Cutting Insert and Indexable Rotary Cutting Tool
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United States of America Patent
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app pub date -
Jan 11, 2013
filing date -
Apr 25, 2011
priority date (Note) -
Abandoned
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Abstract
A cutting insert is arranged in a tangential direction on an outer peripheral portion of a tool body, the cutting insert having a reduced area in a top view thereof. The cutting insert has an upper face, a lower face and at least five side faces extending between the upper and lower faces. The upper face of the cutting insert has at least five intersection portions intersecting with the at least five side faces. The at least five intersection portions include first and second intersection portions and third and fourth intersection portions shorter than the first and second intersection portions, respectively. A cutting edge is formed at each of the first and second intersection portions. A rake face is formed on cutting side faces corresponding to the first and second intersection portions, respectively, while a cutting edge flank is formed on the upper face.
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