Welding jig and welding equipment

Abstract

The utility model provides a welding jig and welding equipment. The welding jig is used for supporting and positioning in the welding process of double layers of laminated plates, and the plates are placed on the bearing table. The welding jig comprises a supporting piece and an elastic piece. The supporting piece can press the plate to the bearing table. The elastic piece is connected to the supporting piece so that the supporting piece can automatically adjust balance according to the plate, or the elastic piece is used for being connected to the plate so that the plate can automatically adjust balance according to the supporting piece. When the welding jig is used for welding double layers of laminated plates, balance between the supporting piece and the plates can be automatically adjusted, so that the supporting piece can be well attached to the plates, the plates can be better fixed, and displacement of the plates during welding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, and more specifically to a welding jig and welding equipment. Background Art

[0002] The existing battery cover welding mechanism is mainly used to weld the poles and pole pieces of the cover. The welding area is relatively small compared to the cover, and the actual welding process cannot be applied to the large-scale welding of two bare covers. In addition, for thicker single-cell covers, precision stamping is used for forming. For thin battery covers, mold stamping will cause the cover to be too thick in the thickness direction, and the height dimension of the forming step will not meet the requirements. Therefore, double cover welding is required to achieve cover forming and ensure the step size. However, when welding double-layer covers, relative offset may occur between the covers.

[0003] Therefore, it is necessary to provide a welding jig and a welding device to at least partially solve the above problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a welding jig for supporting and positioning a battery cover during welding, comprising:

[0006] A support member, the support member is used to contact the battery cover plate, and the support member can press the battery cover plate tightly, and the support member is used for allowing the laser beam to irradiate the area to be welded of the battery cover plate;

[0007] An elastic member is arranged on a side of the support member away from the battery cover plate, so that the support member can automatically adjust the balance according to the battery cover plate.

[0008] The first aspect of the utility model is a welding jig, which is used for welding double-layered plates. The support member and the plates can automatically adjust the balance so that the support member can fit well with the plates. The support member can better fix the plates to avoid displacement of the plates during welding.

[0009] Optionally, the elastic member is connected to the supporting member, and the elastic member is always in a compressed state.

[0010] Optionally, the elastic member includes:

[0011] A top ball, the top ball abutting against the support member;

[0012] A spring is connected to the top ball and provides elastic force to the top ball so that the top ball always abuts against the support member.

[0013] Optionally, the support member is provided with a welding groove penetrating along the first direction, and the welding groove is used to expose the area to be welded of the plate.

[0014] Optionally, the welding groove is constructed as a gradually expanding groove structure, and the side of the welding groove with a larger opening area is used to face the welding head.

[0015] Optionally, the support member is provided with an air inlet passage communicated with the welding groove, and the air inlet passage is used for allowing an inert gas to pass through.

[0016] Optionally, the welding jig further comprises a mounting seat, the mounting seat is spaced apart from the receiving platform, and the elastic member is connected between the mounting seat and the supporting member so that the supporting member can move relative to the mounting seat.

[0017] Optionally, a guide member is further included, wherein the guide member is connected to the support member, and the guide member and the elastic member extend in the same direction so that the support member can move along the guide member.

[0018] Optionally, the guide member is provided with a limiting portion, and the support member moves between the limiting portion and the mounting seat under the action of the elastic member.

[0019] Optionally, the support member is provided with a guide hole, and the radial dimension of at least part of the guide hole is smaller than the radial dimension of the limiting portion, and the support member is movably connected to the guide member through the guide hole.

[0020] Optionally, the guide member further comprises a main body portion, and a radial dimension of the main body portion is smaller than a radial dimension of the limiting portion;

[0021] The radial dimension of at least part of the guide holes is larger than the radial dimension of the main body, so that the support member can be tilted relative to the mounting seat.

[0022] Optionally, the elastic member is provided in plurality, and the plurality of elastic members are circumferentially spaced around the welding groove; and / or

[0023] The guide members are provided in plurality, and the guide members are arranged circumferentially and spaced apart around the welding groove. A second aspect of the utility model provides a welding device, comprising a frame and the above-mentioned welding fixture, wherein the support member is mounted on the frame.

[0024] The welding equipment provided according to the second aspect of the utility model makes the welding process more precise and stable, which helps to improve the welding quality and efficiency.

[0025] The welding equipment further comprises a laser, and the laser and the welding jig are arranged on the frame at intervals along a height direction.

[0026] Optionally, a plurality of welding jigs are arranged side by side.

[0027] Optionally, a driving member is further included, wherein the driving member is used to drive the welding fixture to move in a height direction; and / or

[0028] The utility model also comprises a moving component, wherein the moving component can drive the laser to move relative to the frame, so that the laser can be focused and leveled. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0030] Figure 1 A three-dimensional schematic diagram of a welding jig according to a preferred embodiment of the present invention;

[0031] Figure 2 It is a top view schematic diagram of the welding fixture;

[0032] Figure 3 For along Figure 2 Schematic diagram of the cross section taken along the midline AA;

[0033] Figure 4 It is a three-dimensional schematic diagram of a cross-section of a welding jig;

[0034] Figure 5 It is a three-dimensional schematic diagram of a cross-section of a welding jig;

[0035] Figure 6 is a three-dimensional schematic diagram of a support member;

[0036] Figure 7 It is a top view schematic diagram of a cross section of a welding jig;

[0037] Figure 8 is a cross-sectional schematic diagram of an elastic member;

[0038] Fig. 9 is a cross-sectional schematic diagram of a guide member;

[0039] Fig.10 It is a three-dimensional schematic diagram of welding equipment;

[0040] Fig.11It is a three-dimensional schematic diagram of the dust removal component and the driving component;

[0041] Fig.12 It is a top view schematic diagram of the dust removal component and the driving component;

[0042] Fig.13 A cross-sectional schematic diagram of the connection between the driving member and the welding fixture;

[0043] Fig.14 It is a three-dimensional schematic diagram of the connection between the driving part and the welding fixture;

[0044] Fig.15 is a three-dimensional schematic diagram of a mobile component;

[0045] Fig.16 for Fig.15 An enlarged schematic diagram of part B in FIG.

[0046] Description of Reference Numerals

[0047] 10: Welding fixture

[0048] 110: Mounting seat

[0049] 111: Installation slot

[0050] 112: Through slot

[0051] 120: Support

[0052] 121: Welding slot

[0053] 122: Guide hole

[0054] 123: Nitrogen channel

[0055] 130: Elastic parts

[0056] 131: Sleeve

[0057] 132: Top bead

[0058] 133: Spring

[0059] 140: Guide

[0060] 141: Steps

[0061] 150: Connector

[0062] 20: Battery cover

[0063] 30: Laser

[0064] 40: Driving parts

[0065] 41: Connecting plate

[0066] 42: Guide shaft

[0067] 43: Oil-free bushing

[0068] 50: Protective Shield

[0069] 51: Sidewall

[0070] 52: Bottom wall

[0071] 60: Mobile Components

[0072] 61: First mounting plate

[0073] 62: Second mounting plate

[0074] 63: Shaft

[0075] 64: Screw

[0076] 65: Fixing parts

[0077] 70: Connecting valve

[0078] 71: Flow meter

[0079] 80: Rack

[0080] DH: Height Direction

[0081] D1: First direction DETAILED DESCRIPTION

[0082] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0083] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0084] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0085] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0086] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0087] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0088] When forming a cover with steps for thin and light batteries, stamping is usually used. Stamping does not meet the height dimension requirements of the forming steps. Therefore, welding is used for the light cover. Welding can connect the light cover according to the design requirements and form a specific structure, thereby ensuring the step size.

[0089] The existing battery cover plate 20 cover plate welding mechanism mainly welds the poles and pole pieces of the cover plate. The welding area is relatively small and thin relative to the cover plate. The actual welding process cannot be applied to the large-scale welding of two layers of bare cover plates. Therefore, this welding structure is designed to be applicable to the welding of two bare cover plates and to adapt to the welding of a large area.

[0090] The utility model provides a welding jig 10, which is used for supporting and positioning during the welding process of double-layered plates, and the plates are placed on a receiving platform (not shown in the figure). In the utility model, the double-layered plate is a battery cover 20. The welding jig 10 includes a support member 120 and an elastic member 130. The support member 120 is used to contact the battery cover 20, and the support member 120 can press the battery cover 20 to the receiving platform. The elastic member 130 is connected to the support member 120 so that the support member 120 can automatically adjust the balance according to the battery cover 20. Or the elastic member 130 is connected to the battery cover 20 so that the battery cover 20 can be leveled according to the support member 120. When the welding jig 10 is used to weld the battery cover 20, the support member 120 and the battery cover 20 can automatically adjust the balance, so that the support member 120 can fit well with the battery cover 20, so that the battery cover 20 can be better fixed to avoid displacement of the battery cover 20 during welding.

[0091] In the present invention, when the elastic member 130 is connected to the battery cover 20, one end of the elastic member 130 is connected to the receiving platform, and the other end of the elastic member 130 is a free end, and the battery cover 20 can be connected to the free end of the elastic member 130. Optionally, the battery cover 20 is in contact with the free end of the elastic member 130.

[0092] In the present invention, the welding methods include but are not limited to laser welding and resistance welding. The welding head of laser welding is a laser 30. The welding head of resistance welding is a welding electrode.

[0093] The following combination Figure 1-Figure 9 , taking the elastic member 130 being connected to the support member 120 as an example and the welding method using laser welding as an example for explanation.

[0094] When the elastic member 130 is connected to the support member 120, the elastic member 130 is in a compressed state, so that the support member 120 can be better tilted at different angles, and the support member 120 can be well fitted with the battery cover 20, ensuring that the laser beam can accurately project to the area to be welded, thereby improving the accuracy and stability of welding.

[0095] In some embodiments of the present invention, the welding jig 10 further includes a mounting seat 110, and the mounting seat 110 is used to mount the support member 120. The mounting seat 110 is disposed on a side of the support member 120 away from the battery cover 20, and the elastic member 130 is respectively connected to the mounting seat 110 and the support member 120, and the elastic member 130 pushes the support member 120 to move in a direction away from the mounting seat 110, so that the support member 120 can move equivalent to the mounting seat 110.

[0096] The mounting seat 110 is provided with a mounting groove 111 extending along the first direction D1, and the support member 120 is movably disposed in the mounting groove 111. In order to ensure the movement of the support member 120, in a plane perpendicular to the first direction D1, the projection of the support member 120 is located within the projection of the mounting groove 111, that is, the projection area of ​​the mounting groove 111 is slightly larger than the projection area of ​​the support member 120.

[0097] The mounting seat 110 is further provided with a through slot 112 extending along the first direction D1. The through slot 112 is connected to the mounting slot 111 and is located inside the mounting slot 111 along the projection of the first direction D1, that is, the projection area of ​​the mounting slot 111 is larger than the projection area of ​​the through slot 112.

[0098] The support member 120 is provided with a welding groove 121 penetrating along the first direction D1. The welding groove 121 is located inside the mounting groove 111 in the projection along the first direction D1, that is, the projection area of ​​the mounting groove 111 is larger than the projection area of ​​the welding groove 121.

[0099] The through slot 112 is connected to the welding slot 121 for allowing the laser beam to be directed to the area to be welded of the battery cover 20 . The laser beam of the laser 30 can pass through the through slot 112 and be directed to the welding slot 121 of the support member 120 .

[0100] like Figure 8As shown, an elastic member 130 is arranged between the mounting seat 110 and the support member 120. The elastic member 130 includes a top ball 132 and a spring 133. The top ball 132 abuts against the support member 120. The spring 133 is connected to the top ball 132 and provides an elastic force to the top ball 132 so that the top ball 132 always abuts against the support member 120. Optionally, the elastic member 130 also includes a sleeve 131. The sleeve 131 is fixedly connected to the mounting seat 110, and the sleeve 131 has a receiving cavity with at least one end open. The top ball 132 is arranged in the receiving cavity, and a part of the top ball 132 extends outside the receiving cavity through the opening and abuts against the support member 120, and the diameter of the top ball 132 is larger than the diameter of the opening. The spring 133 is arranged in the receiving cavity and provides an elastic force to the top ball 132 so that the top ball 132 abuts against the periphery of the opening. The accommodating cavity and the elastic member 130 both extend along the first direction D1, and the opening is arranged at one end of the accommodating cavity along the first direction D1. In the present embodiment, the opening is arranged so that the top bead 132 can abut against the support member 120 to realize the floating of the support member 120 relative to the mounting seat 110. The arrangement of the elastic member 130 can effectively realize the elastic support of the support member 120, so that the support member 120 can automatically adjust the balance according to the battery cover 20. The support member 120 can flexibly adjust its position when subjected to external pressure or the shape of the battery cover 20 changes, and maintain a good contact state with the battery cover 20. In the present embodiment, the arrangement of the spring 133 top bead 132 is adopted, and the contact area between the top bead 132 and the support member 120 is small, which can realize high-precision positioning.

[0101] In some embodiments of the present invention, a plurality of elastic members 130 are provided, and the plurality of elastic members 130 are arranged at intervals in the circumferential direction around the welding groove 121. The circumferentially distributed arrangement of the elastic members 130 can make the elastic force evenly distributed around the welding groove 121, so as to achieve the balance of the force at the contact point between the support member 120 and the mounting seat 110, provide a more uniform supporting force, and facilitate the realization of all-round and balanced support for the support member 120, further improving the stability and reliability of the welding jig 10. It can also better maintain the good contact state between the support member 120 and the battery cover plate 20.

[0102] In some embodiments of the present invention, the support member 120 is provided with a guide hole 122. The guide hole 122 extends along the first direction D1. The welding jig 10 also includes a guide member 140, which extends along the first direction D1. The first end of the guide member 140 is fixedly connected to the mounting seat 110, and the second end of the guide member 140 extends to the guide hole 122. The use of the guide member 140 and the guide hole 122 in combination can ensure that the support member 120 moves within a predetermined range, prevent the position of the support member 120 from deviating too much due to external force or operation error, and limit the support member 120 within a certain range while improving the positioning accuracy during the welding process.

[0103] like Fig. 9 As shown, the size of the first end of the guide member 140 is smaller than the radial size of the second end. The larger radial size of the second end of the guide member 140 can prevent the guide member 140 from falling off from the guide hole 122, thereby ensuring that the guide member 140 can be stably maintained in an appropriate position during the welding process.

[0104] Optionally, the guide member 140 is provided with a step portion 141, and the step portion 141 is used to engage with the guide hole 122. In a natural state, the inner wall of the guide hole 122 of the support member 120 abuts against the step portion 141. It can be understood that when the inner wall of the guide hole 122 abuts against the step portion 141, the distance between the support member 120 and the mounting seat 110 is the largest. At this time, the state of the elastic member 130 is as follows: Figure 8 (b) When the welding jig 10 is used to weld the battery cover 20, the battery cover 20 is in contact with the support member 120, the support member 120 is leveled by the elastic member 130, the support member 120 is fitted with the battery cover 20, and the state of the elastic member 130 is as follows: Figure 8 (a).

[0105] There are a plurality of guide members 140, and the plurality of guide members 140 are arranged at intervals in the circumferential direction around the welding groove 121. The circumferentially distributed arrangement of the elastic members 130 can ensure that the support member 120 can be uniformly supported and guided.

[0106] The guide member 140 and the elastic member 130 extend in the same direction, so that the support member 120 can move along the guide member 140 .

[0107] In some embodiments of the present invention, the welding groove 121 is constructed as a gradually expanding groove structure, and the side of the welding groove 121 with a larger opening area is used to face the welding head. Specifically, the welding groove 121 faces the laser 30. When the laser 30 is welding, the laser beam will be emitted to the battery cover 20 at different angles. The groove setting avoids blocking the laser beam. Similarly, the through groove 112 is constructed as a gradually expanding groove structure, and the side of the through groove 112 with a larger opening area is used to face the laser 30.

[0108] In some embodiments of the utility model, the support member 120 is provided with a nitrogen channel 123 connected to the welding groove 121, and the nitrogen channel 123 is used to allow nitrogen to pass through. The welding fixture 10 is also provided with a nitrogen connector 150, which is arranged on the mounting seat 110, and the nitrogen connector 150 is fluidically connected to the nitrogen channel 123. Through this nitrogen channel 123, nitrogen can be supplied to the welding groove 121 during the welding process, thereby forming a protective nitrogen environment, which helps to prevent the metal material from reacting with oxygen in the air during the welding process, reduce oxidation and contamination of the material, and improve the welding quality and the surface quality of the finished product. At the same time, by controlling the flow and pressure of the nitrogen channel 123, the temperature and environment of the welding area can also be adjusted, so as to better control the melting and flow of the metal material during the welding process.

[0109] Reference Figure 10-Figure 16 The utility model also provides a welding device, including a frame 80, a laser 30, and the above-mentioned welding jig 10, wherein the laser 30 and the welding jig 10 are arranged on the frame 80 at intervals along the height direction DH; wherein the welding groove 121 is used for the laser beam of the laser 30 to pass through, so that the laser beam is directed to the area to be welded of the battery cover 20.

[0110] The laser 30 and the welding jig 10 are spaced apart from each other in the height direction DH of the frame 80 .

[0111] In some embodiments of the present invention, Figure 11-12 As shown, a dust removal assembly is also included, and the dust removal assembly includes a protective cover 50 and a dust collector. The protective cover 50 is used to place the welding fixture 10. The dust collector is connected to the protective cover 50, and the dust collector is used to absorb the smoke generated when the laser 30 is welded. The protective cover 50 is fixedly connected to the frame 80.

[0112] Optionally, the protective cover 50 includes a first opening and a second opening that are arranged opposite to each other; the first opening is used to face the laser 30, and the welding fixture 10 is movably arranged in the second opening. It can be understood that the protective cover 50 is provided with a side wall 51 and a bottom wall 52. The bottom wall 52 is provided with a second opening.

[0113] In some embodiments of the present invention, a driving member 40 is further included, and the driving member 40 is used to drive the welding fixture 10 to move along the height direction DH.

[0114] Optionally, the driving member 40 is a slide cylinder. Figure 13-14As shown, the piston rod of the slide cylinder is connected to the welding jig 10 through the connecting plate 41, and the cylinder body is connected to the side wall 51 of the dust cover. The connecting plate 41 extends below the bottom wall 52 of the dust cover to connect to the welding jig 10. Specifically, the driving member 40 is connected to the side wall 51 of the mounting seat 110, and the driving member 40 can drive the mounting seat 110 to drive the support member 120 to move along the height direction DH. In addition, along the height direction DH, the support member 120 is lower than the connecting plate 41 to avoid interference with the contact between the support member 120 and the battery cover 20.

[0115] Optionally, a guide shaft 42 is provided inside the dust cover, and the guide shaft 42 extends in the height direction DH. An oil-free bushing 43 is installed on the guide shaft 42. The welding jig 10 is connected to the oil-free bushing 43. Through the cooperation between the oil-free bushing 43 and the guide shaft 42, the movement of the welding jig 10 in the height direction DH is achieved. The welding jig 10 is provided with a driving force by the above-mentioned driving member 40. Specifically, the oil-free bushing 43 is connected to the connecting plate 41, and when the driving member 40 drives the mounting seat 110 to move, the guide shaft 42 and the oil-free bushing 43 can ensure the smooth movement of the mounting seat 110.

[0116] In some embodiments of the present invention, a plurality of welding jigs 10 are arranged side by side. Accordingly, a plurality of guide shafts 42 and oil-free bushings 43 are arranged in a matching manner. The number of guide shafts 42 and oil-free bushings 43 is several times the number of welding jigs 10. One welding jig 10 can be provided with multiple sets of guide shafts 42 and oil-free bushings 43 so that the welding jig 10 can move stably.

[0117] In some embodiments of the present invention, a moving assembly 60 is further included, and the moving assembly 60 can drive the laser 30 to move relative to the frame 80 .

[0118] Alternatively, if Figure 15-16 As shown, the moving assembly 60 includes a first mounting plate 61, a second mounting plate 62, a rotating shaft 63, and a screw rod 64. The first mounting plate 61 is fixedly connected to the laser 30. The second mounting plate 62 is spaced apart from the first mounting plate 61. The rotating shaft 63 is arranged between the first mounting plate 61 and the second mounting plate 62, so that the first mounting plate 61 and the second mounting plate 62 can rotate relative to each other. The screw rod 64 is rotatably connected to the frame 80, and the screw rod 64 is threadedly connected to the second mounting plate 62. Through the arrangement of the moving assembly 60, the laser 30 can be focused and leveled, which helps to ensure the accurate irradiation of the laser beam during the welding process, and can adapt to the welding requirements at different positions and angles, improve the flexibility and applicability of the equipment, and make the welding process more efficient and accurate.

[0119] In the present invention, the rotation of the rotating shaft 63 and the screw rod 64 is controlled manually or mechanically. According to the actual situation, the position of the welding fixture 10 is adjusted mechanically or manually, so as to achieve accurate control of the welding process.

[0120] Optionally, the moving assembly 60 further includes a fixing member 65, the fixing member 65 extends in the height direction DH, the middle portion of the fixing member 65 is connected to the frame 80 by a thread, and one end portion of the fixing member 65 abuts against the second mounting plate 62. After the second mounting plate 62 is adjusted in relative height with the frame 80 by the screw rod 64, the fixing member 65 abuts against the second mounting plate 62 to limit the second mounting plate 62 in the height direction DH. Optionally, a plurality of fixing members 65 are provided.

[0121] As can be seen from the above, the welding fixture 10 is provided with a nitrogen connector 150. In some embodiments of the present invention, the welding device is provided with a connecting valve 70, and the connecting valve 70 is used to connect to the nitrogen generating device. The nitrogen connector 150 is connected to the connecting valve 70 through a pipeline, so as to realize the nitrogen supply during the welding process.

[0122] On the basis of the above embodiment, a flow meter 71 is further provided, and the flow meter 71 is used to detect the flow in the pipeline, so that the flow size can be visualized to achieve size control.

[0123] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0124] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A welding jig, used for supporting and positioning double-layer stacked plates placed on a receiving platform during welding, characterized in that: include: A support member, wherein the support member can press the plate onto the receiving platform; An elastic member, wherein the elastic member is connected to the supporting member so that the supporting member can automatically adjust the balance according to the plate, or the elastic member is used to be connected to the plate so that the plate can automatically adjust the balance according to the supporting member.

2. The welding jig according to claim 1, characterized in that: The elastic member is connected to the supporting member, and the elastic member is always in a compressed state.

3. The welding jig according to claim 2, characterized in that: The elastic member comprises: A top ball, the top ball abutting against the support member; A spring is connected to the top ball and provides elastic force to the top ball so that the top ball always abuts against the support member.

4. The welding jig according to claim 1, characterized in that: The support member is provided with a welding groove penetrating along a first direction, and the welding groove is used to expose the area to be welded of the plate.

5. The welding jig according to claim 4, characterized in that: The welding groove is constructed as a gradually expanding groove structure, and the side of the welding groove with a larger opening area is used to face the welding head.

6. The welding jig according to claim 4, characterized in that: The support member is provided with an air inlet passage communicated with the welding groove, and the air inlet passage is used for allowing an inert gas to pass through.

7. The welding jig according to claim 1, characterized in that: The welding jig further comprises a mounting seat, wherein the mounting seat is spaced apart from the receiving platform, and the elastic member is connected between the mounting seat and the supporting member so that the supporting member can move relative to the mounting seat.

8. The welding jig according to any one of claims 1 to 7, characterized in that: The invention also comprises a guide member connected to the supporting member, wherein the extending direction of the guide member is the same as that of the elastic member, so that the supporting member can move along the guide member.

9. The welding jig according to claim 8, characterized in that: The guide member is provided with a limiting portion, and the support member moves between the limiting portion and the mounting seat under the action of the elastic member.

10. The welding jig according to claim 9, characterized in that: The support member is provided with a guide hole, and the radial dimension of at least part of the guide hole is smaller than the radial dimension of the limiting portion. The support member is movably connected to the guide member through the guide hole.

11. The welding jig according to claim 10, characterized in that: The guide member further comprises a main body portion, wherein the radial dimension of the main body portion is smaller than the radial dimension of the limiting portion; The radial dimension of at least part of the guide holes is larger than the radial dimension of the main body, so that the support member can be tilted relative to the mounting seat.

12. The welding jig according to claim 8, characterized in that: The support member is provided with a welding groove; The elastic members are provided in a plurality, and the plurality of elastic members are arranged circumferentially and spaced apart around the welding groove; and / or The guide members are provided in plurality, and the plurality of guide members are arranged at intervals in the circumferential direction around the welding groove.

13. A welding device, characterized in that: It comprises a frame, and a welding jig according to any one of claims 1 to 12, wherein the support member is mounted to the frame.

14. The welding device according to claim 13, characterized in that The welding equipment further comprises a laser, and the laser and the welding jig are arranged on the frame at intervals along a height direction.

15. The welding device according to claim 13 or 14, characterized in that The welding jigs are arranged in plurality.

16. The welding device according to claim 14, characterized in that It also includes a driving member, the driving member is used to drive the welding fixture to move along the height direction; and / or The utility model also comprises a moving component, wherein the moving component can drive the laser to move relative to the frame, so that the laser can be focused and leveled.

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