Welding jig and equipment

Abstract

The utility model provides a welding jig and equipment, which are used for fixing a workpiece flowing along a first direction, and comprise a bracket, a first guide rail and a second guide rail, the lifting structure is arranged on the support, and the lifting structure is used for bearing the workpiece and jacking up the workpiece in the second direction; the inner supporting structure is arranged on the support, after the workpiece is jacked up, the inner supporting structure can correspond to the interior of the workpiece, the inner supporting structure can move in the third direction, and the third direction is perpendicular to the second direction; the pressing structure is arranged on the support, can move in the direction close to the inner supporting structure and is used for being matched with the inner supporting structure to clamp the workpiece. In other words, the welding jig can achieve automatic clamping of the fed workpieces, and the welding efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of welding fixture technology, and more specifically, relates to a welding fixture and equipment. Background Technology

[0002] Currently, most products use laser welding in their manufacturing process. However, laser welding requires high precision in product clamping and positioning. For example, during welding, an internal support structure is needed to support the product from within to ensure the welded area is compressed and the seam meets welding requirements. Currently, product clamping is done manually, which is inefficient. Utility Model Content

[0003] This application aims to provide welding fixtures and equipment to solve at least one of the technical problems mentioned in the background art.

[0004] The technical solution adopted in this application is a welding fixture for fixing a workpiece flowing along a first direction, comprising:

[0005] support;

[0006] A lifting structure is provided on the bracket, and the lifting structure is used to support the workpiece and lift the workpiece along the second direction;

[0007] An inner support structure is disposed on the bracket, and after the workpiece is lifted, the inner support structure can correspond to the interior of the workpiece, and the inner support structure can move along a third direction, which is perpendicular to the second direction; and

[0008] A clamping structure is provided on the bracket and can move toward the inner support structure to cooperate with the inner support structure to clamp the workpiece.

[0009] In other words, in the welding fixture, the lifting structure can lift the workpiece flowing in the first direction, and after the workpiece is lifted, the inner support structure can correspond to the inside of the workpiece. After the inner support structure is located inside the workpiece, it can move in the third direction to contact the workpiece. At the same time, the clamping structure can move towards the inner support structure. The press structure and the inner support structure cooperate to clamp the workpiece from the inside and outside of the workpiece, respectively, so as to facilitate welding of the workpiece.

[0010] It can be seen that the welding fixture of this application can realize automated clamping of moving workpieces, thereby improving welding efficiency.

[0011] Optionally, the inner support structure includes a mounting bracket, a first inner drive member, and an inner support member, wherein,

[0012] A receiving cavity capable of accommodating the workpiece is formed between the mounting bracket and the support.

[0013] The inner support member is disposed on the mounting bracket and corresponds to the opening of the workpiece. After the workpiece is raised, the inner support member can be located inside the workpiece through the opening; and

[0014] The first inner drive member is driven to connect with the inner support member so that the inner support member moves in a third direction.

[0015] Optionally, the first internal drive unit further includes a driver, a fixing part, a first transmission part, and a second transmission part;

[0016] The fixing part is disposed on the mounting bracket;

[0017] The inner support member is movably disposed on the mounting frame in a third direction, and an elastic member is provided between the inner support member and the fixed part, the elastic member enabling the inner support member to move toward the fixed part;

[0018] A first transmission unit is disposed on the inner support member, and a second transmission unit is drivenly connected to the driver; and

[0019] The first transmission part has a first inclined surface on the side near the fixed part, and the second transmission part has a second inclined surface that slides with the first inclined surface. The driver is used to drive the second transmission part to move in a second direction so that the sliding engagement between the second inclined surface and the first inclined surface causes the first transmission part to drive the inner support member away from the fixed part.

[0020] Optionally, the tilt distance of the first inclined surface in a third direction is the same as the distance at which the inner support moves to contact the workpiece.

[0021] Optionally, the inner support structure further includes a first contact member and a second contact member, which are respectively disposed on the inner support member. The first contact member and the second contact member are respectively used to contact the portions on both sides of the weld in the workpiece; and

[0022] A gap exists between the first contact and the second contact, the gap being used to correspond to the weld seam of the workpiece.

[0023] Optionally, an included angle is formed between the first contact and the second contact, and the included angle is the same as the included angle between the portions on both sides of the weld of the workpiece.

[0024] Optionally, the clamping structure includes a first clamping member and a second clamping member, wherein the first clamping member and the second clamping member are disposed on the bracket;

[0025] The first clamping member can move toward the first contact member; and

[0026] The second clamping member can move toward the direction of the second contact member.

[0027] Optionally, the inner support structure further includes a second inner drive member, which drives the mounting bracket to move along a second direction; and

[0028] The second internal driving component is respectively disposed on both sides of the clearance hole of the bracket, and the two sides of the mounting bracket are respectively connected to the driving end of the second internal driving component.

[0029] Optionally, the welding fixture further includes a positioning structure, which comprises a first limiting member, a first positioning member, a second limiting member, and a second positioning member; wherein,

[0030] The first limiting member and the first positioning member are respectively disposed at both ends of the clearance hole along a first direction, and the first positioning member is movable toward the first limiting member; and

[0031] The second limiting member and the second positioning member are respectively disposed on both sides of the clearance hole along the fourth direction, and the second positioning member can move toward the second limiting member. The fourth direction is perpendicular to the first direction and the second direction respectively.

[0032] A welding apparatus includes a welding robot and a welding fixture as described above, the welding robot being located on one side of the welding fixture, the welding robot being used to weld the weld seam of a workpiece on the welding fixture.

[0033] Optionally, it also includes a transmission mechanism, wherein the bracket is provided with a workpiece flow channel, the lifting structure is disposed in the workpiece flow channel, and the transmission mechanism is connected to the lifting structure through the workpiece flow channel. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a welding fixture provided in an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the internal support structure and clamping structure in a welding fixture provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the structure of the first internal drive component in a welding fixture provided in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the positioning structure in a welding fixture provided in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the lifting structure in a welding fixture provided in an embodiment of this application.

[0040] Figure label:

[0041] 100. Support; 110. Workpiece flow channel; 120. Clearance hole;

[0042] 200. Lifting structure; 210. Lifting drive component; 220. Lifting component;

[0043] 300. Internal support structure; 310. Mounting bracket; 311. Receiving cavity; 320. First internal drive member; 321. Driver; 322. Fixing part; 323. First transmission part; 324. Second transmission part; 325. First inclined surface; 326. Second inclined surface; 330. Internal support member; 340a. First sliding member; 340b. Second sliding member; 350. Mounting base; 360a. First contact member; 360b. Second contact member; 370. Gap; 380. Second internal drive member; 390. Guide member;

[0044] 400, clamping structure; 410, first clamping component; 420, second clamping component; 430, first clamping drive component; 440, second clamping drive component;

[0045] 500, Positioning structure; 510, First limiting component; 520, First positioning component; 530, Second limiting component; 540, Second positioning component; 550, First positioning drive component; 560, Second positioning drive component;

[0046] 600. Workpiece. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0048] It should be noted that when a metastructure is said to be "fixed to" or "set to" another metastructure, it can be directly on or indirectly on that other metastructure. When a metastructure is said to be "connected to" another metastructure, it can be directly connected to or indirectly connected to that other metastructure.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or metastructure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the descriptions of some applications, "multiple" means two or more, unless otherwise explicitly specified.

[0051] like Figure 1 and Figure 5 As shown, this application provides a welding fixture, including a bracket 100, a lifting structure 200, an inner support structure 300, and a clamping structure 400.

[0052] The lifting structure 200 is mounted on the support 100. The lifting structure 200 is used to receive the workpiece 600 flowing in the first direction and can drive the workpiece 600 to lift it in the second direction.

[0053] Specifically, after the workpiece 600 flows along the first direction to the area of ​​the lifting structure 200, the lifting structure 200 can drive the workpiece 600 to move along the second direction and lift it up.

[0054] The inner support structure 300 is disposed on the bracket 100, and after the workpiece 600 is lifted by the lifting structure 200, the inner support structure 300 can be located inside the workpiece 600, and the inner support structure 300 can move along a third direction, which is perpendicular to the second direction.

[0055] It is understood that in some embodiments, the workpiece 600, such as a fume hood, may have an opening, and when the workpiece 600 is raised, the inner support structure 300 can be located inside the workpiece 600 through the opening.

[0056] Specifically, the inner support structure 300 can move along a third direction and act on the workpiece 600 from inside the workpiece 600.

[0057] The clamping structure 400 is mounted on the bracket and can move toward the inner support structure 300 to cooperate with the inner support structure 300 to clamp the workpiece 600.

[0058] In other words, in the welding fixture, the lifting structure 200 can lift the workpiece 600 flowing in the first direction in the second direction. After the workpiece 600 is lifted, the inner support structure 300 can correspond to the inside of the workpiece 600. When the inner support structure 300 is inside the workpiece 600, the inner support structure 300 can move in the third direction to contact the workpiece 600. At the same time, the clamping structure 400 can move towards the inner support structure 300. The press structure and the inner support structure 300 cooperate to clamp the workpiece 600 from the inside and outside of the workpiece 600, respectively, so as to facilitate welding of the workpiece 600.

[0059] It can be seen that the welding fixture of this application can realize the automated clamping of the loaded workpiece 600, thereby improving the welding efficiency.

[0060] It should be noted that in some embodiments, when the lifting structure 200 lifts the workpiece 600 through the clearance hole 120 of the bracket 100, the inner support structure 300 can be located exactly inside the workpiece 600.

[0061] See Figure 2 The inner support structure 300 may include a mounting bracket 310, a first inner drive member 320, and an inner support member 330.

[0062] A receiving cavity 311 capable of accommodating the workpiece 600 can be formed between the mounting bracket 310 and the support 100. Specifically, after the workpiece 600 is raised, the workpiece 600 can be located in the receiving cavity 311 to facilitate subsequent clamping of the workpiece 600.

[0063] In some embodiments, the mounting bracket 310 may be a gantry structure, and the mounting bracket 310 may be mounted on the support 100.

[0064] The inner support 330 is disposed on the mounting bracket 310 and corresponds to the opening of the workpiece 600. After the workpiece is raised, the inner support 330 can be located inside the workpiece 600 through the opening of the workpiece 600.

[0065] In some embodiments, the inner support 330 may extend in a second direction toward the lifting structure 200, so that after the workpiece 600 is raised from the clearance hole 120, the inner support 330 is positioned inside the workpiece 600.

[0066] The first inner drive member 320 is driven to connect with the inner support member 330 so as to drive the inner support member 330 to move in a third direction.

[0067] Specifically, the first inner drive member 320 can be disposed on the mounting bracket 310. When the inner support member 330 is located inside the workpiece 600, the first inner drive member 320 can drive the inner support member 330 to move along a third direction and act on the workpiece 600.

[0068] In some implementations, the first internal drive member 320 can be directly a cylinder with a third-direction drive.

[0069] In other embodiments, see Figure 3 The first internal drive unit 320 may also include a driver 321, a fixing part 322, a first transmission part 323, and a second transmission part 324.

[0070] The fixing part 322 is provided on the mounting bracket 310.

[0071] The inner support member 330 is movably disposed on the mounting bracket 310 in a third direction. An elastic member is provided between the inner support member 330 and the fixing part 322, which allows the inner support member 330 to move toward the fixing part 322. For example, the elastic member can be a tension spring.

[0072] A first transmission part 323 is disposed on the inner support member 330, and a second transmission part 324 is drivenly connected to a driver 321, which can drive the second transmission part 324 to move in a second direction. The driver 321 can be a cylinder. The first transmission part 323 can be integrally formed with the inner support member 330.

[0073] The first transmission part 323 has a first inclined surface 325 on the side near the fixed part 322, and the second transmission part 324 has a second inclined surface 326 that slides with the first inclined surface 325.

[0074] The driver 321 drives the second transmission part 324 to move in the second direction, so that the sliding engagement between the second inclined surface 326 and the first inclined surface 325 causes the first transmission part 323 to move away from the fixed part 322. That is, when the driver 321 drives the second transmission part 324 to move in the second direction, the second transmission part 324 can cause the first transmission part 323 to move away from the fixed part 322, and the first transmission part 323 drives the inner support member 330 to move closer to the workpiece 600 in the third direction during the process of moving away from the fixed part 322.

[0075] For example, in some embodiments, the end of the first inclined surface 325 away from the inner support member 330 gradually shifts away from the fixing part 322 in the third direction, and the end of the second inclined surface 326 near the driver 321 gradually shifts away from the fixing part 322 in the third direction. In this way, when the driver 321 drives the second transmission part 324 to move closer to the bracket 100 in the second direction, the second transmission part 324 can cause the first transmission part 323 to drive the inner support member 330 to move in the third direction.

[0076] When the driver 321 drives the second transmission part 324 to move away from the bracket 100 in the second direction, the inner support 330 can move closer to the fixed part 322 under the action of the elastic member.

[0077] Optionally, the inclination distance of the first inclined surface 325 in a third direction is the same as the distance the inner support 330 moves to contact the workpiece 600. In this way, from the initial sliding engagement to the final contact of the first inclined surface 325 of the first transmission part 323, the second inclined surface 326 of the second transmission part 324 can precisely drive the inner support 330 to move the required distance to contact the workpiece 600. That is, this method allows the driver 321 to accurately drive the inner support 330 to move the required distance, with lower requirements for the driver's accuracy. Furthermore, when different workpieces 600 are clamped in the welding fixture, only the first transmission part 323 with the same inclination angle but a different inclination distance needs to be replaced as needed.

[0078] See Figure 3 In some embodiments, to facilitate the installation of the driver 321, the driver 321 may be disposed on the fixing part 322. For example, the fixing part 322 may be an upright plate extending along the second direction.

[0079] Furthermore, in some embodiments, in order to ensure the stability and accuracy of the movement of the inner support member 330 along a third direction, a first sliding member 340a may be provided between the inner support member 330 and the mounting bracket 310. The first sliding member 340a may be a slide rail.

[0080] In some embodiments, to facilitate the connection between the inner support member 330 and the first sliding member 340a, the inner support member 330 can be mounted on the sliding member via a mounting base 350. In this case, the first transmission part 323 can also be mounted on the mounting base 350.

[0081] In some embodiments, to ensure the stability and accuracy of the movement of the second transmission part 324 along the second direction, a second sliding member 340b may be provided between the second transmission part 324 and the fixed part 322. The second sliding member 340b may be a slide rail.

[0082] See Figure 3 The inner support structure may also include a first contact 360a and a second contact 360b, which are respectively disposed on the inner support 330. The first contact 360a and the second contact 360b are respectively used to contact the parts on both sides of the weld of the workpiece 600.

[0083] Furthermore, a gap 370 is provided between the first contact 360a and the second contact 360b, the gap 370 corresponding to the weld seam of the workpiece 600. The gap 370 can be used to prevent the laser from acting on the first contact 360a and the second contact 360b when welding the weld seam.

[0084] Furthermore, an angle is formed between the first contact 360a and the second contact 360b, and this angle is the same as the angle between the portions on both sides of the weld seam of the workpiece 600. For example, when the portions on both sides of the weld seam of the workpiece 600 form a 90° angle, a 90° angle can also be formed between the first contact 360a and the second contact 360b. In this case, the third direction can be the centerline direction of the angle between the portions on both sides of the weld seam of the workpiece 600.

[0085] Combination Figure 2 and Figure 3 The clamping structure 400 may include a first clamping member 410 and a second clamping member 420. The first clamping member 410 and the second clamping member 420 are disposed on the bracket 100. The first clamping member 410 is movable toward the first contact member 360a, and the second clamping member 420 is movable toward the second contact member 360b.

[0086] Specifically, after the workpiece 600 is lifted from the clearance hole 120 under the action of the lifting structure 200, the inner support member 330 can be located inside the workpiece 600, and the inner support member 330 can move towards the workpiece 600 in a third-direction upward direction so that the first contact member 360a and the second contact member 360b can respectively contact the parts on both sides of the weld of the workpiece 600. At the same time, the first clamping member 410 can move towards the first contact member 360a, and the first clamping member 410 cooperates with the first contact member 360a to clamp the part on one side of the weld. The second clamping member 420 can move towards the second contact member 360b, and the second clamping member 420 cooperates with the second contact member 360b to clamp the part on the other side of the weld.

[0087] In some embodiments, the clamping structure 400 may further include a first clamping drive 430 and a second clamping drive 440. The first clamping drive 430 may be disposed on the mounting bracket 310 and is drivenly connected to the first clamping member 410. The second clamping drive 440 may be disposed on the mounting member and is drivenly connected to the second clamping member 420. The first clamping drive 430 and the second clamping drive 440 may be cylinders.

[0088] See Figure 2 The inner support structure 300 may also include a second inner drive member 380, which drives the mounting bracket 310 to move along a second direction.

[0089] Understandably, in some implementations, when the lifting structure 200 lifts the workpiece 600 through the clearance hole 120, the inner support structure 300 can be located exactly inside the workpiece 600.

[0090] In other embodiments, after the lifting structure 200 lifts the workpiece 600 through the clearance hole 120, the inner support structure 300 can drive the mounting bracket 310 through the second inner drive member 380 to move the inner support member 330 along the second direction into the interior of the workpiece 600.

[0091] The second inner drive member 380 drives the inner support member 330 to move in the second direction, which can prevent the workpiece 600 from colliding with the inner support member 330 after it rises from the clearance hole 120, and can adjust the position of the inner support member 330 in the second direction so that the first contact member 360a and the second contact member 360b can accurately contact the clamping part of the workpiece 600.

[0092] Specifically, the second internal drive unit 380 can be respectively disposed on both sides of the clearance hole 120 of the bracket 100, and both sides of the mounting bracket 310 are respectively connected to the drive end of the second internal drive unit 380. There can be two second internal drive units 380, and the second internal drive unit 380 can be a cylinder.

[0093] See Figure 2 The inner support structure 300 may also include a guide member 390. A guide member 390 may be provided between the mounting member and the bracket 100. The guide member 390 guides the movement of the mounting member in the second direction. For example, the guide member 390 may include a guide rod and a sliding sleeve. The guide rod may be provided on the bracket 100, and the sliding sleeve is connected to the mounting bracket 310 and slidably disposed on the guide rod.

[0094] See Figure 1 and Figure 4 The welding fixture may also include a positioning structure 500, which positions the workpiece 600 after it is lifted from the clearance hole 120.

[0095] The positioning structure 500 may include a first limiting member 510, a first positioning member 520, a second limiting member 530, and a second positioning member 540.

[0096] The first limiting member 510 and the first positioning member 520 are respectively disposed at both ends of the clearance hole 120 along the first direction, and the first positioning member 520 is capable of moving toward the first limiting member 510. When the first positioning member 520 moves toward the first limiting member 510, the first positioning member 520 can position the workpiece 600 on the first limiting member 510 in the first direction.

[0097] The second limiting member 530 and the second positioning member 540 are respectively disposed on both sides of the clearance hole 120 along the fourth direction, and the second positioning member 540 is movable toward the second limiting member 530. When the second positioning member 540 moves toward the second limiting member 530, it can position the workpiece 600 on the second limiting member 530 in the fourth direction. The fourth direction is perpendicular to both the first and second directions.

[0098] In some embodiments, the positioning structure 500 may further include a first positioning drive 550 and a second positioning drive 560.

[0099] The first positioning drive 550 is driven to the first positioning member 520 to drive the first positioning member 520 to move along a first direction. Specifically, the first positioning drive 550 can be mounted on the bracket 100. The first positioning drive 550 can be a cylinder.

[0100] The second positioning drive 560 is driven to the second positioning drive 540, and the second positioning drive 560 is driven to the second positioning drive 540 to move in the fourth direction. Specifically, the second positioning drive 560 can be mounted on the bracket 100. The second positioning drive 560 can be a cylinder.

[0101] In addition, this application also provides a welding device, including a welding robot and the welding machine mechanism in the above embodiments. The welding robot is located on one side of the welding fixture and is used to weld the weld seam of the workpiece 600 on the welding fixture.

[0102] Furthermore, the support 100 is provided with a workpiece flow channel 110 along a first direction, and a clearance hole 120 is also provided on the support 100 along a second direction. The first direction and the second direction are perpendicular to each other, and the second direction can be the vertical direction shown in the attached figure. The workpiece flow channel 110 refers to the area on the support 100 where the workpiece 600 flows during loading and unloading. For example, the workpiece flow channel 110 can be a through hole provided on the support 100 along the first direction.

[0103] The lifting structure 200 can be installed in the workpiece flow channel 110 and corresponding to the clearance hole 120.

[0104] The welding equipment may also include a transfer mechanism, which connects to the lifting structure 200 via the workpiece flow channel 110. The transfer mechanism is used to transfer workpieces 600. The transfer mechanism can be an assembly line, such as a conveyor belt.

[0105] Specifically, after the workpiece 600 conveyed on the transmission mechanism arrives at the lifting structure 200, the lifting structure 200 can lift the workpiece 600 from the clearance hole 120.

[0106] In some embodiments, the transmission mechanism may be provided with a clearance position to avoid the lifting structure 200. For example, when the lifting structure 200 is in its initial position, it may be located below the transmission mechanism. When the workpiece 600 moves above the lifting structure 200, the lifting structure 200 can lift the workpiece 600.

[0107] Additionally, in some implementations, see [reference] Figure 5 The lifting structure 200 may include a lifting component 220 and a lifting drive component 210. The lifting component 220 may be located within the workpiece flow channel 110 and is provided with a corresponding clearance hole 120. The lifting drive component 210 is drivenly connected to the lifting component 220. The lifting drive component 210 may be a lifting cylinder, a lead screw drive device, etc.

[0108] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of some applications should be included within the protection scope of some applications.

Claims

1. A welding jig for fixing a workpiece flowing along a first direction, characterized in that: include: Bracket; A lifting structure, disposed on the bracket, and used for receiving the workpiece and lifting the workpiece along the second direction; an inner support structure, which is disposed on the bracket, and after the workpiece is lifted up, the inner support structure can correspond to the inside of the workpiece, and the inner support structure can move along a third direction, and the third direction is perpendicular to the second direction; as well as The clamping structure is arranged on the bracket and can move toward the direction close to the inner supporting structure, and is used for clamping the workpiece in cooperation with the inner supporting structure.

2. The welding jig according to claim 1, characterized in that: The inner support structure comprises a mounting frame, a first inner driving member and an inner support member, wherein: A receiving cavity capable of receiving the workpiece is formed between the mounting frame and the bracket; The inner support member is disposed on the mounting frame and corresponds to the opening of the workpiece. After the workpiece is raised, the inner support member can be located inside the workpiece through the opening of the workpiece; and The first inner driving member is drivingly connected to the inner supporting member so as to move the inner supporting member along a third direction.

3. The welding jig according to claim 2, characterized in that: The first inner driving member further includes a driver, a fixing portion, a first transmission portion and a second transmission portion; The fixing portion is arranged on the mounting frame; The inner support member is movably arranged on the mounting frame along the third direction, and an elastic member is arranged between the inner support member and the fixing portion, and the elastic member enables the inner support member to move toward the direction close to the fixing portion; The first transmission part is disposed on the inner support member, and the second transmission part is drivingly connected to the driver; and A first inclined surface is provided on a side of the first transmission part close to the fixed part, and a second inclined surface is provided on the second transmission part to slide with the first inclined surface. The driver is used to drive the second transmission part to move in a second direction, so that the sliding cooperation between the second inclined surface and the first inclined surface enables the first transmission part to drive the inner support member away from the fixed part.

4. The welding jig according to claim 3, characterized in that: The inclination distance of the first inclined surface in the third direction is the same as the distance that the inner support member moves to contact the workpiece.

5. The welding jig according to any one of claims 2 to 4, characterized in that: The inner support structure further includes a first contact piece and a second contact piece, the first contact piece and the second contact piece are respectively arranged on the inner support piece, and the first contact piece and the second contact piece are respectively used to contact the parts on both sides of the weld in the workpiece; as well as A gap is defined between the first contact piece and the second contact piece, and the gap is used to correspond to a welding seam of the workpiece.

6. The welding jig according to claim 5, characterized in that: An angle is formed between the first contact piece and the second contact piece, and the angle is the same as the angle of the parts on both sides of the weld of the workpiece.

7. The welding jig according to claim 5, characterized in that: The pressing structure comprises a first pressing member and a second pressing member, wherein the first pressing member and the second pressing member are arranged on the bracket; The first pressing member is capable of moving toward a direction close to the first contact member; and The second pressing member can move toward a direction approaching the second contact member.

8. The welding jig according to any one of claims 2 to 4, characterized in that: The inner support structure further comprises a second inner driving member, the second inner driving member driving the mounting frame to move along a second direction; and The second inner driving member is respectively arranged on both sides of the air avoidance hole of the bracket, and both sides of the mounting frame are respectively connected to the driving ends of the second inner driving member.

9. The welding jig according to claim 8, characterized in that: The welding fixture further includes a positioning structure, which includes a first limiting member, a first positioning member, a second limiting member, and a second positioning member; wherein, The first limiter and the first positioning member are respectively arranged at two ends of the avoidance hole along a first direction, and the first positioning member can move toward a direction close to the first limiter; and The second limiter and the second positioning member are respectively arranged on both sides of the avoidance hole along a fourth direction, and the second positioning member can move toward a direction close to the second limiter. The fourth direction is respectively perpendicular to the first direction and the second direction.

10. A welding device, characterized in that: It comprises a welding robot and a welding jig as claimed in any one of claims 1 to 9, wherein the welding robot is located at one side of the welding jig, and the welding robot is used to weld a weld seam of a workpiece on the welding jig.

11. The welding device according to claim 10, characterized in that It also includes a transmission mechanism, the support is provided with a workpiece flow channel, the lifting structure is arranged in the workpiece flow channel, and the transmission mechanism is connected to the lifting structure through the workpiece flow channel.

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