A hook and sheet metal welding tool and welding structure

Abstract

This utility model discloses a welding fixture and welding structure for a hook and sheet metal, belonging to the field of automotive parts manufacturing. The welding fixture includes a sheet metal positioning support assembly, comprising a first support assembly located on the underside of the sheet metal to support its bottom surface, at least one first horizontal positioning assembly passing through a hole in the sheet metal, and a first clamping assembly located on the upper side of the sheet metal and applying a clamping force to its upper surface; the hook positioning support assembly includes a second support assembly located on the underside of the non-connection area of ​​the L-shaped hook and supporting its bottom surface, a second horizontal positioning assembly located at the end of the non-connection area of ​​the L-shaped hook and restricting its end position, and a second clamping assembly located on the upper side of the connection area and non-connection area of ​​the L-shaped hook and applying a clamping force to its upper surface. This utility model can effectively prevent displacement and deformation of the sheet metal and hook during the welding process, improving welding reliability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing, and in particular to a welding fixture for hooks and sheet metal. Background Technology

[0002] Currently, in vehicle design, exhaust pipes are typically mounted on hooks on the chassis floor. These hooks are L-shaped and connected to the chassis sheet metal using arc welding. Depending on the location of the exhaust pipe's lifting point, the sheet metal parts and their profiles connected to the hooks vary. Since the hooks are usually cylindrical and the sheet metal parts are typically curved, reliable positioning is crucial before welding. The positioning fixture directly impacts the reliability of the welding operation. Furthermore, because the hooks and sheet metal parts are in line contact, forming a triangular wedge-shaped gap, the welding wire and torch angle must be adjusted during arc welding to ensure the wire penetrates the contact point. This requires high precision; any deviation can lead to difficulty in arc initiation, resulting in multiple arc attempts and impacting operation time and equipment lifespan. Additionally, the weld seams are concentrated on both sides of the contact line, easily causing stress concentration and affecting fatigue strength. When connecting the hooks to curved sheet metal, in addition to the line contact issue, the hook shape must be changed from the traditional L-shape to a design that conforms to the sheet metal surface, increasing the difficulty of bending and manufacturing the hooks. Utility Model Content

[0003] Therefore, this utility model proposes a welding fixture and welding structure for a hook and sheet metal to improve the welding quality between the two.

[0004] To address the aforementioned technical problems, this utility model provides the following technical solution:

[0005] A welding fixture for a hook and sheet metal includes: a sheet metal positioning support assembly, including a first support assembly located on the lower side of the sheet metal to support its bottom surface, at least one first horizontal positioning assembly passing through a hole in the sheet metal, and a first clamping assembly located on the upper side of the sheet metal and applying a clamping force to its upper surface; and a hook positioning support assembly, including a second support assembly located on the lower side of the non-connection area of ​​the L-shaped hook and supporting its bottom surface, a second horizontal positioning assembly located at the end of the non-connection area of ​​the L-shaped hook and limiting its end position, and a second clamping assembly located on the upper side of the connection area and non-connection area of ​​the L-shaped hook and applying a clamping force to its upper surface.

[0006] In some embodiments of this utility model, the first support component includes a first support column, a first support plate mounted on the first support column, and at least one first support block mounted on the first support plate, wherein the top of the first support block supports the sheet metal bottom surface.

[0007] In some embodiments of this utility model, the first horizontal positioning component includes at least two positioning pins mounted on the first support plate, the positioning pins extending vertically and passing through the pre-set positioning holes in the sheet metal.

[0008] In some embodiments of this utility model, the first clamping assembly includes a first cylinder, the output end of the first cylinder is connected to a first transition connecting block, at least two first clamping blocks are detachably connected to the first transition connecting block, and the first clamping blocks abut against the upper surface of the sheet metal.

[0009] In some embodiments of this utility model, the second support component includes a second support column and a second support block mounted on the second support column. The upper surface of the second support block is provided with a positioning groove that matches the non-connection area of ​​the hook.

[0010] In some embodiments of this utility model, the second support block is mounted on the second support column via at least one transition member.

[0011] In some embodiments of this utility model, the second horizontal positioning component includes a horizontal positioning block mounted on a second support column, the horizontal positioning block abutting against the non-connection area end of the hook.

[0012] In some embodiments of this utility model, the horizontal positioning block is mounted on the second support column via at least one transition piece.

[0013] In some embodiments of this utility model, the second clamping assembly includes a second cylinder, the output end of the second cylinder is connected to a second transition connecting block, and at least two second clamping blocks are detachably connected to the second transition connecting block, with the two second clamping blocks respectively abutting against the two extension arms of the L-shaped hook.

[0014] This utility model also provides a welding structure for a hook and sheet metal. Using the above-mentioned welding fixture, the sheet metal is installed on a first support component and pressed by a first clamping component, the hook is installed on a second support component and pressed by a second clamping component, and the surface of the sheet metal to be welded is formed with an arc-shaped groove that matches the shape of the outer surface of the hook.

[0015] The technical solution of this utility model has the following technical advantages over the prior art:

[0016] In the welding fixture for hooks and sheet metal provided by this utility model, the sheet metal positioning support component accurately positions and fixes the sheet metal from three aspects: bottom support, horizontal positioning, and upper surface pressing. The hook positioning support component, based on the structural characteristics of the hook, ensures the positioning accuracy and stability of the hook from aspects such as non-connection area support, end horizontal positioning, and upper surface pressing. This effectively prevents problems such as displacement and deformation of the sheet metal and hook during the welding process, and greatly improves the reliability of the welding between the two.

[0017] In the welding structure between the hook and sheet metal provided by this utility model, an arc-shaped groove adapted to the hook is formed on the sheet metal. This not only ensures the proximity of the welding wire to the part being welded, facilitating welding operations and improving welding efficiency, but also ensures the ease of manufacturing the hook and reduces the manufacturing cost of the product. Attached Figure Description

[0018] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of this utility model, wherein:

[0019] Figure 1 This is a schematic diagram illustrating a specific embodiment of the welding fixture for the hook and sheet metal of this utility model;

[0020] Figure 2 This is a structural schematic diagram of a specific embodiment of the sheet metal positioning and support component of this utility model;

[0021] Figure 3 This is a schematic diagram of a specific embodiment of the hook positioning support component of this utility model;

[0022] Figure 4 This is another schematic diagram of a specific embodiment of the hook positioning support component of this utility model;

[0023] Figure 5 This is a schematic diagram of the welding structure between the hook and sheet metal of this utility model. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] The following is a welding fixture for a hook and sheet metal provided by this utility model, and a welding structure using the fixture. The specific embodiments are described in detail below with reference to the accompanying drawings.

[0029] Figures 1-4 The diagram shows a specific embodiment of the welding fixture for the hook and sheet metal of this utility model. The welding fixture includes a sheet metal positioning support assembly 10 for supporting and positioning sheet metal a and a hook positioning support assembly 20 for supporting and positioning hook b. In this embodiment, as... Figure 5 As shown, sheet metal a is formed into a curved surface sheet metal with an approximately U-shaped cross-section, while hook b is formed into an L-shaped hook with an approximately circular cross-section. The L-shaped hook b is formed by bending two extension arms of different lengths. The welding fixture is used to weld the bent area of ​​the L-shaped hook b and the shorter extension arm to the bottom outer area of ​​the sheet metal a. For ease of description, the area of ​​the hook b that contacts and connects with the sheet metal a is called the connection area b1 of the hook b, and the area of ​​the hook b that does not contact the sheet metal a is called the non-connection area b2 of the hook b.

[0030] like Figure 1 , Figure 2As shown, the sheet metal positioning support assembly 10 includes a first support assembly 11, a first horizontal positioning assembly 12, and a first clamping assembly 13. The first support assembly 11 supports the bottom surface of the sheet metal a from below; the first horizontal positioning assembly 12 engages with a through hole on the sheet metal a to restrict its horizontal position; and the first clamping assembly 13 applies a clamping force to the upper surface of the sheet metal a, cooperating with the first support assembly 11 to restrict its vertical position. Figure 3 , Figure 4 As shown, the hook positioning support assembly 20 includes a second support assembly 21, a second horizontal positioning assembly 22, and a second clamping assembly 23. The second support assembly 21 is located below the non-connection area b2 of the L-shaped hook b and supports its bottom surface. The second horizontal positioning assembly 22 is located at the end of the non-connection area b2 of the L-shaped hook b and restricts the horizontal position of its end. The second clamping assembly 23 is located above the connection area and non-connection area b2 of the L-shaped hook b and applies clamping force to its upper surface, cooperating with the first support assembly 11 to restrict the vertical position of the hook b.

[0031] In the aforementioned welding fixture, the sheet metal positioning support assembly 10 precisely positions and fixes the sheet metal a from three aspects: bottom support, horizontal positioning, and upper surface clamping. The hook positioning support assembly 20, based on the structural characteristics of the hook b, ensures the positioning accuracy and stability of the hook b from aspects such as support of the non-connection area b2, horizontal positioning of the end, and upper surface clamping. This effectively prevents problems such as displacement and deformation of the sheet metal a and the hook b during the welding process, and greatly improves the reliability of the welding between the two.

[0032] Specifically, in one alternative implementation, such as Figure 2 As shown, the first support assembly 11 includes a first support column 111 vertically mounted on the base 100 of the welding fixture, providing a stable foundation for the entire support structure. A first support plate 112 is horizontally fixed to the top of the first support column 111, and its area is larger than the cross-sectional area of ​​the first support column 111. It is used to support the first support block 113 and distribute the pressure of the sheet metal a. At least one first support block 113 is mounted on the first support plate 112, and the top of the first support block 113 contacts the bottom surface of the sheet metal a, providing a stable support point for the sheet metal a. For example, three first support blocks 113 can be set in a triangular distribution, which can provide stable support for the sheet metal a in the horizontal direction and effectively prevent the sheet metal a from deforming due to uneven stress during the welding process.

[0033] Specifically, in one optional embodiment, the first horizontal positioning component 12 includes at least two positioning pins 121 mounted on the first support plate 112. The positioning pins 121 extend vertically and are adapted to pre-set positioning holes on the sheet metal a. During actual assembly, the positioning holes on the sheet metal a are aligned with the positioning pins 121 and lowered. The positioning pins 121 pass through the positioning holes, thereby achieving precise horizontal positioning of the sheet metal a, restricting its degree of freedom of movement in the horizontal direction, ensuring the positional accuracy of the sheet metal a during welding, and ensuring that the position of the sheet metal a remains consistent during each welding operation, thus improving the consistency and reliability of the welding process.

[0034] Specifically, in one alternative implementation, such as Figure 2 As shown, the first clamping assembly 13 includes a first cylinder 131, a first transition connecting block 132, and a first clamping block 133. The first cylinder 131 is fixedly mounted on the base 100 of the welding fixture or on a cylinder support column 134 located on the base 100, and its output end is connected to the first transition connecting block 132. At least two first clamping blocks 133 are detachably connected to the first transition connecting block 132, and the first clamping blocks 133 are fixed to the first transition connecting block 132 by bolts or other fastening fasteners. When the first cylinder 131 works, it pushes the first transition connecting block 132 downward, thereby causing the first clamping blocks 133 to abut against the upper surface of the sheet metal a, pressing the sheet metal a tightly against the first support assembly 11, preventing the sheet metal a from shifting due to vibration or other factors during the welding process, further improving the stability of the sheet metal a's positioning, and providing a reliable guarantee for welding quality. More specifically, the first cylinder 131 adopts the integrated clamping cylinder series manufactured by Derong Intelligent Company, which can achieve mechanical self-locking and maintain the clamping state when the air circuit is accidentally disconnected, which is safe and reliable. At the same time, it has pressure sensing output to achieve controllable clamping force and avoid deformation of sheet metal a.

[0035] Specifically, in one optional embodiment, the first clamping block 133 and the first support block 113 are arranged vertically opposite each other, so that the clamping force of the first clamping block 133 acts on the area of ​​the sheet metal a with bottom support, avoiding excessive clamping force that causes deformation of the sheet metal a, and improving the working reliability of the welding fixture.

[0036] Specifically, in one alternative implementation, such as Figure 3 , Figure 4As shown, the second support assembly 21 includes a second support column 211 vertically mounted on the base 100 of the welding fixture, and a second support block 212 mounted on the second support column 211. The upper surface of the second support block 212 is provided with a positioning groove that matches the non-connection area b2 of the hook b. When the L-shaped hook b is placed on the second support block 212, the non-connection area b2 of the hook b is embedded in the positioning groove, achieving vertical positioning of the hook b. Simultaneously, the tight fit between the positioning groove and the non-connection area b2 of the hook b also restricts some degrees of freedom of movement of the hook b in the horizontal direction, allowing the hook b to maintain a stable position during welding. More specifically, the second support block 212 is mounted on the second support column 211 via at least one transition piece 213. The transition piece 213 can be a pad or similar structure, for example, such as... Figure 3 As shown, the transition piece 213 includes two L-shaped transition plates. By adjusting the thickness and direction of the transition piece 213, it can accommodate hooks b of different sizes, while avoiding interference with the sheet metal positioning support assembly 10, thus improving the versatility of the welding fixture.

[0037] like Figure 4 As shown, the second horizontal positioning component 22 includes a horizontal positioning block 221 mounted on the second support column 211, which abuts against the non-connection area b2 end of the hook b. In practical applications, by adjusting the position of the horizontal positioning block 221 on the second support column 211 so that it accurately abuts against the end of the non-connection area b2 of the hook b, the horizontal movement freedom of the hook b is further restricted, ensuring the accuracy of the hook b's position during welding and guaranteeing the relative positional accuracy between the hook b and the sheet metal a, which is beneficial to improving welding quality. The horizontal positioning block 221 is also mounted on the second support column 211 via at least one transition piece 222, facilitating flexible adjustment according to different sizes of the hook b.

[0038] Specifically, in one optional embodiment, the second clamping assembly 23 includes a second cylinder 231, a second transition connecting block 232, and second clamping blocks 233. The second cylinder 231 is fixedly mounted on the base 100 of the welding fixture or mounted on the second support column 211, and its output end is connected to the second transition connecting block 232. At least two second clamping blocks 233 are detachably connected to the second transition connecting block 232. The two second clamping blocks 233 correspond to the two extension arms of the L-shaped hook b, respectively. When the second cylinder 231 is working, it pushes the second transition connecting block 232 downward, so that the two second clamping blocks 233 respectively abut against the upper surfaces of the two extension arms of the L-shaped hook b, firmly fixing the hook b in the welding position, preventing the hook b from shifting or shaking during the welding process, and ensuring the stability and reliability of the welding between the hook b and the sheet metal a. The lower surface of the second clamping block 233 is also formed with a positioning groove. The tight fit between the positioning groove and the upper surface of the two extension arms further restricts the degree of freedom of movement of the L-shaped hook b in the horizontal direction, so that the L-shaped hook b can maintain a stable position during the welding process. Similarly, the second cylinder 231 adopts the integrated clamping cylinder series manufactured by Derong Intelligent Technology Co., Ltd., which can achieve mechanical self-locking and maintain the clamping state when the air circuit is accidentally disconnected, which is safe and reliable. At the same time, it has pressure sensing output to achieve controllable clamping force.

[0039] This utility model also provides a specific embodiment of the welding structure between hook b and sheet metal a, wherein hook b and sheet metal a are welded using the aforementioned welding fixture. For example... Figure 5 As shown, an arc-shaped groove a1 matching the shape of the outer surface of the hook b is formed on the surface of sheet metal a to be welded. Before welding, sheet metal a is positioned and fixed by sheet metal positioning support assembly 10, and then the L-shaped hook b is positioned and fixed by hook positioning support assembly 20. Because the arc-shaped groove a1 on sheet metal a matches the shape of the outer surface of hook b, when hook b is placed on sheet metal a, hook b can accurately embed into the arc-shaped groove a1, forming a good fit between the two, ensuring the assembly accuracy between hook b and sheet metal a. During the welding process, the welding wire can smoothly enter the welding area, ensuring the proximity of the welding wire to the parts being welded (i.e., hook b and sheet metal a), making the welding operation more convenient and improving welding efficiency and quality. At the same time, the design of the arc-shaped groove a1 ensures the manufacturability of hook b and reduces production costs.

[0040] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A welding fixture for a hook and sheet metal, characterized in that, include: The sheet metal positioning support assembly includes a first support assembly located on the lower side of the sheet metal to support its bottom surface, at least one first horizontal positioning assembly passing through a hole in the sheet metal, and a first clamping assembly located on the upper side of the sheet metal to apply a clamping force to its upper surface. The hook positioning support assembly includes a second support assembly located below the non-connection area of ​​the L-shaped hook and supporting its bottom surface, a second horizontal positioning assembly located at the end of the non-connection area of ​​the L-shaped hook and limiting its end position, and a second clamping assembly located above the connection area and non-connection area of ​​the L-shaped hook and applying a clamping force to its upper surface.

2. The welding fixture for a hook and sheet metal according to claim 1, characterized in that, The first support component includes a first support column, a first support plate mounted on the first support column, and at least one first support block mounted on the first support plate, wherein the top of the first support block supports the sheet metal bottom surface.

3. The welding fixture for a hook and sheet metal according to claim 2, characterized in that, The first horizontal positioning component includes at least two positioning pins mounted on the first support plate, the positioning pins extending vertically and passing through the pre-set positioning holes in the sheet metal.

4. The welding fixture for a hook and sheet metal according to claim 3, characterized in that, The first clamping assembly includes a first cylinder, the output end of the first cylinder is connected to a first transition connecting block, at least two first clamping blocks are detachably connected to the first transition connecting block, and the first clamping blocks abut against the upper surface of the sheet metal.

5. The welding fixture for a hook and sheet metal according to claim 1, characterized in that, The second support component includes a second support column and a second support block mounted on the second support column. The upper surface of the second support block is provided with a positioning groove that matches the non-connection area of ​​the hook.

6. The welding fixture for a hook and sheet metal according to claim 5, characterized in that, The second support block is mounted on the second support column via at least one transition piece.

7. The welding fixture for a hook and sheet metal according to claim 5, characterized in that, The second horizontal positioning component includes a horizontal positioning block mounted on a second support column, the horizontal positioning block abutting against the non-connection area end of the hook.

8. The welding fixture for a hook and sheet metal according to claim 7, characterized in that, The horizontal positioning block is mounted on the second support column via at least one transition piece.

9. The welding fixture for a hook and sheet metal according to claim 1, characterized in that, The second clamping assembly includes a second cylinder, the output end of which is connected to a second transition connecting block. At least two second clamping blocks are detachably connected to the second transition connecting block, and the two second clamping blocks abut against the two extension arms of the L-shaped hook, respectively.

10. A welding structure between a hook and sheet metal, characterized in that, Using any of the welding fixtures described in claims 1-9, sheet metal is mounted on a first support assembly and pressed by a first clamping assembly, and hook is mounted on a second support assembly and pressed by a second clamping assembly. The surface of the sheet metal to be welded is formed with an arc-shaped groove that matches the shape of the outer surface of the hook.

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