一种考虑角速度波动的凸轮轮廓曲线修正方法  

A Correcting Method of Cam Profile Curve Taking into Angular Velocity Fluctuation

作　　者：金旭星[1] 

机构地区：[1]无锡职业技术学院机械系,江苏无锡214121

出　　处：《机械设计与制造》2013年第6期212-214,共3页Machinery Design & Manufacture

基　　金：江苏省首批高校优秀中青年骨干教师和校长境外研修计划项目资助

摘　　要：凸轮在工作过程中的角速度是波动的,因此按照常规的设计方法得到的轮廓曲线存在着偏差,影响了输出运动的精度。为对凸轮轮廓曲线进行修正,将电机的机械特性及各构件的弹性因素考虑在内,建立了机械系统的动力学方程,并采用四阶龙格库塔法求解非线性动力学微分方程,获取了凸轮角速度的波动规律,最后以实例进行修正方法的确认。结果表明,凸轮角速度的波动是多种因素影响的综合。在从动件的最大和最小极限行程位置,波动最剧烈。修正凸轮轮廓曲线时,应分别适度增大和减小轮廓向径。The angular velocity of the cam is fluctuant in the course of wark, thence there is a deviation in the profile curve for the general design methods, which affects the accuracy of the output movement. In order to correct the cam profile curve, firstly, the mechanical characteristics of the motor, and the flexibility of other components are taken into account, and a mechanical system dynamics equation is established, then the fourth-order runge-kutta method is utilized to solve nonlinear dynamic differential equation, and the regnlar pattern of the cam angular velocity fluctuation is obtained. Finally, an example is tested and the correcting method is confirmed. The results show that the angular velocity fluctuation of the cam is affected by a variety of factors. In the maximum and minimum limits of the stroke position for the follower member, the fluctuation is most volatile. While correcting the cam profile curve, the contour diameters should be moderately increased and reduced.

关 键 词：凸轮 轮廓曲线 角速度波动 修正 

分 类 号：TH16[机械工程—机械制造及自动化]