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Effect on Axial Rake Angle of Cutting Edge for Machinable Ceramics  

Jang, Sung-Min (Department of Mechanical Engineering, Yuhan College)
Yun, Yeo-Kwon (Department of Mechanical Design, Yuhan College)
Publication Information
Journal of the Korean Society of Safety / v.24, no.2, 2009 , pp. 7-12 More about this Journal
Abstract
The machining process of ceramics can be characterized by cracking and brittle fracture. In the machining of ceramics, edge chipping and crack propagation are the principal reasons to cause surface integrity deterioration. Such phenomenon can cause not only poor dimensional and geometric accuracy, but also possible failure of the ceramic parts. Thus, traditional ceramics are very difficult-to-cut materials. Generally, ceramics are machined using conventional method such as grinding and polishing. However these processes are generally costly and have low MRR(material removal rate). To overcome such problems, in this paper, h-BN powder, which gives good cutting property, is added for the fabrication of machinable ceramics by volume of 10 and 15%. The purpose of this study is an analysis of endmill's rake angle for appropriate tools design and manufacturing for the machinable ceramics. In this study, Experimental works are executed to measure cutting force, surface roughness, tool fracture, on different axial rake angle of endmills. Cutting parameters, namely, feed, cutting speed and depth of cut are used to accomplish purpose of this paper. Required experiments are performed, and the results are investigated.
Keywords
difficult-to-cut material; machinable ceramics; MRR; h-BN; axial rake angle;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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