Design method of toe-in control arm

Abstract

The embodiment of the invention discloses a design method of a toe-in control arm. The design method comprises the following steps: analyzing the performance of a toe-in control arm of a reference vehicle to obtain a performance constraint parameter; determining a design space of an extrusion section of the toe-in control arm to be designed, and performing topological optimization on the extrusionsection based on the performance constraint parameters to obtain a material distribution form of the extrusion section; performing three-dimensional expansion along the thickness direction of the extrusion section to obtain a primary toe-in control arm; optimizing the appearance and the size of the primary toe-in control arm based on the performance constraint parameters to obtain a second toe-incontrol arm; carrying out process analysis on the second-edition toe-in control arm, and continuously adjusting structural parameters of the second-edition toe-in control arm according to an analysisresult to obtain a third-edition toe-in control arm; and performing performance analysis on the third-edition toe-in control arm to obtain performance parameters, and if the performance parameters are qualified, determining the third-edition toe-in control arm as a target toe-in control arm. And the light weight of the toe-in control arm can be effectively realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of automobile design, in particular to a design method of a toe control arm. Background technique [0002] The toe-in control arm is one of the force-transmitting parts of the chassis suspension system of the automobile. Its main function is to transmit the moment between the sub-frame and the steering knuckle, and change the toe-in angle of the wheel. The design of the toe control arm requires simple structure, good reliability and certain strength. [0003] Extruded profile toe-in control arm is finally formed by aluminum alloy extrusion, cutting, machining and other processes. Compared with steel pipe welding or aluminum alloy casting / forging process, it has light weight, low cost, simple process, low mold cost and high production efficiency. Advanced advantages. [0004] The current design method of the toe-in control arm is based on the original control arm of the benchmark v...

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Problems solved by technology

[0005] 1. If the design of the toe control arm of the benchmarking vehicle or platform vehicle is unreasonable, it will lead to unreasonable follow-up design of the newly designed toe control arm, which does not meet the design requirements or design redundancy, and wastes time and manpower;

[0006] 2. The current mainstream control arm lightweight optimization method mostly adopts topology optimization, which is relatively simple, with only one skeleton outline, the structure is not detailed enough, and the control of shape, size, and material thickness is not accurate;

[0007] 3. In addition to the performance and structure, the extrusion process factors are not considered in the design process of the extruded profile toe control arm. Although some structural optimization software can consider the die opening direction of stamping and forging, it cannot consider the extrusion process. Dimensional change and stress change of

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