| 摘要 |
<p>An indexable hexahedral cutting insert has opposing top and bottom abutting faces, opposing rake faces connecting to opposing side faces, and a central hole passing through the abutting faces. Each rake face is wider in the top-to-bottom direction at a different one of the side faces. Arcuate corner portions with one-directional curvature are formed along intersecting portions between the abutting faces and the side faces. Each abutting face has first and second wedge-shaped inclined planes adjoining and inclining toward corresponding first and second rake faces. Each inclined plane has a base side at a cutting edge formed at the border with one of the rake faces, and a width which gradually increases from one corner portion to the opposite corner portion along the abutting face. Each corner portion has an associated inclined arcuate surface adjacent to the wide end of the wedge-shaped inclined planes.</p> |
