High sheer, ultra light duty insert

Details High sheer, ultra light duty insert High sheer, ultra light duty insert

B - Operations, Transporting

23

B

B23B 27/22 (2006.01) B23B 27/14 (2006.01)

Patent

CA 2105535

There is shown a polygonal, lay down indexable cutting insert for low range of feed and depth of cut having a top surface and a bottom surface substantially parallel and identical to each other with a side wall substantially perpendicular thereto and extending substantially unbroken therebetween to define a body. The side wall is comprised of planar side flanks extending from corner to corner of the insert. An island is formed on at least the top surface of the insert. The island has a nose projection at each corner of the insert and the nose projections have a main ridge and two side ridges on either side of the main ridge. The side ridges extend equidistant and opposite to each other and a cutting edge is formed by the intersection of the sidewall and the top surface. The cutting edge is extended along the periphery of the insert; a planar, descending positive land surface extending rearward of the cutting edge; a concave radius shaped chip breaker groove extending parallel to the cutting edge merging with an ascending convey radius shaped backwall corresponding to the main ridge of the nose portion of the island at the corners of the insert; and a planar chip breaker bottom surface along the flanks of the insert. The island has a planar top face which is raised above the cutting edge of the insert.

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