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IJAT Vol.16 No.1 pp. 87-94
doi: 10.20965/ijat.2022.p0087
(2022)

Paper:

Rotary Cutting with Ultrasonic Vibration of Hardened Steel

Shinichi Ninomiya*,†, Satoshi Nagakura*, Fumio Koga**, Yoji Yamada*, and Manabu Iwai***

*Nippon Institute of Technology
4-1 Gakuendai, Miyashiro-machi Saitama 345-8501, Japan

Corresponding author

**Koga Co., Ltd., Kanuma, Japan

***Toyama Prefectural University, Imizu, Japan

Received:
July 8, 2021
Accepted:
August 2, 2021
Published:
January 5, 2022
Keywords:
ultrasonic rotary cutting, high-hardness steel, critical cutting speed, cutting resistance, machined surface roughness
Abstract

We propose ultrasonic rotary cutting, in which ultrasonic vibrations are imparted to a rotating cemented carbide cylindrical tool to cut hardened steel to reduce the cutting resistance and improve the properties of the machined surface, and investigate the machining characteristics. Machining experiments were conducted under dry and wet conditions to verify the effects of the ultrasonic vibrations. The surface produced via ultrasonic rotary cutting was intermittently machined, which is characteristic of ultrasonic cutting. In dry machining, the cutting resistance was reduced by approximately 20%, and the surface roughness of the machined surface was reduced by approximately 30% when the cutting speed was below the critical speed. We also demonstrated that the surface roughness was improved by ultrasonic vibrations when the cutting speed was equal to or above the critical speed. A similar tendency was observed in wet machining with longer cutting lengths. We then applied ultrasonic rotary cutting to machine a straight R groove in hardened steel and showed that the cutting resistance was reduced, and the tool engagement was improved.

Cite this article as:
S. Ninomiya, S. Nagakura, F. Koga, Y. Yamada, and M. Iwai, “Rotary Cutting with Ultrasonic Vibration of Hardened Steel,” Int. J. Automation Technol., Vol.16, No.1, pp. 87-94, 2022.
Data files:
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Last updated on Sep. 27, 2022