关键词: 夹具设计, 数字孪生, 高保真模型, 动态感知数据

Abstract: To meet the requirements of clamping and positioning in the cutting of precision parts,and to support the rapid modification design of fixtures,the rapid design and performance tracking system of fixtures based on digital twins were researched and established.A high-fidelity model of the fixture-workpiece system was established based on the digital twin theory.The definition included a fixture composition model based on ontology technology,a structural model based on design theory,and an accuracy model based on Skin Model Shapes (SMS) to support rapid fixtures Modified design.Tracking the vibration data and surface quality data of the fixture during the cutting process,a dynamic perception data set was formed,and the simulation of fixture assembly accuracy and the prediction of clamping stability were realized.Through the establishment of fixture rapid design and performance tracking prototype system,the usefulness of the fixture digital twin model was verified,and the clamping stability and positioning accuracy of precision parts cutting processing under a long life cycle were realized.

Key words: fixture design, digital twin, high-fidelity model, dynamic sensing data