A multi-station switching device for a welding gun of an automobile shock absorber support

Abstract

The utility model discloses a kind of welding gun multi-station switching device of automobile shock absorber support, it is related to automobile shock absorber support welding technical field, it includes manipulator, the output end of manipulator is equipped with mounting plate, L-shaped rotary plate is rotatably installed on mounting plate end upper end surface, rotary plate horizontal section and vertical section upper end surface are equipped with welding gun respectively, the rotation axis of rotary plate is downwards and is connected drive mechanism through mounting plate, drive mechanism contains cylinder and rack, rack engages with the gear at the bottom of rotation axis, mounting plate is cross-shaped, installation seat is equipped at rotation axis, installation seat is equipped with limit slot and L-shaped limit plate, welding gun is detachably fixed with rotary plate through fixed base with screw rod, and installation position can be fine-tuned.Gear is rotated by cylinder drive rack and rotation axis, so that rotary plate is rotated by 90 degrees, limit plate guarantees that welding gun is positioned accurately, realizes two welding guns alternate operation, and is adapted to the welding of shock absorber support steel material of different thickness.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber bracket welding technology, and in particular to a multi-station switching device for welding torches of automotive shock absorber brackets. Background Technology

[0002] Automotive shock absorber brackets often adopt a splicing structure with varying thicknesses, consisting of "thick steel for load bearing and thin steel for reinforcement". Specifically, the base is made of 4-8mm high-strength steel to bear the shock-absorbing impact load, while the reinforcing ribs and mounting ears are made of 1.5-3mm thin steel of the same material to assist in reinforcement and reduce the overall weight. The welding heat input requirements of steel of different thicknesses are different, which puts forward requirements for the precise adaptability of the welding process.

[0003] Currently, the main problem with welding such uneven thickness joints is the frequent parameter adjustments required for a single welding torch, leading to unstable welding quality. Using a single welding torch for all welding operations necessitates frequent adjustments to parameters such as welding current, voltage, and wire feed speed to adapt to different steel thicknesses. For example, thick steel requires a "high heat input" to ensure penetration, while thin steel requires a "low heat input" to prevent burn-through. Frequent parameter switching easily results in poor arc stability, uneven weld formation, and defects such as incomplete fusion, porosity, and undercut. Utility Model Content

[0004] To address the aforementioned problems, the present invention aims to provide a multi-station switching device for welding torches of automotive shock absorber brackets, which solves the problem that the large difference in heat input requirements for welding thick and thin steel in shock absorber brackets, and the tendency for single welding torch parameter switching to cause thin steel to burn through and thick steel to not melt through, are issues.

[0005] The technical solution of this utility model is as follows: A multi-station switching device for welding torch of an automobile shock absorber bracket includes a robot arm. The output end of the robot arm is provided with a mounting plate extending along its axis. An L-shaped rotating plate is rotatably mounted on the upper end face of the mounting plate away from the output end of the robot arm. The horizontal and vertical sections of the rotating plate are integrally formed and have the same length. A rotating shaft is vertically fixed at the intersection of the horizontal and vertical sections. The rotating shaft passes downward through the mounting plate and is connected to the drive mechanism for transmission. Welding guns are detachably mounted on the upper end face of the horizontal section and the upper end face of the vertical section of the rotating plate beside the rotating shaft. The welding guns on the horizontal section of the rotating plate extend in the same direction as the horizontal section of the rotating plate, and the welding guns on the vertical section of the rotating plate extend in the same direction as the vertical section of the rotating plate. The welding heads of both welding guns are arranged to the outside away from the rotating shaft, and the length of both welding guns is greater than the length of the corresponding horizontal or vertical section of the rotating plate, so as to prevent the rotating plate from interfering with the welding guns during welding. The drive mechanism is located on the lower end face of the mounting plate between the rotating plate and the output end of the robot. The drive mechanism includes a cylinder, and the output end of the cylinder is provided with a rack. The rack meshes with a gear sleeved and fixed at the bottom end of the rotating shaft. The cylinder drives the rack to make linear motion, thereby driving the gear and the rotating shaft to rotate synchronously, realizing the rotation of the rotating plate and adapting to the alternating operation of two welding guns.

[0006] Furthermore, the mounting plate is generally cross-shaped, including a first plate extending coaxially with the output end of the robot arm, and a second plate fixed perpendicularly to the first plate, the second plate being located at the end of the first plate away from the output end of the robot arm; The length of the second plate on both sides of the first plate is greater than or equal to the length of the horizontal segment of the rotating plate. The sliding fit between the rotating plate and the second plate facilitates the second plate to provide auxiliary support for the rotating plate. A mounting hole is provided at the intersection of the first plate and the second plate, and the rotating plate is rotatably engaged with the mounting hole via a rotating shaft.

[0007] Furthermore, the end of the horizontal or vertical section of the rotating plate away from the rotating shaft extends to the outer side of the end of the first plate away from the output end of the robot arm. This can not only avoid collision and interference between the welding torch and the mounting plate during operation, but also reserve sufficient working space for the welding torch. An L-shaped wire guide plate is provided on the upper surface of the first plate located between the rotating plate and the output end of the robot arm. The horizontal section of the wire guide plate is fixedly connected to the upper surface of the first plate, and a wire guide hole is opened on the vertical section of the wire guide plate.

[0008] Furthermore, the cylinders are arranged at intervals below the first plate along the extension direction of the first plate; the cylinders are fixedly connected to the lower end face of the mounting plate through a connecting plate, and the cylinders are located between the rotating plate and the output end of the robot arm.

[0009] Furthermore, a mounting seat is provided on the lower end face of the intersection of the first plate and the second plate. The rotating shaft passes through the mounting plate and the mounting seat in sequence downwards, and the gear is fixedly sleeved on the outer periphery of the rotating shaft below the mounting seat. A sliding groove adapted to the rack is opened on the mounting seat. The rack is slidably embedded in the sliding groove and meshes with the gear. The end of the rack near the output end of the robot is fixedly connected to the output end of the cylinder.

[0010] Furthermore, a limiting groove is formed on the side wall of the mounting base near the gear. The extending direction of the limiting groove is consistent with the extending direction of the first plate. An L-shaped limiting plate is sleeved on the outer periphery of the rotating shaft inside the limiting groove. In the initial state, one side of the limiting plate is in contact with the inner side wall of one end of the limiting groove. When the rotating plate rotates 90°, the other side of the limiting plate is tightly in contact with the inner side wall of the other end of the limiting groove to restrict the rotating plate from continuing to rotate.

[0011] Furthermore, a set of welding torch mounting holes is provided on both the horizontal and vertical sections of the rotating plate. Each set of welding torch mounting holes is a through hole that is spaced apart along the extension direction of the corresponding horizontal or vertical section, and the inner wall of the through hole is threaded. A block-shaped fixing seat is tightly fitted around the outer periphery of the welding torch. A threaded hole corresponding to the welding torch mounting hole is provided through the fixing seat. A screw is threaded through the threaded hole and screwed into the thread of the corresponding welding torch mounting hole. The installation position of the welding torch can be finely adjusted by changing the mounting hole that matches the screw.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model is equipped with dual welding guns to adapt to different welding requirements of steel with different thicknesses. With the help of a cylinder-driven rack and pinion transmission structure, it can achieve 90-degree rapid switching. There is no need to frequently adjust welding current, voltage and other parameters, avoiding arc instability and weld defects caused by parameter switching, and ensuring the penetration of thick steel and the integrity of thin steel.

[0013] 2. This utility model ensures that one of the welding torches is precisely aligned with the axis of the robot arm output shaft after switching by using the limiting groove on the mounting base and the limiting plate linked to the rotating shaft; the second plate of the cross-shaped mounting plate maintains a clearance sliding fit with the rotating plate, providing auxiliary support for the rotating plate, reducing shaking during rotation and welding, and further ensuring the consistency of weld formation.

[0014] 3. This utility model uses the welding gun mounting holes spaced apart on the rotating plate to cooperate with the fixed base, which allows for fine adjustment of the welding gun extension length and installation position, adapting to the welding requirements of different specifications of shock absorber brackets; the welding gun adopts a detachable installation method, which makes it easy to replace different types of welding guns according to changes in welding process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a top-view three-dimensional structural diagram of the present invention (without a robotic arm).

[0017] Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention (without robotic arms).

[0018] Figure 4 This is a schematic diagram of the rotating plate and drive mechanism of this utility model.

[0019] Figure 5 This is a schematic diagram of the rotating plate structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Robotic arm; 2. Mounting plate; 2-1. First plate; 2-2. Second plate; 3. Rotating plate; 3-1. Through hole; 4. Rotating shaft; 5. Drive mechanism; 5-1. Cylinder; 5-2. Rack; 5-3. Mounting base; 5-3.1. Limiting through groove; 5-3.2. Limiting plate; 5-4. Gear; 6. Welding torch; 7. Wire guide plate; 8. Fixed base. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figure 1-5 As shown, a multi-station switching device for welding torches of an automotive shock absorber bracket includes a robotic arm 1. The output end of the robotic arm 1 has a mounting plate 2 extending along its axis. An L-shaped rotating plate 3 is rotatably mounted on the upper surface of the end of the mounting plate 2 away from the output end of the robotic arm 1. The horizontal and vertical sections of the rotating plate 3 are integrally formed and have the same length. A rotating shaft 4 is vertically fixed at the intersection of the horizontal and vertical sections. The rotating shaft 4 passes downward through the mounting plate 2 and is connected to a drive mechanism 5. Welding torches 6 are detachably mounted on the upper surfaces of the horizontal and vertical sections of the rotating plate 3 beside the rotating shaft 4. The welding torches 6 on the horizontal section of the rotating plate 3 extend in the same direction as the horizontal section of the rotating plate 3, and the welding torches 6 on the vertical section of the rotating plate 3 extend in the same direction as the horizontal section of the rotating plate 3. The vertical sections extend in the same direction, and the welding heads of both welding torches 6 are arranged outwards away from the rotating shaft 4. The length of both welding torches 6 is greater than the length of the corresponding horizontal or vertical section of the rotating plate 3 to prevent the rotating plate 3 from interfering with the welding torches 6 during welding. The drive mechanism 5 is located on the lower end face of the mounting plate 2 between the rotating plate 3 and the output end of the robot arm 1. The drive mechanism 5 includes a cylinder 5-1, and the output end of the cylinder 5-1 is provided with a rack 5-2. The rack 5-2 meshes with the gear 5-4 sleeved and fixed at the bottom end of the rotating shaft 4. The cylinder 5-1 drives the rack 5-2 to make linear motion, thereby driving the gear 5-4 to rotate synchronously with the rotating shaft 4, realizing the rotation of the rotating plate 3 and adapting to the alternating operation of the two welding torches 6.

[0023] Furthermore, the mounting plate 2 is cross-shaped, including a first plate 2-1 extending coaxially with the output end of the robot 1, and a second plate 2-2 fixedly connected perpendicularly to the first plate 2-1. The second plate 2-2 is located at the end of the first plate 2-1 away from the output end of the robot 1. The length of the second plate 2-2 on both sides of the first plate 2-1 is greater than or equal to the length of the horizontal segment of the rotating plate 3. The rotating plate 3 and the second plate 2-2 are slidably fitted with a gap to facilitate the second plate 2-2 to provide auxiliary support for the rotating plate 3. The gap is 0.1-0.3mm. A mounting hole is provided at the intersection of the first plate 2-1 and the second plate 2-2. The rotating plate 3 is rotatably fitted with the mounting hole through the rotating shaft 4.

[0024] Furthermore, the horizontal or vertical section of the rotating plate 3 extends away from the rotating shaft 4 to the outer end of the first plate 2-1 away from the output end of the robot arm 1. This can both prevent the welding torch 6 from colliding and interfering with the mounting plate 2 during operation and reserve sufficient working space for the welding torch 6. An L-shaped wire guide plate 7 is provided on the upper surface of the first plate 2-1 located between the rotating plate 3 and the output end of the robot arm 1. The horizontal section of the wire guide plate 7 is fixedly connected to the upper surface of the first plate 2-1, and a wire guide hole is opened on the vertical section of the wire guide plate 7.

[0025] Furthermore, cylinders 5-1 are arranged at intervals below the first plate 2-1 along the extension direction of the first plate 2-1; cylinders 5-1 are fixedly connected to the lower end face of the mounting plate 2 through a connecting plate, and cylinders 5-1 are located between the rotating plate 3 and the output end of the robot arm 1.

[0026] Furthermore, a mounting base 5-3 is provided on the lower end face of the intersection of the first plate 2-1 and the second plate 2-2. The rotating shaft 4 passes downward through the mounting plate 2 and the mounting base 5-3 in sequence, and a gear 5-4 is fixedly sleeved on the outer periphery of the rotating shaft 4 below the mounting base 5-3. A sliding groove adapted to the rack 5-2 is opened on the mounting base 5-3. The rack 5-2 is slidably embedded in the sliding groove and meshes with the gear 5-4. The end of the rack 5-2 near the output end of the robot arm 1 is fixedly connected to the output end of the cylinder 5-1.

[0027] Furthermore, a limiting groove 5-3.1 is provided on the side wall of the mounting base 5-3 near the gear 5-4. The extending direction of the limiting groove 5-3.1 is consistent with the extending direction of the first plate 2-1. An L-shaped limiting plate 5-3.2 is sleeved on the outer periphery of the rotating shaft 4 inside the limiting groove 5-3.1. In the initial state, one side of the limiting plate 5-3.2 is in contact with the inner side wall of one end of the limiting groove 5-3.1. When the rotating plate 3 rotates 90°, the other side of the limiting plate 5-3.2 is tightly in contact with the inner side wall of the other end of the limiting groove 5-3.1 to restrict the rotating plate 3 from continuing to rotate.

[0028] Furthermore, a set of welding gun mounting holes is provided on both the horizontal and vertical sections of the rotating plate 3. Each set of welding gun mounting holes is a through hole 3-1 that is spaced apart along the extension direction of the corresponding horizontal or vertical section. The inner wall of the through hole 3-1 is provided with threads. A block-shaped fixing seat 8 is tightly fitted on the outer periphery of the welding gun 6. A threaded hole corresponding to the welding gun mounting hole is provided through the fixing seat 8. A screw is threaded through the threaded hole and screwed into the thread of the corresponding welding gun mounting hole. The installation position of the welding gun 6 can be finely adjusted by changing the mounting hole that matches the screw.

[0029] Working principle of this utility model: 1. Welding torch installation: According to the required length of the welding torch 6 extending from the rotating plate 3, move the fixing seat 8 to the corresponding through hole 3-1 on the horizontal or vertical section of the rotating plate 3, screw the screw from the threaded hole into the through hole 3-1 and lock it to fix the welding torch 6 and the rotating plate 3.

[0030] 2. Initial position: One side of the L-shaped limiting plate 5-3.2 is attached to the inner side wall of one end of the limiting through groove 5-3.1, and the rotating plate 3 is fixed; one welding gun 6 is aligned with the axis of the output end of the robot arm 1, and the welding head extends out of the first plate 2-1; the other welding gun 6 is arranged perpendicular to the first plate 2-1, located on the upper surface of the left or right side of the first plate 2-1. The two welding guns 6 are arranged at 90° orthogonal, which can reduce the welding slag and welding spatter generated when the working welding gun 6 aligned with the axis of the output end of the robot arm 1 is working, and reduce the adhesion contamination and high temperature damage to the other idle welding gun 6.

[0031] 3. Welding torch switching: When a torch needs to be changed, cylinder 5-1 pushes rack 5-2 to move linearly along the sliding groove. Rack 5-2 meshes with gear 5-4 to drive shaft 4 to rotate, which in turn drives L-shaped rotating plate 3 to rotate synchronously. When shaft 4 rotates, limiting plate 5-3.2 rotates with it in limiting groove 5-3.1. After rotating 90°, the other side of limiting plate 5-3.2 fits against the inner wall of the other end of limiting groove 5-3.1 to restrict rotation, ensuring that welding torch 6 and robot arm 1 are precisely aligned after switching.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-station switching device for welding torches of automotive shock absorber brackets, comprising a robotic arm, characterized in that: The output end of the robot arm is provided with a mounting plate extending along its axis. An L-shaped rotating plate is rotatably mounted on the upper end face of the end of the mounting plate away from the output end of the robot arm. The horizontal and vertical sections of the rotating plate are of the same length and a rotating shaft is provided at their intersection. The rotating shaft passes downward through the mounting plate and is connected to a drive mechanism. Welding guns are respectively installed on the upper end face of the horizontal section and the upper end face of the vertical section of the rotating plate beside the rotating shaft. The welding gun on the horizontal section of the rotating plate extends in the same direction as the horizontal section of the rotating plate, and the welding gun on the vertical section of the rotating plate extends in the same direction as the vertical section of the rotating plate. The welding heads of the two welding guns are arranged away from the rotating shaft, and the length of the two welding guns is greater than the length of the corresponding horizontal or vertical section of the rotating plate. In the working state, the extension direction of one of the welding guns is consistent with the axis of the output end of the robot. The drive mechanism is located on the lower end face of the mounting plate between the rotating plate and the output end of the robot. The drive mechanism includes a cylinder, and the output end of the cylinder is provided with a rack. The rack meshes with a gear sleeved and fixed on the rotating shaft.

2. The multi-station switching device for welding torches of the automotive shock absorber bracket according to claim 1, characterized in that: The mounting plate is cross-shaped in general, including a first plate extending coaxially with the output end of the robot arm, and a second plate fixed perpendicularly to the first plate, with the second plate located at the end of the first plate away from the output end of the robot arm; The length of the second plate on both sides of the first plate is greater than or equal to the length of the horizontal segment of the rotating plate; A mounting hole is provided at the intersection of the first plate and the second plate, and the rotating plate is rotatably engaged with the mounting hole via a rotating shaft.

3. The multi-station switching device for welding torches of the automotive shock absorber bracket according to claim 2, characterized in that: The horizontal or vertical section of the rotating plate extends from the end away from the rotating shaft to the outer side of the end of the first plate away from the output end of the robot arm.

4. The multi-station switching device for welding torches of the automotive shock absorber bracket according to claim 2, characterized in that: The cylinders are arranged at intervals below the first plate along the extension direction of the first plate; the cylinders are fixedly connected to the lower end face of the mounting plate through a connecting plate, and the cylinders are located between the rotating plate and the output end of the robot.

5. The multi-station switching device for welding torches of the automotive shock absorber bracket according to claim 4, characterized in that: A mounting base is provided on the lower end face of the intersection of the first plate and the second plate. The rotating shaft passes through the mounting plate and the mounting base in sequence downwards, and the gear is fixedly sleeved on the outer periphery of the rotating shaft below the mounting base. A sliding groove adapted to the rack is opened on the mounting base. The rack is slidably embedded in the sliding groove and meshes with the gear. The end of the rack near the output end of the robot is fixedly connected to the output end of the cylinder.

6. The multi-station switching device for welding torches of the automotive shock absorber bracket according to claim 5, characterized in that: A limiting groove is formed on the side wall of the mounting base near the gear. The extending direction of the limiting groove is consistent with the extending direction of the first plate. An L-shaped limiting plate is fitted around the outer periphery of the rotating shaft inside the limiting groove. In the initial state, one side of the limiting plate is in contact with the inner side wall of one end of the limiting groove. When the rotating plate rotates 90°, the other side of the limiting plate is tightly in contact with the inner side wall of the other end of the limiting groove to restrict the rotating plate from continuing to rotate.

7. The multi-station switching device for welding torches of an automotive shock absorber bracket according to claim 1, characterized in that: The rotating plate has a set of welding gun mounting holes on both the horizontal and vertical sections. Each set of welding gun mounting holes is a through hole that is spaced apart along the extension direction of the corresponding horizontal or vertical section. A block-shaped fixing seat is tightly fitted around the outer periphery of the welding gun. A threaded hole corresponding to the welding gun mounting hole is opened through the fixing seat. A screw is threaded through the threaded hole and screwed into the thread of the corresponding welding gun mounting hole.

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