对称性凸轮机构从动件升程廓线多项式运动规律的参数化研究

发布时间：2018-06-09 21:17

本文选题：凸轮廓线 + 位移曲线　；参考：《机械传动》2016年08期

【摘要】：针对仅考虑边界条件的传统多项式运动规律的最大类速度和最大类加速度偏大的问题,通过研究具有最小加速度的凸轮类位移曲线、一次映射类速度图及二次映射类加速度图,把凸轮机构从动件升程廓线分为两段单凸的样条曲线,在样条边界点上找出影响加速度曲线的敏感参数,并在样条曲线上找到一个控制加速度曲线的敏感控制点,采用数形结合的方法建立对称性凸轮机构从动件升程廓线多项式运动规律参数化模型。通过该模型能获得不同条件下的最优标准位移方程,并以此作为凸轮从动件升程运动规律曲线,设计者只需要根据确定的推程角和升程,便可方便的设计出满足从动件升程加速度最小的凸轮廓线。
[Abstract]:Aiming at the problem of the maximum class velocity and the maximum acceleration of the traditional polynomial motion law which only consider the boundary condition, the cam displacement curve with minimum acceleration, the first order mapping velocity graph and the quadratic mapping type acceleration diagram are studied by studying the cam displacement curve with the minimum acceleration, the first order mapping velocity graph and the quadratic mapping type acceleration graph. The lifting profile of follower of cam mechanism is divided into two single convex spline curves. The sensitive parameters affecting the acceleration curve are found at the spline boundary point, and a sensitive control point is found on the spline curve to control the acceleration curve. A parameterized model of the motion law of lifting profile polynomial of the follower of symmetric cam mechanism is established by the combination of numbers and shapes. Through this model, the optimal standard displacement equation under different conditions can be obtained, which is regarded as the curve of the lift motion of cam follower. The designer only needs to determine the angle and lift of the cam follower. It is convenient to design the cam profile which can satisfy the minimum acceleration of the follower.
【作者单位】：河南科技大学车辆与交通工程学院;河南科技大学机电工程学院;
【基金】：河南省教育厅科学技术研究重点项目(13A460274) 河南科技大学青年科学基金(2014QN009)
【分类号】：TH112.2

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