Positioning mechanism

Abstract

The invention relates to the field of semiconductor part processing, in particular to a positioning mechanism. The positioning mechanism comprises a fixed assembly and a movable assembly, a sliding strip of the movable assembly can slide relative to a main support of the fixed assembly, and a plurality of second supporting blocks on the sliding strip and a plurality of first supporting blocks on the main support are alternately arranged, so that the movable assembly can be slidably switched between a clamping position and a releasing position; therefore, the to-be-welded parts of the adjacent bent metal sheets are selectively clamped by the second sides of the second supporting blocks and the first supporting blocks adjacent to the second sides, and welding after clamping and taking out after welding are facilitated. The workpiece is clamped and loosened through displacement of the sliding strip of the movable assembly relative to the fixed assembly, the positioning efficiency of the workpiece is improved, and the taking-out difficulty of the workpiece is lowered.

Description

Technical Field

[0001] The invention relates to the field of semiconductor parts processing, and in particular to a positioning mechanism. Background Art

[0002] The honeycomb semiconductor device is formed by welding together multiple bent metal sheets in sequence, and multiple regular hexagonal units can be enclosed between every two bent metal sheets. When the bent metal sheets are welded together, the bent metal sheets are generally positioned by a positioning mechanism to facilitate the welding operation. The positioning mechanism in the prior art has multiple honeycomb compact grooves, and two adjacent bent metal sheets are confined in one honeycomb compact groove, which can position multiple bent metal sheets at a time to improve welding efficiency.

[0003] However, due to the inevitable slight errors in the specifications of the bent metal sheets and the size of the grooves, as well as the uneven welding between the bent metal sheets, it is difficult to remove the two adjacent bent metal sheets from the honeycomb compact groove after welding. Therefore, it is usually necessary to use tools such as rubber hammers to knock upwards from the bottom of the positioning mechanism to remove the welded bent metal sheets. However, this method of removing parts will cause the bent metal sheets to deform, thereby affecting the overall quality of the honeycomb semiconductor device. Therefore, it is urgent to propose a positioning mechanism to solve the above problems. Summary of the invention

[0004] One object of the present invention is to provide a positioning mechanism to solve the technical problems in the prior art that the bent metal sheet after welding is difficult to remove from the positioning mechanism and the removed piece is easily deformed, so as to achieve the technical effect of improving manufacturing efficiency and improving workpiece quality.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The positioning mechanism is used to position the positions to be welded of adjacent bent metal sheets, and the positioning mechanism includes a fixed component and a movable component;

[0007] The fixing assembly comprises a main support and a first support block, wherein a plurality of the first support blocks are arranged at intervals on one side of the main support along a first direction;

[0008] The movable component comprises a slide bar and a second support block, and a plurality of the second support blocks are arranged at intervals on one side of the slide bar along the first direction;

[0009] The first support blocks and the second support blocks are alternately arranged along the first direction, and the slide bar is slidably arranged on the main support along the first direction, so that the movable component can slide and switch between the clamping position and the releasing position;

[0010] The second supporting block has a first side and a second side opposite to the first side. When the movable component is in the releasing position, the first side of the second supporting block and the first supporting block adjacent to the first side abut against each other to form a regular hexagonal stopper. When the movable component is in the clamping position, the second side of the second supporting block and the first supporting block adjacent to the second side clamp the adjacent bent metal sheets at the parts to be welded.

[0011] Optionally, the positioning mechanism also includes an elastic member and a limiting member, one end of the elastic member is fixed relative to the main bracket, and the other end can apply force to the sliding bar so that the movable component always has a tendency to maintain or return to the release position, and the limiting member selectively limits the movable component to the clamping position.

[0012] Optionally, the fixing assembly further includes end covers, which are detachably connected to both ends of the main bracket along the first direction, the elastic member is arranged on one of the end covers, and the limiting member is arranged on the other end cover.

[0013] Optionally, a threaded hole is provided on the end cover, the threaded hole extends along the first direction, the limiting member includes a bolt, the bolt is provided in the threaded hole and one end of the bolt abuts against the slide bar.

[0014] Optionally, the positioning mechanism further includes a cover plate, the cover plate abuts against a side of the first supporting block and the second supporting block away from the main bracket, and the cover plate and the fixing assembly are detachably connected.

[0015] Optionally, part of the first support blocks are provided with threaded fastening holes, the cover plate is provided with fastening through holes, the fastening through holes correspond to the threaded fastening holes one by one, and the cover plate and the first support blocks are connected by fasteners penetrating the fastening through holes and the threaded fastening holes;

[0016] And / or, end caps are protrudingly provided at both ends of the main bracket along the first direction, and both ends of the cover plate are detachably connected to the end caps at both ends of the main bracket.

[0017] Optionally, the main bracket is provided with a slide groove along the first direction, the slide groove and the first support block are located on the same side of the main bracket, the slide bar is slidably arranged in the slide groove, and the first support block is straddled on the upper side of the slide groove.

[0018] Optionally, a side of the first supporting block close to the sliding groove is provided with an avoidance groove, and the avoidance groove avoids the sliding bar.

[0019] Optionally, the first supporting block includes a supporting portion and a connecting portion connected to the supporting portion, the main bracket is provided with a plurality of accommodating grooves spaced apart along the first direction, the connecting portion is detachably installed in the accommodating groove, and a side of the connecting portion away from the main bracket is flush with a side of the main bracket where the first supporting block is provided, and the supporting portion and the second supporting block cooperate to clamp the parts to be welded of adjacent bent metal sheets.

[0020] Optionally, the first supporting block and the second supporting block are expanded U-shaped structures with openings facing each other, so that the regular hexagonal stopper formed by the first supporting block and the second supporting block is a hollow structure.

[0021] Beneficial effects of the present invention:

[0022] A positioning mechanism proposed by the present invention includes a fixed component and a movable component, wherein the slide bar of the movable component can slide relative to the main bracket of the fixed component, and by alternately arranging a plurality of second support blocks on the slide bar and a plurality of first support blocks on the main bracket, the movable component can slide and switch between a clamping position and a release position, so that the welding parts of adjacent bent metal sheets are selectively clamped by the second side of the second support block and the first support block adjacent to the second side, so as to facilitate welding after clamping and removal after welding. That is, by displacing the slide bar of the movable component relative to the fixed component, the clamping and loosening of the workpiece is realized, which not only improves the positioning efficiency of the workpiece, but also reduces the difficulty of removing the workpiece. In addition, the regular hexagonal stopper enclosed by the first side of the second support block and the first support block adjacent to the first side after abutting can better adapt to the shape of the bent metal sheet, thereby improving the positioning effect of the bent metal sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded diagram of a positioning mechanism provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the clamping position provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of a release position provided by an embodiment of the present invention;

[0026] Figure 4 is another exploded view of a positioning mechanism provided by an embodiment of the present invention;

[0027] Figure 5 is a structural schematic diagram of a first supporting block of a positioning mechanism provided by an embodiment of the present invention;

[0028] In the figure:

[0029] 1. Fixing assembly; 11. Main bracket; 12. First supporting block; 121. Supporting part; 122. Connecting part; 123. Avoiding groove; 13. End cover; 14. Sliding groove; 15. Accommodating groove;

[0030] 2. movable component; 21. slide bar; 22. second supporting block;

[0031] 3. Elastic parts;

[0032] 4. Cover plate. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; 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 the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] The present embodiment provides a positioning mechanism for solving the technical problems in the prior art that a bent metal sheet after welding is difficult to be removed from the positioning mechanism and the removed piece is easily deformed.

[0038] like Figure 1-Figure 4 As shown, a positioning mechanism provided in this embodiment includes a fixed component 1 and a movable component 2; the fixed component 1 further includes a main bracket 11 and a first support block 12, and a plurality of first support blocks 12 are arranged at intervals on one side of the main bracket 11 along the length direction of the main bracket 11 (hereinafter the length direction of the main bracket 11 is defined as the first direction); the movable component 2 includes a slide bar 21 and a second support block 22, and a plurality of second support blocks 22 are arranged at intervals on one side of the slide bar 21 along the first direction; the first support blocks 12 and the second support blocks 22 are alternately arranged along the first direction, and the slide bar 21 is slidably arranged on the main bracket 11 along the first direction, so that the movable component 2 can slide and switch between the clamping position and the release position.

[0039] It can be understood that a row of first support blocks 12 are arranged at intervals along the first direction on the main bracket 11, a row of second support blocks 22 are arranged at intervals along the first direction on the slide bar 21, and the slide bar 21 is slidably arranged on the main bracket 11. Then, when the first support blocks 12 and the second support blocks 22 are alternately arranged, multiple first support blocks 12 and multiple second support blocks 22 can form multiple groups of one-to-one corresponding relationships, and as the slide bar 21 slides back and forth, each group of first support blocks 12 and second support blocks 22 can form movements toward or away from each other.

[0040] like Figure 2-3 As shown, the second support block 22 has a first side and a second side opposite to the first side. When the movable component 2 is in the release position, the first side of the second support block 22 and the first support block 12 adjacent to the first side abut to form a regular hexagonal stopper; when the movable component 2 is in the clamping position, the second side of the second support block 22 and the first support block 12 adjacent to the second side clamp the adjacent bent metal sheets at the parts to be welded.

[0041] It can be understood that as the slide bar 21 slides on the main bracket 11, the second support block 22 on the slide bar 21 can move toward the first support block 12 on the adjacent main bracket 11. After the first side of the second support block 22 abuts against the first support block 12 adjacent to the first side, a regular hexagonal stopper is formed. At this time, the first support block 12 and the second sides of the second support block 22 are away from each other, so that a certain distance is left between the adjacent regular hexagonal stoppers for placing the adjacent bent metal sheets to be welded. As the slide bar 21 slides in the opposite direction on the main bracket 11, the first side of the second support block 22 on the slide bar 21 moves away from the first support block 12 adjacent to the first side, the regular hexagonal stopper disintegrates, and the second side of the second support block 22 and the first support block 12 adjacent to the second side move toward each other until a clamping state is formed for the adjacent bent metal sheets to be welded.

[0042] Through the above arrangement, the parts to be welded of adjacent bent metal sheets are selectively clamped by the second side of the second support block 22 and the first support block 12 adjacent to the second side, which facilitates welding after clamping and removal after welding. That is, the sliding bar 21 of the movable component 2 is displaced relative to the fixed component 1 to achieve clamping and loosening of the workpiece, thereby improving the positioning efficiency of the workpiece and reducing the difficulty of removing the workpiece.

[0043] In addition, after the bent metal sheet is welded, it needs to be surrounded to form a regular hexagonal unit to form a final honeycomb structure product. Therefore, in order to adapt to the regular hexagonal unit, the first side of the second support block 22 and the first support block 12 adjacent to the first side are abutted to form a regular hexagonal stopper to better adapt to the shape of the bent metal sheet and improve the positioning effect of the bent metal sheet.

[0044] Optionally, the main support 11 is provided with a slide groove 14 along the first direction, the slide groove 14 and the first support block 12 are located on the same side of the main support 11, the slide bar 21 is slidably arranged in the slide groove 14, and the first support block 12 is arranged on the upper side of the slide groove 14. The slide groove 14 provides an installation position for the slide bar 21, and the slide groove 14 can improve the smoothness of the slide bar 21 sliding on the main support 11, and it is easier to switch the release position and the clamping position of the movable component 2; the first support block 12 is arranged on the upper side of the slide groove 14, eliminating the interference between the slide groove 14 and the first support block 12 at the installation position, and reducing the difficulty of installation.

[0045] Optionally, a side of the first support block 12 close to the slide slot 14 is provided with an avoidance groove 123, and the avoidance groove 123 avoids the slide bar 21. In order to avoid interference between the first support block 12 and the slide bar 21, a side of the first support block 12 close to the slide slot 14 is provided with an avoidance groove 123 for avoiding the slide bar 21, thereby improving the rationality of the structure.

[0046] Optionally, the positioning mechanism further includes an elastic member 3 and a limiting member, one end of the elastic member 3 is fixed relative to the main bracket 11, and the other end can apply force to the slide bar 21, so that the movable component 2 always has a tendency to maintain or restore to the release position, and the limiting member selectively limits the movable component 2 to the clamping position. That is, one end of the elastic member 3 is fixed relative to the main bracket 11, and the other end abuts the slide bar 21. By utilizing the elasticity of the elastic member 3 itself, the first side of the second support block 22 on the slide bar 21 always has a tendency to abut against the first support block 12 adjacent to the first side, and the limiting member can selectively make the second side of the second support block 22 clamp the second side of the first support block 12 to clamp the adjacent bent metal sheet to be welded, so as to ensure that the first support block 12 and the second support block 22 will not be relatively displaced during the welding process, thereby ensuring the welding quality.

[0047] It can be understood that after the elastic member 3 is provided, since the movable component 2 always has a tendency to maintain or restore the released position, the adjacent bent metal sheets to be welded are more likely to be separated from the clamping position, and the difficulty of removal will be reduced.

[0048] Optionally, the fixing assembly 1 further includes an end cap 13, which is detachably connected to both ends of the main bracket 11 along the first direction, the elastic member 3 is arranged on one end cap 13, and the stopper is arranged on the other end cap 13. The elastic member 3 is arranged on the end cap 13 at either end of the main bracket 11 along the first direction, and the slide bar 21 is arranged on the main bracket 11, so that the elastic member 3 can be conveniently applied to the slide bar 21 from one end thereof, thereby reducing the difficulty of installing the elastic member 3. The stopper is arranged on the other end cap 13, so that the stopper can resist the force of the elastic member 3 from the other end of the slide bar 21, thereby facilitating the movable assembly 2 to enter the clamping position.

[0049] Optionally, a threaded hole is provided on the end cover 13 , and the threaded hole extends along the first direction. The limiting member includes a bolt, and the bolt is provided in the threaded hole and one end of the bolt abuts against the slide bar 21 . An elastic member 3 is provided on one end cover 13, and a threaded hole is provided on the other end cover 13. Then, when the bolt is screwed, the bolt can move in the threaded hole along the first direction, thereby pushing the slide bar 21 to slide in the first direction on the main bracket 11, and then resisting the force applied by the elastic member 3 to the slide bar 21, that is, resisting the tendency of the movable component 2 to maintain or restore to the release position, so that the second side of the second support block 22 and the first support block 12 adjacent to the second side move toward each other, thereby clamping the adjacent bent metal sheets to be welded and entering the clamping position; in addition, when the bolt is screwed in the opposite direction, the bolt can move in the threaded hole in the first direction and move in the opposite direction. At this time, the slide bar 21 slides in the opposite direction along the first direction under the action of the elastic member 3, and the adjacent bent metal sheets to be welded are separated from the clamping position. Moreover, because the elastic member 3 makes the movable component 2 always have the tendency to maintain or restore to the release position, the adjacent bent metal sheets to be welded are more easily separated from the clamping position, which is convenient for removing the workpiece and improves the convenience of taking out.

[0050] Optionally, the positioning mechanism further includes a cover plate 4, which abuts against the side of the first support block 12 and the second support block 22 away from the main support 11, and the cover plate 4 and the fixing assembly 1 are detachably connected. The cover plate 4 abuts against the side of the first support block 12 and the second support block 22 away from the main support 11, thereby improving the stability of the second support block 22 when it moves relative to the first support block 12, and when the to-be-welded parts of the adjacent bent metal sheets are not clamped by the second support block 22 and the first support block 12, the cover plate 4 can prevent the to-be-welded parts of the adjacent bent metal sheets from escaping from the positioning mechanism, thereby achieving the purpose of limiting and pressing the workpiece.

[0051] Optionally, part of the first support block 12 is provided with threaded fastening holes, and the cover plate 4 is provided with fastening through holes, the fastening through holes correspond to the threaded fastening holes one by one, and the cover plate 4 and the first support block 12 are connected by fasteners penetrating the fastening through holes and the threaded fastening holes. The fasteners pass through the fastening through holes on the cover plate 4 and are screwed into the threaded fastening holes on the first support block 12, which can improve the abutment effect of the cover plate 4 and improve the structural strength of the overall positioning mechanism.

[0052] Furthermore, the two ends of the cover plate 4 are detachably connected to the two end covers 13 so that the cover plate 4 and the fixing assembly 1 have multiple connection positions along the first direction, ensuring the setting stability of the cover plate 4 and preventing the cover plate 4 from partially warping up and losing the pressing effect on part of the first support block 12.

[0053] In other embodiments, the cover plate 4 may not be connected to part of the first support block 12, and only the two ends of the cover plate 4 and the end caps 13 at the two ends of the main bracket 11 are set to be detachably connected. As long as it can be ensured that the cover plate 4 abuts against the first support block 12 and the second support block 22 on the side away from the main bracket 11, no excessive restrictions are made here.

[0054] Alternatively, if Figure 5 As shown, the first support block 12 includes a support portion 121 and a connection portion 122 fixedly connected to the support portion 121. The main bracket 11 is provided with a plurality of accommodating grooves 15 spaced apart along the first direction. The connection portion 122 can be detachably installed in the accommodating grooves 15, and the side of the connection portion 122 away from the main bracket 11 is flush with the side of the main bracket 11 provided with the first support block 12. The support portion 121 and the second support block 22 cooperate to clamp the adjacent bent metal sheets to be welded. The side of the connection portion 122 away from the main bracket 11 is flush with the side of the main bracket 11 provided with the first support block 12, which can align the support portion 121 with the second support block 22, improve the shape adaptability of the first support block 12 and the second support block 22, and thus improve the abutment stability; at the same time, the connection portion 122 is flush with the surface of the main bracket 11, which also avoids the appearance of steps and scratches on the bent metal sheets.

[0055] Specifically, the connecting portion 122 has two legs, and the accommodating groove 15 spaced apart along the first direction of the main bracket 11 is divided into two groove portions by the slide groove 14. The two legs are installed in the two groove portions of the accommodating groove 15, and an avoidance groove 123 is formed between the two legs, so that the connecting portion 122 is arranged across the slide groove 14 and avoids the slide bar 21.

[0056] Optionally, the first support block 12 and the second support block 22 are flared U-shaped structures with openings facing each other, so that the regular hexagonal stopper formed by the first support block 12 and the second support block 22 is a hollow structure. This arrangement can effectively reduce the overall weight of the positioning mechanism and improve portability. In other embodiments, the regular hexagonal stopper formed by the first support block 12 and the second support block 22 can also be a solid structure.

[0057] The working process of the positioning mechanism of this embodiment is as follows:

[0058] First, the parts to be welded of the adjacent bent metal sheets are placed between the regular hexagonal stoppers, and then the bolts on the end cover 13 are screwed to push the slide bar 21 to make it slide in the slide groove 14, the first side of the second support block 22 and the first support block 12 adjacent to the first side are separated, and the second side of the second support block 22 and the first support block 12 adjacent to the second side are gradually approached, and finally the parts to be welded of the adjacent bent metal sheets are clamped; then the cover plate 4 is connected to the fixed component 1 to limit the upward movement of the movable component 2 and the bent metal sheet; thereafter, the parts to be welded of the adjacent bent metal sheets are welded; after the welding is completed, the bolts on the end cover 13 are screwed in the opposite direction to move the bolts along the first direction, and under the action of the elastic member 3, the slide bar 21 slides in the opposite direction in the slide groove 14, the first side of the second support block 22 and the first support block 12 adjacent to the first side are gradually approached, and finally abut to form a regular hexagonal stopper, at which time the adjacent bent metal sheets can be taken out to change the welding position, and the above process is repeated.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A positioning mechanism for positioning adjacent bent metal sheets at locations to be welded, characterized in that: The positioning mechanism comprises a fixed component (1) and a movable component (2); The fixing assembly (1) comprises a main support (11) and a first support block (12), wherein a plurality of the first support blocks (12) are arranged at intervals on one side of the main support (11) along a first direction; The movable component (2) comprises a slide bar (21) and a second support block (22), wherein a plurality of the second support blocks (22) are arranged at intervals on one side of the slide bar (21) along the first direction; The first support block (12) and the second support block (22) are alternately arranged along the first direction, and the slide bar (21) is slidably arranged on the main support (11) along the first direction, so that the movable component (2) can slide and switch between a clamping position and a release position; The second support block (22) has a first side and a second side opposite to the first side. When the movable component (2) is in the release position, the first side of the second support block (22) and the first support block (12) adjacent to the first side abut against each other to form a regular hexagonal stopper. When the movable component (2) is in the clamping position, the second side of the second support block (22) and the first support block (12) adjacent to the second side clamp the adjacent bent metal sheets at the position to be welded.

2. The positioning mechanism according to claim 1, characterized in that: The positioning mechanism further comprises an elastic member (3) and a limiting member, wherein one end of the elastic member (3) is fixed relative to the main bracket (11), and the other end is capable of applying force to the slide bar (21) so that the movable component (2) always has a tendency to remain or return to the release position, and the limiting member selectively limits the movable component (2) to the clamping position.

3. The positioning mechanism according to claim 2, characterized in that: The fixing assembly (1) further comprises an end cover (13), wherein the end cover (13) is detachably connected to the two ends of the main bracket (11) along the first direction, the elastic member (3) is arranged on one of the end covers (13), and the limiting member is arranged on the other end cover (13).

4. The positioning mechanism according to claim 3, characterized in that: The end cover (13) is provided with a threaded hole, the threaded hole extending along the first direction, the limiting member comprises a bolt, the bolt is arranged in the threaded hole and one end of the bolt abuts against the slide bar (21).

5. The positioning mechanism according to claim 1, characterized in that: The positioning mechanism further comprises a cover plate (4), the cover plate (4) abutting against a side of the first supporting block (12) and the second supporting block (22) away from the main bracket (11), and the cover plate (4) and the fixing assembly (1) are detachably connected.

6. The positioning mechanism according to claim 5, characterized in that: Part of the first support block (12) is provided with a threaded fastening hole, the cover plate (4) is provided with a fastening through hole, the fastening through holes correspond to the threaded fastening holes one by one, and the cover plate (4) and the first support block (12) are connected by fasteners penetrating the fastening through holes and the threaded fastening holes; And / or, the main bracket (11) is provided with end covers (13) at both ends along the first direction, and the two ends of the cover plate (4) are detachably connected to the end covers (13) at both ends of the main bracket (11).

7. The positioning mechanism according to claim 1, characterized in that: The main support (11) is provided with a slide groove (14) along the first direction, the slide groove (14) and the first support block (12) are located on the same side of the main support (11), the slide bar (21) is slidably arranged in the slide groove (14), and the first support block (12) is arranged across the upper side of the slide groove (14).

8. The positioning mechanism according to claim 7, characterized in that: A side of the first supporting block (12) close to the sliding groove (14) is provided with an avoidance groove (123), and the avoidance groove (123) avoids the sliding bar (21).

9. The positioning mechanism according to claim 1, characterized in that: The first supporting block (12) comprises a supporting portion (121) and a connecting portion (122) connected to the supporting portion (121); the main support (11) is provided with a plurality of accommodating grooves (15) spaced apart along the first direction; the connecting portion (122) is detachably installed in the accommodating grooves (15); and a side of the connecting portion (122) away from the main support (11) is flush with a side of the main support (11) provided with the first supporting block (12); the supporting portion (121) and the second supporting block (22) cooperate to clamp adjacent bent metal sheets at locations to be welded.

10. The positioning mechanism according to any one of claims 1 to 9, characterized in that: The first supporting block (12) and the second supporting block (22) are expanded U-shaped structures with openings facing each other, so that the regular hexagonal stopper formed by the first supporting block (12) and the second supporting block (22) is a hollow structure.

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