Multistage machining processes variation propagation analysis based on machining processes weighted network performance

Abstract

To quantitatively analyze variation propagation in multistage machining processes, a method of variation propagation analysis and variation source identification based on manufacturing cost was proposed in this paper. With the method, a weighted network of multistage machining processes based on complex network theory was introduced, and variation propagation stability of multistage machining processes was analyzed by virus-spreading model. Furthermore, key process in critical path of variation propagation was identified by performance index analysis, and key process variation source in critical path of variation propagation was identified by state space model. Finally, a case study for applicability was presented. The result showed that the proposed method was available and can provided guidance for variation source compensation and support for product reliability in multistage machining processes.