高速取纸机构主凸轮廓线设计及运动分析

在分析取纸过程执行件位置和姿态的基础上提出了双凸轮-四杆的组合机构,采用高阶多项式和圆弧组合曲线得到了具有高阶导数连续且绝对值较小的高速取纸机构主凸轮廓线方程,分别以主凸轮压力角和角加速度为目标对基圆半径和凸轮运动角进行了分析。结果表明,利用高阶多项式和圆弧组合曲线作为主凸轮廓线方程能够满足高速取纸机构执行件的位姿要求;适当的基圆半径和凸轮运动角可以进一步降低凸轮压力角和角加速度。

Design and motion analysis of main cam of high speed paper picking mechanism

A double cam-four-bar combination mechanism was proposed based on the analysis of actuator position and attitude in paper-picking process.By using higher order polynomial and arc combination curve,the contour equation of the main drawing of high-speed paper-picking mechanism with higher order reciprocal continuity and smaller absolute value was obtained.The radius of base circle and the motion angle of cam were analyzed with the aim of pressure angle and angular acceleration of main cam.The results showed that using higher order polynomial and arc combination curve as the main cam contour equation could meet the requirements of the position and attitude of the high-speed paperpicking mechanism actuator.Appropriate radius of base circle and cam motion angle could further reduce the cam pressure angle and angular acceleration..