关键词: 通用夹具, 基于状态变化的装夹, 主动寻位, 状态记忆

Abstract: The fixturing techniques advanced with the development of the industry. We introduced the concept of Reference Free Part Encapsulation(RFPE)，analyzed the advantages and weakness of RFPE fixturing， and discussed a new technique(Rapid Location and State Memory，RL&SM). RL&SM has solved the problems of location for arbitrarily shaped parts in phase change based fixturing， accessibility to the tool in machining in different directions for RFPE fixturing and blank drift. The location technique in RL&SM makes the accuracy of machining largely independent of the accuracy of the locating device tolerances.

Key words: universal fixture, phase-change-based fixturing, rapid location