Computer simulation applied to an orthogonal three-rod machine tool for machining a complicated three-dimensional surface

摘要

A computer simulation approach to machine a complicated three-dimensional surface by using a virtual orthogonal three-rod machine tool is presented. First, based on a Runt's parallel mechanism of three degrees of freedom, a three-dimensional virtual orthogonal three-rod machine tool with three degrees of freedom is created with advanced C{sub}(AD) software. Secondly, a tool spiral path base on the three-dimensional surface of workpiece is constituted. Thirdly, the tool spiral path base of the three-dimensional surface is assembled into a virtual orthogonal three-rod machine tool with some auxiliary links and a new virtual one-degree of freedom mechanism is created. Finally, by analyzing reversing motion, a reasonable input rotation function is determined, and the kinematic curves of the three rods and the feeding process are simulated and analyzed.