Torsion beam welding assembly structure

Abstract

The invention relates to a torsion beam welding assembly structure and belongs to the technical field of automobile design and manufacture. The torsion beam welding assembly structure comprises a sheet metal structure formed by welding in a fastened mode two vertical surfaces of a C-section-shaped grooved upper plate and two vertical surfaces of a C-section-shaped grooved lower plate; the sheet metal structure is composed of a middle beam section, a left end and a right end at both ends of the middle beam section, and left and right transitional sections between the middle beam section and thetwo ends; the left end and the right end, as well as the left transitional section and the right transitional section, are structurally symmetric. The torsion beam welding assembly structure integrates a left longitudinal arm and a right longitudinal arm with the cross beam without T-shaped lap welding, and has a cross section in a closed structure, thereby being higher in fatigue performance than common open beams; meanwhile, the torsion beam welding assembly structure is regular in integral shape, smooth in welding joints, capable of reducing the number of the welding joints, and favorableto achieving robot welding.

Description

technical field [0001] The invention relates to the technical field of automobile design and manufacture, more specifically, the invention relates to a torsion beam welding assembly structure. Background technique [0002] figure 1 It shows the conventional torsion beam welding assembly structure in the prior art, in which the torsion beam beam usually adopts a single-plate open structure (a torsion bar can be welded inside) or a closed-section beam formed by internal high pressure forming, and the end of the beam is connected to the The trailing arm is welded in a T-shape lap joint. This torsion beam welded assembly structure in the prior art has the following technical problems: [0003] 1) The beam and the longitudinal arm are welded, which is prone to stress concentration areas; [0004] 2) The edge of the open beam is prone to stress concentration due to manufacturing defects, reducing fatigue life; [0005] 3) The internal high-pressure formed beam cannot add torsi...

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Problems solved by technology

[0003] 1) The beam and the longitudinal arm are welded, which is prone to stress concentration areas;

[0004] 2) The edge of the open beam is prone to stress concentration due to manufacturing defects, reducing fatigue life;

[0005] 3) The internal high-pressure formed beam cannot add torsion bars like the open beam, and it is not easy to obtain the required roll stiffness in the later adjustment;

[0006] 4) The welding line is complicated, it is not easy to realize automatic welding, and the welding quality is not easy to guarantee

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