MODE-BASED TOLERANCE ANALYSIS IN MULTI-STATION ASSEMBLY USING STREAM OF VARIATION MODEL

摘要

Modeling of variation propagation is crucial in predicting product dimensional quality and general performance of manufacturing systems. This paper develops a variation propagation model for multi-station assembly processes which can be applied for analysis of various tolerance modes. The variation propagation model generalizes the current state space approach based variation propagation method from 2D to 3D cases. Additionally, various tolerance modes can be included into the model based on GD&T standards and industrial applications. Thus, by using the developed variation propagation model, the variations on the measurements are directly calculated, instead of using the standard Monte Carlo simulations with large sample size. The results of the industrial case study show that the proposed model can accurately predict variation propagation in multi-station assembly process.