Welding fixing device

Abstract

The invention provides a welding fixing device. The welding fixing device comprises a supporting piece; the first positioning assembly is arranged on the supporting piece and used for positioning the first to-be-welded piece in the first preset direction and the second preset direction; wherein a preset included angle is formed between the first preset direction and the second preset direction; the first clamping assembly is arranged on the supporting piece, and at least part of the first clamping assembly is movably arranged so as to clamp or release the first to-be-welded piece; the second positioning assembly is arranged on the supporting piece and used for positioning a second to-be-welded piece in the first preset direction and the second preset direction; and the second clamping assembly is arranged on the supporting piece, and at least part of the second clamping assembly is movably arranged so as to clamp or release a second piece to be welded. The welding fixing device solves the problem that in the prior art, a welding clamp cannot guarantee the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, and in particular to a welding fixture. Background Art

[0002] At present, some product structures use closed box-shaped parts as connectors. For closed box-shaped parts, multiple non-porous plates are usually assembled and then welded to achieve fixed connection between the multiple non-porous plates. Since the box-shaped workpiece is a closed box, it is difficult to weld the internal connections of all the non-porous plates that constitute the workpiece, which results in the lack of internal welds between some non-porous plates, and then the integrity and load-bearing capacity of the closed box-shaped parts are relatively poor. Therefore, ensuring welding quality is particularly important for producing closed box-shaped parts with qualified quality.

[0003] However, current welding fixtures cannot guarantee welding quality and have a low degree of automation, resulting in low production efficiency and high labor intensity. Summary of the invention

[0004] The main purpose of the present invention is to provide a welding fixture to solve the problem that the welding fixture in the prior art cannot ensure the welding quality.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a welding fixture, comprising: a support member; a first positioning assembly, which is arranged on the support member and is used to position a first part to be welded in a first preset direction and a second preset direction; wherein the first preset direction and the second preset direction are arranged at a preset angle; a first clamping assembly, which is arranged on the support member, and at least a part of the first clamping assembly is movably arranged to clamp or release the first part to be welded; a second positioning assembly, which is arranged on the support member and is used to position a second part to be welded in the first preset direction and the second preset direction; a second clamping assembly, which is arranged on the support member, and at least a part of the second clamping assembly is movably arranged to clamp or release the second part to be welded.

[0006] Furthermore, the first positioning assembly includes a first stop block and a second stop block, both of which are arranged on the support member, the first stop block is used to abut against the first side surface of the first part to be welded to position the first part to be welded in a first preset direction; the second stop block is used to abut against the second side surface of the first part to be welded to position the first part to be welded in a second preset direction.

[0007] Furthermore, the first positioning assembly includes at least two first stops, and the at least two first stops are sequentially arranged along the second preset direction.

[0008] Furthermore, the first clamping assembly includes a clamping member and a first driving member, the first driving member is arranged on the supporting member, and the first driving member is drivingly connected to the clamping member to drive at least a portion of the clamping member to move toward or away from the supporting member to clamp or release the first part to be welded.

[0009] Furthermore, the first clamping assembly also includes a connecting seat, which is spaced apart from the output end of the first driving member; the output end of the first driving member is movably arranged in the vertical direction; one end of the clamping member is rotatably connected to the output end of the first driving member, and the clamping member is rotatably connected to the connecting seat and the connection between the two is located between the two ends of the clamping member.

[0010] Furthermore, the welding fixture comprises two first clamping assemblies, which are arranged opposite to each other to clamp two ends of the first workpiece to be welded.

[0011] Furthermore, the second positioning assembly includes a first supporting portion and a second supporting portion, both of which are connected to the supporting member, the first supporting portion is used to abut against the third side surface of the second part to be welded to position the second part to be welded in a first preset direction; the second supporting portion is used to abut against the fourth side surface of the second part to be welded to position the second part to be welded in a second preset direction.

[0012] Furthermore, the second positioning assembly includes at least two first supporting portions, and the at least two first supporting portions are sequentially arranged along the second preset direction.

[0013] Furthermore, the second clamping assembly includes a pressure plate and a second driving member, the pressure plate and the first support portion are arranged relative to each other in a first preset direction; the second driving member is arranged on the support portion, and the second driving member is driven and connected to the pressure plate to drive the pressure plate to move along the first preset direction toward or away from the first support portion to clamp or release the second part to be welded.

[0014] Furthermore, the second clamping assembly also includes a limit block and a limit rod, the limit block is arranged on the support member; one end of the limit rod is connected to the second driving member, and the other end of the limit rod is connected to the pressure plate, and the limit rod is passed through the limit rod and is movably arranged along the first preset direction.

[0015] According to the technical solution of the present invention, the welding fixture comprises a support, a first positioning assembly, a first clamping assembly, a second positioning assembly and a second clamping assembly. The first positioning assembly, the first clamping assembly, the second positioning assembly and the second clamping assembly are all arranged on the support. The first positioning assembly and the first clamping assembly cooperate with each other, and can position the first part to be welded in the first preset direction and the second preset direction, and can clamp the first part to be welded, so that the first part to be welded is in the first fixed position; the second positioning assembly and the second clamping assembly cooperate with each other, and can position the second part to be welded in the first preset direction and the second preset direction, and can clamp the second part to be welded, so that the second part to be welded is in the second fixed position; then, the first part to be welded and the second part to be welded are welded by welding methods such as welding gun and laser welding. It can be seen that the welding fixture can position and install the first part to be welded and the second part to be welded, and can complete the welding work of the first part to be welded and the second part to be welded in the welding fixture, improve the welding accuracy and welding quality, and is conducive to improving production efficiency and reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 An axonometric view showing an embodiment of a welding fixture according to the present invention;

[0018] Figure 2 A front view showing an embodiment of a welding fixture according to the present invention;

[0019] Figure 3 A side view showing an embodiment of a welding fixture according to the present invention;

[0020] Figure 4 A top view showing an embodiment of a welding fixture according to the present invention is shown;

[0021] Figure 5 An isometric view showing a first workpiece to be welded and a second workpiece to be welded according to a welding fixture of the present invention;

[0022] Figure 6 A front view of a first workpiece to be welded and a second workpiece to be welded according to a welding fixture of the present invention is shown;

[0023] Figure 7 A side view of a first workpiece to be welded and a second workpiece to be welded according to a welding fixture of the present invention is shown;

[0024] Figure 8A top view of a first workpiece to be welded and a second workpiece to be welded according to a welding fixture of the present invention is shown;

[0025] Fig. 9 A top view of a support plate of a welding fixture according to the present invention is shown;

[0026] Fig.10 A front view showing a support plate of a welding fixture according to the present invention;

[0027] Fig.11 An axonometric view showing a third support frame of the welding fixture according to the present invention;

[0028] Fig.12 A front view showing a third support frame of the welding fixture according to the present invention;

[0029] Fig.13 A side view showing a third support frame of the welding fixture according to the present invention;

[0030] Fig.14 A top view of a third support frame of the welding fixture according to the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Support member; 11. Support plate; 12. First support frame; 13. Second support frame;

[0033] 20. First positioning assembly; 21. First stopper; 22. Second stopper;

[0034] 30. The first part to be welded;

[0035] 40. first clamping assembly; 41. clamping member; 42. first driving member; 43. connecting seat;

[0036] 50. second positioning assembly; 51. first supporting portion; 52. second supporting portion;

[0037] 60. The second part to be welded;

[0038] 70. second clamping assembly; 71. pressing plate; 72. second driving member; 73. limiting block; 74. limiting rod;

[0039] 80. The third support frame. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] The present invention provides a welding fixing device, please refer to Figures 1 to 14 , including: a support member 10; a first positioning assembly 20, which is arranged on the support member 10 and is used to position the first part to be welded 30 in a first preset direction and a second preset direction; wherein the first preset direction and the second preset direction are set at a preset angle; a first clamping assembly 40, which is arranged on the support member 10, and at least a part of the first clamping assembly 40 is movably arranged to clamp or release the first part to be welded 30; a second positioning assembly 50, which is arranged on the support member 10 and is used to position the second part to be welded 60 in the first preset direction and the second preset direction; a second clamping assembly 70, which is arranged on the support member 10, and at least a part of the second clamping assembly 70 is movably arranged to clamp or release the second part to be welded 60.

[0044] The welding and fixing device of the present invention includes a support member 10, a first positioning component 20, a first clamping component 40, a second positioning component 50 and a second clamping component 70. The first positioning component 20, the first clamping component 40, the second positioning component 50 and the second clamping component 70 are all arranged on the support member 10. The first positioning component 20 and the first clamping component 40 cooperate with each other, and can position the first part to be welded 30 in the first preset direction and the second preset direction, and can clamp the first part to be welded 30 so that the first part to be welded 30 is in the first fixed position; the second positioning component 50 and the second clamping component 70 cooperate with each other, and can position the second part to be welded 60 in the first preset direction and the second preset direction, and can clamp the second part to be welded 60 so that the second part to be welded 60 is in the second fixed position; then, the fixed first part to be welded 30 and the second part to be welded 60 are welded by welding methods such as welding gun and laser welding. It can be seen that the welding fixture can be used to position and install the first part to be welded 30 and the second part to be welded 60, and the welding work of the first part to be welded 30 and the second part to be welded 60 can be completed in the welding fixture, thereby improving the welding accuracy and welding quality, and is beneficial to improving production efficiency and reducing labor intensity.

[0045] Specifically, the first preset direction is arranged perpendicular to the second preset direction.

[0046] In specific implementation, in the welding production process, the welding time required is relatively small, while more than two-thirds of the total processing time is used for material preparation, assembly and other auxiliary work, which greatly affects the welding production speed. The welding fixture accurately positions and reliably clamps the welded parts, facilitates the assembly and welding of the welded parts, and ensures the process equipment required for the structural accuracy of the welded parts. The welding fixture plays an important role in improving product quality, reducing the labor intensity of workers, and accelerating the mechanization and automation process of welding production.

[0047] Specifically, the first part to be welded 30 is the bottom plate of the box, and the second part to be welded 60 is the main body of the box, that is, a frame composed of four side plates.

[0048] In the specific implementation, from the welding aspect, only by ensuring that the parts and components have the correct relative position can the welded box meet the use requirements. The welding fixture can position and clamp the parts of the box to ensure the above requirements.

[0049] In order to position the first part to be welded 30 in the first preset direction and the second preset direction, the first positioning assembly 20 includes a first stop block 21 and a second stop block 22. The first stop block 21 and the second stop block 22 are both arranged on the support member 10. The first stop block 21 is used to abut against the first side surface of the first part to be welded 30 to position the first part to be welded 30 in the first preset direction; the second stop block 22 is used to abut against the second side surface of the first part to be welded 30 to position the first part to be welded 30 in the second preset direction.

[0050] In this embodiment, the first positioning assembly 20 includes at least two first stoppers 21, and the at least two first stoppers 21 are sequentially arranged along the second preset direction. Such an arrangement can reliably position the first to-be-welded member 30 in the first preset direction.

[0051] In this embodiment, the first clamping assembly 40 includes a clamping member 41 and a first driving member 42, and the first driving member 42 is disposed on the support member 10. The first driving member 42 is drivingly connected to the clamping member 41 to drive at least a portion of the clamping member 41 to move toward or away from the support member 10 to clamp or release the first workpiece to be welded 30. Such a setting enables the first workpiece to be welded 30 to be clamped between the clamping member 41 and the support member 10 by the clamping member 41 after the first workpiece to be welded 30 is placed on the support member 10, thereby fixing the first workpiece to be welded 30.

[0052] Optionally, the first driving member 42 is a cylinder.

[0053] In order to achieve the clamping member 41 clamping the first workpiece to be welded 30, the first clamping assembly 40 further includes a connecting seat 43, which is spaced apart from the output end of the first driving member 42; the output end of the first driving member 42 is movably arranged in the vertical direction; one end of the clamping member 41 is rotatably connected to the output end of the first driving member 42, and the clamping member 41 is rotatably connected to the connecting seat 43 and the connection between the two is located between the two ends of the clamping member 41. The other end of the clamping member 41 cooperates with the supporting member 10 to clamp the first workpiece to be welded 30.

[0054] Optionally, the welding fixture includes two first clamping assemblies 40, which are arranged opposite to each other to clamp two ends of the first workpiece to be welded 30. Such an arrangement further improves the fixing effect of the first workpiece to be welded 30.

[0055] In order to position the second part to be welded 60 in the first preset direction and the second preset direction, the second positioning assembly 50 includes a first support portion 51 and a second support portion 52, both of which are connected to the support member 10, and the first support portion 51 is used to abut against the third side surface of the second part to be welded 60 to position the second part to be welded 60 in the first preset direction; the second support portion 52 is used to abut against the fourth side surface of the second part to be welded 60 to position the second part to be welded 60 in the second preset direction.

[0056] Optionally, the first support portion 51 and the second support portion 52 are both columnar structures.

[0057] In this embodiment, the second positioning assembly 50 includes at least two first support portions 51, and the at least two first support portions 51 are sequentially arranged along the second preset direction. Such an arrangement can reliably position the second to-be-welded member 60 in the first preset direction.

[0058] In this embodiment, the second clamping assembly 70 includes a pressing plate 71 and a second driving member 72, the pressing plate 71 and the first supporting portion 51 are arranged relative to each other in a first preset direction; the second driving member 72 is arranged on the supporting member 10, and the second driving member 72 is drivingly connected to the pressing plate 71 to drive the pressing plate 71 to move in the first preset direction toward or away from the first supporting portion 51 to clamp or release the second part to be welded 60. Such an arrangement enables the second part to be welded 60 to be clamped between the pressing plate 71 and the first supporting portion 51 by using the pressing plate 71 after the second part to be welded 60 is placed on the first part to be welded 30, thereby fixing the second part to be welded 60.

[0059] Optionally, the second driving member 72 is a cylinder.

[0060] In this embodiment, the second clamping assembly 70 further includes a limit block 73 and a limit rod 74, wherein the limit block 73 is disposed on the support member 10; one end of the limit rod 74 is connected to the second driving member 72, and the other end of the limit rod 74 is connected to the pressing plate 71, and the limit rod 74 is penetrated on the limit rod 74 and is movably disposed along the first preset direction. Such a configuration can guide and limit the movement path of the pressing plate 71.

[0061] In this embodiment, the support member 10 includes a support plate 11, a first support frame 12 and a second support frame 13. The first support frame 12 and the second support frame 13 are arranged on the support plate 11 at intervals. The first positioning assembly 20 and the second positioning assembly 50 are both arranged on the first support frame 12. The first support frame 12 is used to support the first part to be welded 30 and the second part to be welded 60; the first clamping assembly 40 is arranged on the support plate 11, and the second clamping assembly 70 is arranged on the second support frame 13 to ensure that the pressure plate 71 is arranged higher than the clamping member 41.

[0062] In this embodiment, the first support portion 51 is installed on the first support frame 12 through the third support frame 80 , and the two first support portions 51 are arranged on the third support frame 80 at intervals.

[0063] The present invention solves the following technical problems: 1. Accurate and reliable positioning and clamping can reduce or even eliminate the work of cutting and marking, reduce the dimensional tolerance of the product, and improve the accuracy and interchangeability of parts. After using the welding fixture, a lot of auxiliary work time can be saved, such as marking, alignment, measurement, spot fixing, turning over the workpiece, etc. As long as the welding fixture is used correctly, the auxiliary time can generally be reduced by 50-90%, so the output can be increased. 2. Effectively prevent and reduce welding deformation. When a weldment is welded in a free state, it will generally deform after welding. The welding fixture can be used to accurately position and firmly clamp the weldment. During welding, its deformation is limited, especially for weldments with high dimensional accuracy requirements, which cannot meet the technical requirements without the use of the welding fixture. 3. The weldment to be welded is in the best welding position, the weld has good formability, the process defects are significantly reduced, and the welding speed is improved. 4. Mechanical devices are used instead of hands to complete the heavy work of positioning, clamping and turning over the weldment to be welded, thereby improving the working conditions of workers. 5. It can expand the scope of application of advanced process methods and promote the comprehensive development of mechanization and automation of welding structure production. The labor intensity of completing the work by hand is high, and it is impossible and unsafe to turn the workpiece by manpower during welding. Using a light and flexible welding fixture to replace manual positioning, clamping, and turning the workpiece can improve the working conditions of workers.

[0064] The beneficial effects of the present invention include: the welding fixture plays a role, reducing the consumption of assembly and welding time, thereby increasing production; due to the improved quality, the process of correcting deformation or repairing process defects after welding can be reduced or eliminated, shortening the production cycle of the entire product.

[0065] The welding fixture of the present invention can clamp a group of workpieces with similar characteristics, can be suitable for high-precision welding fixtures for fine processing, can be suitable for new welding fixtures of various modern manufacturing techniques, and selects high-efficiency clamping equipment with hydraulic stations as power sources to further reduce labor intensity and improve labor productivity.

[0066] In specific implementation, the welding fixture can fix the box body. Among all the parts of the box body, the box body assembly is extremely important. When welding, one hand is required to hold the side panel to be welded, and the other hand is required to hold the welding gun to spot weld the part to be welded. The welding accuracy and welding quality are difficult to guarantee. Due to the limitations of welding height and weldment weight, the welding and welding of the four side panels and the bottom plate cannot be completed in the tooling. Then, we need the welding fixture to position and clamp the parts of the box body. From the welding point of view, only by ensuring that the parts and components have the correct relative position can the welded box body meet the use requirements. The welding fixture can accurately position and clamp the parts of the box body while having a simple structure, and also improves the welding efficiency.

[0067] In specific implementation, the welding box is mainly composed of a bottom plate and four side plates, wherein the bottom plate surface is designed with mounting holes, and the side plates are designed with inner holes and threaded holes. Each plane, inner hole and threaded hole needs to be machined after welding is completed. First, the four side plates are welded into a whole, and then the whole is welded to the bottom plate.

[0068] The advantages of the welding fixture of the present invention over the traditional welding fixture include: first, it realizes automatic positioning of the bottom plate and side plate welded parts to be welded; second, there is no need to hold the side plate welded parts to be welded and the bottom plate for welding; third, the electric welding work of the bottom plate and the welding side plate can be completed in the device; therefore, the present device not only reduces labor intensity, improves welding accuracy and welding quality, but also improves production efficiency.

[0069] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0070] The welding and fixing device of the present invention includes a support member 10, a first positioning component 20, a first clamping component 40, a second positioning component 50 and a second clamping component 70. The first positioning component 20, the first clamping component 40, the second positioning component 50 and the second clamping component 70 are all arranged on the support member 10. The first positioning component 20 and the first clamping component 40 cooperate with each other, and can position the first part to be welded 30 in the first preset direction and the second preset direction, and can clamp the first part to be welded 30 so that the first part to be welded 30 is in the first fixed position; the second positioning component 50 and the second clamping component 70 cooperate with each other, and can position the second part to be welded 60 in the first preset direction and the second preset direction, and can clamp the second part to be welded 60 so that the second part to be welded 60 is in the second fixed position; then, the fixed first part to be welded 30 and the second part to be welded 60 are welded by welding methods such as welding gun and laser welding. It can be seen that the welding fixture can be used to position and install the first part to be welded 30 and the second part to be welded 60, and the welding work of the first part to be welded 30 and the second part to be welded 60 can be completed in the welding fixture, thereby improving the welding accuracy and welding quality, and is beneficial to improving production efficiency and reducing labor intensity.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding fixture, characterized in that: include: Support member (10); A first positioning assembly (20) is arranged on the support member (10) and is used to position the first to-be-welded member (30) in a first preset direction and a second preset direction; wherein the first preset direction and the second preset direction are arranged at a preset angle; A first clamping assembly (40) is arranged on the support member (10), and at least a portion of the first clamping assembly (40) is movably arranged to clamp or release the first part to be welded (30); A second positioning assembly (50) is arranged on the support member (10) and is used to position the second member to be welded (60) in the first preset direction and the second preset direction; A second clamping assembly (70) is arranged on the supporting member (10), and at least a part of the second clamping assembly (70) is movably arranged to clamp or release the second member to be welded (60).

2. The welding fixture according to claim 1, characterized in that: The first positioning assembly (20) comprises a first stopper (21) and a second stopper (22), wherein the first stopper (21) and the second stopper (22) are both arranged on the support member (10), wherein the first stopper (21) is used to abut against a first side surface of the first part to be welded (30) so as to position the first part to be welded (30) in the first preset direction; and the second stopper (22) is used to abut against a second side surface of the first part to be welded (30) so as to position the first part to be welded (30) in the second preset direction.

3. The welding fixture according to claim 2, characterized in that: The first positioning assembly (20) comprises at least two first stoppers (21), and the at least two first stoppers (21) are arranged in sequence along the second preset direction.

4. The welding fixture according to claim 1, characterized in that: The first clamping assembly (40) comprises a clamping member (41) and a first driving member (42), wherein the first driving member (42) is disposed on the supporting member (10), and the first driving member (42) is drivingly connected to the clamping member (41) to drive at least a portion of the clamping member (41) to move toward or away from the supporting member (10) to clamp or release the first member to be welded (30).

5. The welding fixture according to claim 4, characterized in that: The first clamping assembly (40) further comprises a connecting seat (43), wherein the connecting seat (43) is spaced apart from an output end of the first driving member (42); The output end of the first driving member (42) is movably arranged in the vertical direction; one end of the clamping member (41) is rotatably connected to the output end of the first driving member (42); the clamping member (41) is rotatably connected to the connecting seat (43) and the connection point between the two is located between the two ends of the clamping member (41).

6. The welding fixture according to claim 4, characterized in that: The welding fixture comprises two first clamping assemblies (40), and the two first clamping assemblies (40) are arranged opposite to each other to clamp two ends of the first workpiece (30) to be welded.

7. The welding fixture according to any one of claims 1 to 6, characterized in that: The second positioning assembly (50) comprises a first supporting portion (51) and a second supporting portion (52), wherein the first supporting portion (51) and the second supporting portion (52) are both connected to the supporting member (10), wherein the first supporting portion (51) is used to abut against a third side surface of the second member to be welded (60) so as to position the second member to be welded (60) in the first preset direction; and the second supporting portion (52) is used to abut against a fourth side surface of the second member to be welded (60) so as to position the second member to be welded (60) in the second preset direction.

8. The welding fixture according to claim 7, characterized in that: The second positioning assembly (50) comprises at least two of the first supporting parts (51), and the at least two of the first supporting parts (51) are arranged in sequence along the second preset direction.

9. The welding fixture according to claim 7, characterized in that: The second clamping assembly (70) comprises a pressing plate (71) and a second driving member (72), wherein the pressing plate (71) and the first supporting portion (51) are arranged relative to each other in the first preset direction; the second driving member (72) is arranged on the supporting portion (10), and the second driving member (72) is drivingly connected to the pressing plate (71) to drive the pressing plate (71) to move along the first preset direction toward or away from the first supporting portion (51) to clamp or release the second part to be welded (60).

10. The welding fixture according to claim 9, characterized in that: The second clamping assembly (70) further comprises a limit block (73) and a limit rod (74), wherein the limit block (73) is arranged on the support member (10); one end of the limit rod (74) is connected to the second driving member (72), and the other end of the limit rod (74) is connected to the pressure plate (71); the limit rod (74) is passed through the limit rod (74) and is movably arranged along the first preset direction.

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