The modeling and analysis of geometric error for machining center by homogeneous coordinate transformation method

In this paper, the collectivity error transformation matrix from the tip of the cutting tool to the workbench is set up for TH6350 machining center, by based on this, the numerical model of the universal geometric error of machining center is built up by applying the homogeneous coordinate transformation principle and the rigid-body hypothesis, and the geometric error of TH6350 machining center is calculated, the numerical model of geometric error is verified and analyzed by the way. The analyzed result plays a very important rule to improving designing, error compensation and practical machining of TH6350 machining center.