Research on Key Technologies for Improving Machining Accuracy of Five Axis Machining Centers
The five axis machining center has the advantages of high machining accuracy,high efficiency,and easy maintenance,and is widely used as an industrial mother machine in the field of high-precision and cutting-edge technology.This article takes the RRTTT type five axis machining center as an example to establish a geometric error volume accuracy model for the translational axis and analyze error sensitivity terms to improve the machining accuracy of the five axis machining center.Firstly,the geometric error generated when the tool point moves along the translational axis is analyzed.Secondly,the homogeneous coordinate transformation matrix expression of geometric error is derived through coordinate transformation theory.Then,a volumetric accuracy model for the translational axis geometric error of a five axis machining center is established.Finally,based on the experimental measurement data of the geometric error of a five axis machining center,the relationship between volumetric accuracy and the position of the tool point is analyzed through simulation,determine the areas with relatively high machining accuracy for the tool positions of the five axis machining center,and conduct sensitivity analysis on geometric errors through volume accuracy to determine the error sensitive term that has the greatest impact on the machining accuracy of the five axis machining center.By modeling the volume accuracy of geometric errors of the translational axis and analyzing the error sensitive term,the study effectively improves the machining accuracy of the five axis machining center.
five axis machining centergeometric errorvolume accuracymachining accuracy
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