关键词: 柔性夹具, 智能夹具元件, 装配模式, 工件本体

Abstract: To inherit and reuse the knowledge in flexible fixture design, and to enhance the efficiency and quality of fixture designs, knowledge engineering based flexible fixture design method was studied. The method converted traditional flexible fixture components into intelligent ones which could inherit and reuse design knowledge. The ontology model for geometry and process knowledge of flexible fixture components was established. The parametric feature modeling technology was utilized to build components geometric models on which functional and matching features were defined. The assembly modes among components and between components and workpieces were analyzed. The matching code was formed by defining convex-concave relationship of function and matching features. Workpiece's machining ontology model was established, and the layout design knowledge of ontology was applied to drive flexible fixture component intelligent designs. Intelligent flexible fixture component ontology model laid a foundation for realizing flexible fixture components'self-selection, self driven and self-assembly abilities.

Key words: flexible fixture, smart fixture unit, assembly mode, workpiece ontology