关键词: 工艺路线, STEP-NC, 特征加工, 激励

Abstract: To solve the difficult problem of processing constraints in STandard for the Exchange of Product data Numerical Control (STEP-NC) non-linear process route,based on the characteristics oriented to manufacturing features of STEP-NC,the nonlinear process route planning method of manufacturing features stimulation selection sort was proposed.The processing scheme of manufacturing features was confirmed with selective principles of processing scheme,which was used to decompose the manufacturing features with multi-processing operations.Aiming at the machining interference might existed in interacting features,the methods of rigid priority sequence constraint based on features partition were proposed.The rigid constraint problems of machining operation were translated into the processing order problem of manufacturing feature,and the flexible constraint from fixtures and tools was translated into the corresponding manufacture feature set.Through the operations such as excitation,selection and dynamic updating for feasible features in different manufacture feature set,the nonlinear process route was generated.The feasibility and effectiveness of the nonlinear process route excitation generation method was verified by an example,and the problems of process constrained rules and knowledge representation were better solved with this method.

Key words: process route, standard for the exchange of product data numerical control, feature machining, excitation