Improvement of Machining Performance of Small-Diameter End Mill by Means of Micro- and Nanometer-Scale Textures
Noritaka Kawasegi*1,†, Hiroshi Sugimori*2, Noboru Morita*3, and Toru Sekiguchi*4
*1Central Research Institute, Toyama Industrial Technology Center
150 Futagami-machi, Takaoka-shi, Toyama 933-0981, Japan
*2Machinery and Electronics Research Institute, Toyama Industrial Technology Center, Toyama, Japan
*3Graduate School of Engineering, Chiba University, Chiba, Japan
*4NACHI-FUJIKOSHI CORP., Toyama, Japan
The purpose of this study is to develop novel cutting tools with micro- or nanoscale textures on their surfaces. Texturing micro- or nanoscale features on a surface allows us to control the tribological characteristics of the tool. For this research, textures were applied to end mills with a diameter of 0.5 mm using a femtosecond laser, and milling experiments were conducted on aluminum alloy to evaluate the developed tools. The applied texture decreased the cutting forces. This effect depends on the shape of the texture: groove textures are more effective for reducing friction and the resultant cutting forces. Periodic textures fabricated through the interference of the laser were effective at reducing the adhesion of the work material. A larger effect was obtained for shallow and large pitch textures. The results indicate that the proposed method is effective at improving the machining performance of small-diameter end mills.
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