关键词: 检具设计|定位点布局|连续搜索|多目标优化

Abstract: To hold a checked part with complex freeform surface accurately and stably in checking fixture design, a moving point method based on 3-2-1 constraint was proposed which made locator move on the part's surface continuously. It could remove the precision loss in traditional optimization methods by model discretization. At the same time, a multiobjective optimization and decision algorithm for locating scheme was proposed by taking the accuracy and stability as two optimization objects, and the final optimization solution was selected without manual intervention. The algorithm was realized based on CAD software and two case studies were presented to verify its feasibility and practicability.

Key words: checking fixture design|locator layout|continuous searching|multi-objective optimization