An assembly and welding fixture for a shock absorber bracket subassembly and its usage method

Abstract

The present invention relates to an assembly and welding fixture for a shock absorber bracket sub-assembly and a method for using the same. Among them, the assembly and welding fixture includes a shock absorber bracket positioning device, a bracket fixing plate positioning device, a shock absorber bracket pin positioning device, a shock absorber small bracket positioning device, and a pressing device. The bracket fixing plate positioning device and the shock absorber bracket pin positioning device include a first bottom plate, a U-shaped block positioning block, a limiting block, and an angle block. The U-shaped block positioning block is fixedly connected to the bottom plate through a keyway and screws. The limiting block is fixedly connected to the U-shaped block positioning block through screws. The angle block is installed in the limiting block and is fixedly connected to the bottom plate through screws. The tooling positions of the bracket fixing plate positioning device and the shock absorber bracket pin positioning device correspond to each other. Through the ingenious structural design of the fixture itself, the dimensional accuracy and stability of the assembly and welding of the shock absorber bracket sub-assembly are ensured, the product quality is guaranteed, the processing efficiency is greatly improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive welding jigs, and particularly to an assembly welding jig for a shock absorber bracket sub-assembly and its usage method. Background Art

[0002] Since the rear axle housing assemblies required for different models of automobiles are different, and the shock absorber bracket sub-assemblies of the components that make up different models of rear axle housing assemblies are all different. For example, the shock absorber bracket sub-assembly on the rear axle housing assembly of the Chang'an P201 large pickup truck model mainly consists of a shock absorber bracket pin, a bracket fixing plate, a shock absorber bracket, and a shock absorber small bracket. After the shock absorber bracket sub-assembly is welded, it is then welded to the rear axle housing assembly. The installation dimensions of the shock absorber bracket sub-assembly directly affect the overall performance of the rear axle. Therefore, by using a jig for assembly spot welding, relevant dimensions can be guaranteed and production efficiency can be rapidly improved.

[0003] Since the shock absorber bracket sub-assembly is composed of four irregular component structures, a specific jig structure is required to clamp and fix the shock absorber bracket pin, the bracket fixing plate, the shock absorber bracket, and the shock absorber small bracket. Currently, when welding and processing the components of pickup truck rear axles, there is no special welding jig for the shock absorber bracket pin, the bracket fixing plate, the shock absorber bracket, and the shock absorber small bracket. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects existing in the prior art, and to provide an assembly welding jig for a shock absorber bracket sub-assembly and its usage method.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] An assembly welding jig for a shock absorber bracket sub-assembly includes a shock absorber bracket positioning device, a bracket fixing plate positioning device, a shock absorber bracket pin positioning device, a shock absorber small bracket positioning device, and a pressing device. The bracket fixing plate positioning device and the shock absorber bracket pin positioning device include a base plate, a U-shaped block positioning block, a limiting block, and an angle block;

[0007] The U-shaped block positioning block is fixedly connected to the base plate through a keyway and screws. The limiting block is fixedly connected to the U-shaped block positioning block through screws. The angle block is installed in the limiting block and is fixedly connected to the base plate through screws. The tooling positions of the bracket fixing plate positioning device and the shock absorber bracket pin positioning device correspond to each other.

[0008] Further, the shock absorber bracket positioning device includes an arc positioning block and a stop block; wherein, the arc positioning block is fixedly connected to the base plate through a keyway and screws, and the stop block is fixedly connected to the arc positioning block through a keyway and screws.

[0009] Further, the shock absorber small bracket positioning device includes a positioning block, a positioning cylinder, a shock absorber small bracket positioning block, and a magnet. Among them, the positioning block is fixedly connected to the bottom plate through a keyway and screws. The shock absorber small bracket positioning block is fixedly connected to the bottom plate through a keyway and screws. The magnet is connected to the shock absorber small bracket positioning block by interference fit. The positioning cylinder is connected to the bottom plate by interference fit.

[0010] Further, the pressing device includes a cushion block and a vertical quick clamp. The cushion block is fixedly connected to the bottom plate through screws. The vertical quick clamp is fixedly connected to the cushion block through screws.

[0011] A method for using an assembly welding fixture for a small assembly of a shock absorber bracket includes the following steps:

[0012] Step 1: First, install the hole of the workpiece bracket fixing plate on the shock absorber bracket pin, and then place the shock absorber bracket pin on the U-shaped block positioning block. The end face of the shock absorber bracket pin is closely attached to the end face of the U-shaped block positioning block. The bracket fixing plate is placed in the limit block. One end face of the bracket fixing plate is closely attached to the end face of the shock absorber bracket pin, and the other end face of the bracket fixing plate is closely attached to the angle block. Pull the vertical quick clamp to make the vertical quick clamp press and hold the shock absorber bracket pin in the U-shaped groove of the U-shaped block positioning block. The clamping arm of the vertical quick clamp can rotate 0 - 105 degrees. It is in the pressed state at 0 degrees and has a self-locking function.

[0013] Step 2: Place the workpiece shock absorber bracket on the arc positioning block and between the two stoppers on the arc positioning block. Pull the vertical quick clamp to make the vertical quick clamp press and hold the shock absorber bracket closely against the arc on the arc positioning block. The shock absorber bracket is closely attached to the bracket fixing plate, and the inner side surface of the shock absorber bracket is closely attached to the cylindrical surface of the bracket pin.

[0014] Step 3: Spot welding. The welding parameters are current 150 - 240A, voltage 22 - 28V, and gas flow rate 15 - 25L / Min. Perform spot welding according to the process requirements. Through spot welding, the shock absorber bracket pin, the bracket fixing plate, and the shock absorber bracket are spot welded into one piece and the relevant dimensions are consistent with the relevant dimensions on the drawing.

[0015] Step 4: Loosen the two vertical quick clamps, take out the small assembly of the shock absorber bracket pin, the bracket fixing plate, and the shock absorber bracket that has been spot welded. Insert the shock absorber bracket pin of the spot welded small assembly into the hole of the positioning cylinder. The end face of the shock absorber bracket pin is closely attached to the end face of the positioning cylinder. The shock absorber bracket is stuck in the U-shaped groove of the positioning block. Place the shock absorber small bracket in the positioning groove of the shock absorber small bracket positioning block. Through the suction force of the magnet, the end face of the shock absorber small bracket is closely attached to the positioning groove of the shock absorber small bracket positioning block, and the other end face of the shock absorber small bracket is closely attached to the bracket fixing plate.

[0016] Step 5: Spot welding. The welding parameters are current 150 - 240A, voltage 22 - 28V, and gas flow rate 15 - 25L / Min. Perform spot welding according to the process requirements. Through spot welding, the shock absorber small bracket, shock absorber bracket pin, bracket fixing plate, and shock absorber bracket are spot welded into a shock absorber bracket small assembly, and the relevant dimensions are consistent with the relevant dimensions on the drawing.

[0017] Step 6: After spot welding, take out the shock absorber bracket small assembly by hand from bottom to top.

[0018] The beneficial effects of the present invention are as follows: The present invention separately installs and fixes the shock absorber bracket, bracket fixing plate, shock absorber bracket pin, and shock absorber small bracket independently. The operation is simple and the effect is stable. During the assembly process, through the ingenious structural design of the fixture itself, the dimensional accuracy and stability of the shock absorber bracket small assembly during assembly and welding are guaranteed, the product quality is ensured, the processing efficiency is greatly improved, and the labor intensity of workers is reduced. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a top view schematic diagram of the present invention;

[0021] Figure 3 is Figure 2 a cross-sectional schematic diagram along line B - B in

[0022] Figure 4 is Figure 2 a cross-sectional schematic diagram along line C - C in

[0023] Figure 5 is a schematic structural diagram of the workpiece in the embodiment of the present invention.

[0024] Description of the reference numerals: bottom plate 1, U-shaped block positioning block 2, cushion block 3, vertical quick clamp 4, limit block 5, angle block 6, arc positioning block 7, stop block 8, positioning block 9, positioning cylinder 10, shock absorber small bracket positioning block 11, magnet 12, shock absorber bracket pin 13, bracket fixing plate 14, shock absorber bracket 15, shock absorber small bracket 16. Embodiment

[0025] The present invention can be specifically implemented through the technologies described in the invention content. The present invention can be further described through the following embodiments, and the scope of the present invention is not limited to the following embodiments.

[0026] As Figures 1 to 5 shown, a shock absorber bracket small assembly assembly and welding fixture includes a shock absorber bracket positioning device, a bracket fixing plate positioning device, a shock absorber bracket pin positioning device, a shock absorber small bracket positioning device, and a pressing device;

[0027] Among them, the bracket fixing plate positioning device and the shock absorber bracket pin positioning device include a bottom plate 1, a U-shaped block positioning block 2, a limit block 5, and an angle block 6. The U-shaped block positioning block 2 is fixedly connected to the bottom plate 1 through a keyway and screws. The limit block 5 is fixedly connected to the block positioning block 2 through screws. The angle block 6 is installed in the limit block 5 and is fixedly connected to the bottom plate 1 through screws. The tooling positions of the bracket fixing plate positioning device and the shock absorber bracket pin positioning device correspond to each other.

[0028] The pressing device includes a cushion block 3 and a vertical quick clamp 4. The cushion block 3 is fixedly connected to the bottom plate 1 through screws, and the vertical quick clamp 4 is fixedly connected to the cushion block 3 through screws.

[0029] The shock absorber bracket positioning device includes an arc positioning block 7 and a stop block 8. The arc positioning block 7 is fixedly connected to the bottom plate 1 through a keyway and screws, and the stop block 8 is fixedly connected to the arc positioning block 7 through a keyway and screws.

[0030] The shock absorber small bracket positioning device includes a positioning block 9, a positioning cylinder 10, a shock absorber small bracket positioning block 11, and a magnet 12. The positioning block 9 is fixedly connected to the bottom plate 1 through a keyway and screws. The shock absorber small bracket positioning block 11 is fixedly connected to the bottom plate 1 through a keyway and screws. The magnet 12 is connected to the shock absorber small bracket positioning block 11 by interference fit, and the positioning cylinder 10 is connected to the bottom plate 1 by interference fit.

[0031] The usage method of the shock absorber bracket small assembly assembling and welding fixture is as follows:

[0032] Step 1: First, install the hole of the workpiece bracket fixing plate 14 on the shock absorber bracket pin 13, and then place the shock absorber bracket pin 13 on the U-shaped block positioning block 2. The end face of the shock absorber bracket pin 13 is closely attached to the end face of the U-shaped block positioning block 2. The bracket fixing plate 14 is placed in the limit block 5. One end face of the bracket fixing plate 14 is closely attached to the end face of the shock absorber bracket pin 13, and the other end face of the bracket fixing plate 14 is closely attached to the angle block 6. Pull the vertical quick clamp 4 to make the vertical quick clamp 4 press and hold the shock absorber bracket pin 13 in the U-shaped groove of the U-shaped block positioning block 2. The clamping arm of the vertical quick clamp 4 can rotate 0 - 105 degrees. When it is at 0 degree, it is in the pressing state and has a self-locking function.

[0033] Step 2: Place the workpiece shock absorber bracket 15 on the arc positioning block 7 and between the two stop blocks 8 on the arc positioning block 7. Pull the vertical quick clamp 4 to make the vertical quick clamp 4 press and hold the shock absorber bracket 15 closely attached to the arc on the arc positioning block 7. The shock absorber bracket 15 is closely attached to the bracket fixing plate 14, and the inner side surface of the shock absorber bracket 15 is closely attached to the cylindrical surface of the bracket pin 13.

[0034] Step 3: Tack welding. The welding parameters are current 150 - 240 A, voltage 22 - 28 V, and gas flow rate 15 - 25 L / Min. Perform tack welding according to the process requirements. Through tack welding, the shock absorber bracket pin 13, bracket fixing plate 14, and shock absorber bracket 15 are tack welded into one piece, and the relevant dimensions are consistent with the relevant dimensions on the drawing.

[0035] Step 4: Loosen the two vertical quick clamps 4, and take out the small assembly of the shock absorber bracket pin 13, bracket fixing plate 14, and shock absorber bracket 15 that has been tack welded. Insert the shock absorber bracket pin 13 of the tack welded small assembly into the hole of the positioning cylinder 10. The end face of the shock absorber bracket pin is close to the end face of the positioning cylinder 10. The shock absorber bracket 15 is stuck in the U-shaped groove of the positioning block 9. Place the shock absorber small bracket 16 in the positioning groove of the shock absorber small bracket positioning block 11. Through the suction force of the magnet 12, the end face of the shock absorber small bracket 16 is tightly attached to the positioning groove of the shock absorber small bracket positioning block 11, and the other end face of the shock absorber small bracket 16 is tightly attached to the bracket fixing plate 14.

[0036] Step 5: Tack welding. The welding parameters are current 150 - 240 A, voltage 22 - 28 V, and gas flow rate 15 - 25 L / Min. Perform tack welding according to the process requirements. Through tack welding, the shock absorber small bracket 16, shock absorber bracket pin 13, bracket fixing plate 14, and shock absorber bracket 15 are tack welded into a shock absorber bracket small assembly, and the relevant dimensions are consistent with the relevant dimensions on the drawing.

[0037] Step 6: After the tack welding is completed, take out the shock absorber bracket small assembly by hand from the bottom up.

[0038] In summary, the present invention respectively assembles and fixes the shock absorber small bracket, shock absorber bracket pin, bracket fixing plate, and shock absorber bracket. The operation is simple and the effect is stable. During the assembly process, through the ingenious structural design of the fixture itself, the dimensional accuracy and stability of the assembly and welding of the shock absorber bracket small assembly are guaranteed, the product quality is ensured, the processing efficiency is greatly improved, and the labor intensity of workers is reduced. The present invention is applicable to a wide range of products. Through the assembly and welding of the shock absorber bracket small assembly with this fixture, the quality is stable.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small assembly welding fixture for a shock absorber bracket, comprising a shock absorber bracket positioning device, a bracket fixing plate positioning device, a shock absorber bracket pin positioning device, a small shock bracket positioning device and a pressing device, characterized in that, The bracket fixing plate positioning device and the shock absorber bracket pin positioning device include a base plate (1), a U-shaped block positioning block (2), a limit block (5), and an angle block (6). The U-shaped block positioning block (2) is fixedly connected to the base plate (1) through a keyway and screws. The limit block (5) is fixedly connected to the U-shaped block positioning block (2) through screws. The angle block (6) is installed in the limit block (5), and the angle block (6) is fixedly connected to the base plate (1) through screws. The tooling positions of the bracket fixing plate positioning device and the shock absorber bracket pin positioning device correspond to each other.

2. The assembling and welding jig for the small assembly of the shock absorber bracket according to claim 1, wherein The shock absorber bracket positioning device includes an arc positioning block (7) and a stop block (8). Among them, the arc positioning block (7) is fixedly connected to the base plate (1) through a keyway and screws, and the stop block (8) is fixedly connected to the arc positioning block (7) through a keyway and screws.

3. The assembling and welding jig for the small assembly of the shock absorber bracket according to claim 2, characterized in that, The shock absorber small bracket positioning device includes a positioning block (9), a positioning cylinder (10), a shock absorber small bracket positioning block (11), and a magnet (12). Among them, the positioning block (9) is fixedly connected to the base plate (1) through a keyway and screws, the shock absorber small bracket positioning block (11) is fixedly connected to the base plate (1) through a keyway and screws, the magnet (12) is connected to the shock absorber small bracket positioning block (11) by interference fit, and the positioning cylinder (10) is connected to the base plate (1) by interference fit.

4. The assembling and welding fixture for the small assembly of the shock absorber bracket according to claim 3, characterized in that The pressing device includes a cushion block (3) and a vertical quick clamp (4). The cushion block (3) is fixedly connected to the base plate (1) through screws, and the vertical quick clamp (4) is fixedly connected to the cushion block (3) through screws.

5. The usage method of an assembly and welding fixture for a small assembly of a shock absorber bracket according to claim 4, characterized in that, It includes the following steps: Step 1: First, install the hole of the workpiece bracket fixing plate (14) on the shock absorber bracket pin (13), and then place the shock absorber bracket pin (13) on the U-shaped block positioning block (2). The end face of the shock absorber bracket pin (13) is closely attached to the end face of the U-shaped block positioning block (2). The bracket fixing plate (14) is placed in the limit block (5). One end face of the bracket fixing plate (14) is closely attached to the end face of the shock absorber bracket pin (13), and the other end face of the bracket fixing plate (14) is closely attached to the angle block (6). Pull the vertical quick clamp (4) to make the vertical quick clamp (4) press the shock absorber bracket pin (13) in the U-shaped groove of the U-shaped block positioning block (2). The clamping arm of the vertical quick clamp (4) can rotate 0 - 105 degrees. When it is at 0 degree, it is in a pressing state and has a self-locking function. Step 2: Place the workpiece shock absorber bracket (15) on the arc positioning block (7) and between the two stop blocks (8) on the arc positioning block (7). Pull the vertical quick clamp (4) to make the vertical quick clamp (4) press the shock absorber bracket (15) closely against the arc on the arc positioning block (7). The shock absorber bracket (15) is closely attached to the bracket fixing plate (14), and the inner side surface of the shock absorber bracket (15) is closely attached to the cylindrical surface of the shock absorber bracket pin (13). Step 3: Tack welding. The welding parameters are current 150 - 240A, voltage 22 - 28V, and gas flow rate 15 - 25L / Min. Perform tack welding according to the process requirements. Through tack welding, the shock absorber bracket pin (13), bracket fixing plate (14), and shock absorber bracket (15) are tack welded into one piece, and the relevant dimensions are consistent with the relevant dimensions on the drawing; Step 4: Loosen the two vertical quick clamps (4), take out the sub-assembly of the shock absorber bracket pin (13), bracket fixing plate (14), and shock absorber bracket (15) that has been tack welded. Insert the shock absorber bracket pin (13) of the tack welded sub-assembly into the hole of the positioning cylinder (10). The end face of the shock absorber bracket pin is closely attached to the end face of the positioning cylinder (10). The shock absorber bracket (15) is stuck in the U-shaped groove of the positioning block (9). Place the shock absorber small bracket (16) in the positioning groove of the shock absorber small bracket positioning block (11). Through the suction force of the magnet (12), the end face of the shock absorber small bracket (16) is closely attached to the positioning groove of the shock absorber small bracket positioning block (11), and the other end face of the shock absorber small bracket (16) is closely attached to the bracket fixing plate (14); Step 5: Tack welding. The welding parameters are current 150 - 240A, voltage 22 - 28V, and gas flow rate 15 - 25L / Min. Perform tack welding according to the process requirements. Through tack welding, the shock absorber small bracket (16), shock absorber bracket pin (13), bracket fixing plate (14), and shock absorber bracket (15) are tack welded into a shock absorber bracket sub-assembly, and the relevant dimensions are consistent with the relevant dimensions on the drawing; Step 6: After tack welding is completed, take out the shock absorber bracket sub-assembly by hand from bottom to top.

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