Sheet buckling type auxiliary frame welding reversible deformation tool

Abstract

The utility model discloses a thin plate buckling type auxiliary frame welding anti-deformation tool which comprises positioning pins arranged on mounting holes in the two sides of a lower thin plate and anti-deformation mechanisms symmetrically arranged at the inner arc face welding position between an upper thin plate and the lower thin plate. The reversible deformation mechanism comprises a first hinge mounting seat, a second hinge mounting seat, a multi-head hinge structure, a hinge control cylinder, a sliding table and a sliding block, the sliding table can be horizontally and slidably mounted on the sliding block, the hinge control cylinder is arranged between the sliding table and the first hinge mounting seat, and the fixed end of the hinge control cylinder is hinged to the second hinge mounting seat; the output end of the hinge control air cylinder is hinged to the first hinge installation base and the rear end of the sliding table through a multi-head hinge structure. The sliding table is provided with at least two L-shaped blocks, and the front ends of the L-shaped blocks are provided with circular pressing heads used for abutting against the flanging position of the inner arc face of the lower thin plate. The device is simpler in structure, effectively solves the problem of welding deformation of the thin plate, and improves the welding quality and efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile part tooling, in particular to a welding anti-deformation tooling for a thin-plate buckling type subframe. Background Art

[0002] For the butt welding of two thin-plate components with a long weld seam, the welding deformation amount in the Y direction is relatively large. To control the welding deformation amount, currently, two hinge control cylinders 4 act on the sliding table 2, and two positioning cylinders 5 act on the positioning pins 1. A total of four cylinders are used as the anti-deformation power, and together with the hinge mechanism 6 in the Z direction as the support, the welding anti-deformation function is realized together, as Figure 1 shown.

[0003] The problems existing in the above prior art solutions are as follows:

[0004] 1. The number of cylinders used is large, and the sliding table and hinge structures are complex, resulting in a high cost of the tooling;

[0005] 2. The structure occupies a large space in the Z direction, the ground clearance of the tooling is high, and the ergonomics is poor;

[0006] 3. The hinge structure is installed on the back of the tooling in a sunken manner, which is not easy to observe, inconvenient to repair, and affects the welding space;

[0007] 4. The anti-deformation direction of the tooling is single, and there is only a transverse anti-deformation effect.

[0008] The information disclosed in the above background art section is only for increasing the understanding of the overall background of the present utility model, and should not be regarded as an admission or an indication in any form that this information constitutes the prior art already known to those of ordinary skill in the art. Content of the Utility Model

[0009] Aiming at the above-mentioned existing defects, the purpose of the present utility model is to provide a welding anti-deformation tooling for a thin-plate buckling type subframe, with a simpler structure, which can effectively solve the problem of thin-plate welding deformation and improve the welding quality and efficiency.

[0010] The technical solution of the present utility model is as follows:

[0011] A welding reverse deformation tooling for a thin - plate snap - on subframe, which includes an upper thin plate and a lower thin plate that are snap - welded to each other. The tooling includes positioning pins arranged on the mounting holes on both sides of the lower thin plate, and a reverse deformation mechanism symmetrically arranged at the inner - arc surface welding joint between the upper thin plate and the lower thin plate. The reverse deformation mechanism includes a first hinge mounting seat, a second hinge mounting seat, a multi - head hinge structure, a hinge control cylinder, a slide table, and a slider. The slide table is slidably mounted on the slider horizontally. The hinge control cylinder is arranged between the slide table and the first hinge mounting seat. The fixed end of the hinge control cylinder is hinged to the second hinge mounting seat, and the output end of the hinge control cylinder is respectively hinged to the first hinge mounting seat and the rear end of the slide table through the multi - head hinge structure. At least two L - shaped blocks are arranged on the slide table, and circular pressing heads for abutting against the flanging of the inner arc surface of the lower thin plate are arranged at the front ends of the L - shaped blocks.

[0012] Specifically, the multi - head hinge structure includes a first articulated arm and a second articulated arm. The output end of the hinge control cylinder is jointly hinged to one ends of the first articulated arm and the second articulated arm. The other end of the first articulated arm is hinged to the first hinge mounting seat, and the other end of the second articulated arm is hinged to the rear end of the slide table.

[0013] Specifically, a limit seat is relatively arranged at the front end of the slide table, and a limit block for limiting the sliding distance of the slide table is installed on the limit seat.

[0014] Specifically, the included angle between at least two L - shaped blocks is set in a gradually increasing form towards the front of the slide table.

[0015] Specifically, the number of sliders is two, which are symmetrically arranged at the bottom of both sides of the slide table.

[0016] Specifically, a support seat is also arranged at the bottom of the second articulated arm. At least part of the top end of the support seat is set as a rail surface, and the bottom surface of the second articulated arm is slidably mounted on the support seat through a groove surface matching the rail surface.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. The reverse deformation mechanism of the present utility model only uses two cylinders, and the hinge and slide - table structures are simple and refined, reducing the manufacturing cost.

[0019] 2. The new reverse deformation mechanism of the present utility model saves installation space, reduces the height of the tooling platform, makes it easier for employees to clamp, and reduces the labor intensity of employees.

[0020] 3. The present utility model is installed on the front of the tooling, making disassembly, installation, and maintenance more convenient and reducing the maintenance time.

[0021] 4. The present utility model simultaneously increases the reverse deformation effects in both X and Y directions, making the reverse deformation effect better and the dimensions easier to control. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of a thin - plate snap - fit welding anti - deformation tooling in the prior art.

[0023] Figure 2 It is a schematic diagram of the structure of a thin - plate snap - fit sub - frame welding anti - deformation tooling of the present utility model.

[0024] Figure 3 It is a schematic diagram of the multi - head hinge structure of the present utility model.

[0025] In the figure, 1 - positioning pin, 2 - slide table, 3 - first hinge mounting seat, 4 - hinge control cylinder, 5 - positioning cylinder, 6 - hinge mechanism, 7 - upper thin plate, 8 - lower thin plate, 9 - second hinge mounting seat, 10 - slider, 11 - limit seat, 12 - limit block, 13 - L - shaped block, 14 - circular pressing head, 15 - first articulated arm, 16 - second articulated arm, 17 - support seat. Detailed Embodiment

[0026] To describe in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with embodiments and with reference to the drawings. In the description of the embodiments, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present embodiments and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0027] A thin - plate snap - fit sub - frame welding anti - deformation tooling according to the specific embodiment of the present solution is used for the weld positioning and anti - deformation of a sub - frame formed by the combination of two thin plates. As Figure 2 shown, the tooling mainly includes a positioning pin 1 arranged on the mounting holes on both sides of the lower thin plate 8, and an anti - deformation mechanism symmetrically arranged at the inner - arc welding joint between the upper thin plate 7 and the lower thin plate 8.

[0028] Refer to Figure 2 、 3The shown reverse deformation mechanism includes a first hinge mounting base 3, a second hinge mounting base 9, a multi-head hinge structure, a hinge control cylinder 4, a slide table 2, and a slider 10. Among them, the slider 2, the first hinge mounting base 3, and the second hinge mounting base 9 are all fixedly installed on the tooling table. The slide table 2 is slidably installed on the slider 10 horizontally. The hinge control cylinder 4 is arranged between the slide table 2 and the first hinge mounting base 3. The fixed end of the hinge control cylinder 4 is hinged to the second hinge mounting base 9. The output end of the hinge control cylinder 4 is respectively hinged to the first hinge mounting base 3 and the rear end of the slide table 2 through the multi-head hinge structure. Three L-shaped blocks 13 are arranged on the slide table 2. The front end of the L-shaped block 13 is provided with a circular pressing head 14 for abutting against the flanging at the inner arc surface of the lower thin plate 8.

[0029] When the tooling of this embodiment is in use, first, the mounting holes on both sides of the lower thin plate 8 are positioned through the positioning pins 1, and then the lower thin plate 8 is installed on the upper thin plate 7. Then, the hinge control cylinder 4 is started. The output end drives the slide table 2 to move forward through the multi-head hinge structure. The three circular pressing heads 14 press on the flanging at the inner arc surface of the lower thin plate 8. Then, the gap between the upper thin plate 7 and the lower thin plate 8 is welded. Due to the principle that the inner arc surface contracts in an arc shape inward after welding, a certain Y-direction force is applied to the workpiece through the circular pressing head 14. At the same time, the positioning pins 1 limit the deformation in the X-axis to a certain extent, so that the reverse deformation mechanism increases the reverse deformation effects in both the X and Y directions simultaneously and forms an external arc-shaped reverse moment, canceling the stress of the inward contraction generated by the welding thermal deformation, ensuring the dimensional accuracy of the welded parts, and improving the welding quality. In this embodiment, only two cylinders are used. The hinge and slide table structures are streamlined. The cost of a single unit is saved by 50%. The self-weight of the tooling can be reduced by 12 kg, and the manufacturing cost is reduced. Since the z-axis hinge structure in the prior art is cancelled, the height of the tooling platform is reduced by 360 mm, and the tooling is installed on the front of the welding position, making it easier for the operator to clamp and reducing the labor intensity of the operator. In summary, the purpose of this embodiment is achieved.

[0030] As a preferred technical solution of this embodiment, as Figure 3 shown, the multi-head hinge structure includes a first articulated arm 15 and a second articulated arm 16. The output end of the hinge control cylinder 4 is jointly hinged to one end of the first articulated arm 15 and the second articulated arm 16. The other end of the first articulated arm 15 is hinged to the first hinge mounting base 3. The other end of the second articulated arm 16 is hinged to the rear end of the slide table 2. The hinge control cylinder 4 is arranged in the middle. Through the multi-head hinge structure, the degree of freedom of movement in the spatial range is higher, so the structure can be made more compact.

[0031] In this embodiment, in order to precisely adjust the acting force of the circular pressing head 14, a limit seat 11 is relatively arranged at the front end of the sliding table 2. A limit block 12 for limiting the sliding distance of the sliding table 2 is installed on the limit seat 11. By changing the thickness of the limit block 12, the sliding distance of the sliding table 2 can be adjusted, so that the acting force of the circular pressing head 14 on the lower thin plate 8 can be adjusted.

[0032] As a preferred technical solution of this embodiment, the included angles between the three L-shaped blocks 13 are arranged in a gradually increasing form towards the front of the sliding table 2. The reaction forces formed by the three circular pressing heads 14 are as Figure 2 shown by the hollow arrows, in order to adapt to the form of the inner arc surface of the welding joint and be used to evenly counteract the centripetal force of the arc shrinking inwards.

[0033] In this embodiment, to make the sliding smoother, the number of sliders 10 is two, which are symmetrically arranged at the bottom of both sides of the sliding table 2.

[0034] In this embodiment, a support seat 17 is further arranged at the bottom of the second hinge arm 16. At least part of the top end of the support seat 17 is set as a rail surface. The bottom surface of the second hinge arm 16 is slidably installed on the support seat 17 by providing a groove surface matching the rail surface to support the second hinge arm 16 and avoid generating an inclined force in the Z direction.

[0035] Although the present invention has been described in detail with specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A welding anti-deformation tooling for a thin-plate snap-fit subframe, comprising an upper thin plate (7) and a lower thin plate (8) that are snap-fitted and welded to each other, characterized in that: The tooling includes a positioning pin (1) arranged on the mounting holes on both sides of the lower thin plate (8), and an anti-deformation mechanism symmetrically arranged at the inner arc welding joint between the upper thin plate (7) and the lower thin plate (8). The anti-deformation mechanism includes a first hinge mounting seat (3), a second hinge mounting seat (9), a multi-head hinge structure, a hinge control cylinder (4), a sliding table (2), and a slider (10). The sliding table (2) is slidably mounted on the slider (10). The hinge control cylinder (4) is arranged between the sliding table (2) and the first hinge mounting seat (3). The fixed end of the hinge control cylinder (4) is hinged to the second hinge mounting seat (9). The output end of the hinge control cylinder (4) is respectively hinged to the first hinge mounting seat (3) and the rear end of the sliding table (2) through the multi-head hinge structure. At least two L-shaped blocks (13) are arranged on the sliding table (2). A circular pressing head (14) for abutting against the flanging at the inner arc surface of the lower thin plate (8) is arranged at the front end of the L-shaped block (13).

2. The thin plate snap-fit subframe welding anti-deformation tooling according to claim 1, characterized in that: The multi-head hinge structure includes a first hinge arm (15) and a second hinge arm (16). The output end of the hinge control cylinder (4) is jointly hinged to one end of the first hinge arm (15) and the second hinge arm (16). The other end of the first hinge arm (15) is hinged to the first hinge mounting seat (3), and the other end of the second hinge arm (16) is hinged to the rear end of the sliding table (2).

3. The thin-plate snap-fit subframe welding anti-deformation tooling according to claim 1, characterized in that: A limit seat (11) is oppositely arranged at the front end of the sliding table (2). A limit block (12) for limiting the sliding distance of the sliding table (2) is mounted on the limit seat (11).

4. The thin-plate snap-fit subframe welding anti-deformation tooling according to claim 1, characterized in that: The included angle between at least two L-shaped blocks (13) is arranged in a gradually increasing form in the forward direction of the sliding table (2).

5. The thin plate snap - together subframe welding anti - deformation tooling according to claim 1, characterized in that: The number of the sliders (10) is two, which are symmetrically arranged at both sides of the bottom of the sliding table (2).

6. The thin plate snap - fit subframe welding anti - deformation tooling according to claim 2, wherein: A support seat (17) is further arranged at the bottom of the second hinge arm (16). At least part of the top end of the support seat (17) is set as a rail surface. The bottom surface of the second hinge arm (16) is slidably mounted on the support seat (17) through a groove surface arranged to match the rail surface.

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