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IJAT Vol.14 No.2 pp. 253-259
doi: 10.20965/ijat.2020.p0253
(2020)

Paper:

Effect of Tool Rake Angle and Crystal Orientation on Ductile Mode Cutting of Hard/Brittle Materials

Abdallah Abdelkawy*, Masahiko Yoshino**,†, and Yuki Nakagawa**

*Cairo University
Gamaa Street, Giza 12613, Egypt

**Tokyo Institute of Technology, Tokyo, Japan

Corresponding author

Received:
August 15, 2019
Accepted:
December 2, 2019
Published:
March 5, 2020
Keywords:
ductile mode cutting, soda glass, sapphire, crystalline anisotropy, specific cutting force
Abstract

The effects of negative rake angles on the ductile mode cutting of soda glass and sapphire were studied. In addition, the machining mechanism was studied using a groove-cutting model based on the orthogonal cutting theory. It was found that the specific cutting forces in ductile mode cutting increase on both the soda glass specimen and on the sapphire specimen when the rake angle of the tool becomes negative. The difference between the experimental data and theoretical data of the specific cutting forces becomes large when the tool has a high rake angle on the negative side. This is attributed to effects of the roundness of the edge, the effects of the roundness of the nose, and the plowing mechanism, which causes plastic flow of the work material to both sides of the groove. The specific cutting force of sapphire depends on the cutting direction against the crystal orientation. The specific cutting force of sapphire depends on the cutting direction in terms of the crystal orientation. The anisotropy of the cutting force of sapphire also depends on the rake angle of the tool.

Cite this article as:
A. Abdelkawy, M. Yoshino, and Y. Nakagawa, “Effect of Tool Rake Angle and Crystal Orientation on Ductile Mode Cutting of Hard/Brittle Materials,” Int. J. Automation Technol., Vol.14, No.2, pp. 253-259, 2020.
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Last updated on Dec. 02, 2020