Special tool for welding lifting support

Abstract

The utility model relates to the field of tools for welding lifting supports, in particular to a special tool for welding lifting supports, which comprises a first underframe upright column base and a second underframe upright column base, underframe supporting legs are arranged on two sides of the first underframe upright column base and the second underframe upright column base, and an upright column clamping device is arranged on one side of each underframe supporting leg. The side, away from each other, of the first underframe stand column base and the side, away from each other, of the second underframe stand column base are each provided with an underframe foundation platform, a pair of underframe clamping devices are symmetrically arranged on the underframe foundation platforms, and the first underframe stand column base and the second underframe stand column base serve as datum planes, and underframe supporting legs are matched with the underframe foundation platforms. Accurate alignment of the vehicle body chassis box type cross beam and the tool datum plane is achieved, and the problem that welding displacement is caused by inaccurate positioning, and the follow-up assembly precision is affected is solved.

Description

Technical Field

[0001] This utility model relates to the field of tooling for welding lifting brackets, and in particular to a special tooling for welding lifting brackets. Background Technology

[0002] In the fields of rail transit equipment or engineering machinery, lifting supports are key load-bearing structures, and their welding quality directly affects the stability and safety of the equipment. Traditional welding processes generally face the following technical bottlenecks in the positioning fixtures for lifting supports:

[0003] Existing tooling mostly uses fixed fixtures, which cannot be adapted to different specifications of chassis box-type crossbeams and vehicle body columns, resulting in inconsistent workpiece positioning references. During welding, displacement is easily caused by contact gaps, and the overall deformation usually exceeds ±4mm, which seriously affects the subsequent assembly accuracy.

[0004] Traditional clamping devices are mostly single-point rigid clamping devices, lacking a linkage adjustment mechanism, making it difficult to balance the thermal stress generated during welding. Especially at the cross-welding parts of the column and the base frame, stress concentration often leads to excessive radial deformation of the column, requiring manual adjustment after welding, which increases production costs.

[0005] The existing fixtures have a cumbersome clamping process, requiring frequent changes of tooling components for different workpiece sizes. The daily production capacity per shift can only reach 1.5 units, and the post-weld repair process accounts for more than 30%, which restricts the efficiency of mass production. Utility Model Content

[0006] The purpose of this utility model is to provide a special tooling for welding lifting brackets to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a special tooling for welding lifting supports, comprising a base column base one and a base column base two, both of which are provided with base support legs on both sides, and a column clamping device on one side of each base support leg. Both the base column base one and the base column base two are provided with base foundation platforms on their opposite sides, and a pair of base clamping devices are symmetrically arranged on the base foundation platforms.

[0008] As a preferred embodiment of the present invention, the base support leg includes a support base, a support pile is provided on the support base, and a support platform is provided on the top of the support pile.

[0009] As a preferred embodiment of this utility model, the column clamping device includes a base, a tall column on the base, and a connecting body on each side of the top of the tall column. A pair of adjusting clamping plates are provided on each connecting body, and several adjusting holes are provided on each adjusting clamping plate. A C-shaped clamp is provided between the pair of adjusting clamping plates. One end of the C-shaped clamp is hinged to an adjusting hole, and the other end of the C-shaped clamp is provided with a threaded connecting sleeve. A clamping screw is movably disposed within the threaded connecting sleeve and engages with the threaded connecting sleeve. A screw hole is opened in the middle of the C-shaped clamp, and a positioning screw is movably disposed within the screw hole and engages with the screw hole.

[0010] As a preferred embodiment of this utility model, the base clamping device includes a second support base, a second support pile on the second support base, a second support platform on the top of the second support pile, a second connecting body on the side of the second support pile away from the high column, a pair of second adjusting clamping plates on the second connecting body, a plurality of second adjusting holes on the second adjusting clamping plates, a second C-shaped clamp between the pair of second adjusting clamping plates, one end of the second C-shaped clamp being hinged to the second adjusting hole, and the other end of the second C-shaped clamp being provided with a threaded connecting sleeve, a second clamping screw being movably disposed inside the threaded connecting sleeve, and the second clamping screw engaging with the threaded connecting sleeve.

[0011] As a preferred embodiment of this utility model, one end of the clamping screw one, the positioning screw and the clamping screw two is provided with a top block, and the other end of the clamping screw one, the positioning screw and the clamping screw two is provided with a crank handle connector.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0013] By using the first and second base columns of the chassis as reference surfaces, and with the cooperation of the chassis support legs and the chassis foundation platform, the precise alignment of the box-shaped crossbeam of the vehicle chassis with the tooling reference surface is achieved, ensuring positioning accuracy and making the flatness error ≤0.5mm. This avoids the problem of welding displacement caused by inaccurate positioning, which affects the subsequent assembly accuracy.

[0014] Through the coordinated action of the twin screws (clamping screw one and positioning screw) of the column clamping device and the cooperation of the adjusting clamping plate two and clamping screw two of the base frame clamping device, multi-point linkage clamping and radial clamping fixation of the vehicle body column and the base frame box beam are achieved, effectively balancing the welding thermal stress, controlling the column welding deformation within ±1.5mm, and reducing the deformation caused by stress concentration;

[0015] By adjusting the clamping plates (adjusting clamping plate one and adjusting clamping plate two) and the screws (clamping screw one, clamping screw two, and positioning screw), it is possible to quickly adapt to workpieces of different specifications, simplify the clamping process, increase the daily production capacity efficiency of a single shift by 33%, and at the same time reduce the amount of correction work in the post-weld repair process, thereby reducing the overall production cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a tooling drawing of the base column of the frame of this utility model;

[0018] Figure 3 These are tooling drawings for two parts of the base column of this utility model;

[0019] Figure 4 This is a top view of the column clamping device of this utility model;

[0020] Figure 5 This is a side view of a tooling fixture on the base of the frame column of this utility model.

[0021] Reference numerals: Base column base 101, Base column base 2 102, Base support leg 2, Support seat 1 201, Support pile 1 202, Support platform 1 203, Base foundation platform 3, Column clamping device 4, Base 401, High column 402, Connector 1 403, Adjusting clamping plate 1 404, Adjusting hole 1 405, C-clamp 1 406, Threaded connecting sleeve 1 407, Clamping screw 1 408, Positioning screw 409, Base clamping device 5, Support seat 2 501, Support pile 2 502, Support platform 2 503, Connector 2 504, Adjusting clamping plate 2 505, Adjusting hole 2 506, C-clamp 2 507, Threaded connecting sleeve 2 508, Clamping screw 2 509, Top block 6, Crank handle connector 7. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0023] This utility model provides a technical solution: a special tooling for welding lifting brackets, such as... Figure 1As shown, it includes a base frame column base one 101 and a base frame column base two 102. Both sides of the base frame column base one 101 and the base frame column base two 102 are provided with base frame support legs 2. One side of the base frame support leg 2 is provided with a column clamping device 4. The sides of the base frame column base one 101 and the base frame column base two 102 that are far apart are provided with a base frame foundation platform 3. A pair of base frame clamping devices 5 are symmetrically arranged on the base frame foundation platform 3.

[0024] like Figure 3 As shown, the base support leg 2 includes a support base 201, a support pile 202 is provided on the support base 201, and a support platform 203 is provided on the top of the support pile 202.

[0025] like Figures 2-5 As shown, the column clamping device 4 includes a base 401, on which a tall column 402 is fixed by hexagonal bolts. Connecting bodies 403 are fixed to both sides of the top of the tall column 402 by hexagonal bolts. A pair of adjusting clamping plates 404 are fixed to the connecting bodies 403 by hexagonal bolts. Several adjusting holes 405 are provided on the adjusting clamping plates 404. A C-clamp 406 is provided between the pair of adjusting clamping plates 404. One end of the C-clamp 406 is hinged to the adjusting hole 405, and the other end of the C-clamp 406 is provided with a threaded connecting sleeve 407. A clamping screw 408 is movably disposed within the threaded connecting sleeve 407 and engages with the threaded connecting sleeve 407. A screw hole is opened in the middle of the C-clamp 406, and a positioning screw 409 is movably disposed within the screw hole and engages with the screw hole.

[0026] like Figure 2 , Figure 5 As shown, the base clamping device 5 includes a support base 501, a support pile 502 on the support base 501, a support platform 503 on the top of the support pile 502, a connecting body 504 connected to the side of the support pile 502 away from the high column 402 by a hexagonal bolt, a pair of adjusting clamping plates 505 on the connecting body 504, several adjusting holes 506 on the adjusting clamping plates 505, a C-shaped clamp 507 between the pair of adjusting clamping plates 505, one end of the C-shaped clamp 507 is hinged to the adjusting hole 506, and the other end of the C-shaped clamp 507 is provided with a threaded connecting sleeve 508, a clamping screw 509 is movably arranged in the threaded connecting sleeve 508, and the clamping screw 509 meshes with the threaded connecting sleeve 508.

[0027] like Figure 4 As shown, a top block 6 is provided at one end of clamping screw 408, positioning screw 409 and clamping screw 509, and a crank handle connector 7 is provided at the other end of clamping screw 408, positioning screw 409 and clamping screw 509.

[0028] In specific implementation, the first step is tooling positioning and underframe hoisting. The pre-assembled car body underframe box beam is smoothly hoisted into the tooling using the lifting device assembly position. The front and rear parts of the car body underframe box are respectively aligned with the underframe column base 101 and the underframe column base 2102 as reference planes to ensure that the car body underframe box beam is initially aligned with the tooling reference plane.

[0029] Step 2: Position the underframe support leg 2, and slowly lower the box-shaped crossbeam of the vehicle underframe until the support platform 203 of the underframe support leg 2 is fully in contact with the box-shaped crossbeam of the vehicle underframe. Using the box-shaped crossbeam of the vehicle underframe as the only tooling positioning reference part for the entire vehicle, use measuring tools to ensure that its flatness error with the support platform 203 is ≤0.5mm.

[0030] Step 3: Clamping and fixing the base frame (clamping and installing the box-type crossbeam of the vehicle body base frame). After the base frame is positioned, operate the base frame clamping device 5: According to the size of the box-type crossbeam of the vehicle body base frame, adjust the hinge position of the C-type clamp 507 by adjusting the adjustment hole 506 of the clamping plate 505, and align it with the clamping point of the box-type crossbeam of the vehicle body base frame; rotate the clamping screw 509 to move it along the threaded connecting sleeve 508, and press the box-type crossbeam of the vehicle body base frame onto the top block 6 and the adjusting clamping plate 505; check each clamping point simultaneously to ensure multi-point linkage clamping and control the displacement error of the box-type crossbeam of the vehicle body base frame ≤0.2mm during the welding process.

[0031] Step 4: Column clamping to prevent deformation (clamping and installing the vehicle body column). Use column clamping device 4: Adjust the position and angle of C-clamp 406 by adjusting the adjustment hole 405 of clamping plate 404, aligning it with the clamping position of the vehicle body column; first rotate the positioning screw 409 to move it along the screw hole in the middle of C-clamp 406, and initially fix it against the vehicle body column from the side; then rotate the clamping screw 408, and drive the top block 6 to press against the top surface of the vehicle body column through the threaded connecting sleeve 407; the combined action of the two screws forms a radial clamping force, balancing the welding thermal stress, controlling the welding deformation of the vehicle body column within ±1.5mm, and completing the rapid positioning welding of the lifting bracket.

[0032] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A special tooling for welding lifting brackets, characterized in that: It includes a base column base one (101) and a base column base two (102). Both sides of the base column base one (101) and the base column base two (102) are provided with base support legs (2). One side of the base support leg (2) is provided with a column clamping device (4). The sides of the base column base one (101) and the base column base two (102) that are far apart are provided with a base foundation platform (3). A pair of base clamping devices (5) are symmetrically arranged on the base foundation platform (3).

2. The special tooling for welding lifting brackets according to claim 1, characterized in that: The base support leg (2) includes a support base (201), a support pile (202) is provided on the support base (201), and a support platform (203) is provided on the top of the support pile (202).

3. The special tooling for welding lifting brackets according to claim 2, characterized in that: The column clamping device (4) includes a base (401), on which a tall column (402) is provided. Connectors (403) are provided on both sides of the top of the tall column (402). A pair of adjusting clamping plates (404) are provided on each connecting plate (403). Several adjusting holes (405) are provided on each adjusting clamping plate (404). A C-shaped clamp (406) is provided between the pair of adjusting clamping plates (404). 6) One end is hinged to the adjustment hole (405), and the other end of the C-clamp (406) is provided with a threaded connecting sleeve (407). A clamping screw (408) is movably arranged in the threaded connecting sleeve (407). The clamping screw (408) meshes with the threaded connecting sleeve (407). A screw hole is opened in the middle of the C-clamp (406). A positioning screw (409) is movably arranged in the screw hole. The positioning screw (409) meshes with the screw hole.

4. The special tooling for welding lifting brackets according to claim 3, characterized in that: The base clamping device (5) includes a support base two (501), a support pile two (502) on the support base two (501), a support platform two (503) on the top of the support pile two (502), a connecting body two (504) on the side of the support pile two (502) away from the high column (402), a pair of adjusting clamping plates two (505) on the connecting body two (504), and a number of... A second adjustment hole (506) is provided, and a C-shaped clamp (507) is provided between a pair of adjustment clamping plates (505). One end of the C-shaped clamp (507) is hinged to the second adjustment hole (506), and the other end of the C-shaped clamp (507) is provided with a threaded connecting sleeve (508). A clamping screw (509) is movably provided inside the threaded connecting sleeve (508), and the clamping screw (509) meshes with the threaded connecting sleeve (508).

5. The special tooling for welding lifting brackets according to claim 4, characterized in that: One end of the clamping screw one (408), the positioning screw (409) and the clamping screw two (509) is provided with a top block (6), and the other end of the clamping screw one (408), the positioning screw (409) and the clamping screw two (509) is provided with a crank connector (7).

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