机床丝杠进给系统有限元热分析的热边界条件修正方法  

Correction Methods of Thermal Boundary Conditions for Thermal Analysis of Machine Tools' Ball-Screw Feeding System

作　　者：王万金[1] 王玲[1] 刘兴业[1] 殷国富[1] 

机构地区：[1]四川大学制造科学与工程学院,成都610065

出　　处：《组合机床与自动化加工技术》2013年第9期13-15,20,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家重大科技专项资助项目(SK201201A26-01);四川省科技支撑计划项目(2012GZ0007)

摘　　要：符合实际的热边界条件是机床有限元热分析获得准确结果的关键。以龙门加工中心X向丝杠进给系统为例,提出了一种基于实验数据的热边界条件修正方法。该方法利用Workbench多目标优化模块,以热边界条件为变量,以实验测量得到的丝杠上各点的温度值为目标,对计算得到的热边界条件进行修正。然后,在ANSYS经典环境中,以移动热源的形式施加修正后的边界条件,得出丝杠进给系统的瞬态温度场。最后,从有限元分析结果与实验结果的对比可以看出,该方法具有较高的准确性和实用价值。Practical thermal boundary conditions are the key for getting the right results of machine tools＇ thermal analysis. Taking the X directional ball screw feeding system of a Gantry Machining Center as an example, a method which uses experimental data to correct thermal boundary conditions got by the theory was proposed. Through the method, thermal boundary conditions were revised by taking thermal bounda- ry conditions and experimental data as variables and goals respectively in the multi-objective optimization module of workbench. Then, by exerting the corrected moving thermal loads, the transient temperature field of the ball screw feeding system was obtained in the classical environment of ANSYS. Finally, by comparing with the simulation result and the experimental data, the accuracy and validity of the method was proved.

关 键 词：热分析 滚珠丝杠 有限元仿真 热边界条件修正 

分 类 号：TH16[机械工程—机械制造及自动化] TG502.15[金属学及工艺—金属切削加工及机床]