An adjustable welding fixture for automobile chassis

Abstract

This invention discloses an adjustable welding fixture for automobile chassis, relating to the field of automotive product processing equipment technology. It includes a fixture frame, a limiting crank, a corner limiting mechanism, and a pad positioning mechanism. The output of the drive motor rotates the crank, causing the arc-shaped oscillating component to rotate around a slider at a fixed angle. This, combined with the slotted top support plate at the lower end and the clamping heads on both sides holding the pad, positions the pad vertically within the inner wall of the crossbeam, ensuring the welding verticality of the pad. Tightening the upper knob provides strong pressure to prevent thermal stress deformation, ensuring the welding quality between the pad and the inner wall of the crossbeam. The installation positions of the pressure seat and positioning support, the two clamping heads on the slotted top support plate, and the lifting frame on the adjusting frame are all adjustable, allowing this welding fixture to adapt to various models of automobile chassis workpieces.

Description

Technical Field

[0001] This invention relates to the field of automotive product processing equipment technology, specifically to an adjustable welding fixture for automotive chassis. Background Technology

[0002] Currently, when welding automotive chassis components, the component body needs to be fixed first before welding can begin. The upper and lower crossbeams of the automotive chassis body require welding pads. Existing technology involves positioning the automotive chassis on a specific welding platform. After the crossbeams and longitudinal beams are welded, the state of the pads to be welded is manually adjusted according to the specific situation to complete the welding operation of the automotive chassis components.

[0003] However, after long-term use, the existing technology still has some drawbacks, such as: First, during the welding process of the pad plate to the crossbeam, due to the thinness of the bent surface at the welding end, the bending area is deformed under the welding thermal stress, which leads to a welding gap between the pad plate and the inner wall of the crossbeam. It is difficult to guarantee the welding quality and verticality of the pad plate, which affects the later use of the chassis product; Second, the existing welding equipment can weld various models of automobile chassis workpieces by setting different positioning fixtures, but the fixtures are not adjustable as a whole, resulting in poor applicability. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable welding fixture for automobile chassis to solve the above-mentioned defects caused by the prior art.

[0005] An adjustable welding fixture for an automobile chassis includes a fixture frame, limiting cranks, a corner limiting mechanism, and a pad positioning mechanism. Multiple limiting cranks are mounted on the fixture frame, which has clearance holes. The corner limiting mechanism is installed within these clearance holes and is used to limit the position of the automobile chassis body. The pad positioning mechanism is mounted on the fixture frame and is used to ensure the verticality of the pad welding within the automobile chassis body.

[0006] Preferably, the corner limiting mechanism includes a cylinder, a positioning support, and a pressure bearing seat. The cylinder is installed in the clearance hole, and a support seat is installed at the output end of the cylinder. A drilling adjustment arm is installed at the upper end of the support seat. The positioning support is adjustablely installed on the drilling adjustment arm, and the pressure bearing seat is installed on the tooling frame and placed directly below the positioning support.

[0007] Preferably, the pad positioning mechanism includes an adjusting frame, a drive motor, and clamping heads. The adjusting frame is mounted on a tooling frame, and a lifting frame is slidably mounted on the adjusting frame via a slide rod. A screw is rotatably mounted at the upper middle part of the lifting frame, and the screw is threadedly connected to the adjusting frame. A knob is coaxially mounted on the top end of the screw. The drive motor is mounted on the adjusting frame, and a crank is mounted on the output end of the drive motor. A slider one is movably mounted on the other end of the crank. Two sliders two are also slidably mounted on the lifting frame. An arc-shaped swing member is rotatably mounted between the two sliders two. Slider one is slidably mounted on the upper end of the arc-shaped swing member. A slotted top support plate is adjustablely mounted on the lower part of the arc-shaped swing member. There are two clamping heads, which are symmetrically and adjustablely mounted at both ends of the slotted top support plate.

[0008] Preferably, the pressure-bearing seat and the positioning support are both matched with the corner of the vehicle chassis body.

[0009] Preferably, the clamping head cooperates with the pad inside the vehicle chassis body.

[0010] Preferably, the swing range of the slotted top support plate is located within the vertical projection of the vehicle chassis body.

[0011] The advantages of this invention are:

[0012] By setting a corner limiting mechanism and a pad positioning mechanism on the tooling frame, the output end of the drive motor drives the crank to rotate, and the other end of the crank drives the slider one to slide in the upper surface of the arc top swing component, thereby driving the arc top swing component to rotate around the slider two at a fixed angle. In this way, the slotted top support plate at the lower end, together with the clamping heads of the pads on both sides, drives the pad to be positioned vertically in the inner wall of the beam, ensuring the welding verticality of the pad. With the knob at the upper end tightened, the strong pressure can prevent thermal stress deformation and ensure the welding quality between the pad and the inner wall of the beam.

[0013] The installation positions of the pressure bearing seat and positioning support, the installation positions of the two clamping heads on the slotted top support plate, and the installation positions of the lifting frame on the adjusting frame are all adjustable, making the welding fixture adaptable to various models of automobile chassis workpieces. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the angle limiting mechanism in this invention.

[0016] Figure 3 This is a schematic diagram of the pad positioning mechanism in this invention.

[0017] Figure 4This is a schematic diagram of the assembly of the clamping head and the slotted top support plate in this invention.

[0018] Among them, 1-tooling frame, 2-limiting crank, 3-corner limiting mechanism, 4-pad positioning mechanism, 5-avoidance hole, 301-cylinder, 302-positioning pressure support, 303-pressure bearing seat, 304-support seat, 305-drilling adjustment arm, 401-adjustment frame, 402-drive motor, 403-clamping head, 404-slide rod, 405-lifting frame, 406-screw, 407-knob, 408-crank, 409-slider one, 410-slider two, 411-arc top swing component, 412-grooved top support plate. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1 to 4 As shown, an adjustable welding fixture for an automobile chassis includes a fixture frame 1, a limiting crank 2, a corner limiting mechanism 3, and a pad positioning mechanism 4. Multiple limiting cranks 2 are mounted on the fixture frame 1. The fixture frame 1 has clearance holes 5. The corner limiting mechanism 3 is installed within the clearance holes 5 and is used to limit the position of the automobile chassis body. The pad positioning mechanism 4 is mounted on the fixture frame 1 and is used to ensure the verticality of the pad welding within the automobile chassis body.

[0021] In this embodiment, the corner limiting mechanism 3 includes a cylinder 301, a positioning support 302, and a pressure seat 303. The cylinder 301 is installed in the clearance hole 5, and a support seat 304 is installed at the output end of the cylinder 301. A drilling adjustment arm 305 is installed at the upper end of the support seat 304. The positioning support 302 is adjustablely installed on the drilling adjustment arm 305. The pressure seat 303 is installed on the tooling frame 1 and is located directly below the positioning support 302.

[0022] In this embodiment, the pad positioning mechanism 4 includes an adjusting frame 401, a drive motor 402, and a clamping head 403. The adjusting frame 401 is mounted on the tooling frame 1. A lifting frame 405 is slidably mounted on the adjusting frame 401 via a slide rod 404. A screw 406 is rotatably mounted at the upper center of the lifting frame 405. The screw 406 is threadedly connected to the adjusting frame 401. A knob 407 is coaxially mounted on the top end of the screw 406. The drive motor 402 is mounted on the adjusting frame 401. A crank 408 is installed at the output end of 02. A slider 409 is movably installed at the other end of the crank 408. A second slider 410 is symmetrically installed on the lifting frame 405. An arc-shaped swing member 411 is rotatably installed between the two second sliders 410. The slider 409 is slidably installed on the upper end of the arc-shaped swing member 411. A slotted top support plate 412 is adjustablely installed on the lower part of the arc-shaped swing member 411. Two clamping heads 403 are symmetrically and adjustablely installed at both ends of the slotted top support plate 412.

[0023] It should be noted that the drive motor 402 is a servo motor.

[0024] In this embodiment, the pressure-bearing seat 303 and the positioning support part 302 are both matched with the corner of the automobile chassis body.

[0025] In addition, the clamping head 403 cooperates with the pad inside the vehicle chassis body, and the swing range of the slotted top support plate 412 is within the vertical projection of the vehicle chassis body.

[0026] Working process and principle: In the process of using this invention, firstly, according to the model of the car chassis to be welded, the installation positions of the bearing seat 303 and the positioning support 302 are adjusted on the tooling frame 1 and the drilling adjustment arm 305 respectively. At the same time, according to the model of the pad, the installation positions of the two clamping heads 403 on the slotted top support plate 412 are adjusted. Finally, the installation position of the lifting frame 405 on the adjustment frame 401 is adjusted by rotating the knob 407 via the screw 406. Then, the car chassis body to be welded is placed on multiple limiting cranks 2, and the following steps are then performed:

[0027] The start cylinder 301 causes its output end to drive the positioning support part 302 downward via the support seat 304 and the perforated adjusting arm 305. Together with the pressure seat 303 directly below, they clamp the corner end of the car chassis body. At this time, the welding of the crossbeams, longitudinal beams and other external components on the chassis is completed.

[0028] After the welding of the corresponding external components is completed, the internal components, i.e., the pads, are positioned and welded. Specifically, the drive motor 402 is started so that its output end drives the crank 408 to rotate. The other end of the crank 408 drives the slider 1 409 to slide in the upper surface of the arc-top swing member 411, thereby driving the arc-top swing member 411 to rotate around the slider 2 410 at a fixed angle. In this way, the slotted top support plate 412 at the lower end, together with the clamping heads 403 on both sides that hold the pads, drives the pads to be positioned vertically in the inner wall of the beam. At this time, the welding operation of the pads is performed. At the same time, the knob 407 at the upper end is further tightened. Under strong pressure, thermal stress deformation can be prevented.

[0029] Based on the above, the present invention sets a corner limiting mechanism 3 and a pad positioning mechanism 4 on the tooling frame 1. The output end of the drive motor 402 drives the crank 408 to rotate. The other end of the crank 408 drives the slider 409 to slide in the upper surface of the arc top swing member 411, thereby driving the arc top swing member 411 to rotate around the slider 410 at a fixed angle. In this way, the slotted top support plate 412 at the lower end cooperates with the clamping heads 403 on both sides to drive the pad to be positioned vertically in the inner wall of the beam, ensuring the welding verticality of the pad. With the knob 407 at the upper end tightened, the thermal stress deformation can be prevented under strong pressure, ensuring the welding quality between the pad and the inner wall of the beam.

[0030] The installation positions of the pressure seat 303 and the positioning support part 302, the installation positions of the two clamping heads 403 on the slotted top support plate 412, and the installation position of the lifting frame 405 on the adjusting frame 401 are all adjustable, so that the welding fixture can be adapted to various models of automobile chassis workpieces.

[0031] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. An adjustable welding fixture for automobile chassis, characterized in that, The system includes a tooling frame (1), a limiting crank (2), a corner limiting mechanism (3), and a pad positioning mechanism (4). There are multiple limiting cranks (2) and they are all located on the tooling frame (1). The tooling frame (1) has clearance holes (5). The corner limiting mechanism (3) is installed in the clearance holes (5) and is used to limit the position of the car chassis body. The pad positioning mechanism (4) is installed on the tooling frame (1) and is used to ensure the verticality of the pad welding inside the car chassis body. The pad positioning mechanism (4) includes an adjusting frame (401), a drive motor (402), and a clamping head (403). The adjusting frame (401) is mounted on the tooling frame (1). A lifting frame (405) is slidably mounted on the adjusting frame (401) via a slide rod (404). A screw (406) is rotatably mounted on the upper middle part of the lifting frame (405). The screw (406) is threadedly connected to the adjusting frame (401). A knob (407) is coaxially mounted on the top end of the screw (406). The drive motor (402) is mounted on the adjusting frame (401). A crank (408) is installed at the output end of the 402. A slider (409) is movably installed at the other end of the crank (408). A slider (410) is also slidably installed on the lifting frame (405). An arc-shaped swing member (411) is rotatably installed between the two sliders (410). The slider (409) is slidably installed at the upper end of the arc-shaped swing member (411). A slotted top support plate (412) is adjustablely installed at the lower part of the arc-shaped swing member (411). There are two clamping heads (403) that are symmetrically and adjustablely installed at both ends of the slotted top support plate (412).

2. The adjustable welding fixture for an automobile chassis according to claim 1, characterized in that: The corner limiting mechanism (3) includes a cylinder (301), a positioning support (302), and a pressure seat (303). The cylinder (301) is installed in the clearance hole (5). A support seat (304) is installed at the output end of the cylinder (301). A drilling adjustment arm (305) is installed at the upper end of the support seat (304). The positioning support (302) is adjustablely installed on the drilling adjustment arm (305). The pressure seat (303) is installed on the tooling frame (1) and placed directly below the positioning support (302).

3. The adjustable welding fixture for an automobile chassis according to claim 2, characterized in that: The pressure-bearing seat (303) and the positioning support (302) are both matched with the corner of the automobile chassis body.

4. An adjustable welding fixture for an automobile chassis according to claim 1, characterized in that: The clamping head (403) is engaged with the pad inside the vehicle chassis body.

5. An adjustable welding fixture for an automobile chassis according to claim 1, characterized in that: The swing range of the slotted top support plate (412) is within the vertical projection of the automobile chassis body.

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