Arc welding clamp for filter in automobile exhaust system

Abstract

The utility model discloses and provides an arc welding clamp for a filter in an automobile exhaust system, which belongs to the technical field of pipeline welding and comprises a pressing device and a jacking device, the jacking device and the pressing device are respectively arranged on a mounting frame A and a mounting frame B, the mounting frame B is further provided with a variable-diameter positioning mould, and the variable-diameter positioning mould is arranged on the jacking device. According to the arc welding clamp, through the reasonable layout design of the structure, stable butt joint of the filter and the variable-diameter component can be achieved, the butt joint opening is located in the horizontal position, welding is convenient, and the welding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline welding, in particular to an arc welding fixture for a filter in an automobile exhaust system. Background Art

[0002] An automobile's exhaust system generally consists of an exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, muffler, and tailpipe. The vehicle's exhaust system primarily removes engine exhaust while minimizing pollution and noise. It's primarily used in light vehicles, minivans, buses, motorcycles, and other motor vehicles. Its operating principle: Exhaust gas from the engine cylinders is discharged through the exhaust valves, then flows through the exhaust manifolds of each cylinder to the exhaust header. There, it is purified by the three-way catalytic converter and silenced by the muffler before exiting the vehicle through the tailpipe.

[0003] A single exhaust system for a certain automobile consists of an exhaust manifold, front exhaust ribs, a catalytic converter, an exhaust temperature sensor, a muffler, and a rear exhaust pipe. Arc welding process requirements for exhaust components vary widely across various automotive exhaust system components. The welding unit layout varies depending on the workpiece's shape and welding characteristics. The exhaust system can be divided into two parts: the hot end and the cold end, based on the proximity of the main functional modules to the engine. The hot end directly connects to the engine exhaust port and primarily includes the manifold, purifier, bellows, secondary purifier, and accessories such as the hook flange. Due to its compact chassis location, component shapes vary significantly, resulting in a complex weld distribution. Furthermore, since its primary function is exhaust gas purification, high weld sealing requirements are required. The cold end connects to the hot end and primarily includes the mid- and rear-stage mufflers, as well as accessories such as the hook flange. The cold end assembly is typically long, with welds often consisting of small-diameter circumferential seams. When the rear muffler package is welded, press-fit welding is often required, resulting in a large number of welds.

[0004] While existing technology can produce high-quality, diverse automotive exhaust pipes, the skill levels of workers vary widely during production, leading to quality issues such as loose joints, insufficient corrosion resistance, and limited pressure-bearing capacity. In particular, when welding filters to reducers, the stability of the joints is low, resulting in a loose joint and uneven welding. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of the utility model is to provide an arc welding fixture for the filter in the automobile exhaust system. Mainly through the reasonable design of the fixture tooling, the filter and the diameter-changing component can be fixed together and then welded.

[0006] The technical solution adopted by this utility model:

[0007] An arc welding fixture for a filter in an automobile exhaust system includes a pressing device and a lifting device. The lifting device and the pressing device are respectively arranged on a mounting frame A and a mounting frame B. The mounting frame B is also provided with a variable diameter positioning jig, which is arranged on the lifting device.

[0008] In the above technical solution, the clamping device includes a pad, which is arranged on the mounting frame A and has a V-shaped groove on its upper surface. The mounting frame A is also provided with a stopper and a clamping assembly. The clamping assembly and the stopper are distributed in two directions of the pad and the two directions are perpendicular to each other with respect to the center point of the pad, wherein the stopper is located on the horizontal axis of the V-shaped groove.

[0009] In the above technical solution, further, the clamping assembly includes a cylinder A, which is arranged on a mounting frame A through a base. A horizontal pressure rod is provided on the piston of the cylinder A, a pressure block is provided at the free end of the pressure rod, and an arc-shaped notch is provided at the bottom of the pressure block.

[0010] In the above technical solution, further, the pressing block is located directly above the cushion block and is connected to the pressing rod through a screw.

[0011] In the above technical solution, further, a cylinder valve A is provided on the base, and the cylinder A is controlled by the cylinder valve A.

[0012] In the above technical solution, further, the jacking device includes a mounting block, a variable diameter positioning jig is arranged on one side of the mounting block, a jacking assembly is arranged on the other symmetrical side thereof, a slider is arranged at the bottom of the mounting block, a slide rail is arranged on the mounting frame B, and the slider is arranged on the slider.

[0013] In the above technical solution, further, the jacking assembly includes a fixed seat, which is arranged on the mounting frame B, and a cylinder B is arranged on the fixed seat. The piston of the cylinder B is provided with a push rod, and two retaining rings are provided on the push rod. A connecting plate is provided on the other side of the mounting block, and the two retaining rings are clamped in the arc groove of the connecting block.

[0014] In the above technical solution, further, a cylinder valve B is provided on the base, and the cylinder B is controlled by the cylinder valve B.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The arc welding fixture designed by the utility model can achieve stable docking of the filter and the reducer through the reasonable layout design of the structure, and by changing the shapes of the mounting frame A and the mounting frame B, the docking interface is located in a horizontal position, which facilitates welding and improves welding quality.

[0017] 2. The clamping device designed in this utility model is composed of a pad, a stopper and a pressing block. Cylinder A controls the movement of the pressing block. The pad, the stopper and the pressing block are used to limit the filter in three directions to improve the stability of the filter fixation.

[0018] 3. The lifting device designed in the present invention is composed of a mounting block, a slider, a slide rail, a cylinder B and a push rod. The push rod is connected to the mounting block through a connecting plate. The mounting block is pushed to move on the slide rail by the cylinder, thereby realizing the variable diameter positioning jig to approach the filter. The stable movement of the variable diameter positioning jig can be achieved through the cooperation of the cylinder, the slider and the slide rail.

[0019] 4. The variable diameter positioning jig designed in this utility model is used to secure the reducer. It is a T-shaped seat with a through hole along its central axis. The through hole includes a large constant diameter section, a variable diameter section, and a small constant diameter section. The wall of the reducer is partially located within the variable diameter section and partially located within the small constant diameter section. The weld joint is located outside the large constant diameter section. This structural design is reasonable and can stably restrain the reducer, preventing misalignment during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a front view of an arc welding fixture for a filter in an automobile exhaust system in Example 1.

[0022] Figure 2 This is an upper left perspective view of an arc welding fixture for a filter in an automobile exhaust system in Example 1.

[0023] Figure 3 This is a top right perspective view of an arc welding fixture for a filter in an automobile exhaust system in Example 1.

[0024] Figure 4 This is a three-dimensional diagram of the clamping device in Example 2.

[0025] Figure 5 This is a top right perspective view of the jacking device in Example 3.

[0026] Figure 6 This is a top left perspective view of the jacking device in Example 3.

[0027] Figure 7 This is a three-dimensional diagram of the variable diameter positioning mold.

[0028] Among them, 1. Base, 2. Mounting frame A, 3. Mounting frame B, 4. Spacer, 5. Stopper, 6. Cylinder A, 7. Pressure rod; 8. Screw, 9. Pressure block, 10. Filter, 11. Variable diameter positioning jig, 12. Mounting block, 13. Connecting plate, 14. Push rod, 15. Cylinder B, 16. Fixed seat, 17. Slide rail, 18. Slider, 19. Cylinder valve A, 20. Cylinder valve B. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] Example 1

[0032] Reference Figure 1-3 As shown, this embodiment provides an arc welding fixture for a filter 10 in an automobile exhaust system, including a clamping device and a lifting device, which are respectively arranged on a mounting frame A2 and a mounting frame B3. A variable diameter positioning jig 11 is also provided on the mounting frame B3, and the variable diameter positioning jig 11 is arranged on the lifting device.

[0033] The mounting bracket A2 and the mounting bracket B3 are both arranged on the base 1 .

[0034] The above-mentioned arc welding fixture designed in this embodiment is used to achieve the docking of the filter 10 and the welding joint of the reducer. Specifically, the filter 10 is placed on the clamping device and fixed, and then the reducer is placed in the reducer positioning jig 11. The jacking device is used to push the reducer positioning jig 11 closer to the filter 10 to achieve the docking of the reducer and the filter 10.

[0035] like Figure 7 As shown, the variable diameter positioning jig 11 is a T-shaped seat, and the T-shaped seat is provided with a through hole along its central axis. The through hole includes a large constant diameter section, a variable diameter section and a small constant diameter section. The wall of the variable diameter piece is partially located in the variable diameter section and partially located in the small constant diameter section. The welding port is located outside the large constant diameter section.

[0036] Example 2

[0037] This embodiment introduces the pressing device in detail.

[0038] like Figure 4 As shown, the clamping device includes a pad 4, which is arranged on the mounting frame A2 and has a V-shaped groove on its upper surface. The mounting frame A2 is also provided with a stopper 5 and a clamping assembly. The clamping assembly and the stopper 5 are distributed in two directions of the pad 4 and the two directions are perpendicular to each other with respect to the center point of the pad 4, wherein the stopper 5 is located on the horizontal axis of the V-shaped groove.

[0039] The clamping assembly includes a cylinder A6, which is set on the mounting frame A2 through a base 1. A horizontal pressure rod 7 is set on the piston of the cylinder A6, and a pressure block 9 is set at the free end of the pressure rod 7. The bottom of the pressure block 9 is provided with an arc-shaped notch.

[0040] The pressing block 9 is located directly above the cushion block 4 and is connected to the pressing rod 7 via a screw 8 .

[0041] A cylinder valve A19 is provided on the base 1, and the cylinder A6 is controlled by the cylinder valve A19.

[0042] Place the wall of the filter 10 into the V-shaped groove, with one end of the filter 10 resting against the retaining wall of the block 5 and the other end facing the opening of the reducer positioning jig 11. Place the reducer into the reducer positioning jig 11 with the welded joint facing outward. Cylinder A6 is activated by controlling the cylinder valve A19, and the pressure block 9 moves downward to squeeze the upper wall of the filter 10, limiting the position of the filter 10. Then, the lifting device is activated, and the welded joint of the reducer approaches the filter 10, achieving docking between the reducer and the filter 10.

[0043] By changing the shapes of the mounting bracket A2 and the mounting bracket B3, the butt welding joint between the reducer and the filter 10 is located in a horizontal direction, thereby facilitating the welding operation.

[0044] Example 3

[0045] This embodiment introduces the jacking device in detail.

[0046] like Figure 5 、 6 As shown, the jacking device includes a mounting block 12, a variable diameter positioning jig 11 is arranged on one side of the mounting block 12, and a jacking assembly is arranged on the other symmetrical side thereof, a slider 18 is arranged at the bottom of the mounting block 12, a slide rail 17 is arranged on the mounting frame B3, and a slider 18 is arranged on the slider 18.

[0047] The jacking assembly includes a fixed seat 16, which is set on the mounting frame B3. A cylinder B15 is set on the fixed seat 16. The piston of the cylinder B15 is provided with a push rod 14. Two retaining rings are provided on the push rod 14. A connecting plate 13 is provided on the other side of the mounting block 12. The two retaining rings are clamped in the arc groove of the connecting block.

[0048] A cylinder valve B20 is provided on the base 1, and the cylinder B15 is controlled by the cylinder valve B20.

[0049] When the reducer is placed in the reducer positioning jig 11, the cylinder B15 is started. The piston of the cylinder B15 pushes the retaining ring on the push rod 14 to drive the connecting plate 13 to move, thereby pushing the mounting block 12 to move along the slide rail 17 through the slider 18, and the reducer positioning jig 11 approaches the filter 10.

[0050] In the above embodiment, the manner in which the cylinder valve controls the cylinder belongs to conventional technology, and therefore, it will not be described in detail in this embodiment.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment based on the technical essence of the utility model shall still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. An arc welding fixture for a filter in an automobile exhaust system, characterized in that: It includes a pressing device and a jacking device, which are respectively arranged on the mounting frame A and the mounting frame B. The mounting frame B is also provided with a variable diameter positioning jig, which is arranged on the jacking device. The pressing device includes a pad, which is arranged on the mounting frame A and has a V-shaped groove on its upper surface. The mounting frame A is also provided with a stopper and a pressing assembly. The pressing assembly and the stopper are distributed in two directions of the pad and the two directions are perpendicular to each other with respect to the center point of the pad. The stopper is located on the horizontal axis of the V-shaped groove. The pressing assembly includes a cylinder A, which is arranged on a mounting frame A through a base. A horizontal pressing rod is provided on the piston of the cylinder A, a pressing block is provided at the free end of the pressing rod, and an arc-shaped notch is provided at the bottom of the pressing block; The lifting device includes a mounting block, a variable diameter positioning jig is set on one side of the mounting block, and a lifting assembly is set on the other side thereof. A slider is set at the bottom of the mounting block, and a slide rail is set on the mounting frame B, and the slider is set on the slide rail. The jacking assembly includes a fixed seat, which is arranged on the mounting frame B. The fixed seat is provided with a cylinder B. The piston of the cylinder B is provided with a push rod. The push rod is provided with two retaining rings. A connecting plate is provided on the other side of the mounting block. The two retaining rings are clamped in the arc groove of the connecting block.

2. The arc welding fixture for a filter in an automobile exhaust system according to claim 1, characterized in that: The pressing block is located directly above the cushion block and is connected to the pressing rod via a screw.

3. The arc welding fixture for a filter in an automobile exhaust system according to claim 2, characterized in that: A cylinder valve A is provided on the base, and cylinder A is controlled by the cylinder valve A.

4. The arc welding fixture for a filter in an automobile exhaust system according to claim 1, characterized in that: A cylinder valve B is provided on the base, and the cylinder B is controlled by the cylinder valve B.

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