Micro-Structuring on Cylindrical Inner Surface Using Whirling Electrical Discharge Texturing

Abstract:

The authors developed Whirling Electrical Discharge Texturing (WEDT) in order to reduce friction coefficient of cylinder-shaped parts. In previous research, the authors verified fundamental characteristics of WEDT by observation of textured surface. It was found that a crater shape and texture-area ratio can be controlled by WEDT. The texture-area ratio depends on feed speed of tool electrode. In this research, crater depth, crater diameter, texture area ratio and total removal volume of craters were investigated to confirm characteristics of WEDT in detail. In addition, tungsten wire was used as a whirling shaft in order to improve stability of whirling phenomenon. Moreover, a textured surface was finished by lapping-film in order to remove protrusions around craters and reduce friction coefficient. As a result, it was verified that the texture-area ratio slightly increased with decreasing feed speed and it was confirmed that crater depth, crater diameter, and total removal volume of craters were also related to feed speed.

• Periodical: Advanced Materials Research (Volume 565)
• Pages: 430-435
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.565.430
• Online since: September 2012
• Authors: Vitchuda Lertphokanont, Takayuki Sato, Minoru Ota, Keishi Yamaguchi, Kai Egashira
• Keywords: Crater, Electrical Discharge Texturing, Microstructuring, Texture-Area Ratio, Whirling Phenomenon

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DOI: 10.1243/13506501jet739