Efficiency Study Of In-line Roller Follower Cam Mechanisms

In this paper, the author has inferred the instantaneous efficiency equation during rise and return and the general efficiency equation during rise, return and the whole motion cycle respectively by analyzing two kinds of force states of in-line roller follower cam mechanisms in detail. The complete efficiency equations are presented for the first time, so foundation is settled for correct efficiency calculation and theory analysis. In the axes permitted area determined by different given basic design parameters, for different size and different axes position ,the instantaneous efficiency variation rule during rise and return and the whole efficiency variation nile during rise, return and the motion cycle of in-line follower cam mechanisms has been studied respectively. The relationship between cam mechanisms?efficiency and some design parameters, especially the relationship between efficiency and pressure angle of cam mechanisms, has been discussed and the real variation rule of efficiency has been given. These mentioned above have very important theory抯 reference value for clarifying dispute about the theory of the relationship between efficiency and pressure angle.At the same time, the author has written the single-target optimization design抯 program that is used to design cams which have the highest efficiency and the double-target optimization design抯 program which is used to design cams which have higher efficiency and better machine characteristic. There is the function of the double-target optimization design抯 program displaying the designed cam mechanism抯 simulated whole motion procedure as well. By comparing optimum cams of simple harmonic follower-motion basic curve with optimum cams of cycloidal follower-motion basic curve, some conclusion of reference values are drawn. It is a completely new double-target optimization design. There is good general use of this program .The program can be enlarged so that it can be used to design cams for many kinds of follower-motion basic curve. There is great practical value of it for cam design and cam machining.All these equations, conclusion and programs can also be applied to in-line knife-edge follower cam mechanisms. The above-mentioned study has enlarged the theory of cam mechanisms and has very important theory抯 value and practical value.