加工中心床身尺寸元结构方法的优化研究
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摘要
针对某加工中心床身结构特点及性能要求,采用有限元理论中Block Lanczos法对其进行模态分析,经分析得出一阶模态振型为立柱侧的床身沿Y方向上下摆动;二阶模态振型为沿Z方向前后摆动;三阶模态振型为在XOZ平面内床身整体发生扭曲变形;四阶模态振型为在XOZ平面内床身整体发生扭曲变形。之后对加工中心床身尺寸元结构的优化进行了研究,在床身基本尺寸不变的前提下,以加工中心床身尺寸元结构的固有频率为优化目标,提出了加工中心床身结构的改进方案,并最终通过分析确定了加工中心床身相应元结构的最优方案,即在加工中心床身结构质量减小的情况下,动态性能得到改善,此筋格的元结构尺寸优化是有效的。
Aiming at the structural characteristicsand performance requirements of one machining centerlathe bed,the pattern analysis is carried out using Block Lanczos of finite element method theory,through the analysis of thepattern for the column side of the bed along the Y direction of the swing up and down;two modes for swinging along the Z direction front and back;the three order pattern type in the XOZ plane the whole lathebed distorted;four modes in the XOZ plane the whole lathebed distorted. After optimization of machining centerlathe bedbased on unit structure was studied with the same basic theory,the size of the bed,the natural frequency of machining center bed size structure as the target of optimization improved structure of machining center,and finally through the analysis to determine the optimal scheme of machining center corresponding unit structure,which decreases in the quality of machining center bed structure under the condition of moving state performance is improved,and the optimization of the dimension of the unit structure is effective.
Aiming at the structural characteristicsand performance requirements of one machining centerlathe bed,the pattern analysis is carried out using Block Lanczos of finite element method theory,through the analysis of thepattern for the column side of the bed along the Y direction of the swing up and down;two modes for swinging along the Z direction front and back;the three order pattern type in the XOZ plane the whole lathebed distorted;four modes in the XOZ plane the whole lathebed distorted. After optimization of machining centerlathe bedbased on unit structure was studied with the same basic theory,the size of the bed,the natural frequency of machining center bed size structure as the target of optimization improved structure of machining center,and finally through the analysis to determine the optimal scheme of machining center corresponding unit structure,which decreases in the quality of machining center bed structure under the condition of moving state performance is improved,and the optimization of the dimension of the unit structure is effective.
引文
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[10]陈琨,谭清河,杨培林.高速车床花岗岩与铸铁床身动静态性能的对比分析[J].机械设计与制造,2011(12):177-179.(Chen Kun,Tan Qing-he,Yang Pei-lin.Comparison analysis of high speed lathe granite and iron bed dynamic static performance[J].Journal of Mechanical Design and Manufacturing,2011(12):177-179.)
[2]张祥雷,姚博世,冮铁强.五轴数控磨床床身结构分析与优化[J].机床与液压,2012,40(15):18-22.(Zhang Xiang-lei,Yao bo-shi,Jiang Tie-qiang.Analysis and optimization of bed structure of five axis CNC grinding machine[J].Machine and Hydraulic,2012,40(15):18-22.)
[3]曹力,钟建林.基于ANSYS Workbench的床身材质对机床动力学特性影响的分析[J].组合机床与自动化加工技术,2015(2):61-64.(Cao Li,Zhong Jian-lin.Based on ANSYS Workbench of the bed material influence on the dynamic characteristics of the machine tool analysis[J].Modular machine tool&automatic processing technology,2015(2):61-64.)
[4]Lopez de Lecalle L N,Lamkiz A.Machine tools for high performance machining[M]GER:Springer,2009.
[5]陈瑜,魏俊,王云霞.树脂机床床身结构的静动态性能分析[J].南京工程学院学报,2016(2):49-52.(Chen Yu,Wei Jun,Wang Yun-xia.The static and dynamic analysis of machine bed resin structure[J].Journal of Nanjing Institute of Technology,2016(2):49-52.)
[6]裘卓明,江余岳,胡雅琴.大型机床床身导轨的制造工艺改进[J].精密制造与自动化,2016(2):58-61.(Qiu Zhuo-ming,Jiang Yu-yue,Hu Ya-qin.Improved manufacturing technology of large machine tool bed[J].Precision Manufacturing and Automation,2016(2):58-61.)
[7]Jung Do Suh,Dai Gil Lee.Design and manufacture of hybrid polymer concrete bed for high-speed CNC milling machine[J].Journal of Mechanics Science,2008(4):113-121.
[8]Eberard Adele,Madhu Munirathnam.Dynamic behaviors of protective covers in machine tools[J].Production Engineering-Research and Development,2007(1):199-204.
[9]宋宇,丁晓红,张横.机床床身结构综合优化设计技术[J].制造技术与机床,2016(1):73-77.(Song Yu,Ding Xiao-hong,Zhang Heng.Comprehensive optimization of design technology about machine tool bed structure[J].Manufacturing Technology and Machine Tool,2016(1):73-77.)
[10]陈琨,谭清河,杨培林.高速车床花岗岩与铸铁床身动静态性能的对比分析[J].机械设计与制造,2011(12):177-179.(Chen Kun,Tan Qing-he,Yang Pei-lin.Comparison analysis of high speed lathe granite and iron bed dynamic static performance[J].Journal of Mechanical Design and Manufacturing,2011(12):177-179.)