Cutting Insert Having Grooves Formed Between Adjacent Cutting Edges
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United States of America Patent
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app pub date -
May 20, 2011
filing date -
Nov 21, 2008
priority date (Note) -
Abandoned
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Abstract
A cutting insert has a structure by which a sufficient surface area is in contact with a tool holder and cutting fluid can be smoothly flowed. The cutting insert has an upper face, a lower face, a plurality of side faces connecting the upper face and the lower face and a through hole passing through the upper face and the lower face, the upper face being divided into a periphery region disposed adjacently to cutting edges formed by the upper face and the side faces, and a central protruded region disposed between the through hole and the periphery region and surrounding the through hole, the central protruded region being placed higher than the edges. The periphery region is formed along all the cutting edges and includes a descent face inclined downward from a given cutting edge to the central protruded region, a bottom face and an ascent face inclined upward from the bottom face to the central protruded region. A plurality of grooves are formed on the central protruded region of the upper face, each groove being formed such that both ends of the groove are directed to adjacent cutting edges.
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