatus according to claim 4, wherein: the welding jig (20) includes at least one set.

9. The seal nail welding apparatus according to claim 4, wherein: the device also comprises a detection mechanism (50) arranged on the machine frame (10).

10. The seal nail welding apparatus according to claim 4, wherein: further comprising a first transfer drive group (11);

the welding fixture (20) is arranged at the driving end of the first transfer driving group (11), and the first transfer driving group (11) drives the welding fixture (20) to move along a first direction.