Special welding machine special for MIG welding of aluminum alloy transmission shaft

Abstract

A special welding machine special for MIG welding of an aluminum alloy transmission shaft comprises a controller and a machine base, an n-shaped support is arranged on the machine base, and the special welding machine is characterized in that a welding machine moving sliding rail is arranged in the support, a welding mechanism is connected to the welding machine moving sliding rail in a sliding mode, and a fixing clamp sliding rail is arranged on the end face of the machine base. A rotary clamp is installed at one end of the fixed clamp sliding rail, a movable clamp mechanism is installed at the other end of the fixed clamp sliding rail, and an included angle of 90 degrees is formed between the movable clamp mechanism and the fixed clamp sliding rail. The welding machine and the clamp are connected to the sliding rails in a sliding mode through the multiple sliding rails, the welding machine and the clamp are accurately positioned through the controller, the problems that existing equipment is low in loading and unloading efficiency and large in potential safety hazard are solved, and the efficient and reliable welding requirement of the aluminum alloy transmission shaft under the automobile lightweight background is met.

Description

Technical Field

[0001] This utility model relates to the field of drive shaft welding, specifically to a special welding machine for MIG welding of aluminum alloy drive shafts. Background Technology

[0002] In the automotive industry's move towards lightweighting, aluminum alloys, due to their low density and high specific strength, have become ideal lightweight materials for automotive driveshafts. However, their welding difficulty far exceeds that of traditional carbon steel. MIG welding, with its minimal filler material, achieves high-quality connections, combining the advantages of lower cost and easier maintenance that friction welding struggles to achieve, along with a unique permanent high-strength connection effect compared to mechanical nesting, making it the preferred process for connecting aluminum alloy driveshafts. Driveshaft structures typically include irregularly shaped components such as shaft tubes, flanges, and splines, with significant variations in their geometric dimensions and welding positions. Traditional general-purpose welding equipment suffers from poor fixture versatility, requiring frequent fixture changes for different driveshaft sizes, resulting in long changeover times and difficulty adapting to multi-variety, small-batch production models. Workpiece loading and unloading efficiency is low, with long single-piece loading and unloading times, making it difficult to match the cycle time requirements of automated production lines. Furthermore, operational safety is insufficient: the surface temperature of the welding torch assembly reaches hundreds of degrees Celsius after welding, and traditional equipment does not effectively isolate the loading / unloading area from the welding area, posing a risk of burns to workers who may accidentally touch high-temperature components when handling workpieces. Summary of the Invention

[0003] The purpose of this utility model is to overcome the defects and shortcomings of the existing technology and provide a special welding machine for MIG welding of aluminum alloy drive shafts that has a simple structure, high working efficiency and strong operational safety.

[0004] To achieve the above objectives, the technical solution of this utility model is: a special welding machine for MIG welding of aluminum alloy drive shafts, including a controller and a base, wherein a "∏"-shaped bracket is provided on the base, characterized in that: a welding machine moving slide rail is provided inside the bracket, a welding mechanism is slidably connected on the welding machine moving slide rail, a fixed clamp slide rail is provided on the end face of the base, a rotating clamp is installed at one end of the fixed clamp slide rail, and a moving clamp mechanism is installed at the other end of the fixed clamp slide rail, wherein the moving clamp mechanism forms a 90° angle with the fixed clamp slide rail.

[0005] The movable clamping mechanism includes a movable clamping platform and a movable clamp. The movable clamping platform is slidably connected to a fixed clamping slide rail. The movable clamping platform and the fixed clamping slide rail form a 90° angle. The movable clamping slide rail is provided on the end face of the movable clamping platform, and the movable clamp is slidably connected to the movable clamping slide rail.

[0006] The welding mechanism includes a welding robot and a welding torch located at the end of the welding robot, the welding robot being slidably connected to the welding machine's moving slide rail.

[0007] The rotary clamp is connected to the servo motor via a coupling.

[0008] This invention uses multiple sets of slide rails to allow the welding machine and fixture to slide and connect on the slide rails respectively. The controller accurately positions the welding machine and fixture, solving the problems of low loading and unloading efficiency and high safety hazards of existing equipment, and meeting the high-efficiency and reliable welding requirements of aluminum alloy drive shafts in the context of automotive lightweighting. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 (3D view).

[0010] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 (Main view).

[0011] In the diagram: 1. Base; 2. Bracket; 3. Welding machine moving slide rail; 4. Fixed clamp slide rail; 5. Rotary clamp; 6. Moving clamp table; 7. Moving clamp; 8. Moving clamp slide rail; 9. Welding robot; 10. Welding torch; 11. Servo motor. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] See Figures 1-2 A special welding machine for MIG welding of aluminum alloy drive shafts includes a controller and a base 1. The base 1 is provided with a "∏"-shaped bracket 2. The bracket 2 is provided with a welding machine moving slide rail 3. A welding mechanism is slidably connected to the welding machine moving slide rail 3. A fixed clamp slide rail 4 is provided on the end face of the base 1. A rotating clamp 5 is installed at one end of the fixed clamp slide rail 4. A moving clamp mechanism is installed at the other end of the fixed clamp slide rail 4. The moving clamp mechanism forms a 90° angle with the fixed clamp slide rail 4.

[0014] The movable clamping mechanism includes a movable clamping platform 6 and a movable clamp 7. The movable clamping platform 6 is slidably connected to the fixed clamping slide rail 4, and the movable clamping platform 6 and the fixed clamping slide rail 4 form a 90° angle. The movable clamping platform 6, which slides on the fixed clamping slide rail 4, is responsible for the displacement of the transmission shaft in the X-axis. A movable clamping slide rail 8 is provided on the end face of the movable clamping platform 6, and the movable clamp 7 is slidably connected to the movable clamping slide rail 8. The movable clamp 7, which slides on the movable clamping slide rail 8, is responsible for the displacement of the transmission shaft in the Y-axis.

[0015] The welding mechanism includes a welding robot 9 and a welding torch 10. The welding robot 9 is slidably connected to the welding machine's moving slide rail 3, and its lower end is connected to the welding torch. It is fixed by an adjustable robotic arm to adjust the welding posture. The welding torch 10 is suspended below the robot 9 and is connected to the welding power supply and shielding gas system via a cable. It outputs welding current and inert gas to perform MIG welding.

[0016] The rotary fixture 5 is connected to the servo motor 11 via a coupling. The servo motor 11 is electrically controlled to connect to the rotary fixture 5, precisely adjusting the rotation parameters, and working in coordination with the moving fixture table 6 and the welding system.

[0017] The movable fixture table 6 moves back and forth on the movable fixture slide rail 8 by a pneumatic mechanism. The movable fixture 7 and the welding robot 9 can be adjusted manually or driven by a servo motor + ball screw.

[0018] The controller transmits control signals to the servo motor 11, the moving fixture table 6, and the welding robot 9 via hardwired or bus connections. The servo motor 11 receives commands from the controller through a driver, achieving precise drive of the rotating fixture 5. Simultaneously, the feedback element built into the servo motor 11 sends status signals back to the controller, forming a closed-loop control. The drive mechanisms of components such as the moving fixture table 6, the welding robot 9, and the moving fixture 7 are connected to the controller's output module via cables or pneumatic circuits, allowing the controller to uniformly regulate their movement trajectory and rhythm.

[0019] The working process of this utility model is as follows: First, the workpiece is clamped and positioned. The operator places the drive shaft on the movable fixture table 6, and the movable fixture 7 quickly clamps both ends of the workpiece through a mechanical structure to achieve centering. The movable fixture table 7 slides along the movable fixture slide rail 8 to transport the workpiece to the welding station. The fixed fixture slide rail 4 is adjusted accordingly, and the control logic ensures accurate workpiece positioning, completing rapid clamping, reducing manual operation time, and improving loading and unloading efficiency. After clamping, one end of the drive shaft is fixed in the movable fixture 7, and the other end of the drive shaft is fixed in the rotary fixture 5.

[0020] Then, the welding posture is adjusted according to the different sizes of the drive shaft. The welding robot 9 can move on the welding machine moving slide rail 3, and the welding torch 10 adjusts its posture through the robotic arm to adapt to the weld seam at different positions of the drive shaft. The servo motor 11 drives the rotating fixture 5 to rotate at a uniform speed with the workpiece, and adjusts the workpiece rotation speed according to the welding requirements to ensure accurate welding angle and position.

[0021] Finally, the MIG welding process is executed. The welding power supply is activated, and the consumable electrode wire inside the welding torch 10 fuses with the workpiece base material. Inert gas is ejected to create a protective atmosphere, preventing oxidation of the aluminum alloy during welding and ensuring weld quality. Welding parameters are matched based on experience, and the rotating fixture 5 maintains a constant, uniform rotation speed to achieve continuous welding of the drive shaft, resulting in a high-quality connection.

[0022] After welding is completed, the welding torch 10 is powered off and the gas is shut off, and the welding robot 9 is reset. The moving fixture 7 is released, and the moving fixture table 6 moves the workpiece out along the fixed fixture slide rail 4. The operator quickly removes the workpiece and begins the next cycle.

Claims

1. A special welding machine for MIG welding of aluminum alloy drive shafts, comprising a controller and a base (1), wherein a "∏"-shaped bracket (2) is provided on the base (1), characterized in that: The bracket (2) is provided with a welding machine moving slide rail (3), and a welding mechanism is slidably connected on the welding machine moving slide rail (3). A fixed clamp slide rail (4) is provided on the end face of the base (1). A rotating clamp (5) is installed at one end of the fixed clamp slide rail (4), and a moving clamp mechanism is installed at the other end of the fixed clamp slide rail (4). The moving clamp mechanism forms a 90° angle with the fixed clamp slide rail (4).

2. The special welding machine for MIG welding of aluminum alloy drive shafts according to claim 1, characterized in that: The movable clamping mechanism includes a movable clamping table (6) and a movable clamp (7). The movable clamping table (6) is slidably connected to the fixed clamping slide rail (4). The movable clamping table (6) and the fixed clamping slide rail (4) form a 90° angle. A movable clamping slide rail (8) is provided on the end face of the movable clamping table (6). The movable clamp (7) is slidably connected to the movable clamping slide rail (8).

3. The special welding machine for MIG welding of aluminum alloy drive shafts according to claim 1, characterized in that: The welding mechanism includes a welding robot (9) and a welding torch (10) located at the end of the welding robot (9), the welding robot (9) being slidably connected to the welding machine moving slide rail (3).

4. The special welding machine for MIG welding of aluminum alloy drive shafts according to claim 1, characterized in that: The rotating clamp (5) is connected to the servo motor (11) via a coupling.

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