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首页> 外文期刊>International Journal of Precision Engineering and Manufacturing >A Hybrid Approach for Cam Shape Design and Profile Machining of General Plate Cam Mechanisms
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A Hybrid Approach for Cam Shape Design and Profile Machining of General Plate Cam Mechanisms

机译:通用板凸轮机构的凸轮形状设计和轮廓加工的混合方法

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摘要

Plate cam mechanism can easily produce the positive and functional motions in contact of cam and follower. Generally cam mechanism is used in many fields of mechanical control, automation, and industrial machinery, To obtain the accurate motion of follower, the profile of cam must be designed and machined precisely. This paper proposes an instant velocity center method for the profile design and a biarc fitting method for the profile machining to 4 different types of plate cam mechanisms with reciprocating or oscillating motion and roller or flat-faced followers. The key of this paper is the introduction of a hybrid system combined the design procedures and the manufacturing procedures. The main idea is that the minimum machining data are built by the accurate biarc curves fitted directly from the design parameters, The radial direction angles toward biarc centers for the accurate biarc curve fitting can be defined directly by the contact angle of cam and follower given in the design procedures. An application of the proposed approach is verified the accurate profiles of a designed cam and a machining cam using the minimum NC data within a given machining tolerance.
机译:平板凸轮机构可以轻松地在凸轮和从动件接触时产生正向运动和功能运动。通常,凸轮机构用于机械控制,自动化和工业机械的许多领域,为了获得从动件的精确运动,必须精确设计和加工凸轮轮廓。本文提出了一种用于轮廓设计的瞬时速度中心方法,以及一种用于对4种不同类型的具有往复运动或摆动运动的平板凸轮机构以及滚子或平面从动件进行轮廓加工的偏心拟合方法。本文的重点是引入结合了设计过程和制造过程的混合系统。主要思想是最小的加工数据由直接从设计参数拟合的精确biarc曲线建立。对于精确biarc曲线拟合,朝向biarc中心的径向角可以直接由凸轮和从动件的接触角定义,具体请参见设计程序。在给定的加工公差范围内,使用最少的NC数据验证了所提出方法的应用,验证了设计凸轮和加工凸轮的精确轮廓。

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