锻压技术

大型机床床身热变形及其结构优化

英文标题：Thermal deformation and structure optimization on a large machine bed

作者：徐化文

单位：四川工程职业技术学院

分类号：TH122

出版年,卷(期):页码：2017,42(5):81-85

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.

基金项目：

四川省教育厅科研资助项目（16ZB0495）

徐化文（1984-），男，硕士，讲师

参考文献：

［1］Wu H, Zhang H T, Guo Q J, et al. Thermal error optimization modeling and real-time compensation on a CNC turning center [J]. Journal of Materials Processing Technology, 2008, 207(1/3): 172-179.
［2］Bryan J. International status of thermal error research [J]. Annals of the CIRP, 1990, 39(2): 645-656.
［3］刘光辉，刘华，王伟钦，等.316L不锈钢压缩热变形行为及临界损伤值研究 [J]. 锻压技术，2016，41（2）：118-123.Liu G H，Liu H，Wang W Q，et al. Study on compressed thermal deformation behavior and critical damage value of stainless steel 316L [J]. Forging & Stamping Technology，2016，41（2）：118-123.
［4］毛春燕，刘晓燕.某大型锻造液压机组合机架整体性分析[J]. 锻压技术，2016，41（1）：89-92.Mao C Y，Liu X Y. Integration analysis on the assembled frame of large forging hydraulic press [J]. Forging & Stamping Technology，2016，41（1）：89-92.
［5］Zhao H T, Yang J G, Shen J H. Simulation of thermal behavior of a CNC machine tool spindle [J]. International Journal of Machine Tools and Manufacture, 2007, 47(6): 1003-1010.
［6］席奇豪，樊文欣，吕伟.对轮旋压的正交试验数值模拟[J].锻压技术，2016，41（8）：154-158.Xi Q H，Fan W X，Lyu W，et al. Optimization on power spinning parameters for connecting rod bushing based on grey relational degree [J]. Forging & Stamping Technology，2016，41（8）：154-158.
［7］国家自然科学基金委员会. 机械制造科学:冷加工[M]. 北京: 科学出版社, 1994.National Natural Science Foundation of China. Mechanical Manufacturing Science:Cold Working[M]. Beijing: Science Press,1994.
［8］龚伟, 汪中厚, 黄裕华，等. 基于Pro/MECHANICA的磨床床身有限元热变形分析[J]. 精密制造与自动化,2007,(3): 49-50.Gong W, Wang Z H, Huang Y H, et al. Pro/MECHANICA-based finite element analysis of thermal deformation of grinder bed [J]. Precision Manufacturing & Automation, 2007,(3): 49-50.
［9］李立新，周志峰，张涛. DB685钢的热变形行为及热加工图[J].锻压技术，2016，41（9）：126-129.Li L X，Zhou Z F，Zhang T. Heat deformation behavior and heat processing map of steel DB685 [J]. Forging & Stamping Technology，2016，41（9）：126-129.
［10］唐开勇. 机床床身导轨热变形及其模型的建立[J]. 现代机械, 2007,(1): 41-46.Tang K Y. The heating deformation of the slideway on the machine tool and several models of that[J].Modern Machinery, 2007,(1): 41-46.
［11］李郝林, 应杏娟, 迟玉伦. 机床导轨热误差优化计算中的近似模型方法[J]. 中国机械工程，2011，(2): 423-427.Li H L, Ying X J, Chi Y L. Optimal calculation for thermal errors of machine guide way with approximation model method [J]. China Mechanical Engineering, 2011, (2): 423-427.
［12］Kim S K, Cho D W. Real-time estimation of temperature distribution in a ball-screw system [J]. International Journal of Machine Tools and Manufacture, 1997, 37(4): 451-464.

服务与反馈：

【文章下载】【加入收藏】