基于模态分析的数控内齿强力珩齿机床身优化设计  

Optimization design of CNC gear honing machine tool bed based on modal analysis

作　　者：李文浩 夏链[1] 袁彬 韩江[1] LI Wenhao;XIA Lian;YUAN Bin;HAN Jiang(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2018年第11期1446-1450,1465,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家科技重大专项资助项目(2013ZX04002051);国家自然科学基金资助项目(51575154)

摘　　要：数控内齿强力珩齿机是一种高效、高精度的齿轮加工机床,床身是整机的重要基础件,提高床身的动态特性对保障珩齿机的加工精度有重要意义。文章通过有限元软件建立了床身的有限元模型,并通过模态分析得到床身的前4阶模态频率和振型;对床身进行了模态试验,并通过整体多项式拟合法得到床身的前4阶试验模态参数,通过对比模态试验和仿真结果验证了有限元模型的正确性;在仿真分析和模态试验的基础上,提出了2种床身结构优化方案,并再次通过模态分析得到最佳的优化方案;最终,在保证床身质量变化较少的前提下将床身的一阶固有频率从178.33Hz增加到203.14Hz,为床身的结构优化设计提供了一定的理论依据。CNC gear honing machine is a kind of high efficiency and high precision gear cutting machine tool. The bed is the important foundation of the whole machine. Improving the dynamic characteristics of the bed has important significance for ensuring the precision of gear honing machine. In this paper, the simulation model of the bed was established and the first four order modal frequencies and vi bration modes of the bed were gained with the aid of ANSYS. Global polynomial fitting method was used to obtain the first four order experimental modal parameters of the bed in the modal test. The re suits were compared with the simulation ones to verify the validity of the finite element model. Two kinds of bed structure optimization schemes were proposed on the basis of the simulation analysis and the modal test. The best scheme was found by using the modal test again. It was shown that the first order natural frequency of the bed increased from 178. 33 Hz to 203. 14 Hz with the lesser quality change of the bed. This study could provide a theoretical basis for the structure optimization of the gear honing machine tool bed.

关 键 词：数控内齿强力珩齿机 床身 模态分析 模态试验 结构优化 

分 类 号：TH113.1[机械工程—机械设计及理论]