Structural Optimization Design Of Automobile Flexible Welding Fixture

Structural optimization design can greatly improve both the efficiency and quality of product design, it has important engineering significance and broad application prospect. In this paper, the structural optimization design of key components of the automobile f lexible welding fixture is carried out. On the basis of above, the overall structure design of the key components is carried out. The main research contents of this paper are as follows:1. Based on the demand analysis and working principle of the automobile flexible welding fixture, the sliding transmission scheme and elevating transmission scheme is determined. Then, the selection and calculation of the driving components, transmission components and so on are carried out. In the end, cantilever component of the automobile flexible welding fixture is carried out.2. Taking lifting arm of automobile flexible welding fixture as the research object, the multiple load cases and dynamic vibration frequency is considered in the conceptual design stage. A comprehensive objective function is proposed by compromise programming method. And method is proposed to determine the weight coefficient of each working condition and dynamic vibration based on DEMAT EL. Then the multi-objective topology optimization design is applied to the structure of lifting arm. The lifting arm is designed according to the optimization results, and the results optimized are compared with two methods based on empirical design and orthogonal test design.3 Taking bracket of automobile f lexible welding fixture as the research object, lightweight optimization design is applied based on response surface method. The experiments are designed to select a set of sample points. On the basis of above, the response surface model of the displacement, maximum stress and mass of the bracket are constructed, and the response surface model fitting accuracy is analyzed. Finally, the optimal solution of the Pareto optimal solution is obtained by the optimization of the bracket.4. The optimized lifting arm and the cantilever are assembled into a cantilever component. The finite element model of the cantilever is established, and its performances are checked. On the basis of above, the structural design of the other structures of automobile flexible welding fixture is carried out and the 3D model of automobile flexible welding fixture is established.