Arc welding clamp for main pipeline in automobile exhaust system

Abstract

The utility model discloses an arc welding clamp for a main pipeline in an automobile exhaust system, which belongs to the technical field of pipeline welding and is characterized in that an arc-shaped die and a jacking mechanism are respectively arranged on a mounting frame A and a mounting frame B, the main pipeline is arranged in the arc-shaped die, and a reducing component is aligned with a welding opening of the main pipeline through the jacking mechanism; and the mounting rack A and the mounting rack B are arranged on the base. According to the arc welding clamp, through the reasonable layout design of the structure, stable butt joint of the main pipeline 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] This utility model belongs to the field of pipeline welding technology, specifically an arc welding fixture for the main pipeline in an automotive exhaust system. Background Technology

[0002] A car exhaust system generally consists of an exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, muffler, and exhaust tailpipe. The primary function of a car exhaust system is to discharge the exhaust gases produced by the engine, while simultaneously reducing pollution and noise. Car exhaust systems are mainly used in light vehicles, minivans, buses, motorcycles, and other motor vehicles. Working principle: After the exhaust gases from the engine cylinders are discharged through the exhaust valves, they pass through the exhaust manifolds of each cylinder and converge into the main exhaust pipe. There, they are purified by the three-way catalytic converter and silenced by the muffler before being discharged outside the vehicle through the exhaust tailpipe.

[0003] A single exhaust system for a car consists of an exhaust manifold, front exhaust shroud, catalytic converter, exhaust temperature sensor, muffler, and rear exhaust pipe. The arc welding process for exhaust components requires consideration of the varying structural characteristics and welding requirements of different parts of the automotive exhaust system. Depending on the shape and welding characteristics of different types of workpieces, the process layout of the welding unit can take many forms. Based on the distance of the main functional modules from the engine, the exhaust system can also be divided into hot and cold ends. The hot end directly connects to the engine exhaust port and mainly includes the manifold, purifier, bellows, secondary purifier, and hook flanges, among other auxiliary components. Due to its compact location in the chassis, the shape of the components varies considerably, resulting in a complex weld distribution. Furthermore, because its primary function is to purify exhaust gases, the weld sealing requirements are high. The cold end connects to the hot end and mainly includes the mid-muffler, rear muffler, and hook flanges, among other auxiliary components. Cold end assemblies are typically longer, and the welds are mostly small-diameter circumferential welds. When the rear muffler enclosure is a welded structure, press welding is usually required, resulting in a larger weld volume.

[0004] Although existing technology can produce high-quality automotive exhaust pipes in a wide variety of models, significant differences in worker skill levels lead to quality issues such as loose joints, insufficient corrosion resistance, and limited pressure resistance. Particularly problematic is the welding of the main pipe to the reducing component, where the connection stability is low, resulting in an unsound weld and uneven welding quality. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an arc welding fixture for the main pipe of an automotive exhaust system. Through the reasonable design of the fixture tooling, the main pipe and the variable diameter component can be fixed together before welding.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An arc welding fixture for a filter in an automotive exhaust system includes an arc-shaped mold and a clamping mechanism. The arc-shaped mold and the clamping mechanism are respectively mounted on mounting bracket A and mounting bracket B. The main pipe is set inside the arc-shaped mold. The variable diameter component is aligned with the weld joint of the main pipe through the clamping mechanism. Mounting bracket A and mounting bracket B are both set on a base.

[0008] In some embodiments, the arc mold includes a fixed arc mold and a movable arc mold. The top sidewall of the fixed arc mold is connected to one sidewall of the movable arc mold via a hinge. The other sidewall of the movable arc mold is provided with a hanging ear. The sidewall of the mounting frame A is provided with a rotating handle. A hook is hinged to the rotating handle. When the arc mold is closed, the hook is hung on the hanging ear.

[0009] In some embodiments, a support is provided on the side wall of the mounting bracket A, one end of the rotating handle is hinged to the support, and the bottom of the hook is hinged to the wall of the rotating handle.

[0010] In some embodiments, an upward-opening handle is provided on the outer wall of the dynamic arc-shaped mold.

[0011] In some embodiments, the fixed arc-shaped membrane is mounted on a fixed seat on the mounting frame A.

[0012] In some embodiments, the clamping mechanism includes a clamping seat, which is connected to the tensioning assembly in sequence via a push rod and a connecting rod.

[0013] In some embodiments, the tensioning assembly includes an L-shaped mounting base disposed on the top of the mounting bracket B. The back of the clamping base is connected to one end of a push rod, and the other end of the push rod passes through the vertical wall of the L-shaped mounting base and is connected to one end of a connecting rod. The other end of the connecting rod is hinged to the tensioning handle.

[0014] In some embodiments, the L-shaped mounting base is provided with a hinge seat, which is hinged to one end of the movable piece, and its other end is hinged to one end of the V-shaped hinge piece. The other end of the V-shaped hinge piece is hinged to the other end of the connecting rod, and the tightening handle is hinged to the wall of the movable piece.

[0015] In some embodiments, a limiting disk is provided inside the clamping seat, and an inclined surface is provided on the outer wall of the limiting disk. The variable diameter component is located between the limiting disk and the inner wall of the clamping seat.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The arc welding fixture designed in this utility model, through its reasonable structural layout, can achieve stable connection between the main pipe and the variable diameter component. By changing the shape of mounting bracket A and mounting bracket B, the interface is positioned horizontally, which facilitates welding and improves welding quality.

[0018] 2. The arc-shaped mold designed in this utility model includes a fixed arc-shaped mold and a movable arc-shaped mold, which are connected by a rotating hinge. The main pipe can be placed into the arc-shaped mold for positioning, which can effectively fix the main pipe with a variable diameter, thereby avoiding axial rotation of the main pipe during welding and improving the welding effect.

[0019] 3. The clamping mechanism designed in this utility model includes a clamping seat and a tensioning assembly. The clamping seat is connected to the tensioning assembly through a top rod and a connecting rod. The tensioning assembly consists of an L-shaped mounting seat, a hinge seat, a movable piece, a V-shaped hinge piece, and a tensioning handle. The hinge seat, movable piece, V-shaped hinge piece, and tensioning handle form a linkage hinge mechanism. By pulling the tensioning handle, the connecting rod and the top rod can be moved, thereby realizing the horizontal movement of the clamping seat, that is, aligning the diameter-changing port of the variable diameter component with the welding port of the main pipe and fitting it tightly, which facilitates welding and ensures the continuity of welding.

[0020] 4. In this utility model, the clamping seat is also equipped with a limiting plate inside. The outer wall of the limiting plate is provided with an inclined surface to facilitate the installation of the diameter-changing component on the limiting plate and within the gap between the limiting plate and the clamping seat. The limiting plate and the inner wall of the clamping seat limit the diameter-changing component, preventing axial rotation of the component. When the handle is tightened, the diameter-changing port of the component closely fits the weld joint of the main pipe, preventing radial movement. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of an arc welding fixture for the main pipe of an automotive exhaust system in Example 1.

[0023] Figure 2 This is a front view of an arc welding fixture for the main pipe of an automotive exhaust system in Example 1.

[0024] Figure 3 This is a top view of an arc welding fixture for the main pipe of an automotive exhaust system in Example 1.

[0025] Figure 4 This is a perspective view of the movable arc-shaped tire mold in Example 2.

[0026] Figure 5 This is a perspective view of the fixed arc-shaped mold in Example 2.

[0027] Figure 6 This is a perspective view of the rotating handle in Example 2.

[0028] Figure 7 This is a perspective view of the clamping mechanism in Example 3.

[0029] Figure 8 This is a front view of the clamping mechanism in Example 3.

[0030] The components are as follows: 1. Base; 2. Mounting bracket B; 3. Mounting bracket A; 4. Arc mold; 401. Fixed arc mold; 402. Movable arc mold; 403. Upward-opening handle; 404. Hanging ear; 405. Hook; 406. Rotating handle; 5. Clamping seat; 501. Limiting plate; 6. Top rod; 7. Connecting rod; 8. Tensioning assembly; 801. L-shaped mounting seat; 802. Hinge seat; 803. Movable piece; 804. V-shaped hinge piece; 805. Tensioning handle; 9. Fixed seat. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] 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 merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Reference Figure 1-3 As shown, this embodiment provides an arc welding fixture for the main pipe of an automotive exhaust system, including an arc mold 4 and a clamping mechanism. The arc mold 4 and the clamping mechanism are respectively mounted on mounting bracket A3 and mounting bracket B2. The main pipe is placed inside the arc mold 4. The variable diameter component is aligned with the welding joint of the main pipe through the clamping mechanism. Mounting bracket A3 and mounting bracket B2 are both mounted on the base 1.

[0035] Specifically, the mounting bracket A3 is equipped with a fixing bracket, and the top of the fixing bracket is equipped with a V-groove, and the arc mold 4 is installed in the V-groove.

[0036] The clamping mechanism includes a clamping seat 5, which is connected to the tensioning assembly 8 in sequence via a push rod 6 and a connecting rod 7. The clamping seat 5 is essentially a diameter-changing positioning fixture. The diameter-changing component is clamped in the diameter-changing positioning fixture, which limits the diameter-changing component. The tensioning assembly 8 moves the diameter-changing positioning fixture toward the arc-shaped mold 4, thereby aligning the diameter-changing port of the diameter-changing component with the weld joint of the main pipe.

[0037] Example 2

[0038] This embodiment will provide a detailed description of the arc-shaped mold 4.

[0039] like Figure 4-6 As shown, the arc mold 4 includes a fixed arc mold 401 and a movable arc mold 402. The top side wall of the fixed arc mold is connected to one side wall of the movable arc mold via a hinge. The other side wall of the movable arc mold is provided with a hanging ear 404. The side wall of the mounting bracket A3 is provided with a rotating handle 406. A hook 405 is hinged to the rotating handle 406. When the arc mold 4 is closed, the hook 405 is hung on the hanging ear 404.

[0040] Specifically, a support is provided on the side wall of the mounting bracket, one end of the rotating handle 406 is hinged to the support, and the bottom of the hook 405 is hinged to the wall of the rotating handle 406.

[0041] In addition, a flip-up handle 403 is provided on the outer wall of the movable arc-shaped mold 402. When it is necessary to open the arc-shaped mold 4, pull up the rotating handle 406, the hook 405 disengages from the hanging ear 404, then pull up the flip-up handle 403 to open the movable arc-shaped mold 402, place the main pipe into the arc-shaped mold 4, then pull down the flip-up handle 403, the movable arc-shaped mold 402 closes with the fixed arc-shaped mold 401, pull up the rotating handle 406 to hook the hook onto the hanging ear 404, and then pull down the rotating handle 406 to limit the hook. Thus, the main pipe is fixed inside the arc-shaped mold 4.

[0042] The fixed arc-shaped membrane is fixed on the fixing seat 9 on the mounting bracket A3, and the above-mentioned fixing connection can be fixed with screws.

[0043] Example 3

[0044] This embodiment provides a detailed description of the clamping mechanism.

[0045] like Figure 7 , 8 As shown, the tensioning assembly 8 includes an L-shaped mounting base 801, the back of the clamping base 5 is connected to one end of the top rod 6, the other end of the top rod 6 passes through the vertical wall of the L-shaped mounting base 801 and is connected to one end of the connecting rod 7, and the other end of the connecting rod 7 is hinged to the tensioning handle 805.

[0046] Specifically, the L-shaped mounting base 801 is provided with a hinge base 802, which is hinged to one end of the movable piece 803, and its other end is hinged to one end of the V-shaped hinge piece 804. The other end of the V-shaped hinge piece 804 is hinged to the other end of the connecting rod 7, and the tensioning handle 805 is hinged to the wall of the movable piece 803.

[0047] The hinge seat 802 is fixed to the L-shaped mounting base 801 with screws at a position opposite to its vertical wall. The hinge seat 802 is provided with a vertical plate that supports the connecting rod 7. The connecting rod 7 passes through the vertical rod and can move left and right.

[0048] In this embodiment, a limiting disk 501 is provided inside the clamping seat 5. The outer wall of the limiting disk 501 is provided with an inclined surface that matches the tilt angle of the diameter-changing component. The fixed end of the diameter-changing component is located in the gap between the limiting disk 501 and the clamping seat 5. By utilizing the cooperation between the clamping seat 5 and the limiting disk 501, the diameter-changing component is effectively fixed, avoiding axial or radial displacement during the welding process.

[0049] When the reducing component is placed into the clamping seat 5, rotate the tightening handle 805 clockwise. This will cause the connecting rod 7 to move to the left through the linkage of the movable piece 803 and the V-shaped hinge piece 804, which in turn pushes the top rod 6 to move the clamping seat 5 to the left. This will align the reducing port of the reducing component with the weld joint of the main pipe. Without pulling the tightening handle 805, the weld joint of the main pipe will fit tightly with the reducing port of the reducing component, thus facilitating alignment and welding.

[0050] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A main pipe arc welding fixture for an automotive exhaust system, characterized in that, The arc-shaped mold and the clamping mechanism are respectively set on mounting bracket A and mounting bracket B. The main pipe is set inside the arc-shaped mold. The reducing component is aligned with the weld joint of the main pipe through the clamping mechanism. Mounting bracket A and mounting bracket B are both set on the base. The arc mold includes a fixed arc mold and a movable arc mold. The top side wall of the fixed arc mold is connected to one side wall of the movable arc mold via a hinge. The other side wall of the movable arc mold is provided with a hanging ear. The side wall of the mounting frame A is provided with a rotating handle. A hook is hinged to the rotating handle. When the arc mold is closed, the hook is hung on the hanging ear. The clamping mechanism includes a clamping seat, which is connected to the tensioning assembly in sequence via a push rod and a connecting rod; The tensioning assembly includes an L-shaped mounting base, which is located on the top of the mounting bracket B. The back of the clamping base is connected to one end of the push rod, and the other end of the push rod passes through the vertical wall of the L-shaped mounting base and is connected to one end of the connecting rod. The other end of the connecting rod is hinged to the tensioning handle.

2. The arc welding fixture for the main pipe of an automotive exhaust system according to claim 1, characterized in that, A support is provided on the side wall of mounting bracket A. One end of the rotating handle is hinged to the support, and the bottom of the hook is hinged to the wall of the rotating handle.

3. The arc welding fixture for the main pipe of an automotive exhaust system according to claim 2, characterized in that, The outer wall of the moving arc-shaped mold is equipped with an upward-opening handle.

4. The arc welding fixture for the main pipe of an automotive exhaust system according to claim 3, characterized in that, The fixed arc-shaped tire membrane is mounted on the fixed seat on the mounting frame A.

5. The arc welding fixture for the main pipe of an automotive exhaust system according to claim 1, characterized in that, The L-shaped mounting base is equipped with a hinge seat, which is hinged to one end of the movable piece, and its other end is hinged to one end of the V-shaped hinge piece. The other end of the V-shaped hinge piece is hinged to the other end of the connecting rod, and the tightening handle is hinged to the wall of the movable piece.

6. The arc welding fixture for the main pipe of an automotive exhaust system according to claim 5, characterized in that, The clamping seat is equipped with a limiting plate inside, and the outer wall of the limiting plate is provided with an inclined surface. The variable diameter component is located between the limiting plate and the inner wall of the clamping seat.

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