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Ultrasonic elliptical vibration cutting technology
1. Ultrasonic elliptical vibration cutting technology (EVC:Elliptical Vibration Cutting)
1.1 Issues with conventional technology
1.2 Developed Technology
1.3 Example of ultrasonic elliptical vibration cutting
1. Ultrasonic elliptical vibration cutting technology
1.1 Issues with conventional technology
Diamond tools are used for precision/fine cutting, but traditionally they could not be used with steel because of the severe diffusion wear of diamonds.
1.2 Developed Technology
Ultrasonic elliptical vibration cutting has made it possible to achieve polish-free mirror-finish cutting of hardened steel with diamond tools. The principle is based on ultrasonic elliptical vibration applied between the tool cutting edge and the workpiece. Oxygen is adsorbed to the active new surface of the steel that is created with each vibration cycle, forming a protective layer that prevents carbon diffusion from the diamond to the workpiece and suppresses diffusion wear of the diamond. Furthermore, the promotion of chip evacuation drastically reduces cutting resistance and produces a smooth finished surface.
In precision mold manufacturing, mirror cutting is now possible, eliminating the need for nickel-phosphorus plating and the skilled polishing processes.
(Patent No. 6006959 and 5 others, Professor Eiji Shamoto, Nagoya University, et al.)
( http://www.tagaele.com/industrial/el50sigma.html )
・Eiji Shamoto, Yoshiyuki Morimoto, Toshimichi Moriwaki, "Elliptical Vibration Cutting Method (1st Report)," Journal of the Japan Society for Precision Engineering, Vol. 62, No. 8, pp. 1127-1131 (1996)
・Eiji Shamoto, Norikazu Suzuki, "Ultra-precision cutting using elliptical vibration," Journal of the Japan Society for Precision Engineering, Vol. 72, No. 4, pp. 440-443 (2006)
Ultrasonic elliptical vibration cutting method
1.3 Example of ultrasonic elliptical vibration cutting
Example of mirror finish cutting of mold steel
(Stavax, 53HRC, Rz40nm)
Polish-free mirror finishing of heat-resistant tungsten alloy molds and molded glass lenses
・Norikazu Suzuki, Jinmin Yan, Makoto Hariya, Jikbin Yang, Seiji Hamada, Tsuyoshi Hino, and Eiji Shamoto, "Ultra-precision ultrasonic elliptical vibration cutting of tungsten alloys," Journal of the Japan Society for Precision Engineering, Vol. 73, No. 3, pp. 360-366 (2007)