Assembly welding device for maintenance truck brake pipe joint body

Abstract

The utility model discloses a maintenance truck brake pipe joint body assembly welding device which comprises a workbench, a rotating disc, a three-jaw chuck, a limiting support and an electric welding assembly, a positioning column is arranged in the center of the top face of the rotating disc, a joint body and a steel pipe are both inserted into the positioning column, the three-jaw chuck is installed in the center of the rotating disc and clamps the joint body from the three sides in the circumferential direction, and the electric welding assembly is installed on the rotating disc. The limiting support comprises a supporting vertical rod, a transverse connecting rod and a limiting frame, the transverse connecting rod is installed on the supporting vertical rod in a vertically adjustable mode, the limiting frame is located at the outer end of the transverse connecting rod, the limiting frame can annularly frame a pipe body of the steel pipe, and therefore the steel pipe is in a vertical state, and the electric welding assembly comprises an electric welding machine, a grounding wire copper block assembly and welding tongs which are connected with one another. The ground wire copper block welding machine has the advantages that the continuity of a welding seam is guaranteed, the working efficiency is improved, the working intensity is reduced, the welding quality is guaranteed, the structures are linked with one another, the design is ingenious, and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of truck maintenance, and in particular relates to a welding device for a brake pipe joint assembly of a truck maintenance. Background Art

[0002] At present, the main faults of railway freight car brake systems are brake pipe system faults and malfunction of brake accessories such as 120 valves and gate regulators. Among them, brake pipe cracking is the most prominent fault of brake pipe system. The main reasons for brake pipe cracking are poor welding quality and verticality deviation (no more than 0.5mm within 100mm) between the steel pipe and the joint body. When there is a certain stress in the brake pipe assembly, the stress is concentrated at the weld after the vehicle runs and vibrates, causing the brake pipe to crack. At the same time, since there are two types of brake pipes for overhauling freight cars, carbon steel pipes and stainless steel pipes, when adding new pipes after the brake pipes are scrapped, the operator needs to constantly switch different types of welding rods according to the different materials of the brake pipes and perform circular welding. The operation is extremely inconvenient and the welding quality is difficult to guarantee.

[0003] The welding of the brake pipes for trucks is done manually on the welding platform. The joint body is placed on the positioning column of the platform, and the steel pipe is inserted into the positioning column and falls into the ring groove of the joint body. The operator holds the steel pipe and visually checks the verticality of the steel pipe and the joint body. At the same time, different welding rods are selected according to the materials of the steel pipe and the joint body. Circular welding is performed by hand arc welding. Welding rods of different materials are frequently replaced. At the same time, the steel pipe needs to be manually rotated to complete the circumferential seam welding, which is troublesome to operate and has low work efficiency. The complete set of circumferential seam welding machines requires the use of coiled welding wires. Welding steel pipes of different materials requires frequent replacement of the entire coil of welding wires, which is complicated to operate and labor-intensive.

[0004] Due to the lack of a dedicated positioning device in the assembly welding mode of the truck brake pipe during maintenance, it is difficult to ensure the verticality requirements of the welding. At the same time, since the steel pipe and the joint body do not move during welding, it is difficult for the operator to weld the back side of the steel pipe when performing circular welding with a handheld welding gun, which is prone to discontinuous welds and leaks. Utility Model Content

[0005] The utility model aims to provide a welding device for inspecting and repairing truck brake pipe joint bodies, which has low welding difficulty and high welding quality, and solves the problem that the welding of the back side of the steel pipe is difficult and the weld is prone to discontinuous welding when the operator relies on a handheld welding gun to perform circumferential welding because the steel pipe and the joint body are immovable.

[0006] To this end, the technical solution adopted by the present utility model is as follows: An overhaul truck brake pipe joint body butt welding device, which includes a workbench, a rotating disk installed on the workbench, a three-jaw chuck for clamping the joint body, a limiting bracket for enclosing the pipe body of the steel pipe, and an electric welding assembly for welding the steel pipe. The rotating disk is installed on the edge and its edge can expose the workbench. A positioning column is provided in the center of the top surface of the rotating disk, and a driving motor is equipped at the bottom. The joint body and the steel pipe are both inserted into the positioning column, and the bottom of the steel pipe falls into the annular groove of the joint body. The three-jaw chuck is installed in the center of the rotating disk and clamps the joint body circumferentially from three sides. The limiting bracket includes a supporting vertical rod, a horizontal connecting rod that can be adjusted up and down on the supporting vertical rod, and a limiting frame at the outer end of the horizontal connecting rod. The limiting frame can circumferentially enclose the pipe body of the steel pipe, so that the steel pipe is in a vertical state. The electric welding assembly includes an electric welding machine, a grounding wire copper block assembly and a welding torch that are connected to each other. The grounding wire copper block assembly is installed on the side wall of the workbench. The welding torch is used for clamping the welding rod for welding. The top surface of the grounding wire copper block assembly contacts the part of the rotating disk that exposes the workbench. When the driving motor drives the rotating disk to drive the steel pipe to rotate uniformly, the welding torch clamping the welding electrode fits the connection between the steel pipe and the joint body to achieve circumferential welding.

[0007] As a preference of the above solution, the grounding wire copper block assembly includes an "L"-shaped mounting seat installed on the side wall of the workbench and grounded, a main metal block mounting frame installed on the "L"-shaped mounting seat, conductive metal blocks and springs that are both located on the main metal block mounting frame. The top of the spring abuts against the bottom surface of the conductive metal block, so that the top surface of the conductive metal block can closely adhere to the part of the rotating disk that exposes the workbench. The structure is reasonably designed, ensuring that the rotating rotating disk can always be grounded through the conductive metal block, and the grounding wire copper block assembly does not need to rotate with the rotating disk, thus avoiding the problem of wire harness entanglement.

[0008] Further preferably, the conductive metal block is made of a copper block, which has a low cost. An installation groove for installing the conductive metal block is provided in the upper part of the main metal block mounting frame, and a through hole for the spring to pass through is provided at the bottom of the installation groove. The structure is reasonably designed.

[0009] Further preferably, the limiting frame includes an adjusting bolt, limiting plates and movable vertical rods that sandwich the pipe body of the steel pipe from left and right. The limiting plates are provided with arc-shaped grooves that fit the steel pipe. The adjusting bolt is connected to the outer end of the movable vertical rod and horizontally screwed into the limiting plate, so as to enclose the pipe body of the steel pipe in combination with the horizontal connecting rod. The structure is reasonably designed and can be flexibly adjusted according to the diameter of the steel pipe to ensure that the steel pipe remains in a vertical state.

[0010] Further preferably, the part of the rotating disk that exposes the workbench is less than half of the bottom surface area of the rotating disk, avoiding unstable installation of the rotating disk affected by gravity. The design is reasonable.

[0011] The beneficial effects of the present utility model:

[0012] (1) Compared with the situation where the steel pipe and the joint body are stationary and the operator relies on a hand-held welding torch for circumferential welding, this solution uses a welding device for assembling and welding the brake pipe joint body of a maintenance truck. The three-jaw chuck and the limit bracket are used to fix the joint body and the steel pipe respectively, keeping the steel pipe in a vertical state, ensuring good welding quality between the joint body and the steel pipe. The rotating disk drives the joint body and the steel pipe to rotate. Therefore, the operator can complete the welding work without rotating the hand-held welding pliers, ensuring the continuity of the weld seam, improving the operation efficiency, reducing the working intensity, and ensuring the welding quality.

[0013] (2) Since welding is generally carried out using welding wires, this solution uses a welding plier to hold the welding electrode for welding, reducing the time cost caused by the inconvenience of replacing the welding wire. The replacement of the welding electrode is simple and fast, and the selection is reasonable. A positioning column is centrally provided on the top surface of the rotating disk, and a driving motor is equipped at the bottom. The joint body and the steel pipe are both inserted into the positioning column, and the bottom of the steel pipe falls into the annular groove of the joint body. The three-jaw chuck is centrally installed on the rotating disk and circumferentially clamps the joint body from three directions, ensuring that the joint body is centrally placed. Therefore, the steel pipe inserted into the joint body is also centrally placed, so that both of them can achieve self-rotation when the rotating disk rotates, and the structure is interlocked, with a clever design.

[0014] In summary, the utility model has the advantages of ensuring the continuity of the weld seam, improving the operation efficiency, reducing the working intensity, ensuring the welding quality, having an interlocked structure, and a clever design. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the utility model. Detailed Embodiment

[0016] The following further illustrates the utility model through embodiments in combination with the drawings:

[0017] As Figure 1 shown, a welding device for assembling and welding the brake pipe joint body of a maintenance truck is composed of a workbench 1, a rotating disk 2 installed on the workbench 1, a three-jaw chuck 3 for clamping the joint body 7, a limit bracket 4 for enclosing the body of the steel pipe 6, and an electric welding assembly 5 for welding the steel pipe 6.

[0018] The rotating disk 2 is installed at the edge and its edge can be exposed from the workbench 1.

[0019] The part of the rotating disk 2 exposed from the workbench 1 is less than half of the bottom area of the rotating disk 2.

[0020] A positioning column is centrally provided on the top surface of the rotating disk 2, and a driving motor 21 is equipped at the bottom.

[0021] The joint body 7 and the steel pipe 6 are both inserted into the positioning column, and the bottom of the steel pipe 6 falls into the annular groove of the joint body 7.

[0022] The three-jaw chuck 3 is centrally installed on the rotating disk 2 and circumferentially clamps the joint body 7 from three directions.

[0023] The limit support 4 is composed of a supporting vertical rod 41, a transverse connecting rod 42 that can be adjusted up and down and installed on the supporting vertical rod 41, and a limit frame 43 located at the outer end of the transverse connecting rod 42.

[0024] The limit frame 43 can circumferentially enclose the body of the steel pipe 6, so that the steel pipe 6 is in a vertical state.

[0025] The limit frame 43 is composed of an adjusting bolt 433, a limit plate 431 that clamps the body of the steel pipe 6 from left and right, and a movable vertical rod 432.

[0026] The limit plate 431 is provided with an arc groove that fits the steel pipe 6. The adjusting bolt 433 is connected to the outer end of the movable vertical rod 432 and horizontally screwed into the limit plate 431, so as to enclose the body of the steel pipe 6 in combination with the transverse connecting rod 42.

[0027] The electric welding assembly 5 is composed of a welding machine 51, a grounding wire copper block assembly 52 and a welding clamp 53 that are connected to each other. The grounding wire copper block assembly 52 is installed on the side wall of the workbench 1, and the welding clamp 53 is used to hold the welding rod for welding.

[0028] The top surface of the grounding wire copper block assembly 52 contacts the part of the rotating disk 2 that exposes the workbench 1.

[0029] The grounding wire copper block assembly 52 is composed of an "L"-shaped mounting seat 521 that is installed on the side wall of the workbench 1 and grounded, a metal block placement main frame 522 installed on the "L"-shaped mounting seat 521, and conductive metal blocks and springs 523 that are both located on the metal block placement main frame 522.

[0030] The top of the spring 523 abuts against the bottom surface of the conductive metal block, so that the top surface of the conductive metal block can closely adhere to the part of the rotating disk 2 that exposes the workbench 1.

[0031] The conductive metal block is preferably made of a copper block.

[0032] The upper part of the metal block placement main frame 522 is provided with a placement groove 524 for placing the conductive metal block.

[0033] The bottom of the placement groove 524 is provided with a through hole for the spring 523 to pass through.

[0034] When the driving motor 21 drives the rotating disk 2 to drive the steel pipe 6 to rotate uniformly, the welding clamp 53 that holds the welding electrode fits the connection part of the steel pipe 6 and the joint body 7 to realize circumferential welding.

[0035] First, insert the joint body 7 into the positioning column on the rotating disk 2 and fall into the three-jaw chuck 3, and adjust the three jaws to clamp the joint body 7 to ensure the central positioning of the joint body 7.

[0036] The steel pipe 6 to be welded is inserted into the positioning column and lands in the annular groove of the joint body 7. By adjusting the length of the adjusting bolt 433 screwed into the limit plate 431, the steel pipe 6 is positioned to a vertical state. At the same time, a level can be used to assist in detecting the perpendicularity of the steel pipe 6.

[0037] The driving motor 21 is turned on to drive the rotating disk 2. At this time, the joint body 7 and the steel pipe 6 rotate at a constant speed simultaneously. The operator selects a suitable welding electrode according to the materials of the steel pipe 6 and the joint body 7 and welds by manual arc welding.

[0038] During welding, the operator confirms that the conductive metal block is in contact with the rotating disk 2, holds the welding clamp 53 to clamp the welding electrode, and after arc ignition, keeps the welding electrode at a certain angle and position unchanged, and relies on the rotation of the joint body 7 and the steel pipe 6 to complete the welding of the entire circumferential weld.

Claims

1. A welding device for inspecting and repairing truck brake pipe joints, characterized in that: The invention comprises a workbench (1), a rotating disk (2) installed on the workbench (1), a three-jaw chuck (3) for clamping a joint body (7), a limiting bracket (4) for framing a steel pipe (6) and an electric welding assembly (5) for welding the steel pipe (6), wherein the rotating disk (2) is installed close to the edge and the edge can be exposed from the workbench (1), a positioning column is arranged in the center of the top surface of the rotating disk (2), and a driving motor (21) is arranged at the bottom, the joint body (7) and the steel pipe (6) are both inserted into the positioning column, and the bottom of the steel pipe (6) falls into the annular groove of the joint body (7), the three-jaw chuck (3) is installed in the center of the rotating disk (2) and clamps the joint body (7) in an annular direction from three directions, and the limiting bracket (4) comprises a supporting vertical rod (41), a transverse connecting rod (41) which can be adjusted up and down and is arranged on the supporting vertical rod (41) The invention relates to a steel pipe (6) having a plurality of connecting rods (42) and a limit frame (43) located at the outer end of the transverse connecting rod (42), wherein the limit frame (43) can frame the steel pipe (6) in an annular direction, thereby placing the steel pipe (6) in a vertical state. The electric welding assembly (5) comprises an electric welding machine (51), a grounding copper block assembly (52) and a welding clamp (53) which are connected to each other. The grounding copper block assembly (52) is installed on the side wall of the workbench (1). The welding clamp (53) is used to clamp the welding rod for welding. The top surface of the grounding copper block assembly (52) contacts the part of the rotating disk (2) exposed from the workbench (1). When the driving motor (21) drives the rotating disk (2) to drive the steel pipe (6) to rotate at a uniform speed, the welding clamp (53) clamping the welding rod fits the connection between the steel pipe (6) and the joint body (7) to realize annular welding.

2. The welding device for the brake pipe joint assembly of a truck for maintenance according to claim 1 is characterized in that: The grounding copper block assembly (52) comprises an "L"-shaped mounting seat (521) mounted on the side wall of the workbench (1) and connected to the grounding wire, a metal block placement main frame (522) mounted on the "L"-shaped mounting seat (521), and a conductive metal block and a spring (523) both located on the metal block placement main frame (522), wherein the top of the spring (523) abuts against the bottom surface of the conductive metal block, so that the top surface of the conductive metal block can be closely attached to the portion of the rotating disk (2) exposed from the workbench (1).

3. The welding device for the brake pipe joint assembly of a truck for maintenance according to claim 2 is characterized in that: The conductive metal block is made of copper. The upper part of the metal block placement main frame (522) is provided with a placement groove (524) for placing the conductive metal block. The bottom of the placement groove (524) is provided with a through hole for the spring (523) to pass through.

4. The welding device for repairing truck brake pipe joints according to claim 1, characterized in that: The limit frame (43) comprises an adjusting bolt (433), a limit plate (431) for clamping the steel pipe (6) body on the left and right, and a movable longitudinal rod (432); the limit plate (431) is provided with an arc groove that fits the steel pipe (6); the adjusting bolt (433) is connected to the outer end of the movable longitudinal rod (432) and is screwed into the limit plate (431) horizontally, thereby framing the steel pipe (6) body in combination with the transverse connecting rod (42).

5. The welding device for overhauling truck brake pipe joints according to claim 1, characterized in that: The portion of the rotating disk (2) exposed from the workbench (1) is less than half of the bottom area of ​​the rotating disk (2).

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