关键词: 变型设计, 制造特征, 制造特征组合, 制造流程, 工时估算

Abstract: In order to solve the contradiction between accuracy and efficiency of the previous estimation methods for manufacturing time of similar parts, this paper proposes an easy-programming and high-precision method. Study how the manufacturing techniques influence the manufacturing time of manufacturing features and introduces the concept of manufacturing feature composite, based on this, develop five manufacturing time databases as production preparation database, feeding and blanking database, tool changing database, rough cutting database and finish cutting database. Propose the concept of manufacturing process chart and describes the drawing method. Estimating the manufacturing time of similar parts through changing the manufacturing process of historic part and using the data in the databases for calculation. The proposed estimation method is verified through the similar parts of one part family produced in a company.

Key words: variant design, manufacturing features, manufacturing feature composite, manufacturing process, manufacturing time estimation