Positioning mechanism

Abstract

The utility model 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 utility model relates to the field of semiconductor parts processing especially relates to a positioning mechanism. BACKGROUND

[0002] The honeycomb-shaped semiconductor device is formed by welding a plurality of bent metal sheets together, and a plurality of regular hexagonal units can be surrounded between every two bent metal sheets. When welding the bent metal sheets together, the positioning mechanism is generally used to position the bent metal sheets, which facilitates the welding operation. The positioning mechanism in the prior art has a plurality of honeycomb compact grooves, and the adjacent two bent metal sheets are limited in a honeycomb compact groove, so that a plurality of bent metal sheets can be positioned at one time to facilitate the improvement of welding efficiency.

[0003] However, due to the inevitable small errors in the specifications and groove sizes of the bent metal sheets and the uneven welding between the bent metal sheets, it is difficult to take out the adjacent two bent metal sheets from the honeycomb compact groove after welding, so it is usually necessary to knock the welded bent metal sheets from the bottom of the positioning mechanism upward with a rubber hammer or other tools. However, this way of taking out the workpiece will deform the bent metal sheet, thereby affecting the overall quality of the honeycomb-shaped semiconductor device. Therefore, it is urgent to propose a positioning mechanism to solve the above problems. SUMMARY

[0004] One object of the utility model is to provide a positioning mechanism to solve the technical problems that the welded bent metal sheet is difficult to be taken out from the positioning mechanism and the workpiece is easy to deform in the prior art, and to achieve the technical effects of improving manufacturing efficiency and improving workpiece quality.

[0005] To achieve this object, the utility model adopts the following technical solutions:

[0006] The positioning mechanism is used for positioning the welding position of adjacent bent metal sheets, and the positioning mechanism comprises a fixed component and a movable component;

[0007] The fixed component comprises a main support and a first support block, and a plurality of first support blocks are arranged on one side of the main support along a first direction;

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

[0009] The first support block and the second support block are alternately arranged along the first direction, and the sliding bar is slidingly arranged on the main support along the first direction, so that the movable component can be slidingly switched between the clamping position and the release position;

[0010] The second supporting block has a first side and a second side opposite to the first side, when the movable assembly is in the releasing position, the first side of the second supporting block and the first supporting block adjacent to the first side abut to form a regular hexagonal stopper; when the movable assembly 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 welding part of the adjacent bent metal sheet.

[0011] Optionally, the positioning mechanism further comprises an elastic member and a limiting member, one end of the elastic member is fixed relative to the main support, and the other end can apply force to the sliding bar, so that the movable assembly always has a tendency to return to the releasing position, and the limiting member selectively limits the movable assembly in the clamping position.

[0012] Optionally, the fixed assembly further comprises an end cover, the end cover is detachably connected to the main support at both ends in 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 arranged on the end cover, the threaded hole extends in 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 sliding bar.

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

[0015] Optionally, part of the first supporting block is provided with a threaded fastening hole, the cover plate is provided with a fastening through hole, the fastening through hole corresponds to the threaded fastening hole one by one, and the cover plate and the first supporting block are connected through a fastener penetrating the fastening through hole and the threaded fastening hole.

[0016] And / or, the main support is provided with an end cover at both ends in the first direction, and the two ends of the cover plate are detachably connected with the end covers at both ends of the main support.

[0017] Optionally, the main support is provided with a sliding groove in the first direction, the sliding groove and the first supporting block are located on the same side of the main support, the sliding bar is slidingly arranged in the sliding groove, and the first supporting block is arranged on the upper side of the sliding groove.

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

[0019] Optionally, the first supporting block comprises a supporting part and a connecting part connected with the supporting part, the main support is provided with a plurality of accommodating grooves spaced apart along the first direction, the connecting part is detachably installed in the accommodating groove, and a side of the connecting part away from the main support is flush with a side of the main support provided with the first supporting block.

[0020] Optionally, the first supporting block and the second supporting block are flared U-shaped structures with openings opposite to each other, so that the first supporting block and the second supporting block form the hollow hexagonal stop block.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model discloses a positioning mechanism, including fixed assembly and movable assembly, and the movable assembly's slide strip can slide relative to the main support of fixed assembly, and through making a plurality of second supporting blocks on the slide strip and a plurality of first supporting blocks on the main support alternate arrangement, can make movable assembly slide switching at clamping position and release position, thereby making the welding position of adjacent bending sheet metal selectively be clamped by the second side of second supporting block and the first supporting block adjacent to the second side, and the welding after convenient clamping and taking out. That is, by the displacement of the slide strip of the movable assembly relative to the fixed assembly, the clamping and loosening of the workpiece are realized, not only the positioning efficiency of the workpiece is improved, but also the difficulty of taking out the workpiece is reduced. In addition, the hexagonal stop block surrounded by the first side of the second supporting block and the first supporting block adjacent to the first side can better adapt to the shape of the bending sheet metal, thereby improving the positioning effect of the bending sheet metal. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is another explosion drawing of the positioning mechanism provided by the utility model embodiment;

[0024] Figure 2 is the clamping position schematic view provided by the utility model embodiment;

[0025] Figure 3 is the release position schematic view provided by the utility model embodiment;

[0026] Figure 4 is another explosion drawing of the positioning mechanism provided by the utility model embodiment;

[0027] Figure 5 is the structure schematic view of the first supporting block of the positioning mechanism provided by the utility model embodiment;

[0028] In the drawing:

[0029] 1, fixed assembly; 11, main support; 12, first support block; 121, support part; 122, connecting part; 123, avoiding slot; 13, end cover; 14, sliding groove; 15, accommodating groove;

[0030] 2, movable assembly; 21, sliding bar; 22, second support block;

[0031] 3, elastic member;

[0032] 4, cover plate. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0037] The positioning mechanism provided by the embodiment can solve the technical problems that the bent metal sheet after welding is difficult to be taken out from the positioning mechanism and is easy to deform when taken out.

[0038] As shown in Figures 1-4 The positioning mechanism provided by the embodiment comprises a fixed assembly 1 and a movable assembly 2. The fixed assembly 1 comprises a main support 11 and a plurality of first supporting blocks 12. The first supporting blocks 12 are arranged at intervals along the length direction of the main support 11 (hereinafter, the length direction of the main support 11 is defined as the first direction) on one side of the main support 11. The movable assembly 2 comprises a slide bar 21 and a plurality of second supporting blocks 22. The second supporting blocks 22 are arranged at intervals along the first direction on one side of the slide bar 21. The first supporting blocks 12 and the second supporting blocks 22 are arranged alternately along the first direction. The slide bar 21 is slidably arranged on the main support 11 along the first direction, so that the movable assembly 2 can be switched between a clamping position and a releasing position.

[0039] It can be understood that a row of first supporting blocks 12 are arranged at intervals along the first direction on the main support 11, a row of second supporting 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 support 11. When the first supporting blocks 12 and the second supporting blocks 22 are arranged alternately, the first supporting blocks 12 and the second supporting blocks 22 can form a one-to-one corresponding relationship, and each set of first supporting blocks 12 and second supporting blocks 22 can form a movement towards or away from each other with the reciprocating sliding of the slide bar 21.

[0040] As shown in Figures 2-3 The second supporting block 22 has a first side and a second side opposite to the first side. When the movable assembly 2 is in the releasing position, the first side of the second supporting block 22 and the first supporting block 12 adjacent to the first side abut to form a regular hexagonal stop block. When the movable assembly 2 is in the clamping position, the second side of the second supporting block 22 and the first supporting block 12 adjacent to the second side clamp the to-be-welded part of the adjacent bent metal sheet.

[0041] It can be understood that, as the slide 21 slides on the main support 11, the second support block 22 on the slide 21 can move towards the first support block 12 on the adjacent main support 11, and 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 side of the second support block 22 are away from each other, leaving a certain distance between adjacent regular hexagonal stoppers for placing the welding part of the adjacent bent metal sheet; and as the slide 21 slides on the main support 11 in the opposite direction, the first side of the second support block 22 on the slide 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 towards each other until the welding part of the adjacent bent metal sheet is clamped.

[0042] Through the above setting, the welding part of the adjacent bent metal sheet is selectively clamped by the second side of the second support block 22 and the first support block 12 adjacent to the second side, facilitating welding after clamping and taking out after welding, that is, through displacement of the slide 21 of the movable assembly 2 relative to the fixed assembly 1, clamping and loosening of the workpiece are realized, the positioning efficiency of the workpiece is improved, and the difficulty of taking out the workpiece is reduced.

[0043] In addition, the bent metal sheet needs to be surrounded to form a regular hexagonal unit after welding to form the 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 abut to form a regular hexagonal stopper, so as 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 sliding groove 14 in the first direction, the sliding groove 14 and the first support block 12 are located on the same side of the main support 11, the slide 21 is slidingly arranged in the sliding groove 14, and the first support block 12 is arranged on the upper side of the sliding groove 14. The sliding groove 14 provides a mounting position for the slide 21, and the sliding groove 14 can improve the smoothness of the slide 21 sliding on the main support 11, and more easily switch the release position and the clamping position of the movable assembly 2; the first support block 12 is arranged on the upper side of the sliding groove 14, eliminating the interference between the sliding groove 14 and the mounting position of the first support block 12, and reducing the installation difficulty.

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

[0046] Optionally, the positioning mechanism further comprises an elastic member 3 and a limiting member. One end of the elastic member 3 is fixed relative to the main support 11, and the other end is capable of applying force to the slide bar 21, so that the movable assembly 2 always has a tendency to return to the released position. The limiting member selectively limits the movable assembly 2 in the clamped position. That is, one end of the elastic member 3 is fixed relative to the main support 11, and the other end abuts against the slide bar 21. By using 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. The limiting member can selectively clamp the second side of the second support block 22 and the second side of the first support block 12 adjacent to the to-be-welded part of the bent metal sheet, so as to ensure that the first support block 12 and the second support block 22 do not relatively displace during welding, thereby ensuring the welding quality.

[0047] Understandably, after the elastic member 3 is arranged, because the movable assembly 2 always has a tendency to return to the released position, the to-be-welded part of the adjacent bent metal sheet is more easily separated from the clamped position, and the difficulty in taking out will be reduced.

[0048] Optionally, the fixed assembly 1 further comprises end covers 13, which are detachably connected to the two ends of the main support 11 along the first direction. The elastic member 3 is arranged on one end cover 13, and the limiting member is arranged on the other end cover 13. The elastic member 3 is arranged on the end cover 13 at either end of the main support 11 along the first direction, and the slide bar 21 is arranged on the main support 11. Therefore, the elastic member 3 can apply force to the slide bar 21 from one end of the slide bar 21, thereby reducing the installation difficulty of the elastic member 3. The limiting member is arranged on the other end cover 13, so that the limiting member can resist the force applied by the elastic member 3 from the other end of the slide bar 21, thereby facilitating the movable assembly 2 to enter the clamped position.

[0049] Optionally, the end cover 13 is provided with a threaded hole extending along the first direction, and the limiting member comprises a bolt arranged in the threaded hole and abutting against the sliding strip 21 at one end. One end cover 13 is provided with the elastic member 3, and the other end cover 13 is provided with a threaded hole. When the bolt is screwed, the bolt can move in the threaded hole along the first direction, thereby pushing the sliding strip 21 to slide on the main support 11 along the first direction, and resisting the force applied by the elastic member 3 to the sliding strip 21, i.e. resisting the tendency of the movable assembly 2 to remain or return to the released position, so that the second side of the second supporting block 22 and the first supporting block 12 adjacent to the second side move towards each other to clamp the to-be-welded part of the adjacent bent metal sheet into the clamped position. In addition, when the bolt is screwed in the opposite direction, the bolt can move in the threaded hole along the first direction in the opposite direction. At this time, the sliding strip 21 slides in the first direction in the opposite direction under the action of the elastic member 3, and the to-be-welded part of the adjacent bent metal sheet is separated from the clamped position. Since the elastic member 3 makes the movable assembly 2 always have the tendency to remain or return to the released position, the to-be-welded part of the adjacent bent metal sheet is more easily separated from the clamped position, facilitating the taking out of the workpiece and improving the convenience of taking out the workpiece.

[0050] Optionally, the positioning mechanism further comprises a cover plate 4 abutting against the first supporting block 12 and the second supporting block 22 away from the main support 11, and the cover plate 4 and the fixed assembly 1 are detachably connected. The cover plate 4 abuts against the first supporting block 12 and the second supporting block 22 away from the main support 11, which improves the stability of the second supporting block 22 relative to the first supporting block 12 when moving. When the to-be-welded part of the adjacent bent metal sheet is not clamped by the second supporting block 22 and the first supporting block 12, the cover plate 4 can prevent the to-be-welded part of the adjacent bent metal sheet from separating from the positioning mechanism, achieving the purpose of limiting and pressing the workpiece.

[0051] Optionally, part of the first supporting block 12 is provided with a threaded fastening hole, the cover plate 4 is provided with a fastening through hole corresponding to the threaded fastening hole in one-to-one correspondence, and the cover plate 4 and the first supporting block 12 are connected by a fastener penetrating through the fastening through hole and the threaded fastening hole. By penetrating the fastening through hole on the cover plate 4 and screwing into the threaded fastening hole on the first supporting block 12, the abutting effect of the cover plate 4 can be improved, and the structural strength of the overall positioning mechanism can be improved.

[0052] Further, the two ends of the cover plate 4 are detachably connected with the two end covers 13, so that the cover plate 4 and the fixed assembly 1 have multiple connection positions along the first direction, ensuring the stability of the cover plate 4 and avoiding the local lifting of the cover plate 4 to lose the pressing effect on part of the first supporting block 12.

[0053] In other embodiments, the cover plate 4 may not be connected to part of the first support block 12. Instead, the two ends of the cover plate 4 may be detachably connected to the end caps 13 at both ends of the main bracket 11. As long as the cover plate 4 can abut against the side of the first support block 12 and the second support block 22 away from the main bracket 11, no further restrictions are imposed here.

[0054] Optionally, such as Figure 5 As shown, the first support block 12 includes a support portion 121 and a connecting portion 122 fixedly connected to the support portion 121. The main bracket 11 has a plurality of receiving slots 15 spaced apart along a first direction. The connecting portion 122 is detachably installed in the receiving slot 15, and the side of the connecting portion 122 away from the main bracket 11 is flush with the side of the main bracket 11 where the first support block 12 is located. The support portion 121 and the second support block 22 cooperate to clamp the welding parts of adjacent bent metal sheets. The side of the connecting portion 122 away from the main bracket 11 is flush with the side of the main bracket 11 where the first support block 12 is located, which enables the support portion 121 to be aligned with the second support block 22, improves the shape fit of the first support block 12 and the second support block 22, and thus improves the contact stability. At the same time, the connecting portion 122 is flush with the surface of the main bracket 11, which also avoids the presence of steps that could cause scratches to the bent metal sheets.

[0055] Specifically, the connecting part 122 has two legs. The receiving groove 15 of the main bracket 11, which is spaced apart along the first direction, is divided into two slots by the slide groove 14. The two legs are installed in the two slots of the receiving groove 15, and an avoidance groove 123 is formed between the two legs, so that the connecting part 122 straddles 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 stop 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 stop 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 in this embodiment is as follows:

[0058] Firstly, the to-be-welded parts of the adjacent bent metal sheets are placed between the regular hexagonal stoppers, then the bolt on the end cover 13 is screwed, the sliding bar 21 is pushed to slide in the sliding groove 14, the first side of the second supporting block 22 is separated from the first supporting block 12 adjacent to the first side, the second side of the second supporting block 22 is gradually close to the first supporting block 12 adjacent to the second side, and finally the to-be-welded parts of the adjacent bent metal sheets are clamped; then the cover plate 4 is connected with the fixed assembly 1 to limit the upward movement of the movable assembly 2 and the bent metal sheets; then the to-be-welded parts of the adjacent bent metal sheets are welded; after the welding is completed, the bolt on the end cover 13 is screwed in the opposite direction, the bolt moves in the first direction, under the action of the elastic member 3, the sliding bar 21 reversely slides in the sliding groove 14, the first side of the second supporting block 22 is gradually close to the first supporting block 12 adjacent to the first side, and finally abuts to form a regular hexagonal stopper, at this time, the adjacent bent metal sheets can be taken out to replace the welding position, and the above process is repeated.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A positioning mechanism for positioning the welding portions of adjacent bent metal sheets, characterized in that, The positioning mechanism includes a fixed component (1) and a movable component (2); The fixing component (1) includes a main support (11) and a first support block (12), and a plurality of the first support blocks (12) are spaced apart along a first direction on one side of the main support (11); The active component (2) includes a slider (21) and a second support block (22), and a plurality of second support blocks (22) are spaced apart on one side of the slider (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 bracket (11) along the first direction so that the movable component (2) can slide and switch between the clamping position and the 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 to form a regular hexagonal stop. 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 welding part of the adjacent bent metal sheet.

2. The positioning mechanism according to claim 1, characterized in that, The positioning mechanism further includes an elastic element (3) and a limiting element. One end of the elastic element (3) is fixed relative to the main support (11), and the other end can apply force to the slide bar (21) so that the movable component (2) always tends to remain or return to the release position. The limiting element selectively limits the movable component (2) to the clamping position.

3. The positioning mechanism according to claim 2, characterized in that, The fixing component (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 disposed on one of the end caps (13), and the limiting member is disposed on the other end cap (13).

4. The positioning mechanism according to claim 3, characterized in that, The end cap (13) is provided with a threaded hole that extends along the first direction. The limiting member includes a bolt that is disposed 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 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 bracket (11), and the cover plate (4) and the fixing component (1) are detachably connected.

6. The positioning mechanism according to claim 5, characterized in that, 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 one-to-one with the threaded fastening holes. The cover plate (4) and the first support block (12) are connected by fasteners that pass through the fastening through holes and the threaded fastening holes. And / or, the main support (11) has end caps (13) protruding from both ends along the first direction, and the two ends of the cover plate (4) are detachably connected to the end caps (13) at both ends of the main support (11).

7. The positioning mechanism according to claim 1, characterized in that, The main support (11) has a groove (14) along the first direction. The 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 disposed in the groove (14). The first support block (12) spans the upper side of the groove (14).

8. The positioning mechanism according to claim 7, characterized in that, The first support block (12) has a relief groove (123) on the side near the slide (14), and the relief groove (123) avoids the slide bar (21).

9. The positioning mechanism according to claim 1, characterized in that, The first support block (12) includes a support part (121) and a connecting part (122) connected to the support part (121). The main bracket (11) is provided with a plurality of receiving slots (15) spaced apart along the first direction. The connecting part (122) is detachably installed in the receiving slot (15). The side of the connecting part (122) away from the main bracket (11) is flush with the side of the main bracket (11) where the first support block (12) is provided. The support part (121) and the second support block (22) cooperate to clamp the welding parts of adjacent bent metal sheets.

10. The positioning mechanism according to any one of claims 1-9, characterized in that, 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 block formed by the first support block (12) and the second support block (22) is a hollow structure.

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