Enhancement of geometric accuracy of five-axis machining centers based on identification and compensation of geometric deviations

Abstract The present paper describes the enhancement of kinematic accuracy of five-axis machining centers with a tilting rotary table. Geometric deviations inherent to the five-axis machine are calibrated through the actual trajectories measured by two different settings of a ball bar in simultaneous three axis motion. Measurement using a cylindrical coordinate system is superior to measurement using a Cartesian coordinate system from the viewpoint of the number of measurements. In order to verify the effectiveness of the calibration method, the inherent geometric deviations measured on the cylindrical coordinate system were corrected through the post processing of NC data for cutting the cone-frustum. The relative displacement between the tool center point and the workpiece was detected by the ball bar. Based on the experimental results, it is confirmed that the radius, center position, and roundness of the three-dimensional circular trajectory are improved when the inherent geometric deviations are corrected.

[1]  Masaomi Tsutsumi,et al.  Identification and compensation of systematic deviations particular to 5-axis machining centers , 2003 .

[2]  Li Zhuang,et al.  Integrated geometric error modeling, identification and compensation of CNC machine tools , 2012 .

[3]  Wuyi Chen,et al.  A methodology for systematic geometric error compensation in five-axis machine tools , 2011 .

[4]  Yukitoshi Ihara,et al.  Ball Bar Measurement Equivalent to Cone Frustum Cutting on Multi-axis Machine , 2005 .

[5]  Masaomi Tsutsumi,et al.  Analysis of circular trajectory equivalent to cone-frustum milling in five-axis machining centers using motion simulator , 2013 .

[6]  Dong-Mok Lee,et al.  Identification and measurement of geometric errors for a five-axis machine tool with a tilting head using a double ball-bar , 2011 .

[7]  Masaomi Tsutsumi,et al.  Analysis of NC Data for Machining Test of Cone-Frustum under Simultaneous Five-Axis Control , 2011 .

[8]  Yoshiaki Kakino,et al.  A Study on the Motion Accuracy of NC Machine Tools (7th Report) : The Measurement of Motion Accuracy of 5 Axis Machine by DBB Test , 1994 .

[9]  Min Wang,et al.  Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar , 2010 .

[10]  Soichi Ibaraki,et al.  Influence of position-dependent geometric errors of rotary axes on a machining test of cone frustum by five-axis machine tools , 2011 .

[11]  Masaomi Tsutsumi,et al.  Sensitivity Analysis in Ballbar Measurement of 3D Circular Interpolation Motion Equivalent to Cone-Frustum Cutting in Five-Axis Machining Centers , 2012 .

[12]  Soichi Ibaraki,et al.  Prediction and compensation of machining geometric errors of five-axis machining centers with kinematic errors , 2009 .

[13]  Ichiro Inasaki,et al.  Identification of alignment errors in five-axis machining centers using telescoping ball bar , 1997 .

[14]  Behrooz Arezoo,et al.  Positional, geometrical, and thermal errors compensation by tool path modification using three methods of regression, neural networks, and fuzzy logic , 2013 .

[15]  Masaomi Tsutsumi,et al.  Generalization of Identification Method of Geometric Deviations for Five-Axis Machining Centers with a Tilting-Rotary Table(Machine Elements, Design and Manufacturing) , 2009 .

[16]  Masaomi Tsutsumi,et al.  Generalization of Identification Method of Geometric Deviations for Mixed Type Five-Axis Machining Centres , 2011 .

[17]  Soichi Ibaraki,et al.  Indirect Measurement of Volumetric Accuracy for Three-Axis and Five-Axis Machine Tools: A Review , 2012 .

[18]  Atsushi Matsubara,et al.  The Accuracy of Cone Frustum Machined by Five-axis Machine Tool with Tilting Table , 2008 .

[19]  J.R.R. Mayer,et al.  Single setup estimation of a five-axis machine tool eight link errors by programmed end point constraint and on the fly measurement with Capball sensor , 2009 .