Study on Residual Vibration of Indexing Cam Mechanism (2nd Report, Dynamic Characteristics of Universal Cam Curve)

摘要

This paper deals with a theoretical analysis and a numerical simulation of the residual vibration on the indexing cam mechanism. Higher speed operation of cam mechanism causes a larger transient and residual vibration, thus deteriorates the positioning accuracy and results the lower settling time. It requires longer time and much manpower to design an optimal motion curve for every applications and analyze the dynamic behavior, which is largely determined by specifications of cam mechanism including motion curve. For this reason, motion curves have been selected by evaluating the characteristic values (i. e. the maximum acceleration or velocity of a motion curve) or by past experiences. This paper generalizes parametrically defined trigonometric and polynomial universal motion curves for vibration simulations, this enables to select optimal motion curves fitting the given specifications in a shorter time. From the results of the simulation, a better motion curve which is differ from the curve which is thought as best was selected, thus this theory and simulation system was verifies as effective.