基于多重夹紧的工件-夹具间接触力的预测方法  

Prediction of workpiece-fixture contact forces based on multiple clamping

作　　者：秦国华[1] 王细洋[1] 吴铁军[1] 敖志强[1] 肖洁[1] 

机构地区：[1]南昌航空大学航空与机械工程学院,江西南昌330063

出　　处：《计算机集成制造系统》2008年第7期1421-1426,共6页Computer Integrated Manufacturing Systems

基　　金：航空科学基金资助项目(2006ZE56006);中国博士后科学基金资助项目(20070411142);国家自然科学基金资助项目(10676028);航空支撑制造技术研究基金资助项目(61901090104);江西省教育厅科学技术基金资助项目(2007-172);南昌航空大学科研基金资助项目(EA200503139)~~

摘　　要：在夹具设计过程中,工件-夹具之间的接触力是工件稳定性分析和加工精度估算的关键因素。为此,根据多重夹紧力对工件的作用过程,建立了接触力与多重夹紧力的大小、作用点以及夹紧顺序之间的接触力模型。基于总余能原理,提出了接触力模型的求解算法。最后通过典型实例,详细说明了接触力的分析预测过程。In fixture design, prediction of contact forces between workpiece and fixture was crucial to verify the workpiece stability and evaluate the machining accuracy. Therefore, according to the application of multiple clamping forces on the workpiece, the contact force model was firstly formulated to describe the relationships between the contact forces and the magnitude, placement and clamping sequence of multiple clamping forces. Then, based on the principles of the total complementary energy, the solution method for the contact force model was proposed, Finally, a detailed discussion was conducted to the prediction procedures of contact forces by using some practical examples.

关 键 词：夹具 工件 多重夹紧力 接触力 夹紧顺序 总余能 

分 类 号：TG75[金属学及工艺—刀具与模具]