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US 4,787,784 AGranted
Polygonal cutting insert
AssigneeGTE Valenite Corporation
InventorsThomas J. Bernadic, Tony M. Lowe, John H. Patterson, Karl A. Kathi, Charles F. Zimmerman, Yefim Val
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Abstract
A polygonal indexable cutting insert has a chip breaker with a backwall arranged in a sinuous path so as to deflect chips in a direction toward the center of the insert.
Claims5
A polygonal indexable cutting insert comprising a pair of substantially parallel faces and peripheral side surfaces normal to said parallel faces,
- said faces and said side surfaces being joined to form corners,
- a pair of cutting edges extending away from each corner substantially within the plane of a respective one of said faces,
- a pair of floor surfaces,
- each floor surface being substantially parallel to a respective face and spaced downwardly therefrom,
- a ramp surface extending downwardly from a respective cutting edge to said floor surface whereby said insert has a positive rake,
- a backwall surface extending between a respective floor surface and respective face surface, and
- said backwall extending in a sinuous path from each corner to an adjacent corner in a manner tending to deflect chips inwardly toward the center of said insert wherein said sinuous path comprises a plurality of undulations wherein each undulation includes a curved section near the center of the insert and a pair of outwardly extending keg portions.
4 more elements
Dependencies are inferred from the claim text.