Patent ID: 9737935
Date: 2017-08-22
CPC Classifications: B23B

Claim:
1. A turning insert comprising: a top surface; an opposite bottom surface; side surfaces connecting the top surface and the bottom surface; two opposite nose portions, each nose portion including a convex nose cutting edge; a reference plane located parallel to and between the top surface and the bottom surface; a center axis extending perpendicular to the reference plane, each nose portion having a first cutting edge and a second cutting edge, the convex nose cutting edge connecting the first and second cutting edges; and a bisector extending equidistantly from the first and second cutting edges, the first and second cutting edges on the same nose portion forming a nose angle of 70-85° relative to each other, each nose portion including a third convex cutting edge adjacent to the first cutting edge and a fourth cutting edge adjacent to the third convex cutting edge, wherein the fourth cutting edge forms an angle of 0-34° relative to the bisector, a distance from the forth cutting edge to the reference plane decreasing away from the nose cutting edge.