Adjusting fixture for frame welding

Abstract

The utility model discloses a kind of adjusting clamps for frame welding, including welding operation platform, suction cup is installed on welding operation platform rest groove, two support frames are fixedly connected on welding operation platform, distance sensor is installed on support frame, two first electric push rods are fixedly installed on support frame, first electric push rod telescopic link is connected with first slide bar, slide rail frame is connected between two first slide bars, fixed frame is fixedly connected on slide rail frame, double-rod cylinder is fixedly installed on fixed frame, connecting rod is connected on double-rod cylinder telescopic link, two clamping plates are slidably connected on slide rail frame.The utility model improves the anti-vibration and anti-displacement ability of frame in welding process through the cooperation between suction cup, distance sensor, first electric push rod, slide rail frame, double-rod cylinder and clamping plate, the uniform dispersion stress of suction cup's negative pressure adsorption prevents frame deformation or sliding, to improve welding quality, and reduce the security risk caused by workpiece movement.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle frame welding technology, and in particular relates to an adjustment fixture for vehicle frame welding. Background Technology

[0002] In the automotive parts manufacturing industry, welding processes account for a significant proportion. Most of the time in welding processes is spent on auxiliary and clamping work. The design of welding fixtures not only directly affects the ease and accuracy of clamping, but also the difficulty and quality of welding.

[0003] Utility model patent CN203292742U discloses a subframe welding fixture, including a fixture base, a clamping mechanism, and a positioning mechanism. The clamping mechanism comprises a pneumatic cylinder and a clamping block, with the clamping block connected to the piston of the pneumatic cylinder. The positioning mechanism consists of positioning pins fixed to the fixture base, vertically arranged on the fixture base and corresponding to the four suspension points on the subframe. This device relies on a single clamping force, and the high-frequency vibration during welding can easily cause micro-displacement of the frame. Local stress concentration may lead to deformation, and displacement or deformation can directly cause defects such as porosity and cracks in the weld. Therefore, an adjusting fixture for frame welding is proposed. Summary of the Invention

[0004] The purpose of this utility model is to provide an adjustment fixture for vehicle frame welding to solve the problems mentioned in the background art.

[0005] An adjusting fixture for welding vehicle frames includes a welding worktable with a sliding groove and multiple mounting slots. A controller is mounted on the welding worktable, and suction cups are mounted on the mounting slots. Two support frames are fixedly connected to the welding worktable, and distance sensors are mounted on the support frames. Two first electric push rods are fixedly mounted on the support frames, and first sliding rods are connected to the telescopic rods of the first electric push rods. A slide rail is connected between the two first sliding rods, and a fixed frame is fixedly connected to the slide rail. A double-rod cylinder is fixedly mounted on the fixed frame, and a connecting rod is connected to the telescopic rod of the double-rod cylinder. Two clamping plates are slidably connected to the slide rail, and the clamping plates are connected to the connecting rods. A mounting base is fixedly connected to the welding worktable, and a second electric push rod is fixedly mounted on the mounting base. A second sliding rod is connected to the telescopic rod of the second electric push rod, and an auxiliary positioning plate is connected to the second sliding rod. The auxiliary positioning plate is slidably connected to the welding worktable.

[0006] Furthermore, anti-slip pads are provided on the plywood.

[0007] Furthermore, a cushioning pad is provided on the auxiliary positioning plate.

[0008] Furthermore, the controller is equipped with a start button and a stop button.

[0009] Furthermore, the distance sensor is connected to the controller signal to provide real-time feedback on the position of the mounting bracket and trigger the start and stop of the first electric push rod.

[0010] Furthermore, the suction cup is embedded in the mounting slot of the welding worktable, with the suction surface flush with the worktable surface.

[0011] The beneficial effects of this utility model are: This invention improves the vibration and displacement resistance of the chassis during welding by coordinating the suction cup, distance sensor, first electric push rod, slide rail, double-rod cylinder and clamping plate. The negative pressure of the suction cup evenly disperses stress, preventing chassis deformation or slippage, thereby improving welding quality and reducing safety risks caused by workpiece movement. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the adjusting clamp for welding the vehicle frame according to this utility model; Figure 2 This is a side view of the three-dimensional structure of the support frame; Figure 3 This is a side view of the three-dimensional structure of the slide rail bracket; Figure 4 This is a cross-sectional three-dimensional structural diagram of the welding workbench.

[0013] In the diagram, 1-welding operating table, 2-controller, 3-suction cup, 4-support frame, 5-distance sensor, 6-first electric push rod, 7-first slide rod, 8-slide rail frame, 9-fixed frame, 10-double rod cylinder, 11-connecting rod, 12-clamping plate, 13-mounting seat, 14-second electric push rod, 15-second slide rod, 16-auxiliary positioning plate. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figures 1 to 4The adjustable clamp for welding vehicle frames shown in this utility model includes a welding operating table 1, on which a sliding groove and multiple placement slots are formed. A controller 2 is installed on the welding operating table 1, and suction cups 3 are installed on the placement slots of the welding operating table 1. The suction force generated by the suction cups 3 is used to stabilize the vehicle frame. Two support frames 4 are fixedly connected to the welding operating table 1, and distance sensors 5 are installed on the support frames 4. Two first electric push rods 6 are fixedly installed on the support frames 4. First sliding rods 7 are connected to the telescopic rods of the first electric push rods 6. A slide rail frame 8 is connected between the two first sliding rods 7. A slide rail frame 8 is fixedly connected to the slide rail frame 8. A fixed frame 9 is connected to the chassis, on which a double-rod cylinder 10 is fixedly installed. A connecting rod 11 is connected to the telescopic rod of the double-rod cylinder 10. Two clamping plates 12 are slidably connected to the slide rail frame 8. The clamping plates 12 are connected to the connecting rod 11 and are used to clamp the chassis. A mounting base 13 is fixedly connected to the welding operating table 1. A second electric push rod 14 is fixedly installed on the mounting base 13. A second slide rod 15 is connected to the telescopic rod of the second electric push rod 14. An auxiliary positioning plate 16 is connected to the second slide rod 15 and is slidably connected to the welding operating table 1. The auxiliary positioning plate 16 is used to assist the chassis in positioning.

[0016] Anti-slip pads are provided on the clamping plate 12.

[0017] A buffer pad is provided on the auxiliary positioning plate 16.

[0018] The controller 2 is equipped with a start button and a stop button.

[0019] Distance sensor 5 is connected to controller 2 for real-time feedback of the position of the mounting bracket 9 and triggering the start and stop of the first electric push rod 6.

[0020] The suction cup 3 is embedded in the mounting slot of the welding workbench 1, with the suction surface flush with the workbench surface.

[0021] The controller 2 is a programmable logic controller (PLC). Its input port is connected to the distance sensor 5, the start button and the stop button, and its output port is connected to the first electric push rod 6, the second electric push rod 14, the double rod cylinder 10 and the negative pressure generator of the suction cup 3 through a relay module.

[0022] The working principle of this utility model is as follows: the distance sensor is equipped with a first threshold and a second threshold, and the value of the first threshold is greater than the value of the second threshold.

[0023] Based on the specific dimensions of the chassis, the second electric push rod is controlled to move the second slide rod and auxiliary positioning plate to a designated position. Then, one end of the chassis is pressed against the auxiliary positioning plate to roughly determine the welding location. Next, the chassis dimensions are input into the controller. After reading the data, the controller presses the start button, which first controls the first electric push rod to move the first slide rod, slide rail, fixing frame, double-rod cylinder, connecting rod, and clamping plate. When the distance between the fixing frame and the distance sensor reaches a preset first threshold, the first electric push rod stops working. Simultaneously, the double-rod cylinder moves the connecting rod and clamping plate inward to a designated position, aligning the clamping plate with the target position. The frame is clamped, and the suction cups attract the frame, improving its stability during welding. After welding, the stop button is pressed to stop the suction cups. Simultaneously, the double-rod cylinder moves the connecting rod and clamping plate outward to reset, causing the clamping plate to detach from the frame. Then, the first electric push rod moves the first slide rod, slide rail, fixing frame, double-rod cylinder, connecting rod, and clamping plate in the opposite direction. When the distance between the fixing frame and the distance sensor reaches the second threshold preset by the distance sensor, the first electric push rod stops, and the second electric push rod moves the second slide rod and auxiliary positioning plate in the opposite direction to reset.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjusting fixture for welding vehicle frames, characterized in that: The adjusting fixture for chassis welding includes a welding operating table with a sliding groove and multiple mounting slots. A controller is mounted on the welding operating table, and suction cups are mounted on the mounting slots. Two support frames are fixedly connected to the welding operating table, each with a distance sensor. Two first electric push rods are fixedly mounted on the support frames, each with a first sliding rod connected to its telescopic rod. A slide rail connects the two first sliding rods, and a fixed frame is fixedly connected to the slide rail. A double-rod cylinder is fixedly mounted on the fixed frame, and a connecting rod is connected to the telescopic rod of the double-rod cylinder. Two clamping plates are slidably connected to the slide rail, and these clamping plates are connected to the connecting rod. A mounting base is fixedly connected to the welding operating table, and a second electric push rod is fixedly mounted on the mounting base. A second sliding rod is connected to the telescopic rod of the second electric push rod, and an auxiliary positioning plate is connected to the second sliding rod. The auxiliary positioning plate is slidably connected to the welding operating table.

2. The adjusting fixture for chassis welding according to claim 1, characterized in that: Anti-slip pads are provided on the plywood.

3. The adjusting fixture for chassis welding according to claim 1, characterized in that: A cushioning pad is provided on the auxiliary positioning plate.

4. The adjusting fixture for chassis welding according to claim 1, characterized in that: The controller is equipped with a start button and a stop button.

5. The adjusting fixture for chassis welding according to claim 1, characterized in that: The distance sensor is connected to the controller signal to provide real-time feedback on the position of the mounting bracket and to trigger the start and stop of the first electric push rod.

6. The adjusting fixture for chassis welding according to claim 1, characterized in that: The suction cup is embedded in the mounting slot of the welding workbench, with the suction surface flush with the workbench surface.

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