Cutting insert and cutting tool
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United States of America Patent
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Mar 27, 2018
Issued Date -
N/A
app pub date -
Sep 27, 2013
filing date -
Sep 27, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A cutting insert includes an insert body, a rake face on an upper surface of an end portion of the insert body, a cutting edge on a ridge between the rake face and an end surface of the insert body, side cutting edges on ridges between the rake face and side surfaces of the insert body, each connected to both end portions of the cutting edge, and a breaker convex portion on the rake face. The breaker convex portion includes two breaker island portions extending toward the side cutting edge as extending closer to the front cutting edge. Each breaker island portion includes from the front cutting edge side a first raised portion, a descending portion which becomes lower from a top portion of the first raised portion, and a second raised portion which becomes higher, from the descending portion, than the top portion of the first raised portion.
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