关键词: 夹具设计方案, 定位, 夹紧, 灰数, 逼近理想解排序法, 评价

Abstract: The ideal and non-ideal jig and fixture designs affected the quality and accuracy of workpiece. The selection method of location datum was analyzed, and the evaluation indexes of location datum were deeply studied to construct the corresponding factor expressions. The level model for locator scheme was established. Then, the evaluation model of clamping scheme was proposed, including three indexes, such as the constraint degrees of freedom, the processing stiffnesses, and the process costs. The sorting of location scheme was computed by grey TOPSIS, and the results were used to compute clamping scheme. Finally, the optimal jig and fixture design scheme was obtained by the proposed method.

Key words: jig and fixture design scheme, location, clamping, grey number, technique for order preference by similarity to ideal solution(TOPSIS), evaluation