推料机构凸轮轮廓曲线设计仿真及误差分析

摘要

应用ADAMS软件,根据执行件轨迹要求对水果套网机推果机构凸轮轮廓进行设计及误差分析.经过ADAMS的正动力学和逆动力学功能计算得到从动件相对于凸轮回转中心的位置曲线,利用反转法和ADAMS的create tracespline功能,得到了凸轮的轮廓曲线.仿真得到执行件的位移、速度、加速度曲线,与理论值对比表明求解出的凸轮轮廓满足轨迹要求,且误差很小,并分析了出现误差的原因.该凸轮轮廓求解方法适用于其它轨迹要求的设计,为方便、快捷、高精度地设许出凸轮轮廓曲线找到了一种方法.%According to the requirement of the end-effectors,the cam profile of pushing mechanism of fruit net machine was designed and error analysis was analyzed based on ADAMS.The position curve of the follower with respect to the center of the cam follower was obtained by using the positive and inverse dynamics of ADAMS.The cam contour curve was obtained by the inversion method and the create trace spline function of ADAMS.The displacement,velocity and acceleration curve of the end-effectors were obtained.Compared with the theoretical value,the results showed that the cam profile meet the requirements of the trajectory,and the error was very small,and the causes of the error were analyzed.The cam contour method is suitable for the design of other trajectory,the method of design of cam profile curve with convenient,quick and high accuracy is obtained.