关键词: 模具结构参数, 工艺参数, 部分析因设计, 径向基函数, 粒子群算法

Abstract:

In view of  the shortcomings of the besides-star wheel extrusion process,a joint  multi-objective optimization design of structural and process parameters was applied,expecting to improve the severe service conditions and balance the needs between the better filling capacity and longer die life.A fractional factorial experimental design method was used to evaluate main effects of the structural and process parameters on filling capacity and the maximum deformation load.The Latin hypercube method was used to carry out sampling of
parameters,and the obtained samples were analyzed by finite elements simulation.The RBF meta-models were built by taking simulation results as responses and the structural and process parameters as variables. Models were  onverted into single objective function by linear weighting method. The optimum parameters of structure and process were obtained by using particle swarm optimization algorithm for global optimization. Finally, the research object was verified by simulation
tests.

Key words: structural parameter, process parameter, fractional factorial design, radial basis function(RBF) model, particle swarm optimization