Pneumatic double-cylinder liner positioning mechanism for automobile welding fixture

Abstract

The invention discloses a pneumatic dual-air-cylinder type liner positioning mechanism of an automobile welding clamp. A piston rod of a first air cylinder is connected with the lower end of a guide column. A positioning pin is installed at the top end of the guide column. A second air cylinder is installed on a guide barrel and connected with one end of a pressing arm, and a pressing head is fixed to the bottom face of the other end of the pressing arm. A big-end-up two-section type stepped hole is formed in the center of the positioning pin, and a long countersunk bolt is arranged in the stepped hole in a penetrating manner. Mounting holes are formed in the four corners of a positioning ring, and a convex block is arranged between every two adjacent mounting holes in the circumferential direction. A connector is arranged between the guide column and the piston rod of the first air cylinder. A boss at the head of the connector is clamped into a T-shaped through slot in the lower end of the guide column. The lower end of the connector is in threaded connection with the piston rod of the first air cylinder. A connection plate is arranged between the guide barrel and the second air cylinder and is formed by stamping a steel plate. The connection plate is provided with a first plate body and a second plate body, and an obtuse angle is formed between the first plate body and the second plate body. The pneumatic dual-air-cylinder type liner positioning mechanism of the automobile welding clamp is convenient to control and flexible and reliable in running. Moreover, liner pipes can be positioned accurately and stably.

Description

technical field [0001] The invention belongs to the technical field of fixtures, and in particular relates to a pneumatic double-cylinder liner positioning mechanism for an automobile welding fixture. Background technique [0002] The rear axle assembly of the automobile is composed of a beam, a longitudinal arm, a spring seat, a liner, a parking brake cable bracket, an oil pipe bracket and a shock absorber mounting seat, etc., and the longitudinal arms are welded symmetrically at both ends of the beam. Weld liner, parking brake cable bracket, shock absorber mount and oil pipe bracket in sequence. During welding, it is necessary to position the beam, longitudinal arm, spring seat, liner, etc. in different steps with the help of multiple tooling. The existing liner positioning tool has complex structure, large space occupation, high cost, difficult alignment, and poor positioning stability, which makes it difficult to guarantee the welding quality and fail to meet the requir...

AI Technical Summary

Problems solved by technology

The existing liner positioning tool has complex structure, large space occupation, high cost, difficult alignment, and poor positioning stability, which makes it difficult to guarantee the welding quality and fail to meet the requirements of consistent production

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