摘要
研究切削加工过程中工件-夹具系统的刚度计算方法及变形加工误差.运用经典Hertz接触理论和有限元方法,基于切削加工中工件的准静态受力分析,提出工件-夹具系统刚度计算的新方法,建立了基于工件-夹具系统刚度的工件加工误差预报模型.该方法避免了有限元计算中接触分析的使用,无需多次非线性迭代计算,减少了计算时间.
Workpiece-fixture stiffness and machining errors are studied. Based on the quasi static force analysis of workpiece,a new method to compute the stiffness of workpiece-fixture system is presented. The classic Hertz contact theory and finite element method(FEM) are made use of, yet the contact analysis in FEM and multi-nonlinear calculations are avoided. A model to predict workpiece machining errors based on the deformation of workpiece-fixture system is provided. In this way much of the time of calculation can be cut down.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2004年第12期1041-1044,1057,共5页
Transactions of Beijing Institute of Technology
基金
国家部委预研项目(041318.13.1)
关键词
工-夹系统
刚度计算
有限元方法
加工误差
workpiece-fixture system
stiffness computation
FEM method
machining errors
