Analysis of kinematic motion deviations of machining centers based on geometric tolerances

摘要

The objectives of the present research are to investigate relationships between kinematic motion deviations of machine tools and geometric tolerances of their components, to propose mathematical models representing kinematic motion deviations of five-axis machining centers, and to apply the models to analysis of the kinematic motion deviations of five-axis machining centers. A set of models is proposed to represent kinematic motion deviations of both the linear tables and the rotary tables, based on the geometric tolerances of the guide-ways connecting the components. By combing the models, three models of the five-axis machining centers are developed and applied to the analysis of the standard deviations of the shape generation motions of the tools and the workpieces. The proposed models provides us with a systematic method to analyze and to estimate the kinematic motion deviations of the five-axis machining centers, based on the geometric tolerances of the guide-ways connecting the components.