A double-clamping self-centering welding device for a dust cover of a shock absorber

Abstract

This utility model relates to the technical field of vibration damper manufacturing and processing equipment, and discloses a double-clamping self-centering welding device for vibration damper dust covers. The device includes a machine base with a self-centering two-jaw rotary chuck and a welding torch. The self-centering two-jaw rotary chuck includes a rotating base with a pair of first jaws for clamping the vibration damper. A pair of second jaws for clamping the dust cover are hinged to the first jaws, and the clamping centers of the first and second jaws are coaxial. This utility model achieves automatic centering and positioning of the vibration damper and dust cover through a double-clamping self-centering structure, effectively solving the concentricity deviation problem in traditional welding processes and significantly improving welding accuracy and production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of shock absorber production and processing equipment, specifically to a double-clamping self-centering welding device for shock absorber dust covers. Background Technology

[0002] As a core component of the train suspension system, the assembly quality of the hydraulic shock absorber directly affects the vehicle's driving stability and comfort. The dust cover, as a key protective component of the shock absorber, must be firmly connected to the shock absorber body through welding to prevent impurities from entering the shock absorber and causing component wear. The existing welding process for shock absorber dust covers generally employs a combination of manual pre-positioning and automatic welding: First, the operator manually aligns the dust cover with the shock absorber end cap, fixes their relative positions by spot welding, and then clamps the pre-fixed components into an automatic welding machine to complete the circumferential weld. The corresponding existing automatic welding machines mainly consist of a support mechanism and a rotating mechanism. During clamping, the height of the support mechanism needs to be manually adjusted to align the shock absorber axis with the rotation axis of the rotating mechanism. Then, the rotating head of the rotating mechanism clamps the rubber joint mounting holes of the shock absorber. After manually calibrating the welding torch position, the rotating mechanism is driven to rotate the shock absorber, achieving the weld. However, the aforementioned existing technologies have many significant drawbacks. In terms of production efficiency, the manual spot welding pre-positioning process consumes a large amount of time, becoming a bottleneck. This not only fails to fully utilize the advantages of automated welding equipment but also increases labor costs. Furthermore, manual operation is susceptible to fatigue and skill differences, reducing production consistency. Simultaneously, because the dust cover is a thin-plate structure, it is prone to deformation during handling after pre-positioning; the support mechanism relies on manual height adjustment, making error elimination difficult; and the rotating mechanism, clamped through rubber joint mounting holes that are not coaxial with the vibration damper, causes rotational eccentricity, causing the welding torch to deviate from the optimal position of the weld. Regarding welding quality, concentricity errors and eccentric rotation lead to inconsistent distances between the welding torch and the weld, easily resulting in uneven weld width and incomplete penetration. Most products require post-processing and grinding for repair, increasing process costs and affecting the assembly accuracy of the vibration damper. In addition, the vibration damper diameter covers a wide range, and the existing equipment's support and clamping structure is cumbersome to adjust, easily introducing new errors and making it difficult to quickly adapt to multiple product specifications.

[0003] Therefore, there is an urgent need to develop a double-clamp self-centering welding device for dust covers of shock absorbers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a double-clamping self-centering welding device for dust covers of shock absorbers, so as to eliminate the manual pre-positioning process, realize high-precision coaxial self-centering clamping of shock absorbers and dust covers, and improve welding efficiency and weld quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A double-clamping self-centering welding device for dust covers of vibration dampers, characterized in that it includes a machine base, wherein the machine base is provided with a self-centering two-jaw rotating chuck and a welding torch; The self-centering two-jaw rotary chuck includes a rotating base, on which a pair of first jaws for clamping the end cap of the shock absorber are provided. A pair of second jaws for clamping the dust cover are hinged to the first jaws. The clamping centers of the first jaws and the second jaws are coaxial.

[0006] Preferably, the self-centering two-jaw rotary chuck is provided with a driving mechanism to drive a pair of first jaws to move radially toward or away from each other along the rotary base.

[0007] Preferably, a hinge shaft is rotatably connected to the first gripper, the hinge shaft is fixedly connected to the second gripper, and a drive assembly is provided on the first gripper to drive a pair of second grippers to rotate towards or away from each other around the hinge point.

[0008] Preferably, the drive assembly includes a drive cylinder, the cylinder body of which is rotatably connected to the first gripper via a rotating shaft, and the piston rod end of which is rotatably connected to the second gripper via a pin.

[0009] Preferably, the machine base is further provided with a support frame, and the welding torch is mounted on the support frame and slidably connected to the support frame.

[0010] Preferably, a support turntable is provided on the side of the machine base away from the self-centering two-jaw rotary chuck. The support turntable is a two-jaw self-centering gripper, and the gripping center of the support turntable is coaxial with the gripping center of the first jaw.

[0011] Preferably, the clamping surfaces of the first gripper and the second gripper are both V-shaped.

[0012] The beneficial effects of this utility model are as follows: This utility model uses the design of two pairs of synchronously linked gripper components of a self-centering two-jaw rotary chuck to form a double clamping structure with the first gripper and the second gripper hinged thereon. Moreover, the clamping centers of the shock absorber and the dust cover are coaxial, eliminating the need for manual pre-positioning and height adjustment, and directly achieving high-precision self-centering alignment between the two. This completely eliminates the manual spot welding pre-positioning process, greatly improves production efficiency, and avoids the deformation problem of the thin plate dust cover during transportation, ensuring the consistency of welding reference. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the double-clamping self-centering welding device for the dust cover of the shock absorber according to Embodiment 1 of this utility model; Figure 2This is a schematic diagram of the structure of the self-centering two-jaw rotary chuck of Embodiment 1 of this utility model in the loosened clamping state; Figure 3 This is a schematic diagram of the structure of the self-centering two-jaw rotary chuck of Embodiment 1 of this utility model in the loosened clamping state; Figure 4 This is a schematic diagram of the shock absorber and dust cover of Embodiment 1 of this utility model.

[0014] Reference numerals: 10-Machine base, 20-Vibration damper, 21-Vibration damper oil reservoir, 22-Vibration damper end cover, 30-Self-centering two-jaw rotary chuck, 31-Rotating base, 32-First jaw, 33-Second jaw, 34-Drive cylinder, 35-Hinge shaft, 36-Rotating shaft, 37-Pin shaft, 40-Welding torch, 50-Support frame, 60-Support turntable, 70-Dust cover. Detailed Implementation

[0015] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0016] Example 1 like Figures 1 to 3 As shown, this embodiment discloses a double-clamping self-centering welding device for a dust cover of a vibration damper, including a machine base 10, on which a self-centering two-jaw rotary chuck 30 and a welding torch 40 are provided. The self-centering two-jaw rotary chuck 30 includes a rotating base 31, on which a pair of first jaws 32 for clamping the end cap of the vibration damper 20 are provided. A pair of second jaws 33 for clamping the dust cover 70 are hinged to the first jaws 32. The clamping centers of the first jaws 32 and the second jaws 33 are coaxial.

[0017] The self-centering two-jaw rotary chuck 30 is equipped with a drive mechanism. Specifically, the drive mechanism can be a bidirectional screw and nut mechanism to drive a pair of first jaws 32 to move synchronously towards or away from each other along the radial direction of the rotating base 31, so as to ensure that the shock absorber 20 can be automatically centered when it is clamped, and achieve precise centering.

[0018] Each first gripper 32 is rotatably connected to a second gripper 33 via a hinge shaft 35. A drive assembly is disposed on the first gripper 32 to drive the second gripper 33 to rotate around the hinge shaft 35. The drive assembly includes a drive cylinder 34, the cylinder body of which is rotatably connected to the first gripper 32 via a rotating shaft 36, and the end of the piston rod of the drive cylinder 34 is hinged to the second gripper 33 via a pin 37. When the piston rod of the cylinder extends or retracts, it directly drives the second gripper 33 to rotate around the hinge shaft 35 connected to the first gripper 32, thereby achieving the clamping or releasing of the dust cover 70.

[0019] The machine base 10 is also equipped with a support frame 50. The welding torch 40 is slidably mounted on the support frame 50 (preferably a slide rail mechanism, not shown in the figure) to allow the welding torch 40 to be raised and lowered to adapt to the welding process. In addition, a support turntable 60 is provided on the side of the machine base 10 away from the self-centering two-jaw rotary chuck 30. The support turntable 60 is a two-jaw self-centering gripper, and its gripping center is precisely coaxial with the gripping center of the first jaw 32 through precision machining. Preferably, the support turntable 60 adopts a passively rotatable structure design and is equipped with bearings inside. It can rotate freely with the workpiece during the welding process, providing stable auxiliary support for the vibration damper 20 and preventing the workpiece from deforming or vibrating due to excessive overhang.

[0020] The clamping surfaces of the first jaw 32 and the second jaw 33 both adopt a V-shaped structure design. The structural characteristics of the V-shape give it a good self-centering function. When the jaws are closed, they can automatically guide the cylindrical workpiece to the center position of the V-groove, thereby adapting to the precise clamping of workpieces of different diameters and effectively compensating for the outer diameter manufacturing tolerance of the workpiece.

[0021] Its specific working principle is as follows: First, place the damper 20 oil reservoir cylinder on the support turntable 60, and activate the clamping mechanism of the support turntable 60 to automatically center and clamp the oil reservoir cylinder. The support turntable 60 can rotate freely during this process to facilitate adjustment of the workpiece angle.

[0022] Next, the first drive cylinder 34 inside the self-centering two-jaw rotary chuck 30 is activated, driving a pair of first jaws 32 to move synchronously towards the center via a synchronous transmission mechanism, firmly clamping the end cap of the shock absorber 20. Due to the action of the self-centering mechanism, the shock absorber 20 is automatically adjusted to a position coaxial with the rotation axis 36.

[0023] Then, the operator places the dust cover 70 onto the end cap of the shock absorber 20 and performs initial manual alignment. The drive cylinder 34 is activated, driving the second gripper 33 to rotate around the hinge point towards the center. Its V-shaped clamping surface automatically corrects the position of the dust cover 70, aligning its axis with the axis of the shock absorber 20, thus completing precise centering and clamping.

[0024] Once positioning is complete, begin the welding process: The rotating mechanism first drives the workpiece to rotate, so that the starting point of the weld seam is in a horizontal position (0 degrees). The welding torch 40 descends to the preset position, performs the first small weld on the circumferential weld seam, and then rises.

[0025] The rotating mechanism rotates 180 degrees, positioning the symmetrical points of the weld seam in the welding position. The welding torch 40 descends to perform a second tack weld and then rises again. These two points initially secure the dust cover 70.

[0026] The drive cylinder 34 is activated, releasing the second gripper 33 and releasing the active constraint on the dust cover 70 (at this time, the dust cover 70 has been initially connected to the end cover by spot welding).

[0027] The rotating mechanism continues to rotate 90 degrees, and the welding torch descends 40 degrees to perform the third spot welding.

[0028] Then rotate it 180 degrees and perform the fourth spot welding. Through these four evenly distributed spot welding points, the dust cover 70 is firmly and temporarily fixed to the end cap.

[0029] Finally, the rotating mechanism drives the damper 20 to start rotating continuously and at a constant speed, and the welding torch 40 descends to perform continuous and uniform automatic welding along the circumferential seam until the entire circumferential weld is completed.

[0030] In summary, this embodiment achieves high-precision and high-efficiency welding of the vibration damper and dust cover through a dual-clamp self-centering structure and optimized welding process, significantly improving production efficiency and product quality consistency.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-clamping self-centering welding device for dust covers of vibration dampers, characterized in that, Includes a machine base, which is equipped with a self-centering two-jaw rotary chuck and a welding torch; The self-centering two-jaw rotary chuck includes a rotating base, on which a pair of first jaws for clamping the end cap of the shock absorber are provided. A pair of second jaws for clamping the dust cover are hinged to the first jaws. The clamping centers of the first jaws and the second jaws are coaxial.

2. The double-clamping self-centering welding equipment for a dust cover of a vibration damper according to claim 1, characterized in that, The self-centering two-jaw rotary chuck is equipped with a driving mechanism to drive a pair of first jaws to move radially toward or away from each other along the rotary base.

3. The double-clamping self-centering welding equipment for a dust cover of a vibration damper according to claim 1, characterized in that, A hinge shaft is rotatably connected to the first gripper, and one end of the hinge shaft away from the first gripper is fixedly connected to a second gripper. A drive assembly is provided on the first gripper, and a pair of drive assemblies on the first gripper respectively drive a pair of second grippers to rotate towards or away from each other around the hinge point.

4. The double-clamping self-centering welding equipment for a dust cover of a vibration damper according to claim 3, characterized in that, The drive assembly includes a drive cylinder, the cylinder body of which is rotatably connected to the first gripper via a rotating shaft, and the piston rod end of which is rotatably connected to the second gripper via a pin.

5. A double-clamping self-centering welding device for a dust cover of a vibration damper according to claim 1, characterized in that, The machine base is also provided with a support frame, and the welding torch is mounted on the support frame and slidably connected to the support frame.

6. The double-clamping self-centering welding equipment for a dust cover of a vibration damper according to claim 1, characterized in that, A support turntable is also provided on the side of the machine base away from the self-centering two-jaw rotary chuck. The support turntable is a two-jaw self-centering gripper, and the gripping center of the support turntable is coaxial with the gripping center of the first jaw.

7. A double-clamping self-centering welding device for a dust cover of a vibration damper according to claim 1, characterized in that, The clamping surfaces of both the first and second grippers are V-shaped.

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