Accuracy Evaluation of 5-Axis Machining Center Based on Measurements of Machined Workpiece – Evaluation of Accuracy of 5-Axis Controlled Machining Center –
Yoshitaka Morimoto, Keisuke Nakato, and Motoshi Gontani
Department of Mechanical Engineering, Kanazawa Institute of Technology, 3-1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan
A new method for evaluating the geometrical accuracy of a 5-axis Machining Center (MC) based on the measurement results of the machined workpiece has been developed. The strategy behind our method is to utilize, because of its accuracy, a Coordinates Measuring Machine (CMM) as a master gauge. Thus, the machine operator machines the workpiece and a technologist of precise measurement takes the measurements. In our study, non-rotational machining is utilized to copy and trace the machine trajectory on the workpiece, minimizing the machining error. The profiles of the machined workpiece are measured and evaluated by a CMM, and the geometric errors of the machining center are extracted. Themeasurement results are sufficiently accurate compared to those taken using the square master gauge calibrated by CMM previously. In this report, the machining setup, including workpiece design, tool design, and cutting conditions, is proposed, and the experimental procedures and results of the evaluation are given.
-  T. Inamura, T. Yasui, S. Watanabe, T. Misawa, and H. Yoshida, “Accuracy Investigation of a Machining Center by Using Geometric Error Model,” Precision Engineering, Vol.51, No.5, pp. 1060-1067, 1985.
-  I. Inasaki, “Shape generation theory,” 1997, ISBN-8425-9708-9. (in Japanese)
-  A. Saito, M. Miyakawa, and M. Tsutsumi, “Evaluation Method of Positional and Geometric Deviations Using Simultaneous 4-axis Control Technique in 5-axis Machining Center,” Precision engineering, Vol.67, No.2, pp. 306-311, 2001.
-  M. Tsutsumi, D. Yumiza, K. Utsumi, and R. Sato, “Evaluation of Synchronous Motion in Five-axis Machining Centers With a Tilting Rotary Table,” J. of Advanced Mechanical Design, Systems, and Manufacturing, Vol.1, No.1, pp. 24-35, 2007.
-  M. Tsutsumi and A. Saito, “Identification and compensation of systematic deviations particular to 5-axis machining centers,” Int. J. of Machine Tools & Manufacture, Vol.43, pp. 771-780, 2003.
-  W. T. Lei and Y. Y. Hsu, “Accuracy test of five-axis CNC machine tool with 3D probe-ball, Part 1: Design and modeling,” Int. J. of Machine Tools and Manufacture, Vol.42, pp. 1153-1162, 2002.
-  Y. Ihara, S. Lin, Y. Kakino, and Z. A. Ahmad, “Analysis of the motion accuracy of 5-axis controlled machining centers using DBB method,” Int. J. of Japan Society for Precision Engineering, Vol.32, No.3, pp. 188-193, 1998.
-  M. S. Uddina, S. Ibaraki, A. Matsubara, and T. Matsushita, “Prediction and compensation of machining geometric errors of five-axis machining centers with kinematic errors,” Precision Engineering, Vol.33, Issue 2, pp. 194-201, 2009.
-  S. Weikert, “R-Test, a New Device for Accuracy Measurements on Five Axis Machine Tools,” CIRP Annals – Manufacturing Technology, Vol. 53, Issue 1, pp. 429-432, 2004.
-  Y. Morimoto, Y. Ichida, T. Ohashi, R. Sato, and K. Kato, “Study on Accuracy Compensation of a Machining Center Based on Measurement results ofMachined Workpiece (1st Report: Measurement and Compensation of Geometric and Dimensional Error of Three-Orthogonal Axes,” JSPE, Vol.69, Issue 12, pp. 1718-1723, 2003. (in Japanese)
-  Y. Morimoto, “Study on Accuracy Compensation of Machining Center Based on Measurement Results of Machined Workpiece,” Proc. of The 5th Int. Conf. on Leading Edge Manufacturing in 21st Century, No.09-207, pp. 55-60, 2009.