Automobile front suspension lower control arm and its production method

Abstract

The invention discloses a novel structure of a control arm under an automotive suspension and a manufacturing method thereof. The control arm comprises a control arm body, a ball stud assemble used for connecting a steering knuckle, three bolts used for connecting the ball stud assemble with the control arm body, a front rubber bushing and a rear rubber bushing of the control arm; wherein, the control arm body is punch formed with a SAPH440 single steel sheet with the thickness of 3.0mm; the front rubber bushing and the rear rubber bushing of the control arm are pressed into the control arm body by a forcing press by adopting the method of interference fit. Compared with a control arm formed by butt welding of a lower body and an upper body, being punch formed by the single steel sheet, the control arm of the invention has the advantages of greatly reducing the weight, reducing the non-suspended mass and improving the operating stability and riding comfort of a vehicle. Meanwhile, with regard to the analytic results of the control arm under braking work condition, the punching design strength of the single steel sheet is sufficient to meet the performance requirements of the entire vehicle.

Description

technical field [0001] The invention relates to auto parts, in particular to the structure form of the lower control arm of the McPherson type front suspension. Background technique [0002] The existing control arms generally adopt the following two methods: [0003] 1. Welded control arm is adopted. The control arm is divided into upper body and lower body. During the manufacturing process, after the upper body and lower body are stamped and formed separately, the upper and lower body are combined by welding methods such as spot welding or seam welding. The mass of the control arm assembly adopting this method is heavy, which increases the unsuspended quality of the suspension; the deformation of the welding assembly is difficult to control, resulting in poor product consistency. [0004] 2. The forged aluminum alloy process is used to manufacture the control arm. Although it can reduce the non-suspension quality, the processing technology is complicated and the cost is h...

AI Technical Summary

Problems solved by technology

The mass of the control arm assembly using this method is heavy, which increases the unsuspended quality of the suspension; the deformation of the welding assembly is difficult to control, resulting in poor product consistency

[0004] 2. The forged aluminum alloy process is used to manufacture the control arm. Although it can reduce the non-suspension quality, the processing technology is complicated and the cost is high. At present, it is only used in high-end luxury cars, and it is not suitable for low-cost compact passenger cars.

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