经编机梳栉横移系统误差建模与仿真
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摘要
为研究经编机梳栉横移系统机械结构对横移误差的影响,基于赫兹接触理论计算了滚珠丝杠副的轴向刚度、双列角接触球轴承的轴向刚度和径向刚度、直线轴承和滚珠导套的径向刚度,同时考虑导纱梳栉、球铰和异形连接件的柔性,通过ANSYS和ADAMS软件进行刚柔耦合分析,获得了系统的横移误差。分别研究了导纱梳栉的质量和刚度对加固架驱动和重心驱动2种横移系统横移误差的影响。结果表明:横移误差主要由梳栉和异形连接件在偏转力矩下的弯曲变形以及梳栉和球铰在轴向推力下的压缩变形产生,减小梳栉的质量和增加梳栉的刚度均能减小系统的横移误差;重心驱动方式克服了梳栉在横移过程中产生的偏转力矩,从而减小了对梳栉刚度的要求。
In order to investigate the effects of mechanical structure on the transverse motion error of guide bar shogging system,firstly,the transverse motion error was obtained by the rigid-flexible coupling dynamic model by ANSYS and ADAMS software,considering the axial stiffness of ball screw,the axial and radial stiffness of angular contact ball bearings,the radial stiffness of linear bearings and guide bushings calculated by Hertz contact theory,and the flexibility of the guide bar,spherical hindge and special shape connection. Then,the effects of the mass and stiffness on the transverse motion errors of the guide bar shogging systems driven with the reinforcement and driven by the center of gravity were investigated. The results show that the transverse motion errors are generated mainly by the bending deformation of guide bar and the special shape connection caused by deflection moment and the compressive deformation of the guide bar and the spherical hinge caused by axial thrust,and the transverse motion error can be reduced by decreasing the mass and increasing the stiffness of the guide bar. Driven by the center of gravity can reduce the deflection moment,thereby reducing the requirement of the stiffness of the guide bar.
In order to investigate the effects of mechanical structure on the transverse motion error of guide bar shogging system,firstly,the transverse motion error was obtained by the rigid-flexible coupling dynamic model by ANSYS and ADAMS software,considering the axial stiffness of ball screw,the axial and radial stiffness of angular contact ball bearings,the radial stiffness of linear bearings and guide bushings calculated by Hertz contact theory,and the flexibility of the guide bar,spherical hindge and special shape connection. Then,the effects of the mass and stiffness on the transverse motion errors of the guide bar shogging systems driven with the reinforcement and driven by the center of gravity were investigated. The results show that the transverse motion errors are generated mainly by the bending deformation of guide bar and the special shape connection caused by deflection moment and the compressive deformation of the guide bar and the spherical hinge caused by axial thrust,and the transverse motion error can be reduced by decreasing the mass and increasing the stiffness of the guide bar. Driven by the center of gravity can reduce the deflection moment,thereby reducing the requirement of the stiffness of the guide bar.
引文
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[14]董亮,汤文成,刘立.滚珠丝杠进给系统混合建模及其振动时变性分析[J].振动与冲击,2013,32(20):196-202.DONG Liang,TANG Wencheng,LIU Li.Hybrid modeling and time-varying analysis of vibration for a ball screw drive[J].Journal of Vibration and Shock,2013,32(20):196-202.
[15]夏风林,葛明桥,蒋高明.高速经编机梳栉横移运动的优化设计[J].纺织学报,2009,30(5):118-121.XIA Fenglin,GE Mingqiao,JIANG Gaoming.Optimizing design of shogging motion of the guide bar on high speed warp knitting machine[J].Journal of Textile Research,2009,30(5):118-121.
[16]刘阳,李景奎,朱春霞,等.直线滚动导轨结合面参数对数控机床动态特性的影响[J].东北大学学报(自然科学版),2006,27(12):1369-1372LIU Yang,LI Jingkui,ZHU Chunxia,et al.Influence of linear rolling guide joint on dynamic behavior of NC machine tools[J].Journal of Northeastern University(Natural Science Edition),2006,27(12):1369-1372.
[2]殷明跃,夏风林,张琦,等.基于前馈控制的经编机横移系统高速定位[J].纺织学报,2011,32(11):126-130.YIN Mingyue,XIA Fenglin,ZHANG Qi,et al.Highspeed positioning of warp knitting machine shogging system based on feed forward control[J].Journal of Textile Research,2011,32(11):126-130.
[3]秦文,夏风林,张琦,等.基于速度控制模式的经编电子横移控制算法[J].纺织学报,2011,32(6):141-145.QIN Wen,XIA Fenglin,ZHANG Qi,et al.Control algorithm of electronic shogging system based on speed control mode in warp knitting[J].Journal of Textile Research,2011,32(6):141-145.
[4]郑宝平,蒋高明,夏风林,等.基于转矩控制模式的经编电子横移系统设计[J].纺织学报,2012,33(10):122-127.ZHENG Baoping,JIANG Gaoming,XIA Fenglin,et al.Design of electronic shogging system of warp knitting based on torque control mode[J].Journal of Textile Research,2012,33(10):122-127.
[5]刘念,夏风林,张琦,等.经编机梳栉横移机构的动力学分析[J].纺织学报,2012,33(11):121-126.LIU Nian,XIA Fenglin,ZHANG Qi,et al.Dynamic of analysis of shogging motion of mechanism of guide bar on warp knitting machine[J].Journal of Textile Research,2012,33(11):121-126.
[6]OLAVE Mireia,SAGARTZAZU Xabier,DAMIAN Jorge,et al.Design of four contact-point slewing bearing with a new load distribution procedure to account for structural stiffness[J].Journal of Mechanical Design,2010,132(2):1-10.
[7]GUMMER Alexander,SAUER Bernd.Influence of contact geometry on local friction energy and stiffness of revolute joints[J].Journal of Tribology,2012,134(2):390-392.
[8]朱坚民,张统超,李孝茹.基于结合部刚度特性的滚珠丝杠进给系统动态特性分析[J].机械工程学报,2015,51(17):72-82.ZHU Jianmin,ZHANG Tongchao,LI Xiaoru.Dynamic characteristic analysis of ball screw feed system based on stiffness characteristic of mechanical joints[J].Journal of Mechanical Engineering,2015,51(17):72-82.
[9]WANG Dazhong,LU Yan,ZHANG Tongchao,et al.Effect of stiffness of rolling joints on the dynamic characteristic of ball screw feed systems in a milling machine[J].Shock and Vibration,2015(1):1-11.
[10]MEGAHED S M,HAROUN A F.Analysis of the dynamic behavioral performance of mechanical systems with multi-clearance joints[J].Journal of Computational and Nonlinear Dynamics,2012(7):1-11.
[11]蒋书运,祝书龙.带滚珠丝杠副的直线导轨结合部动态特性研究[J].机械工程学报,2010,46(1):92-99.JIANG Shuyun,ZHU Shulong.Dynamic characteristic parameters of linear guideway joint with ball screw[J].Journal of Mechanical Engineering,2010,46(1):92-99.
[12]BREWE D E,HAMROCK B J.Simplified solution for elliptical-contact deformation between two elastic solids[J].Journal of Lubrication Technology,1997,99(4):485-487.
[13]程光仁,施祖康,张超鹏.滚珠螺旋传动设计基础[M].北京:机械工业出版社,1987:1-26.CHENG Guangren,SHI Zukang,ZHANG Chaopeng.Ball Screw Drive Design Basics[M].Beijing:China Machine Press,1987:1-26.
[14]董亮,汤文成,刘立.滚珠丝杠进给系统混合建模及其振动时变性分析[J].振动与冲击,2013,32(20):196-202.DONG Liang,TANG Wencheng,LIU Li.Hybrid modeling and time-varying analysis of vibration for a ball screw drive[J].Journal of Vibration and Shock,2013,32(20):196-202.
[15]夏风林,葛明桥,蒋高明.高速经编机梳栉横移运动的优化设计[J].纺织学报,2009,30(5):118-121.XIA Fenglin,GE Mingqiao,JIANG Gaoming.Optimizing design of shogging motion of the guide bar on high speed warp knitting machine[J].Journal of Textile Research,2009,30(5):118-121.
[16]刘阳,李景奎,朱春霞,等.直线滚动导轨结合面参数对数控机床动态特性的影响[J].东北大学学报(自然科学版),2006,27(12):1369-1372LIU Yang,LI Jingkui,ZHU Chunxia,et al.Influence of linear rolling guide joint on dynamic behavior of NC machine tools[J].Journal of Northeastern University(Natural Science Edition),2006,27(12):1369-1372.