Topology Analysis and Multi-objective Optimization Design of VX380T CNC Machining Center Worktable
-
摘要: 为使VX380T数控加工中心工作台同时具有优越的静、动态性能和轻量化特点。利用拓扑分析的方法研究工作台截面的最佳载荷传递路径,依据拓扑分析结果设计了工作台的加强筋布局。将新结构工作台的整体质量和最大频响幅值为目标函数,以各加强筋的结构参数为设计变量,以原始工作台的静态性能和前3阶固有频率为约束条件进行多目标参数优化设计。对参数优化后工作台的质量、静动态性能进行对比分析,结果表明,其质量减轻了12.19%的同时,其静动态性能也得到了显著提高,证明了优化设计的可行性和有效性。Abstract: In order to make the VX380T CNC machining center worktable have superior static performance, dynamic performance and lightweight features, the optimal load transfer path of the worktable section was studied by the method of topological analysis. Based on the analysis results of the topology, the stiffener layout of the worktable was designed. A multi-objective parameter optimization of the redesigned worktable was carried out. The mass and harmonic response amplitude of the new worktable are taken as optimization objectives, the structural parameters ware taken as design variables, and the static performance and the natural frequencies of the original worktable was constraint condition. Comparing the optimized design result with the original one, the result showed that the worktable mass reduces by 12.19%, and the static and dynamic performance can be improved simultaneously. The feasibility and validity of optimal design are proved.
-
Key words:
- worktable /
- lightweight /
- static performance /
- dynamic performance /
- topological analysis /
- parameter optimization
-
表 1 固有频率
阶数 1 2 3 频率/Hz 2 261.4 2 494.5 2 904.5 表 2 设计变量的优化区间
变量 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 下限 5 125 105 5 6 10 5 10 30 20 5 上限 15 130 115 25 40 30 20 40 60 40 15 初值 5 130 115 10 12 20 10 30 40 20 10 表 3 优化后各变量结果
P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 5.3 129.4 109.5 8.4 24.1 17.3 9.7 28.4 37.7 23.5 7.1 表 4 优化前后频率对比
阶数 优化前频率/Hz 优化后频率/Hz 变化率/% 1 2 261.4 2 624.8 +16.07 2 2 494.5 2 832.5 +13.55 3 2 904.5 3 650.2 +25.67 表 5 最大振幅及减小率
名称 X轴 Y轴 Z轴 优化前振幅/μm 38.765 45.057 8.915 3 优化后振幅/μm 26.18 15.539 8.154 9 减小率/% -32.46 -65.51 -8.53 -
[1] 于英华, 孙苗苗, 徐平, 等.BFPC数控车床斜床身拓扑优化设计及其性能分析[J].机械科学与技术, 2018, 37(7):1034-1040 doi: 10.13433/j.cnki.1003-8728.2018.0706Yu Y H, Sun M M, Xu P, et al. Topological optimization design and performance analysis of BFPC oblique bed CNC lathe[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(7):1034-1040(in Chinese) doi: 10.13433/j.cnki.1003-8728.2018.0706 [2] 巫修海, 马云芳, 张建润.高速高精度卧式加工中心动态优化设计[J].振动与冲击, 2009, 28(10):74-77 doi: 10.3969/j.issn.1000-3835.2009.10.014Wu X H, Ma Y F, Zhang J R. Dynamic optimization design of a high-speed and high-precision HMC[J]. Journal of Vibration and Shock, 2009, 28(10):74-77(in Chinese) doi: 10.3969/j.issn.1000-3835.2009.10.014 [3] Cheng Q, Zhao H W, Zhao Y S, et al. Machining accuracy reliability analysis of multi-axis machine tool based on Monte Carlo simulation[J]. Journal of Intelligent Manufacturing, 2018, 29(1):191-209 doi: 10.1007/s10845-015-1101-1 [4] 鄢威, 张华, 江志刚, 等.面向节能高效需求的数控加工系统多目标优化模型[J].中国机械工程, 2018, 29(21):2571-2580 doi: 10.3969/j.issn.1004-132X.2018.21.009Yan W, Zhang H, Jiang Z G, et al. Multi-objective optimization model faced to demands of energy saving and high efficiency for CNC machining systems[J]. China Mechanical Engineering, 2018, 29(21):2571-2580(in Chinese) doi: 10.3969/j.issn.1004-132X.2018.21.009 [5] 孙晓东, 张涛, 刘苹, 等.铣削能耗建模及优化研究综述[J].天津职业技术师范大学学报, 2017, 27(4):38-42 http://d.old.wanfangdata.com.cn/Periodical/tjzyjssfxyxb201704008Sun X D, Zhang T, Liu P, et al. Review of modeling and optimization of milling energy consumption[J]. Journal of Tianjin University of Technology and Education, 2017, 27(4):38-42(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/tjzyjssfxyxb201704008 [6] Lv J X, Tang R Z, Jia S, et al. Experimental study on energy consumption of computer numerical control machine tools[J]. Journal of Cleaner Production, 2016, 112:3864-3874 doi: 10.1016/j.jclepro.2015.07.040 [7] 魏香林.机械加工制造过程能量传输模型分析与能耗优化研究[J].机械设计与制造工程, 2018, 47(10):80-85 http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jxsjyzzgc201810020Wei X L. Analysis on the energy transfer model and optimization of energy consumption in machining process[J]. Machine Design and Manufacturing Engineering, 2018, 47(10):80-85(in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jxsjyzzgc201810020 [8] 于英华, 沈佳兴, 阮德灵, 等.泡沫铝填充结构机床工作台结构优化设计[J].机械设计, 2014, 31(11):52-55 http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jxsj201411013Yu Y H, Shen J X, Nguyen D L, et al. Optimal design of machine tool filled with foam aluminum[J]. Journal of Machine Design, 2014, 31(11):52-55(in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jxsj201411013 [9] 徐平, 杨昆, 于英华.泡沫铝/环氧树脂填充结构机床工作台的模拟研究[J].兵器材料科学与工程, 2013, 36(1):70-73 doi: 10.3969/j.issn.1004-244X.2013.01.023Xu P, Yang K, Yu Y H. Simulation research on machine worktable filled with foam aluminum/epoxy resin[J]. Ordnance Material Science and Engineering, 2013, 36(1):70-73(in Chinese) doi: 10.3969/j.issn.1004-244X.2013.01.023 [10] 张功学, 王德雨, 朱卓.立式加工中心工作台仿生布筋设计与静刚度研究[J].制造技术与机床, 2017(9):104-108 http://d.old.wanfangdata.com.cn/Periodical/zzjsyjc201709027Zhang G X, Wang D Y, Zhu Z. Study on static stiffness and the design of bionic rib arrangement for vertical machining center[J]. Manufacturing Technology & Machine Tool, 2017(9):104-108(in Chinese) http://d.old.wanfangdata.com.cn/Periodical/zzjsyjc201709027 [11] 张希峰, 高东强, 王伟, 等.机床工作台动态特性分析及优化[J].制造技术与机床, 2015(4):119-122 doi: 10.3969/j.issn.1005-2402.2015.04.031Zhang X F, Gao D Q, Wang W, et al. Dynamic characteristic analysis and optimization of machine tool worktable[J]. Manufacturing Technology & Machine Tool, 2015(4):119-122(in Chinese) doi: 10.3969/j.issn.1005-2402.2015.04.031 [12] Liu S H, Guo Z Z, Chen Z S. Finite-element analysis and structural optimization design study for cradle seat of CNC machine tool[J]. Journal of the Chinese Institute of Engineers, 2016, 39(3):345-352 doi: 10.1080/02533839.2015.1112248 [13] 吴凤和, 史红亮, 许晓鹏, 等.基于功能截面分解的大型横梁拓扑优化[J].中国机械工程, 2016, 27(10):1344-1352 doi: 10.3969/j.issn.1004-132X.2016.10.011Wu F H, Shi H L, Xu X P, et al. Topology optimization of large crossbeam based on decomposition of functional sections[J]. China Mechanical Engineering, 2016, 27(10):1344-1352(in Chinese) doi: 10.3969/j.issn.1004-132X.2016.10.011 [14] 殷雪艳.精密切削加工技术[M].北京:北京理工大学出版社, 2013Yin X Y. Precision cutting technology[M]. Beijing:Institute of Technology Press, 2013(in Chinese) [15] Gao Z, Zhang D. Performance analysis, mapping, and multiobjective optimization of a hybrid robotic machine tool[J]. IEEE Transactions on Industrial Electronics, 2015, 62(1):423-433 doi: 10.1109/TIE.2014.2327008