Dynamic Accuracy Testing Method for Five-Axis Machine Tools Based on Double Ballbar
In order to address the dynamic accuracy inspection of five-axis CNC machine tools,a five-axis synchronous detection method based on a ball bar is proposed.This method is based on traditional circular arc detection and involves studying the configuration of S-shaped workpieces to extract the five-axis coordi-nated tool axis vectors during the machining of S-shaped workpieces.These vectors are then matched with the circle detection positions.This enables the tool tip to perform circular motion while the tool axis per-forms complex swinging,thereby simulating the actual machine tool motion during the machining of com-plex surfaces.A dynamic error model of a five axis CNC machine tool based on a ball and rod instrument was constructed,and the expression of the dynamic error of each axis and the data of the ball and rod in-strument was derived through motion chain transmission.Using this method to guide the optimization and adjustment of servo parameters for each axis can improve the dynamic accuracy of CNC machine tools.The effectiveness of this method for dynamic performance detection of five-axis CNC machine tools was veri-fied through machine measurement experiments.
NETL
NSTL
万方数据
