부산대학교 도서관

The multi-objective optimization was studied in application of response surface method and orthogonal design for a preform design of vehicle thrust rod spherical hinge mandrel. Firstly, taking deformation uniformity and mold filling completeness as objectives, then an orthogonal experiment was designed to acquire main factors which influence total deformation quality. The effects of two main factors were precisely predicted through MATLAB and the results were discussed by optimal graphics. Secondly, on basis of optimized results, a second-order response surface model was established through equant design. The model was designed for preform re-optimization taking lower forging load and mold maximum effective stress as objectives. In application of preform optimization method, the best polytechnic parameters were selected, and qualified products were produced.