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Technical Briefs

The Study on Abrasive Water Jet for Predicting the Cutting Performance and Monitoring the Cutting Situation in the Water

[+] Author and Article Information
Yasuyuki Nakamura, Kazuya Sano, Yoshitugu Morishita

 Japan Atomic Energy Agency, 3 Myoujin-cho, Tsuruga City, Fukui-prefecture 914-8510, Japan

Shinichiro Maruyama, Shinichi Tezuka, Daisuke Ogane

 Sumitomo Mitsui Construction Co., Ltd., 518-1 Komaki, Nagareyama City, Chiba-prefecture 270-0132, Japan

Yuji Takashima

 Nissin Kiko Co., Ltd., 114-2 Yomagidai, Meito-ku, Nagoya City, Aichi-prefecture 465-0091, Japan

J. Eng. Gas Turbines Power 133(6), 064501 (Feb 14, 2011) (3 pages) doi:10.1115/1.4002252 History: Received March 25, 2010; Revised July 23, 2010; Published February 14, 2011; Online February 14, 2011

The abrasive water jet (AWJ), is to shoot the abrasive mixed with high-pressure water to the material for cutting, can cut most materials, such as metals and concretes in water with long stand-off means the length from the cutting head to the material for cutting. On the other hand, AWJ is required to reduce an amount of the abrasive because it becomes the waste. It is also difficult to monitor the cutting condition by any visual methods such as a TV camera in the water becoming cloudy by both used abrasive and cut metal grit. For solving these issues, some cutting tests were conducted and (1) it was possible to predict an optimal supply rate of abrasive by considering the conservation of momentum between the water jet and the abrasive. (2) It was also possible to judge whether the material could be cut successfully or not by detecting the change in the frequency characteristics of vibration or sound caused during the cutting process.

FIGURES IN THIS ARTICLE
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Copyright © 2011 by American Society of Mechanical Engineers
Topics: Cutting , Water
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References

Figures

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Figure 1

The relation between the cutting velocity and the abrasive supply rate

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Figure 2

Assumed momentum conservation in the water jet

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Figure 3

Tensile stress-strain diagram on P/T

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Figure 4

Estimated threshold cutting velocity of the irradiated Zr specimen

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Figure 5

Position of the sensor

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Figure 6

Changes in the frequency characteristics over time (abrasive supply rate 1.0 kg/min)

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