PIN MILLER INSERTS AND A CUTTER USING THE SAME

Title:

PIN MILLER INSERTS AND A CUTTER USING THE SAME

Document Type and Number:

WIPO Patent Application WO/2012/036379

Kind Code:

A3

Abstract:

The present invention discloses a hexahedral insert having an opposed pair of top and bottom abutting faces an opposed pair of rake faces, and an opposed pair of side faces with a central hole passing through each central portion of the abutting faces, wherein arcuate corner portions with one-directional curvature are formed along the intersecting portions between the abutting faces and side faces; the central hole is substantially perpendicular to the abutting faces and parallel to the rake faces and side faces; the upper abutting face has a first wedge-shaped inclined plane adjoining and inclining toward a first rake face, the first wedge-shape having a base side at a cutting edge formed at the border to the first rake face and having a width starting at the border with a first corner portion and increasing gradually to a maximum at the border to a second corner portion and a second wedge-shaped inclined plane adjoining and inclining toward a second rake face, the second wedge-shape having a base side at a cutting edge formed at the border to the second rake face and having a width starting at the border with the second corner portion and increasing gradually to a maximum at the border to the first corner portion; and the second corner portion has a first inclined arcuate surface having continuity of gradient and width at the border to the first wedge-shaped inclined plane and the first corner portion has a second inclined arcuate surface having continuity of gradient and width at the border to the second wedge-shaped inclined plane, wherein the wedge-shaped inclined planes and the inclined arcuate surfaces are formed on the abutting faces and corner portions in top-and-bottom symmetricity such that the first rake face has a larger width on the side of the first corner portion whereas the second rake face has a larger width on the side of the second corner portion.

JP5334668	Cutting inserts and cutting tools and methods for manufacturing workpieces using them
JPS61146444	LATHE

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