Manufacturing method of rear torsion beam suspension

Abstract

The invention discloses a method for manufacturing a rear torsion beam suspension, which comprises the following steps of: pre-forming a steel plate without defects through a mold in a rolling manner to obtain a cross beam blank with an unclosed opening; the cross beam in the blank state is shaped through a shaping die; a laser welding robot is adopted for the unclosed opening in the cross beam, so that the circumferential surface of the cross beam is in a closed state; the two manufactured longitudinal arm assemblies are symmetrically welded to the two ends of the finished cross beam; after the spring seat, the longitudinal arm assembly and the cross beam are pre-fixed in a spot welding mode, the cross beam is clamped on a clamp, the spring seat and the longitudinal arm assembly are welded through a laser welding robot according to a programmed path, the spring seat and the cross beam are welded through the laser welding robot, and continuous welding seams are formed among the longitudinal arm assembly, the spring seat and the cross beam; and the shock absorber bracket is welded with the longitudinal arm assembly and the spring seat. The rear torsion beam suspension has the advantage that the strength of the rear torsion beam suspension is improved.

Description

technical field [0001] The invention relates to the technical field of automobile rear torsion beam suspension, in particular to a manufacturing method of rear torsion beam suspension. Background technique [0002] The torsion beam semi-independent suspension is a commonly used car rear suspension structure at present. The trailing arms on the left and right sides are welded together by an integral V-shaped or U-shaped torsion beam, and the front end of the trailing arm is supported by rubber-metal. It is hingedly connected with the body, and connected with the wheel hub, shock absorber and spring at the rear end of the trailing arm. The longitudinal arm of the torsion beam can swing up and down around the rigid connection point so as to absorb the shock through the shock absorber and the shock absorption spring, and play the role of shock absorption. It has greater elasticity and can play the role of a horizontal stabilizer bar. Therefore, the torsion beam is the key comp...

AI Technical Summary

Problems solved by technology

[0003] The torsion beam is the key component of the torsion beam semi-independent suspension, which plays the role of transmitting force, receiving force and connecting the two sides of the balance. When the car is driving on an uneven road, the torsion beam will bear a lot of force. When the deformation of the frame is unequal, the torsion beam will be twisted and deformed, which requires high stress on the beam. If the design is not good, it is easy to cause cracks or even breakage of the beam, which will affect the stability and safety of the vehicle.

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