Turning Insert

摘要

A turning insert includes a top surface, an opposite bottom surface, side surfaces connecting the top surface and the bottom surface and two opposite nose portions. Each nose portion includes a convex nose cutting edge, a first cutting edge and a second cutting edge. The convex nose cutting edge connects the first and second cutting edges. A bisector extends equidistantly from the first and second cutting edges. In a top view the first and second cutting edges on the same nose portion form a nose angle (α) of 70-85° relative to each other. Each nose portion includes a third convex cutting edge adjacent to the first cutting edge and a fourth cutting edge adjacent to the third cutting edge. In a top view the fourth cutting edge forms an angle (β) of 0-34° relative to the bisector.

主权项

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 is 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 extends 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.