Effect of Discharge Duration and Pulse Frequency on Surface Characteristics Using Whirling Electrical Discharge Texturing
Vitchuda Lertphokanont*, Masahiro Oi*, Takayuki Sato*,
Minoru Ota*, Kai Egashira*, Keishi Yamaguchi*,
Masayoshi Yamada**, and Yasuo Tomita**
*Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
**Nissin Manufacturing Co., Ltd., Akasaka-85, Mineyamacho, Kyoto 627-0006, Japan
Discharge duration and pulse frequency are studied to determine the optimum conditions for creating a single crater. In addition, the relationships between pulse frequency and surface characteristics using Whirling Electrical Discharge Texturing (WEDT) are determined. It is confirmed that the texture-area ratio and the total removal volume of craters, but not crater diameter or crater depth, can be controlled by adjusting pulse frequency. Moreover, after honing, surface characteristics decrease owing to the removal of protrusions. With honing, the surface roughness of the textured surface leads to a reduced friction coefficient as expected.
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