Modelling of Variation Propagation for Multi-Operational Machining Processes Based on Perturbation Vectors
A new state space model of multi-operational machining processes is presented for dimensional variation propagation, transformation and accumulation based on perturbation vectors (PV). Taking perturbation vectors (PV) for state vectors of part geometric variaton and the fixture variations for input vectors, the perturbation homogeneous transformation (PHT) is applied to analyze and derivate datum-induced deviation, re-location deviation, fixture error and machining error, and a state space model of variation propagation in multi-operational complicated machining processes is developed. Furthermore, a three-operation machining process of cylinder is given to illustrate the method presented. With the results of calculation and simulation, it is verified that the proposed model is effective and useful.
Yusaku Fuji and Koichi Maru
Z.J. Wen et al., "Modelling of Variation Propagation for Multi-Operational Machining Processes Based on Perturbation Vectors", Applied Mechanics and Materials, Vol. 36, pp. 120-128, 2010