Variation propagation modeling in multistage machining processes considering form errors and N-2-1 fixture layouts

Abstract Variation propagation modeling of multistage machining processes enables variation reduction by making an accurate prediction on the quality a part. Part through models, such as stream and Jacobian-Torsor often focus 3-2-1 fixture layout do not consider form errors. This paper derives mathematical model based dual quaternion for part given parts with errors fixtures N -2-1 ( >3) layout. The method uses techniques Skin Model Shapes quaternions virtual assembling fixture, well conducting measurement. To validate method, produced in two-stationed process 12-2-1 was considered. made following proposed within 0.4% using CAD/CAM simulation when were These results are neglected partially validated