基于模态分析的智能三主轴加工中心结构优化  

Structure Optimization of Intelligent Three Spindle Machining Center Based on the Modal Analysis

作　　者：吕冬梅[1,2] 韩江[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]安徽交通职业技术学院汽车与机械工程系,合肥230051

出　　处：《组合机床与自动化加工技术》2015年第4期128-131,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家重大科技专项(2012ZX04001-021);国家自然科学基金(51275147);安徽省自然科学基金(KJ2013B069)

摘　　要：简单介绍了当前的实验模态分析的相关理论和方法,重点介绍LSCF(最小二乘复频域法)方法的理论知识;随后以智能三主轴加工中心整机为测试对象,采用LSCF方法(最小二乘复频域法)对三主轴加工中心进行了实验模态分析并对其结果进行分析。最后将实验结果和有限元模态分析结果进行对比;得出结论:主轴箱是薄弱环节,优化内筋板高度和侧筋板厚度尺寸;优化后的主轴箱x,y和z向最大变形率别下降了9.32%、7.89%和8.89%,证实模态分析方法具有可靠性。The theories and methods of the relevant experimental modal analysis simply are introduced,and the theory of LSCF method（ Poly-reference least squares complex frequency domain method） is introduced emphatically. Then three-spindle machining center is regarded as the test object,using the method of LSCF（ Poly-reference least squares complex frequency domain method） method. The experimental modal of the three-spindle machining center has been analyzed and the results have been arrived. Finally the experimental results are compared with the finite element modal analysis results. The Conclusion is that the spindle head is the most weak link of the machine has been confirmed. It is necessary to optimize inner rib plate height and side reinforcement plate thickness size. After optimization of the spindle box,the maximum deformation rate of x-axial direction,y-axial direction,and z-axial direction has fallen by 9. 32% 、7. 89% 和 8. 89% respectively,which confirms the modal analysis method has the reliability.

关 键 词：三主轴加工中心 实验模态分析 有限元分析 仿真结果 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]