A welding fixture

Abstract

The embodiment of the present application discloses a welding tool, which comprises a base and an adjustable clamp, the adjustable clamp comprises a plurality of limiting parts and a plurality of mounting parts, each limiting part is suitable for limiting a piece to be welded, and the plurality of mounting parts are switchably connected with the base, so that at least one limiting part is located at a welding position. According to the welding tool, the piece to be welded can be well positioned, so that the welding difficulty of the piece to be welded is reduced, in addition, the plurality of mounting parts are switchably connected with the base, so that at least one limiting part is located at the welding position, welding requirements of different pieces to be welded can be met, and the welding tool has high practicability and good flexibility.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a welding fixture. Background Technology

[0002] In automobile manufacturing, a car typically contains numerous weld points, which are weak points where structural failure is likely, directly impacting the vehicle's safety performance. Therefore, a comprehensive safety performance assessment of the resistance spot welding process and structure is necessary. However, the small size of the parts required for testing can easily increase the difficulty of welding. Utility Model Content

[0003] This application provides a welding fixture designed to improve the problem of difficult welding of parts required for testing.

[0004] According to an embodiment of this application, the welding fixture includes a base and an adjustable clamp. The adjustable clamp includes a plurality of limiting parts and a plurality of mounting parts. Each limiting part is adapted to restrict the workpiece to be welded. The plurality of mounting parts are switchably connected to the base so that at least one of the limiting parts is in the welding position.

[0005] The welding fixture according to the embodiments of this application can effectively limit the workpiece to be welded, thereby reducing the welding difficulty of the workpiece. In addition, multiple mounting parts can be switched to be connected to the base so that at least one limiting part is located in the welding position, which can meet the welding requirements of different workpieces to be welded. It is highly practical and flexible.

[0006] In addition, the welding fixture according to this application may also have the following additional technical features: In some embodiments of this application, the adjustable clamp includes: a clamp plate, the clamp plate including a first side, a second side, and at least one third side, the first side and the second side being located on opposite sides of the clamp plate along a first direction, the third side being connected between the first side and the second side, wherein a plurality of mounting portions include a first mounting portion and a second mounting portion, a plurality of limiting portions include a first limiting portion and a second limiting portion, the first mounting portion being formed by at least a portion of the first side, the clamp plate being adapted to be supported on the mounting surface of the base by the first side, so that the first limiting portion is located in a welding position; the second mounting portion includes a slot, the slot being formed by at least a portion of the third side recessed inward, the slot being adapted to engage with the base, so that the second limiting portion is located in a welding position.

[0007] In the above-mentioned technical methods, the mounting part can be formed by different structures, so that at least one limiting part is located in the welding position, and the workpiece to be welded can be arranged on the fixture plate in a better way. It can meet the welding requirements of different workpieces to be welded, and has strong practicality and good flexibility.

[0008] In some embodiments of this application, the base includes a base plate, and along the first direction, the slot is formed as a through groove penetrating the clamp plate, and the slot engages with the outer periphery of the base plate.

[0009] Among the above-mentioned technical methods, the base and clamp plate of this application have simple structure and are easy to disassemble and assemble, which can better meet the welding needs of different parts to be welded, and are highly practical and flexible.

[0010] In some embodiments of this application, the first limiting portion includes a first limiting groove, and a portion of the bottom wall of the first limiting groove penetrates the fixture plate along the first direction to form a welding hole.

[0011] In the above-mentioned technical method, when two metal welding plates are arranged in the first limiting groove, the first limiting groove can effectively limit the metal welding plates. When the two metal welding plates are stacked, the stacked position of the two metal welding plates can be directly opposite the weld hole. The first welding bracket and the second welding bracket can be arranged on the upper and lower sides of the two metal welding plates respectively, so that the welding equipment can weld the two metal welding plates through the weld hole.

[0012] In some embodiments of this application, the first limiting groove extends along the second direction, and a plurality of first positioning members are provided in the first limiting groove. At least two of the first positioning members extend along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0013] In the above technical method, the third direction can be the width direction of the workpiece to be welded. When the width of the workpiece to be welded is different, the workpieces of different widths can be positioned by different first positioning members, so that the position of the workpiece to be welded is more stable, which is conducive to the welding of the workpiece to be welded.

[0014] In some embodiments of this application, the welding fixture further includes a second positioning member, a first positioning hole, and a second positioning hole. The first positioning hole is formed as a through hole that penetrates the fixture plate along the first direction. The second positioning hole is formed on the base and is disposed opposite to the first positioning hole. The second positioning member is adapted to pass through the first positioning hole and the second positioning hole.

[0015] In the above-mentioned technical method, by having the second positioning element pass through the first positioning hole and the second positioning hole respectively, the relative position between the fixture plate and the base can be well defined, which is beneficial for the welding equipment to weld the workpiece to be welded arranged on the fixture plate. In addition, the matching method of the second positioning element, the first positioning hole and the second positioning hole is simple and easy to disassemble and assemble, which can help the welding fixture to switch different postures to meet the different welding requirements of the workpiece to be welded.

[0016] In some embodiments of this application, the second limiting part includes a second limiting groove, which is disposed on the first side and / or the second side. The second limiting groove extends along a second direction and along a third direction. At least one side of the second limiting groove is provided with a sliding groove, which is adapted to slide with the workpiece to be welded. The first direction, the second direction and the third direction are all perpendicular to each other.

[0017] In the above-mentioned technical methods, the slide can effectively position the workpiece to be welded, enabling the welding fixture to meet the welding requirements of different workpieces. Furthermore, the slide has a simple structure, which can significantly reduce the production difficulty of the fixture plate.

[0018] In some embodiments of this application, the second limiting groove extends through the clamping plate along the second direction. The clamping plate further includes a first baffle and at least one second baffle. The first baffle is located at one end of the second limiting groove and is used to block the opening at the end of the second limiting groove. The second baffle is disposed on the side of the second limiting groove near the first baffle and is used to form the sliding groove with the second limiting groove.

[0019] In the above-mentioned technical method, the first baffle and the second baffle have simple structures, which can guide and limit the workpiece to be welded in a good way, and can also limit the position of the workpiece to be welded in a good way, so that the workpiece to be welded can be in the predetermined welding position, which is beneficial to the welding of the workpiece to be welded.

[0020] In some embodiments of this application, the first baffle also has a flange that folds toward the other end of the second limiting groove to form a slot with the second limiting groove, so as to allow the end of the workpiece to be welded to be inserted into the slot.

[0021] In the above-mentioned technical method, when the workpiece to be welded slides along the slide groove to be assembled in the second limiting groove, the end of the workpiece to be welded can abut against the first baffle and be inserted into the slot. The slot can better limit the end of the workpiece to be welded. Combined with the limiting of the workpiece to be welded by the slide groove and the second limiting groove, the position of the workpiece to be welded is more stable, which is beneficial to the welding equipment for welding the workpiece to be welded.

[0022] In some embodiments of this application, a plurality of third positioning members are provided in the second limiting groove, and at least two of the third positioning members are arranged at intervals along the third direction.

[0023] In the above technical method, along the third direction upward, for parts to be welded of different widths, the third positioning part can be used to weld the parts to be welded, thereby meeting the positioning requirements of parts to be welded of different widths, which is beneficial to the welding operation of the parts to be welded.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of a clamping plate in one orientation according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the fixture plate provided in one embodiment of this application in another orientation.

[0027] Explanation of reference numerals in the attached figures: 100. Welding fixture; 1. Base; 10. Seat plate; 2. Fixture plate; 20. Second side; 21. Slot; 22. First limiting slot; 23. Second limiting slot; 24. Weld hole; 25. Second positioning component; 31. First welding bracket; 32. Second welding bracket; 4. Part to be welded; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] In automobile manufacturing, a car typically contains numerous weld points, which are weak points where structural failure can occur, directly impacting the vehicle's safety performance. Therefore, a comprehensive safety performance assessment of the resistance spot welding process and structure is necessary. However, the small size of the parts required for testing can easily increase the difficulty of welding.

[0030] Furthermore, in related technologies, most resistance spot welding fixtures are specialized and can only adapt to a single type of test structure. They lack flexibility and versatility, and cannot meet the welding requirements of various parts. This application provides a welding fixture 100, such as... Figure 1 and Figure 2 As shown, the welding fixture 100 includes a base 1 and an adjustable clamp. The adjustable clamp includes multiple limiting parts and multiple mounting parts. Each limiting part is adapted to restrict the workpiece 4 to be welded. The multiple mounting parts are switchably connected to the base 1 so that at least one limiting part is in the welding position.

[0031] In other words, the adjustable fixture has multiple mounting parts, each of which can fix the adjustable fixture to the base 1. After each mounting part fixes the adjustable fixture to the base 1, the posture of the adjustable fixture in three-dimensional space will change. For example, after the adjustable fixture is installed on the base 1 through one mounting part, a limiting part can be placed in the welding position. At this time, the workpiece 4 to be welded can be placed on this welding part, and then the workpiece 4 to be welded can be welded by the welding equipment. When at least one of the shape, welding position, size, etc. of the workpiece 4 to be welded changes, this limiting part can no longer meet the installation and limiting function of the workpiece 4 to be welded. At this time, the adjustable fixture can be installed on the base 1 through another mounting part, so that the other limiting part is placed in the welding position to meet the installation and limiting requirements of the workpiece 4 to be welded. Thus, the workpiece 4 to be welded can be welded better by the welding equipment. Therefore, the welding fixture 100 of this application can reduce the welding difficulty and meet the welding requirements of different workpieces 4 to be welded. It is practical and flexible.

[0032] Furthermore, after the adjustable fixture is fixed to the base 1 by a mounting part, the two limiting parts can also be in the welding position. For example, these two limiting parts can meet the welding requirements of the workpieces 4 with different shapes, welding positions, and sizes, thereby reducing the number of mounting parts, reducing the structural complexity of the adjustable fixture, reducing the processing difficulty of the adjustable fixture, and thus reducing the production cost of the welding fixture 100. Moreover, since these two limiting parts can meet the welding requirements of the workpieces 4 with different shapes, welding positions, and sizes, the welding fixture 100 can also simultaneously perform welding operations on two workpieces 4, thereby improving welding efficiency.

[0033] According to the welding fixture 100 of the present application embodiment, the workpiece 4 to be welded can be well limited, thereby reducing the welding difficulty of the workpiece 4 to be welded. In addition, multiple mounting parts can be switched to be connected to the base 1 so that at least one limiting part is located in the welding position, which can meet the welding requirements of different workpieces 4 to be welded. It is highly practical and flexible.

[0034] In some embodiments of this application, the adjustable clamp includes: a clamp plate 2, which includes a first side, a second side 20, and at least one third side. Along a first direction X, the first side and the second side 20 are located on opposite sides of the clamp plate 2, and the third side connects between the first side and the second side 20. A plurality of mounting portions include a first mounting portion and a second mounting portion, and a plurality of limiting portions include a first limiting portion and a second limiting portion. The first mounting portion is formed by at least a portion of the first side. The clamp plate 2 is adapted to be supported on the mounting surface of the base 1 via the first side, so that the first limiting portion is located in a welding position. The second mounting portion includes a slot 21, which is formed by at least a portion of the third side recessed inward. The slot 21 is adapted to engage with the base 1, so that the second limiting portion is located in a welding position.

[0035] It should be noted that the first direction X in this application, as well as the second direction Y and the third direction Z described below, are all three directions of the fixture plate 2, and will not be elaborated upon in the following content of this application.

[0036] like Figure 1 and Figure 2 As shown, the clamp plate 2 is a cuboid plate, and the first side, the second side 20 and the four third sides constitute the plate body of the clamp plate 2.

[0037] For example, the welding equipment may include a first electrode holder and a second electrode holder, which may be located on the upper and lower sides of the workpiece 4 to be welded, respectively, so that the workpiece 4 can be welded by means of electricity. This application describes the welding equipment of this example, but it should not be construed as limiting the application.

[0038] For example, refer to Figure 1 In the example shown, the workpiece to be welded 4 may include a first workpiece to be welded 4, which may include two long strips of metal welding plates. The ends of the two metal welding plates may be stacked to form a "I" structure. The clamp plate 2 may be placed on the mounting surface of the base 1 through the first side. At this time, the second side 20 of the clamp plate 2 is the upper side of the clamp plate 2. The first limiting part may be located on the second side 20. The two metal welding plates may be placed on the second side 20. The second limiting part is used to limit the position of the metal welding plates. At this time, the welding equipment can weld the two metal welding strips well.

[0039] For example, the two long metal welding plates can also be stacked in the middle to form a "+" structure. The clamp plate 2 can be placed on the mounting surface of the base 1 through the first side. At this time, the second side 20 of the clamp plate 2 is the upper side of the clamp plate 2. The first limiting part can be located on the second side 20. The two metal welding plates can be placed on the second side 20. The second limiting part is used to limit the position of the metal welding plates. At this time, the welding equipment can weld the two metal welding strips better.

[0040] For example, the clamp plate 2 can be engaged with the base 1 via the slot 21, thereby allowing the clamp plate 2 to be arranged vertically. The workpiece to be welded 4 may include a second workpiece to be welded 4, which may include two "L"-shaped metal welding plates. The ends of the two metal welding plates may be stacked. For details, please refer to... Figure 2 As shown in the example, each “L”-shaped metal welding plate includes a vertical plate and a folded plate. The vertical plate extends in the vertical direction, and the folded plate extends in the horizontal direction. The two folded plates can be stacked in the vertical direction. The first welding bracket 31 and the second welding bracket 32 ​​can be located on the upper and lower sides of the two folded plates, respectively, which can facilitate the welding of the two folded plates by the welding equipment.

[0041] In the above example, different structures can be used to form the mounting part, so that at least one limiting part is located in the welding position, thereby better arranging the workpiece 4 to be welded on the fixture plate 2, which can meet the welding requirements of different workpieces 4 to be welded, and is highly practical and flexible.

[0042] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the base 1 includes a base plate 10. Along the first direction X, the slot 21 is formed as a through groove that passes through the clamp plate 2. The slot 21 is engaged with the outer periphery of the base plate 10.

[0043] The slot 21 has a simple snap-fit ​​structure and does not require any changes to the structure of the base 1. This can reduce the processing difficulty of the base plate 10 and the fixture plate 2. The snap-fit ​​method between the slot 21 and the base plate 10 is also simple and can be easily disassembled. Therefore, the base 1 and fixture plate 2 of this application have a simple structure and are easy to assemble and disassemble. They can better meet the welding requirements of different parts 4 to be welded, and are highly practical and flexible.

[0044] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first limiting part includes a first limiting groove 22, and a portion of the bottom wall of the first limiting groove 22 penetrates the fixture plate 2 along the first direction X to form a welding hole 24.

[0045] In other words, when two metal welding plates are arranged in the first limiting groove 22, the first limiting groove 22 can effectively limit the metal welding plates. When the two metal welding plates are stacked, the stacked position of the two metal welding plates can be vertically opposite to the weld hole 24. The first welding bracket 31 and the second welding bracket 32 ​​can be arranged on the upper and lower sides of the two metal welding plates respectively, so that the welding equipment can weld the two metal welding plates through the weld hole 24.

[0046] For example, the weld hole 24 can be a square hole or a round hole, and the size of the weld hole 24 can also be set according to actual needs. This application does not limit this.

[0047] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first limiting groove 22 extends along the second direction Y, and a plurality of first positioning members are provided in the first limiting groove 22. At least two of the first positioning members extend along the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0048] In the above technical method, the third direction Z can be the width direction of the workpiece 4 to be welded. When the width of the workpiece 4 to be welded is different, the workpieces 4 to be welded of different widths can be positioned by different first positioning members, so that the position of the workpiece 4 to be welded is more stable, which is conducive to the welding of the workpiece 4 to be welded.

[0049] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the welding fixture 100 also includes a second positioning member 25, a first positioning hole and a second positioning hole. The first positioning hole is formed as a through hole that penetrates the fixture plate 2 along the first direction X. The second positioning hole is formed on the base 1 and is disposed opposite to the first positioning hole. The second positioning member 25 is adapted to pass through the first positioning hole and the second positioning hole.

[0050] For example, the second positioning element 25 can be a positioning bolt, which can pass through the first positioning hole and the second positioning hole. For example, there can be multiple second positioning elements 25, first positioning holes, and second positioning holes, and this application does not limit this.

[0051] The above-mentioned technical method, by having the second positioning element 25 pass through the first positioning hole and the second positioning hole respectively, can better define the relative position between the fixture plate 2 and the base 1, thereby facilitating the welding equipment to weld the workpiece 4 arranged on the fixture plate 2. In addition, the matching method of the second positioning element 25, the first positioning hole and the second positioning hole is simple and easy to disassemble and assemble, which can help the welding fixture 100 to switch different postures to meet the different welding requirements of the workpiece 4.

[0052] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the second limiting part includes a second limiting groove 23, which is disposed on the first side and / or the second side 20. The second limiting groove 23 extends along the second direction Y and along the third direction Z. At least one side of the second limiting groove 23 is provided with a sliding groove, which is suitable for sliding engagement with the workpiece 4 to be welded. The first direction X, the second direction Y and the third direction Z are all perpendicular to each other.

[0053] In other words, when the workpiece 4 to be welded is placed in the second limiting groove 23, the workpiece 4 can slide within the groove. Therefore, in the first direction X, the groove can restrict the position of the workpiece 4 in the first direction X. Figure 2 As shown, the second part to be welded 4 may include two "L"-shaped metal welding plates. The "L"-shaped metal welding plates include a vertical plate and a folded plate. The vertical plate extends in the vertical direction, and the folded plate extends in the horizontal direction. The two folded plates can be stacked in the vertical direction. The first welding bracket 31 and the second welding bracket 32 ​​can be located on the upper and lower sides of the two folded plates, respectively. The sliding groove can slide and cooperate with the vertical plate. More specifically, the two "L"-shaped metal welding plates are an upper welding plate and a lower welding plate, respectively. The folded plate of the upper welding plate can be bonded to the folded plate of the lower welding plate. The vertical plate of the lower welding plate can cooperate with the sliding groove. The vertical plate of the upper welding plate may not have a corresponding sliding groove to cooperate with. When the lower welding plate is inserted downward into the sliding groove, the lower welding plate can be better limited.

[0054] In the above-mentioned technical method, the slide can be used to better position the workpiece 4 to be welded, so that the welding fixture 100 can meet the different welding requirements of the workpiece 4 to be welded. Moreover, the slide has a simple structure, which can reduce the production difficulty of the fixture plate 2.

[0055] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, along the second direction Y, the second limiting groove 23 penetrates the clamp plate 2. The clamp plate 2 also includes a first baffle and at least one second baffle. The first baffle is located at one end of the second limiting groove 23 and is used to block the opening at the end of the second limiting groove 23. The second baffle is disposed on the side of the second limiting groove 23 near the first baffle and is used to form a sliding groove with the second limiting groove 23.

[0056] In other words, when the workpiece 4 to be welded is arranged in the second limiting groove 23, the slide formed by the second baffle and the second limiting groove 23 can guide the workpiece 4 to be welded in a better way and can also limit the position of the workpiece 4 to be welded in a better way. The first baffle can limit the position of the workpiece 4 to be welded when it slides along the slide, so that the workpiece 4 to be welded can be in the predetermined welding position in a better way.

[0057] For example, there may be one or two second baffles, and the two second baffles may be located on both sides of the second limiting groove 23 respectively.

[0058] In the above-mentioned technical method, the first baffle and the second baffle have simple structures, which can guide and limit the workpiece 4 to be welded in a good way, and can also limit the position of the workpiece 4 to be welded in a good way, so that the workpiece 4 to be welded can be in the predetermined welding position, which is beneficial to the welding of the workpiece 4 to be welded.

[0059] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first baffle also has a flange that folds towards the other end of the second limiting groove 23 to form a slot with the second limiting groove 23, so as to allow the end of the workpiece 4 to be welded to be inserted into the slot.

[0060] In other words, when the workpiece 4 to be welded slides along the slide to be assembled in the second limiting groove 23, the end of the workpiece 4 to be welded can abut against the first baffle and be inserted into the slot. The slot can better limit the end of the workpiece 4 to be welded. Combined with the limiting of the workpiece 4 by the slide and the second limiting groove 23, the position of the workpiece 4 to be welded is relatively stable, which is conducive to the welding equipment welding the workpiece 4 to be welded.

[0061] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, a plurality of third positioning elements are provided in the second limiting groove 23, with at least two third positioning elements arranged at intervals along the third direction Z.

[0062] In other words, along the third direction Z, for weldable parts 4 of different widths, the third positioning part can be used to weld the weldable parts 4, thereby meeting the positioning requirements of weldable parts 4 of different widths and thus facilitating the welding operation of the weldable parts 4.

[0063] In some embodiments of this application, the clamping plate 2 can be a one-piece molded part. For example, the clamping plate 2 can be a one-piece molded metal plate. For example, the clamping plate 2 can be formed by stamping, 3D printing, etc. This application does not impose any restrictions.

[0064] Other configurations and operations of the welding fixture 100 according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0065] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding fixture (100), characterized in that, include: Base (1); An adjustable clamp includes multiple limiting parts and multiple mounting parts, each of the limiting parts being adapted to restrict the workpiece to be welded (4), and the multiple mounting parts being switchably connected to the base (1) to position at least one of the limiting parts in the welding position.

2. The welding fixture (100) according to claim 1, characterized in that, The adjustable clamp includes a clamp plate (2), which includes a first side, a second side (20), and at least one third side. Along a first direction (X), the first side and the second side (20) are located on opposite sides of the clamp plate (2), and the third side is connected between the first side and the second side (20). The plurality of mounting portions include a first mounting portion and a second mounting portion, and the plurality of limiting portions include a first limiting portion and a second limiting portion. The first mounting portion is formed by at least a portion of the first side surface, and the clamp plate (2) is adapted to be supported on the mounting surface of the base (1) by the first side surface so that the first limiting portion is in the welding position; The second mounting portion includes a slot (21) formed by at least a partial recess of the third side surface, the slot (21) being adapted to engage with the base (1) so that the second limiting portion is in the welding position.

3. The welding fixture (100) according to claim 2, characterized in that, The base (1) includes a base plate (10). Along the first direction (X), the slot (21) is formed as a through slot that passes through the clamp plate (2). The slot (21) engages with the outer periphery of the base plate (10).

4. The welding fixture (100) according to claim 2, characterized in that, The first limiting part includes a first limiting groove (22), and a portion of the bottom wall of the first limiting groove (22) penetrates the fixture plate (2) along the first direction (X) to form a welding hole (24).

5. The welding fixture (100) according to claim 4, characterized in that, The first limiting groove (22) extends along the second direction (Y), and a plurality of first positioning members are provided in the first limiting groove (22). At least two of the first positioning members extend along the third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

6. The welding fixture (100) according to claim 2, characterized in that, It also includes a second positioning element (25), a first positioning hole and a second positioning hole. The first positioning hole is formed as a through hole that passes through the clamp plate (2) along the first direction (X). The second positioning hole is formed on the base (1) and is disposed opposite to the first positioning hole. The second positioning element (25) is adapted to pass through the first positioning hole and the second positioning hole.

7. The welding fixture (100) according to claim 2, characterized in that, The second limiting part includes a second limiting groove (23), which is disposed on the first side and / or the second side (20). The second limiting groove (23) extends along the second direction (Y) and along the third direction (Z). At least one side of the second limiting groove (23) is provided with a sliding groove, which is adapted to slide with the workpiece to be welded (4). The first direction (X), the second direction (Y) and the third direction (Z) are all perpendicular to each other.

8. The welding fixture (100) according to claim 7, characterized in that, Along the second direction (Y), the second limiting groove (23) penetrates the clamp plate (2). The clamp plate (2) also includes a first baffle and at least one second baffle. The first baffle is located at one end of the second limiting groove (23) and is used to block the opening at the end of the second limiting groove (23). The second baffle is disposed on the side of the second limiting groove (23) near the first baffle and is used to form the sliding groove with the second limiting groove (23).

9. The welding fixture (100) according to claim 8, characterized in that, The first baffle also has a flange that folds toward the other end of the second limiting groove (23) to form a slot with the second limiting groove (23) to allow the end of the workpiece (4) to be welded to be inserted into the slot.

10. The welding fixture (100) according to claim 7, characterized in that, The second limiting groove (23) is provided with a plurality of third positioning elements, and at least two of the third positioning elements are arranged at intervals along the third direction (Z).

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