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Uncertainty in the manufacturing process is the main factor affecting the quality consistency and application reliability of electromechanical products. How to improve the quality consistency of their batches through tolerance design technology has been the focus of domestic and foreign electromechanical product manufacturers. Although the traditional tolerance design method can improve the consistency of batch products, from the perspective of engineering applications, this optimization method may not be optimal, and it will cause unnecessary cost waste. In order to improve the quality consistency to the optimization goal and control the cost increase to the minimum, this paper proposes a tolerance design method based on the renewable cost contribution rate, which comprehensively considers the improvement of consistency when the tolerance values decrease and costs increase in a non-linear form, and tolerance optimization strategies are formulated. Finally, by applying it to the quality optimization of electromechanical products, the correctness of the proposed method is verified.

Optimization method of mechanical and electrical product quality consistency based on renewable cost contribution rate