Tolerance optimization design based on the manufacturing-costs of assembly quality

Tolerance design plays a major role in the quality of the product life cycle. Its purpose not only can ensure the products quality. At the same time, it monitors the product manufacturing costs. The traditional the tolerance design devotes to the optimization target of minimizing the manufacturing cost. But due to the manufacturing process of a product, there is a nonlinear relation between tolerance and cost. It disregards the problem of quality loss which cannot reach the effect of the high precision and low cost. Depending on the relationship between the manufacturing costs and tolerance, the tolerance optimization design method under the multiple correlation characteristic products is put forward, deducing the features related to quality of the product within multiple function relation between the loss and tolerance. Concentrating on the loss to the quality problems in the manufacturing process, manufacturing cost and quality loss tolerance model is created. The purpose is to improve product quality and reduce costs. Example results show that the product of multiple correlation characteristics of manufacturing cost and quality loss of tolerance optimization design model has certain validity, and compared with the traditional this tolerance design having great superiority. © 2015 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the organizing committee of 13th CIRP conference on Computer Aided Tolerancing.