Abstract
It is necessary to control every key process to make sure the output quality of final product is stability. Because there existing many fluctuating factors during multistage manufacturing processes, it is inevitable lead to numerous manufacturing defects, which would make the quality of final product at risk. In this paper, a model about processing defect risk was proposed to measure the quality of products, which was associated with multistage machining allowance. Then, it was used to optimize machining allowance distribution program of multistage manufacturing process. A machining example of slide valve & sleeve matching parts was presented to verify the rationality of this model.
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