A Study And Practice On The Machining Technology Of Cycloid Rotational Indexing

At the present time,the machine tool with the method of cycloid rotational indexing method was still a special machine, so that it could not be used widely. This paper studied a lot by analyzing its theory and machining experiment for its universal character. First, the definition and equation of cycloid was expatiated based on the mathematical model of cycloid, and then the machining principle of cycloid rotational indexing was described. The part was sorted to three ones according to its surface character, even polygons and slots, odd polygons and involutes. Based on it, universal models were builded for the three kinds of parts. On condition that the approximate error was in allowable range, the optimization algorithm to fix cycloid parameters was given for the objective of the highest machining efficiency. According to the cycloid parameters, the NC program was developed. Through a lot of machining experiments, this paper described the process character of the machining method and the method to select tool material, and found out factors that impact on the process precision, such as approximate error of tool, instability of spindles'speed rate, radial tremor of spindle, heat in machine cut and so on. And then some proposals on process were bring forward, specially machining the involutes with two layers. The last, it was proved that the models were correct with sample parts. Based on the study of this paper, the application range of the machine in cycloid rotational indexing method was extended and the machine got a universal character at a certain extent. At the end of the paper, some problem was described which needed more study about the machine, such as speed of machining, heat of machining, analysis of machine cutting force and so on.