Welding positioning jig

Abstract

A welding positioning jig comprises a base which is provided with an abutting part for positioning a first workpiece and a positioning pin for positioning a second workpiece and enabling the second workpiece to be in lap joint with the first workpiece; the abutting mechanism comprises an abutting piece rotationally connected to the base and an elastic piece arranged on the base and located on the side, away from the abutting portion, of the abutting piece, the two ends of the elastic piece abut against the base and the abutting piece respectively, and the elastic piece drives the abutting piece to be close to the abutting portion so that the first workpiece can abut against the abutting portion; the jacking mechanism is arranged on the side, away from the abutting portion, of the base, the jacking mechanism and the abutting mechanism are arranged in a spaced mode, the jacking mechanism penetrates through the base and abuts against the side, away from the elastic piece, of the abutting piece, and the jacking mechanism abuts against the abutting piece to rotate so that the abutting piece can be away from the abutting portion. According to the welding positioning jig, the first workpiece and the second workpiece are automatically positioned, manual operation is not needed, the positioning efficiency of the welding positioning jig is improved, and the problem of workpiece deformation caused by manual operation is also avoided.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece clamping, and in particular to a welding positioning fixture. Background Art

[0002] When laser welding a workpiece, it is usually necessary to clamp the workpiece on a clamping fixture before welding. In the current clamping process, the workpiece needs to be placed on the clamping fixture first, and then the handle is manually operated to fix the workpiece. Since manual operation is often required during the welding process, not only is the clamping and positioning efficiency of the workpiece low, but the operating force is difficult to control during the operation, resulting in a high probability of deformation and damage to the workpiece. Utility Model Content

[0003] In view of the above, it is necessary to propose a welding positioning fixture to improve the workpiece clamping efficiency and reduce the probability of workpiece deformation and damage.

[0004] The embodiment of the present application provides a welding positioning fixture for positioning a first workpiece and a second workpiece, the welding positioning fixture comprising a base, the base having an abutment portion and a positioning pin arranged at intervals, the abutment portion positioning the first workpiece, the positioning pin positioning the second workpiece and making the second workpiece overlap the first workpiece; a supporting mechanism comprising a supporting member rotatably connected to the base and an elastic member arranged on the base and located on a side of the supporting member away from the abutment portion, the two ends of the elastic member respectively abutting against the base and the abutment portion, the elastic member driving the abutment portion to approach the abutment portion to press the first workpiece against the abutment portion; a lifting mechanism, arranged on a side of the base away from the abutment portion and spaced from the abutment mechanism, the lifting mechanism passing through the base and abutting against a side of the abutment portion away from the elastic member, the lifting mechanism pushing the abutment portion to rotate so that the abutment portion is away from the abutment portion.

[0005] When using the above-mentioned welding positioning jig, the lifting mechanism passes through the base and pushes the abutting member to rotate so that the abutting member is away from the abutting portion, and the first workpiece is placed on the base at this time. The lifting mechanism is driven away from the abutting member, and the abutting member is reset and close to the abutting portion under the action of the elastic member, so that the abutting member presses the first workpiece against the abutting portion, thereby positioning the first workpiece. The second workpiece is placed on the first workpiece, and the positioning pin is inserted into the second workpiece to position the second workpiece. Since the abutting member of the welding positioning jig automatically gives way and presses against the first workpiece when positioning the first workpiece, no manual operation is required, which not only improves the clamping efficiency of the workpiece, but also reduces the labor intensity of the operator, and avoids the positioning deformation of the workpiece caused by excessive operating force. When positioning the second workpiece, only the positioning pin needs to be inserted into the second workpiece to keep the relative position of the first workpiece and the second workpiece unchanged, so that the first workpiece and the second workpiece are accurately welded together, and the operation is simple and quick.

[0006] In some embodiments, the lifting mechanism includes a lifting driving member disposed on a side of the base away from the abutting portion and a lifting member connected to the lifting driving member. The lifting member is inserted into the base and abuts against a side of the abutting member away from the elastic member. The lifting driving member drives the lifting member to push the abutting member to rotate.

[0007] In some embodiments, the lifting member includes a lifting seat connected to the lifting drive member and a lifting block connected to the lifting seat, the lifting block is inserted into the base and abuts against a side of the supporting member away from the elastic member, and the lifting drive member drives the lifting seat to drive the lifting block to push the supporting member to rotate in a direction away from the abutting portion.

[0008] In some embodiments, the lifting member further includes a guide block connected to the lifting seat, the guide block is spaced apart from the lifting block, and the guide block is slidably inserted into the base, and the guide block guides the moving direction of the lifting block.

[0009] In some embodiments, a side of the abutting member facing away from the abutting portion is provided with an arc chamfer.

[0010] In some embodiments, the welding positioning fixture also includes a pressing mechanism, which includes a pressing assembly covering the abutting portion and the positioning pin and a locking assembly provided on the base, the pressing assembly presses the second workpiece against the first workpiece, and the locking assembly abuts against a side of the pressing assembly away from the base to lock the pressing assembly to the base.

[0011] In some embodiments, the pressing assembly includes a cover plate and a pressing module elastically disposed on the side of the cover plate facing the base, the cover plate abuts against the base and covers the abutting portion and the positioning pin, and the pressing module elastically presses the second workpiece against the first workpiece.

[0012] In some embodiments, the pressing module includes a pressing member slidably arranged on the cover plate and a buffer member arranged between the pressing member and the cover plate, the two ends of the buffer member respectively abut against the cover plate and the pressing member, and the buffer member drives the pressing member to elastically abut against the second workpiece.

[0013] In some embodiments, the locking assembly includes a locking drive member provided on the base and a locking member connected to the locking drive member, wherein the locking member is located on one side of the cover plate, and the locking drive member drives the locking member to rotate and press against the side of the cover plate away from the base to press the cover plate tightly against the base.

[0014] In some embodiments, the base includes a bottom plate, a substrate spaced apart from the bottom plate, and a plurality of pillars connecting the bottom plate and the substrate, the abutment portion and the positioning pin are both located on the side of the substrate away from the bottom plate, the abutment member is rotatably connected to the substrate, the two ends of the elastic member are respectively abutted against the abutment member and the substrate, the lifting mechanism is provided on the side of the bottom plate facing the substrate, and the lifting mechanism passes through the substrate to abut against the abutment member. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the welding positioning fixture provided in an embodiment of the present application.

[0016] Figure 2 yes Figure 1 An enlarged schematic diagram of area II in the welding positioning fixture is shown.

[0017] Figure 3 yes Figure 1 An exploded schematic diagram of the base, locking assembly and supporting mechanism in the welding positioning fixture is shown.

[0018] Figure 4 yes Figure 1 The cross-sectional schematic diagram of the base, the supporting mechanism and the lifting mechanism in the welding positioning fixture shown is along the IV-IV direction.

[0019] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure of the supporting mechanism in the welding positioning fixture is shown.

[0020] Figure 6 yes Figure 1A schematic diagram of the three-dimensional structure of the lifting mechanism in the welding positioning fixture is shown.

[0021] Figure 7 yes Figure 1 The exploded schematic diagram of the pressing assembly in the welding positioning fixture is shown.

[0022] Figure 8 yes Figure 1 The schematic cross-sectional view of the pressing component in the welding positioning fixture along the VIII-VIII direction is shown.

[0023] Description of the main component symbols: welding positioning fixture 100, base 10, bottom plate 11, base plate 12, abutment portion 121, positioning pin 122, guide column 123, accommodating hole 124, buckle plate 125, pillar 13, rotating shaft 14, holding mechanism 20, holding member 21, arc chamfer 211, elastic member 22, lifting mechanism 30, lifting drive member 31, lifting member 32, lifting seat 321, lifting block 322, guide block 323, pressing mechanism 40, pressing assembly 41, cover plate 411, pressing module 412, groove 413, pressing member 414, buffer member 415, sliding hole 416, limiting portion 417, mounting groove 418, locking assembly 42, locking drive member 421, locking member 422, first workpiece 200, second workpiece 300. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 and Figure 2 The embodiment of the present application provides a welding positioning fixture 100. The welding positioning fixture 100 positions a first workpiece 200 and a second workpiece 300 that overlap each other to ensure that the first workpiece 200 and the second workpiece 300 are accurately welded together.

[0029] For ease of understanding, Figure 1 A three-dimensional coordinate system is established for auxiliary explanation, and the directions of the X-axis, Y-axis and Z-axis are shown in the figure, and the X-axis, Y-axis and Z-axis are perpendicular to each other. Among them, the X-axis direction is the width direction of the welding positioning fixture 100, the Y-axis direction is the length direction of the welding positioning fixture 100, and the Z-axis direction is the height direction of the welding positioning fixture 100.

[0030] The welding positioning fixture 100 includes a base 10, a supporting mechanism 20 disposed on the base 10, a lifting mechanism 30 disposed on the base 10 and located below the supporting mechanism 20, and a pressing mechanism 40 covered on the base 10. The base 10 carries and positions the first workpiece 200, a part of the structure of the second workpiece 300 is overlapped on the first workpiece 200, and the base 10 positions another part of the structure of the second workpiece 300. The supporting mechanism 20 presses the first workpiece 200 on the base 10 to prevent the position of the first workpiece 200 from shifting. A part of the structure of the lifting mechanism 30 passes through the base 10 and pushes the supporting mechanism 20 to keep the supporting mechanism 20 away from the first workpiece 200, so that the supporting mechanism 20 releases the first workpiece 200. The pressing mechanism 40 is covered on the base 10 and abuts the second workpiece 300 to press the second workpiece 300 against the first workpiece 200.

[0031] See also Figure 1 and Figure 2The base 10 includes a bottom plate 11, a base plate 12 spaced apart from the bottom plate 11, and a plurality of pillars 13 connecting the bottom plate 11 and the base plate 12. The bottom plate 11 is a rectangular plate structure, the base plate 12 is a stepped plate structure, the number of the pillars 13 is four, the four pillars 13 are located at the four end corners of the bottom plate 11, and the two ends of the four pillars 13 are connected to the bottom plate 11 and the base plate 12 respectively.

[0032] The base plate 12 of the base 10 is provided with abutting portions 121 and positioning pins 122 arranged at intervals. The abutting portions 121 and the positioning pins 122 are both located on the side of the base plate 12 away from the bottom plate 11. The positioning pins 122 are protruding from one side of the abutting portion 121, and the number of the abutting portions 121 and the positioning pins 122 can be multiple, so as to position multiple first workpieces 200 and second workpieces 300. In this embodiment, the number of the abutting portions 121 is two, and the number of the positioning pins 122 is four. Two positioning pins 122 are protruding from one side of each abutting portion 121, and the two abutting portions 121 respectively position one first workpiece 200, and every two positioning pins 122 position one second workpiece 300.

[0033] A guide post 123 is protruded from the top surface of the base plate 12 . There are two guide posts 123 . The two guide posts 123 are spaced apart. The guide posts 123 are plugged into and matched with the pressing mechanism 40 to position the pressing mechanism 40 so that the pressing mechanism 40 is accurately positioned.

[0034] See also Figure 1 , Figure 3 and Figure 4 The base plate 12 is also provided with a plurality of spaced accommodation holes 124, each of which is provided with a rotating shaft 14. The base plate 12 is provided with a plurality of buckle plates 125, each of which is covered on a receiving hole 124 to cover a part of the receiving hole 124. Part of the structure of the resisting mechanism 20 is received in the receiving hole 124 and connected to the rotating shaft 14, and another part of the structure of the resisting mechanism 20 protrudes from the base plate 12.

[0035] See also Figure 1 , Figure 2 , Figure 4 and Figure 5The supporting mechanism 20 includes a supporting member 21 rotatably connected to the base 10 and an elastic member 22 provided between the base 10 and the supporting member 21. There are multiple supporting members 21, and the multiple supporting members 21 correspond one-to-one to the multiple accommodating holes 124. Part of the structure of the supporting member 21 is accommodated in the accommodating hole 124 and is rotatably connected to the rotating shaft 14. The end of the supporting member 21 extends out of the accommodating hole 124 and protrudes out of the substrate 12. In the present embodiment, two supporting members 21 are provided on the adjacent side of each abutting portion 121, and the two supporting members 21 respectively abut the side of the first workpiece 200 from the X-axis direction and the Y-axis direction. When the lifting mechanism 30 extends into the accommodating hole 124 and pushes the supporting member 21 away from the side of the elastic member 22, the supporting member 21 will rotate and move away from the abutting portion 121. Among them, Figure 5 The hole on the middle abutment 21 that cooperates with the rotating shaft 14 is not shown.

[0036] An arc chamfer 211 is provided on one side of the abutting member 21 away from the abutting portion 121. When the abutting member 21 rotates under the abutment of the lifting mechanism 30, the arc chamfer 211 plays a role of giving way to prevent the abutting member 21 from touching the buckle plate 125 during rotation, thereby avoiding interference.

[0037] The elastic member 22 may be a spring, and the number of the elastic members 22 is multiple, and the multiple elastic members 22 correspond to the multiple abutting members 21 one by one. The elastic member 22 is arranged in the receiving hole 124, and the elastic member 22 is sealed in the receiving hole 124 under the action of the buckle plate 125. The two ends of the elastic member 22 abut against the substrate 12 and the side of the corresponding abutting member 21 away from the abutting portion 121, respectively. The elastic member 22 drives the corresponding abutting member 21 to press the first workpiece 200 against the abutting portion 121, and the first workpiece 200 is tightly fixed on the substrate 12 under the action of the two abutting members 21. Because the abutting member 21 elastically abuts against the first workpiece 200 under the action of the elastic member 22, the first workpiece 200 is protected and prevented from being crushed.

[0038] See also Figure 2 , Figure 4 and Figure 6 The lifting mechanism 30 includes a lifting driving member 31 disposed on the side of the base 10 away from the abutting portion 121, and a lifting member 32 connected to the lifting driving member 31. The lifting member 32 is inserted into the base plate 12 of the base 10 and abuts against the side of the abutting member 21 away from the elastic member 22. The lifting driving member 31 can be a linear cylinder, and the lifting driving member 31 drives the lifting member 32 to rise and push the abutting member 21 to rotate so that the abutting member 21 is away from the abutting portion 121.

[0039] Specifically, the lifting member 32 includes a lifting seat 321 connected to the lifting driving member 31, a top block 322 connected to the lifting seat 321, and a guide block 323 connected to the lifting seat 321 and spaced apart from the top block 322. The lifting seat 321 is in the shape of a rectangular plate, the top block 322 can be in the shape of a long strip, and the top block 322 is arranged on the lifting seat 321 along the Z-axis direction. The number of the top blocks 322 is equal to the number of the abutting members 21 and corresponds one to one. Each top block 322 is inserted into the substrate 12 and abuts against the side of the abutting member 21 away from the elastic member 22, and each top block 322 pushes the corresponding abutting member 21 to rotate. The guide block 323 can be a columnar structure or a rectangular parallelepiped strip structure, and the guide block 323 is arranged on the lifting seat 321 along the Z-axis direction. For example, in the process of placing the first workpiece 200, the lifting drive 31 drives the lifting seat 321 to rise, and at this time, the guide block 323 is plugged into the base plate 12, and the guide block 323 guides the top block 322, so that the top block 322 is inserted into the receiving hole 124 and pushes the side of the abutting member 21 away from the elastic member 22, so that the abutting member 21 rotates and moves away from the abutting portion 121, so that the abutting member 21 makes way for the first workpiece 200. Then, the first workpiece 200 is placed on the base plate 12, and the lifting drive 31 drives the lifting seat 321 to descend, and the top block 322 moves away from the abutting member 21. The abutting member 21 is reset under the elastic action of the elastic member 22, so that the abutting member 21 abuts against the first workpiece 200 and presses the first workpiece 200 tightly against the abutting portion 121. In this way, the supporting member 21 automatically gives way under the action of the lifting mechanism 30 without manual operation, and then the supporting member 21 is reset to press the first workpiece 200 by moving the top block 322 of the lifting mechanism 30 away from the supporting member 21. Since the purpose of automatically clamping the first workpiece 200 is achieved under the coordinated action of the lifting mechanism 30 and the supporting mechanism 20, manual operation is not required, thereby reducing the labor intensity of the operator.

[0040] See also Figure 1 , Figure 2 , Figure 7 and Figure 8 The pressing mechanism 40 includes a pressing assembly 41 covering the abutting portion 121 and the positioning pin 122 and a locking assembly 42 provided on the base 10. When the pressing assembly 41 is covered on the base 10, the pressing assembly 41 presses the second workpiece 300 against the first workpiece 200, and the locking assembly 42 abuts against a side of the pressing assembly 41 away from the base 10 to lock the pressing assembly 41 to the base 10.

[0041] The pressing assembly 41 includes a cover plate 411 that abuts against the base 10 and covers the abutting portion 121 and the positioning pin 122, and a pressing module 412 that is elastically arranged on the side of the cover plate 411 facing the base 10. A groove 413 is provided on the cover plate 411, and the pressing module 412 is arranged at the bottom of the groove 413. When the cover plate 411 abuts against the substrate 12 of the base 10, the abutting portion 121, the positioning pin 122, the first workpiece 200 and the second workpiece 300 are accommodated in the groove 413, and the pressing module 412 presses the second workpiece 300 against the first workpiece 200. The groove 413 plays a role of avoiding to accommodate the abutting portion 121, the positioning pin 122, the first workpiece 200 and the second workpiece 300, so as to avoid the cover plate 411 from being unable to cover the substrate 12.

[0042] Specifically, the pressing module 412 includes a pressing member 414 slidably disposed on the cover plate 411 and a buffer member 415 disposed between the pressing member 414 and the cover plate 411. A sliding hole 416 communicating with the groove 413 is provided on the bottom of the groove 413, and the pressing member 414 is slidably connected in the sliding hole 416, and the end of the pressing member 414 protrudes from the bottom of the groove 413. It can be understood that a limiting portion 417 is provided on the pressing member 414, and when the pressing member 414 slides in the sliding hole 416, the limiting portion 417 abuts against the substrate 12 to prevent the pressing member 414 from sliding from the sliding hole 416 into the groove 413. Two mounting grooves 418 are provided on the pressing member 414, and a buffer member 415 is disposed in each mounting groove 418. The buffer member 415 can be a spring, and the two ends of the buffer member 415 abut against the pressing member 414 and the cover plate 411 respectively. When the cover plate 411 abuts against the substrate 12 , the buffer member 415 drives the pressing member 414 to elastically press the second workpiece 300 against the first workpiece 200 , thereby preventing the first workpiece 200 and the second workpiece 300 from offsetting each other.

[0043] See also Figure 1 and Figure 7 The locking assembly 42 includes a locking drive 421 disposed on the base 10 and a locking member 422 connected to the locking drive 421, and the locking member 422 is located on one side of the cover plate 411. In this embodiment, the locking assembly 42 is divided into two groups, and the two groups of locking assemblies 42 are arranged on the base plate 12 at intervals to press the two ends of the cover plate 411. The locking drive 421 can be an angle cylinder. When the cover plate 411 is covered on the base plate 12, the locking drive 421 drives the locking member 422 to rotate and descend so that the locking member 422 abuts against the side of the cover plate 411 away from the base plate 12, thereby pressing the cover plate 411 against the base plate 12 to achieve locking.

[0044] See also Figure 1 and Figure 2In the process of positioning the first workpiece 200 and the second workpiece 300 by the welding positioning fixture 100, the lifting mechanism 30 is first pushed against the holding mechanism 20 to make the holding mechanism 20 give way, so that the first workpiece 200 is placed on the base 10, and then the lifting mechanism 30 is away from the holding mechanism 20, so that the holding mechanism 20 is abutted against the first workpiece 200 to press the first workpiece 200 against the base 10, so as to avoid the first workpiece 200 from shifting on the base 10 and affecting the welding accuracy; the second workpiece 300 is overlapped on the first workpiece 200, and the base 10 positions the second workpiece 300 to avoid the second workpiece 300 from shifting relative to the first workpiece 200; finally, the pressing mechanism 40 is covered on the base 10, and the pressing mechanism 40 presses the second workpiece 300 against the first workpiece 200, so that when welding the first workpiece 200 and the second workpiece 300, the position between the first workpiece 200 and the second workpiece 300 will not shift, thereby ensuring the welding accuracy. After welding is completed, the pressing mechanism 40 is removed, and the lifting mechanism 30 is pushed against the holding mechanism 20 again to make the holding mechanism 20 away from the first workpiece 200 to release the first workpiece 200. When using the welding positioning fixture 100 to position the first workpiece 200 and the second workpiece 300, the operator only needs to place the first workpiece 200 and the second workpiece 300 on the base 10, and the first workpiece 200 is positioned under the cooperation of the lifting mechanism 30 and the holding mechanism 20, and the second workpiece 300 is further positioned under the pressure of the pressing mechanism 40. Since there is no need to manually position the first workpiece 200 and the second workpiece 300, not only the clamping and positioning efficiency of the workpiece is improved, but also the labor intensity of the operator is reduced. In addition, since the welding positioning fixture 100 automatically positions the first workpiece 200 and the second workpiece 300, no manual operation is required, thereby avoiding the deformation of the first workpiece 200 or the second workpiece 300 due to excessive manual operation, thereby reducing the probability of deformation and damage of the workpiece.

[0045] The working process of the welding positioning fixture 100 provided in the embodiment of the present application is roughly as follows:

[0046] The lifting drive 31 drives the lifting seat 321 to drive the top block 322 and the guide block 323 to rise. The guide block 323 is slidably inserted on the base plate 12 to guide the top block 322 so that the top block 322 is accurately inserted into the receiving hole 124, and the abutting member 21 is pushed. The abutting member 21 rotates under the pushing action of the top block 322 to make way. At this time, the first workpiece 200 is placed on the base plate 12. The lifting drive 31 drives the lifting seat 321 to drive the top block 322 and the guide block 323 to descend. The top block 322 is away from the abutting member 21. The abutting member 21 is reset under the elastic action of the elastic member 22 and presses the first workpiece 200 against the abutting portion 121. The second workpiece 300 is placed on the first workpiece 200, and the positioning pin 122 on the base plate 12 is inserted into the second workpiece 300 to position the second workpiece 300. Then, the cover plate 411 covers the base plate 12 , and the pressing member 414 elastically presses the second workpiece 300 against the first workpiece 200 under the action of the buffer member 415 , so as to prevent the first workpiece 200 and the second workpiece 300 from deviating during the welding process.

[0047] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application may be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and therefore it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A welding positioning jig for positioning a first workpiece and a second workpiece, characterized in that: include: A base, wherein the base has abutting portions and positioning pins arranged at intervals, the abutting portions positioning the first workpiece, the positioning pins positioning the second workpiece and making the second workpiece overlap the first workpiece; The abutting mechanism comprises an abutting member rotatably connected to the base and an elastic member provided on the base and located on a side of the abutting member away from the abutting portion, wherein two ends of the elastic member abut against the base and the abutting member respectively, and the elastic member drives the abutting member to approach the abutting portion to press the first workpiece against the abutting portion; The lifting mechanism is arranged on a side of the base away from the abutting portion and is spaced apart from the supporting mechanism. The lifting mechanism passes through the base and abuts against a side of the supporting member away from the elastic member. The lifting mechanism pushes the supporting member to rotate so that the supporting member is away from the abutting portion.

2. The welding positioning fixture according to claim 1, characterized in that: The lifting mechanism includes a lifting driving member arranged on the side of the base away from the abutting portion and a lifting member connected to the lifting driving member. The lifting member is inserted into the base and abuts against the side of the supporting member away from the elastic member. The lifting driving member drives the lifting member to push the supporting member to rotate.

3. The welding positioning fixture according to claim 2, characterized in that: The lifting member includes a lifting seat connected to the lifting driving member and a lifting block connected to the lifting seat. The lifting block is inserted into the base and abuts against a side of the supporting member away from the elastic member. The lifting driving member drives the lifting seat to drive the lifting block to push the supporting member to rotate in a direction away from the abutting portion.

4. The welding positioning fixture according to claim 3, characterized in that: The lifting member also includes a guide block connected to the lifting seat, the guide block is spaced apart from the lifting block, and the guide block is slidably inserted in the base, and the guide block guides the moving direction of the lifting block.

5. The welding positioning fixture according to claim 1, characterized in that: A side of the abutting piece facing away from the abutting portion is provided with an arc chamfer.

6. The welding positioning fixture according to claim 1, characterized in that: The welding positioning fixture also includes a pressing mechanism, which includes a pressing assembly covering the abutting portion and the positioning pin and a locking assembly provided on the base, the pressing assembly presses the second workpiece against the first workpiece, and the locking assembly abuts against a side of the pressing assembly away from the base to lock the pressing assembly to the base.

7. The welding positioning fixture according to claim 6, characterized in that: The pressing assembly includes a cover plate and a pressing module elastically arranged on the side of the cover plate facing the base, the cover plate abuts against the base and covers the abutting portion and the positioning pin, and the pressing module elastically presses the second workpiece against the first workpiece.

8. The welding positioning fixture according to claim 7, characterized in that: The pressing module includes a pressing member slidably arranged on the cover plate and a buffer member arranged between the pressing member and the cover plate, two ends of the buffer member respectively abut against the cover plate and the pressing member, and the buffer member drives the pressing member to elastically abut against the second workpiece.

9. The welding positioning fixture according to claim 7, characterized in that: The locking assembly includes a locking drive member arranged on the base and a locking member connected to the locking drive member, wherein the locking member is located on one side of the cover plate, and the locking drive member drives the locking member to rotate and press the side of the cover plate away from the base to press the cover plate tightly against the base.

10. The welding positioning fixture according to claim 1, characterized in that: The base includes a bottom plate, a base plate spaced apart from the bottom plate, and a plurality of pillars connecting the bottom plate and the base plate. The abutment portion and the positioning pin are both located on the side of the base plate away from the bottom plate. The abutment member is rotatably connected to the base plate. Both ends of the elastic member abut against the abutment member and the base plate respectively. The lifting mechanism is provided on the side of the bottom plate facing the base plate. The lifting mechanism passes through the base plate and abuts against the abutment member.

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