基于COMSOL的加工中心热结构耦合仿真分析
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摘要
目的对TX1600G加工中心镗床系统进行热结构耦合仿真分析,得到镗床系统的温度变化和变形规律,并验证仿真结果的正确性.方法应用SolidWorks软件进行三维实体建模,并与COMSOL Multiphysics通过接口连接,确定热边界条件,建立仿真模型,进行热结构耦合分析,并与实验数据进行对比.结果系统达到热平衡状态时,最高温度为21.9℃,发生在主轴后轴承处,主轴前端面中心点的总位移为39.29μm,X方向位移分量为4μm,Y方向为12μm,Z方向为37.2μm.仿真得到的温度变化曲线、最高温度、位移量和位移方向与实验结果基本一致,基本反映出实验测得的情况.结论应用COMSOL对加工中心进行热结构耦合研究,得到的平衡状态温度分布和位移分布能够有效地反映实际情况,可以为加工中心的优化设计提供理论依据.
The temperature variation and deformation rules of the boring system was obtained by thermal structural coupling analysis on TX1600 G machining center,and the results were verified by compared with experimental data.SolidWorks software was used for 3 D solid modeling,and it was connected with COMSOL Multiphysics,a multiphysics coupling simulation software.The thermal boundary conditions were determined.The maximum temperature is 21.9 ℃,which occurs at the rear bearing of the main shaft inside the ram,when the system reaches the thermal equilibrium state.The total displacement of the center point of the spindle front surface is 39.29 μm,the displacement in the X direction is 4 μm,Y 12 μm,and Z 37.2 μm.The results of simulation were basically consistent with the experimental results.COMSOL can conduct thermal structural coupling research on the machining center to provide theoretical basis for the optimal design of the machining center.
The temperature variation and deformation rules of the boring system was obtained by thermal structural coupling analysis on TX1600 G machining center,and the results were verified by compared with experimental data.SolidWorks software was used for 3 D solid modeling,and it was connected with COMSOL Multiphysics,a multiphysics coupling simulation software.The thermal boundary conditions were determined.The maximum temperature is 21.9 ℃,which occurs at the rear bearing of the main shaft inside the ram,when the system reaches the thermal equilibrium state.The total displacement of the center point of the spindle front surface is 39.29 μm,the displacement in the X direction is 4 μm,Y 12 μm,and Z 37.2 μm.The results of simulation were basically consistent with the experimental results.COMSOL can conduct thermal structural coupling research on the machining center to provide theoretical basis for the optimal design of the machining center.
引文
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[17] FANG B,GU T,YE D,et al.An improved thermo-mechanical model for vertical machining center[J].The international journal of advanced manufacturing technology,2016,87(9/12):2581-2592.
[18] LI Y,ZHAO W,LAN S,et al.A review on spindle thermal error compensation in machine tools[J].International journal of machine tools and manufacture,2015,95:20-38.
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[20] 谢黎明,刘征文,靳岚,等.整机热变形中测温点优化选择方法的研究[J].组合机床与自动化加工技术,2013(2):61-63.(XIE Liming,LIU Zhengwen,JIN Lan,et al.Research on optimization selecting of temperature measurement points in compound machining center thermal deformation[J].Combined machine tools and automated processing technology,2013(2):61-63.)
[2] WANG L,WANG H,LI T,et al.A hybrid thermal error modeling method of heavy machine tools in z-axis[J].International journal of advanced manufacturing technology,2015,80(1-4):389-400.
[3] CUI L Y,ZHANG D W,GAO W G,et al.Thermal errors simulation and modeling of motorized spindle[J].Advanced materials research,2011,154-155:1305-1309.
[4] ZHANG H,YANG J,ZHANG Y,et al.Measurement and compensation for volumetric positioning errors of CNC machine tools considering thermal effect[J].The international journal of advanced manufacturing technology,2011,55(1-4):275-283.
[5] 付世欣.力热作用下机械结合面物理参数表征研究[D].武汉:华中科技大学,2013.(FU Shixin.Research on mechanical parameter characterization of mechanical joints under force and heat[D].Wuhan:Huazhong University of Science and Technology,2013.)
[6] DENG X,FU J,CHEN Z.Thermal-structure characteristics coupling analysis and optimisation for horizontal CNC machining centre spindle[J].International journal of materials & structural integrity,2014,8(4):257.
[7] 俞圣梅,吴梅英.数控机床的精度与温度[J].世界制造技术与装备市场,2009(1):96-99.(YU Shengmei,WU Meiying.Precision and temperature of CNC machine tools[J].Manufacturing technology and equipment market,2009(1):96-99.)
[8] 仇健,刘启伟,李晓飞,等.卧式数控机床主轴温度场分布及对机床热变形的影响[J].制造技术与机床,2011(8):114-119.(QIU Jian,LIU Qiwei,LI Xiaofei,et al.Spindle temperature field distribution of horizontal CNC machine tool and its effect on thermal deformation of machine tool[J].Manufacturing technology & machine tool,2011(8):114-119.)
[9] 范开国.数控机床多误差元素综合补偿及应用[D].上海:上海交通大学,2012.(FAN Kaiguo.Comprehensive compensation and application of multiple error elements for CNC machine tools[D].Shanghai:Shanghai Jiaotong University,2012.)
[10] 邓小雷.数控机床主轴系统多物理场耦合热态特性分析研究[D].杭州:浙江大学,2014.(DENG Xiaolei.Research on multi-field coupling thermal characteristics of spindle system of CNC machine tools[D].Hangzhou:Zhejiang University,2014.)
[11] 孙军,孔碧溪,张祥,等.镗铣加工中心主轴系统热误差测量实验研究[J].沈阳建筑大学学报(自然科学版),2017,33(6):1107-1115.(SUN Jun,KONG Bixi,ZHANG Xiang,et al.Experimental study on thermal error measurement of spindle system of boring and milling machine[J].Journal of Shenyang jianzhu university(natural science),2017,33(6):1107-1115.)
[12] KIM D H,SONG J Y.Development of thermal deformation compensation device and CNC based real-time compensation for advanced manufacturing[J].International journal of automotive technology,2013,14(3):423-428.
[13] DU Z C,YAO S Y,YANG J G.Thermal behavior analysis and thermal error compensation for motorized spindle of machine tools[J].International journal of precision engineering and manufacturing,2015,16(7):1571-1581.
[14] UHLMANN E,HU J.Thermal modelling of a high speed motor spindle[J].Procedia cirp,2012,1(1):313-318.
[15] CREIGHTON E,HONEGGER A,TULSIAN A,et al.Analysis of thermal errors in a high-speed micro-milling spindle[J].International journal of machine tools and manufacture,2010,50(4):386-393.
[16] LIU Q,YAN J,PHAM D T,et al.Identification and optimal selection of temperature-sensitive measuring points of thermal error compensation on a heavy-duty machine tool[J].The international journal of advanced manufacturing technology,2016,85(1-4):345-353.
[17] FANG B,GU T,YE D,et al.An improved thermo-mechanical model for vertical machining center[J].The international journal of advanced manufacturing technology,2016,87(9/12):2581-2592.
[18] LI Y,ZHAO W,LAN S,et al.A review on spindle thermal error compensation in machine tools[J].International journal of machine tools and manufacture,2015,95:20-38.
[19] 侯淑娟,许立亭,唐其寿,等.卧式铣镗床检验条件精度检验第2部分:台式机床:GB/T 5289.2—2000 [S].北京:国家质量技术监督局,2000.(HOU Shujuan,XU Liting,TANG Qishou,et al.Test conditions for boring and milling machines with horizontal spindle-Testing of the accuracy Part 2:table-type machines:GB/T 5289.2—2000 [S].Beijing:State Administration for Market Regulation,2000.)
[20] 谢黎明,刘征文,靳岚,等.整机热变形中测温点优化选择方法的研究[J].组合机床与自动化加工技术,2013(2):61-63.(XIE Liming,LIU Zhengwen,JIN Lan,et al.Research on optimization selecting of temperature measurement points in compound machining center thermal deformation[J].Combined machine tools and automated processing technology,2013(2):61-63.)