Development of Table-on-Table-Type Five-Axis Machining Center: New Structure and Basic Characteristics
Naoshi Takayama*, Hidehito Ota**, Kensuke Ueda**,
and Yoshimi Takeuchi*
*Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
**Mori Seiki Co., Ltd., 362, Idono, Yamatokoriyama, Nara 639-1183, Japan
The demand for five-axis machining centers has been increasing rapidly, as companies seek “intensive processes” and “high accuracy.” However, it is generally more difficult for five-axis machining centers to achieve the same or higher accuracy than three-axis machining centers since it is necessary to have two more rotary feed axes besides the three linear feed ones. Many kinds of five-axis machining centers with various structures have been developed to date; an analysis of the advantages and disadvantages of major five-axis machining center structures was done first. As a result of this analysis, this paper focuses on the “table-on-table type” five-axis machining center. It is capable of accuracy because of its wide range of rotation for the rotary axis and its advantages in the adjustment process of the axis. and this paper proposes a five-axis machining center which has this construction. Furthermore, a new high-speed, highaccuracy, “table-on-table type” of five-axis machining center which uses a direct-drive motor for the rotary axis and a driven center of gravity for the linear axis has been developed based on this concept, and its accuracy has been verified.
and Yoshimi Takeuchi, “Development of Table-on-Table-Type Five-Axis Machining Center: New Structure and Basic Characteristics,” Int. J. Automation Technol., Vol.5, No.2, pp. 247-254, 2011.
-  M. Sato, “Design and performance of five-axis machining center in Japan,” The 12th International Machine Tool Engineers’ Conference, “IMEC,” Lecture text, p. 45, 2006.
-  M. Fujishima and N. Takayama, “Development of high-speed and high-accuracy FIVE-axes Machine Tools,” Proc. of JSPE Autumn Annual Meeting, Seminar lecture dissertation collection, A09, p. 5, 2008.
-  Y. Kakino, S. Ibaraki, K. Ogawa, and H. Ota, “Measurement of Motion Accuracies of FIVE-AXIS Machine tools by Using the Double Ball Bar Method DBB5,” International Symposium on Flexible Automation, JS006, p. 1, 2008.
-  N. Takayama and S. Kashiwagi, “Application of newest machining center and its periphery equipment,” Tool Engineer, special edition, p. 6, 2007.
-  N. Takayama, “High-speed and high-accuracy five-axis machining center by direct drive motor,” Journal of JSME, Topics column, p. 539, June 2008.
-  ISO 230-2, Test code for machine tools Part2, “Determination of accuracy and repeatability of positioning numerically controlled machine tools,” 2008.
-  NAS979, “Uniform cutting test metal cutting equipments,” 1969.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 International License.