Detection method for synchronization error between translational motion shaft and rotating shaft of five-axis numerically-controlled machine tool

Abstract

The invention discloses a detection method for the synchronization error between a translational motion shaft and a rotating shaft of a five-axis numerically-controlled machine tool. The detection method comprises the following steps that (1) a measurement range is determined, and a measurement trajectory NC program is calculated; (2) an evaluation index of the synchronization error between the rotating shaft and the translational motion shaft is determined; (3) a ball bar meter is installed, a tool tip rotating follow function of the five-axis machine tool is started, the measurement program is operated, and measurement data of the ball bar meter are obtained; (4) the current synchronization error between the rotating shaft and the translational motion shaft is worked out; and (5) the servo position proportional gain and speed feed-forward gain servo parameters of the measured rotating shaft and servo position proportional gain and speed feed-forward gain servo parameters of the measured translational motion shaft are adjusted according to the measured synchronization error situation, and then error measurement is conducted till the error reaches the precision requirement level of the machine tool. According to the detection method for the synchronization error between the translational motion shaft and the rotating shaft of the five-axis numerically-controlled machine tool, measurement of the synchronization error between the rotating shaft and the translational motion shaft can be achieved by simply measuring the movement path, operation is easy, error separation is clear, and efficient adjustment of the synchronization error is convenient.

Description

technical field [0001] The invention relates to the field of error detection of a five-axis numerically controlled machine tool, in particular to a method for detecting the synchronous error of a translational axis and a rotating axis of a five-axis numerically controlled machine tool. Background technique [0002] The dynamic error of CNC machine tools broadly refers to the deviation between the actual position and the theoretical position during the movement of the machine tool. It is a comprehensive reflection of all errors such as mechanical structure geometric errors, servo system control errors, environmental thermal deformation errors, and CNC system interpolation errors. In the actual processing process, the dynamic errors of the machine tool that cause the quality defects of five-axis linkage machining workpieces are mainly servo mismatch and dynamic reverse errors, especially in high-speed machining, servo synchronization errors will cause contour errors on the mach...

AI Technical Summary

Problems solved by technology

[0004] For example, Masaomi Tsutsumi et al. proposed in the paper analysis of circular trajectory equivalent to cone-frustum milling in five-axis machining centers using motion simulator , international journal of machine tools & manufacture 64 (2013) 1-11, through five-axis linkage based on ballbar The method of simulating oblique conical motion measures the comprehensive dynamic accuracy of the five-axis linkage motion, but this method integrates the error terms of the five axes, which is not convenient for separating the synchronization errors of the translation axis and the rotation axis

Images