高速凸轮摆杆机构参数化设计技术研究  

Research on parametric design technology of high speed cam mechanism with oscillating follower

作　　者：蔡小尧 车文刚[1] 陈文兵 CAI Xiao-yao;CHE Wen-gang;CHEN Wen-bing(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Yunnan Tobacco Machinery Co.Ltd.,Kunming Yunnan 650106,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]云南烟草机械有限责任公司,云南昆明650106

出　　处：《图学学报》2021年第4期664-669,共6页Journal of Graphics

摘　　要：针对高速凸轮摆杆机构参数化设计过程中从动件摆动引起的凸轮转角偏移问题,分析了凸轮转角偏移产生的原因及影响,提出了基于转角补偿量的参数化设计数学模型,实现了凸轮参数到凸轮轮廓曲线的精确映射。以改进正弦运动规律为例,基于UG软件和二次开发平台实现了凸轮摆杆机构参数化设计和特征曲线可视化,并通过UG运动仿真验证了数学模型和特征曲线的准确性。研究结果表明:推程和回程运动阶段凸轮轮廓曲线对应的圆心角对比凸轮转角都发生了不同程度的偏移;基于转角补偿量的数学模型可以降低凸轮从动件的最大加速度,实现凸轮轮廓曲线的精确设计,同时简化了凸轮摆杆机构的设计和修改流程,极大的提高了设计效率。Aiming at the problems of cam angle deviation caused by follower swing in the parametric design process of high-speed cam mechanism with oscillating follower,this paper analyzed the causes and effects of cam angle deviation,proposed a mathematical model of parametric design based on angle compensation,and realized the accurate mapping from cam parameters to cam profile curve.Taking the improved sinusoidal motion law as an example,parametric design and characteristic curve visualization of cam mechanism with oscillating follower were realized based on UG software and secondary development platform,and the accuracy of mathematical model and characteristic curve was verified by UG motion simulation.The results show that the center angle of the cam profile curve is different from the cam angle in push and return stages,and that the mathematical model based on the angle compensation can reduce the maximum acceleration of the cam follower,realize the accurate design of the cam profile curve,simplify the design and modification process of the cam swing mechanism,and greatly improve the design efficiency.

关 键 词：参数化设计 凸轮摆杆机构 凸轮转角偏移 UG二次开发 NX/Open 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]