关键词: 公差分配, 加工成本, 能耗, 相对分布系数, 产品设计

Abstract: To optimize the tolerance design, a new method was proposed, in which the cost, energy consumption and waste during machining process were taken into consideration. The functional relationship between machining time and tolerance was proposed. Then three models were established, which were machining cost-tolerance model, the energy consumption-tolerance model and the waste-tolerance model. Based on consideration of relationship between tolerance and cost, energy consumption and waste, a multiple objectives tolerance optimization design model was established. To improve the computational accuracy of model, an iterative method was presented to calculate the relative distribution coefficient of closed loop, and the tolerance of each component was determined. An example was used to demonstrate the effectiveness of the proposed method.

Key words: tolerance allocation, machining cost, energy consumption, relative distribution coefficient, product design