基于CAE热分析的机床结构工作空间热误差建模  

Structural Thermal Error Modeling of Machine Tools in Working Space Based on CAE Thermal Analysis

作　　者：张大卫[1] 杨金玉[1] 高卫国[1] 张伟展[1] 刘腾[1] 牛文铁[1] 

机构地区：[1]天津大学装备设计与制造技术天津市重点实验室,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2016年第2期111-119,共9页Journal of Tianjin University：Science and Technology

基　　金：'高档数控机床与基础制造装备'科技重大专项资助项目(2013ZX04005-013)

摘　　要：在机床设计阶段,首先运用CAD软件建立几何模型;然后生成中间文件并导入CAE软件,进行机床结构热分析,通过后处理提取出运动轴导轨位置处的结构热变形误差;最后利用多体理论将结构热变形引起的单轴热误差转化为机床工作空间的热误差,进而预测由于机床结构热变形而引起的机床末端刀尖点-工件的相对位姿误差.仿真分析算例表明该方法具有可行性,对机床热平衡设计具有指导意义.In the design phase of machine tools, firstly, geometric models were constructed based on CAD platform. Secondly, the intermediate files were generated and transferred to CAE platform, and structural thermal analysis was processed; structural thermal errors of machine tools along guideways of moving-axis were gained by post-processing. Lastly, thermal errors in working space caused by structural thermal deformation of machine tools were obtained from thermal errors of each single moving axis with the aid of multi-body theory, so that relative posi- tion and posture errors of tip-workpiece caused by structural thermal deformation of machine tools could be pre- dicted. The simulation examples illustrate that this method is of feasibility and great value for thermal balance design of machine tools.

关 键 词：热分析 热误差 多体理论 工作空间 热平衡设计 

分 类 号：TH123[机械工程—机械设计及理论]