大型机床床身热变形及其结构优化  

Thermal deformation and structure optimization on a large machine bed

作　　者：徐化文[1] 

机构地区：[1]四川工程职业技术学院车辆工程系,四川德阳618000

出　　处：《锻压技术》2017年第5期81-85,共5页Forging & Stamping Technology

基　　金：四川省教育厅科研资助项目(16ZB0495)

摘　　要：在采用Pro/Engineer软件建立大型床身三维几何模型的基础上,运用Pro/Mechanica模块对该模型进行了热变形有限元分析,获得了热平衡状态下的床身温度场分布情况以及床身沿Y、Z方向的热变形量。依据分析结果,对床身的内部结构进行优化并增添外部冷却装置,然后再次进行热变形有限元分析和效果验证。在以上研究的基础上,进行了床身温升与热变形实验。研究结果表明,有限元分析值与检测值一致性较佳,经过优化设计的床身热变形量明显减小,既有效提升了工作效率,又降低了生产成本,使机床精度进一步提升。The three-dimensional geometric model of large machine bed was established by Pro/Engineer, and then the finite element analysis of thermal deformation was carried out by Pro/Engineer module. Therefore, both the distribution of temperature field for the machine bed under the thermal equilibrium state and the amount of thermal deformation for the machine bed along the Y and Z directions were obtained. The internal structure of the machine bed was optimized and an external cooling device was added based on the analysis result. Furthermore, a finite element analysis of thermal deformation was performed again, and the effect was verified once again. Based on the research above, the machine bed temperature rise and thermal deformation experiments were carried out. The results show that the values of finite element analysis and the detection are in good consistency, and the heat deformation of the machine bed designed by optimization is significantly reduced. With the improved working efficiency and the reduced production cost, the accuracy of machine is further improved.

关 键 词：大型床身 热变形 有限元分析 PRO/ENGINEER 机床精度 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]