Cutter insert for roughing and finishing
AssigneeWidia GmbH
InventorGerhard Rothballer
Life of this patent
Estimating the term…
Abstract
A cutting insert is formed with a substantially hexagonal cutting face having six sides forming three main cutting edges and three auxiliary cutting edges alternating with the main edges. Each of the main cutting edges is substantially straight and each of the auxiliary cutting edges is outwardly convex. A plateau is on the face inward of the cutting edges and defines a plane. Respective free surfaces each extend generally perpendicular to the plane from the cutting edges and meet at corners between the edges. The main cutting edges are usable for roughing and the auxiliary cutting edges for finishing. The insert is formed on the face along an entire length of and parallel to each of the cutting edge with a respective groove.
Claims18
A cutting insert formed with
- a substantially hexagonal cutting face having six sides forming three main cutting edges and three auxiliary cutting edges alternating with the main edges, each of the main cutting edges being substantially straight and each of the auxiliary cutting edges being outwardly convex,
- a plateau on the face, inward of the cutting edges, and defining a plane, and
- respective free surfaces each extending generally perpendicular to the plane from the cutting edges and meeting at corners between the edges, whereby the main cutting edges are usable for roughing and the auxiliary cutting edges for finishing.
A milling tool comprising:
- a tool holder formed with a seat rotatable about a tool axis adjacent a workpiece plane generally perpendicular to the tool axis;
- and
- a cutting insert in the seat formed with
- a substantially hexagonal cutting face having six sides forming three main cutting edges and three auxiliary cutting edges alternating with the main edges, each of the main cutting edges being substantially straight and each of the auxiliary cutting edges being outwardly convex;
- a plateau on the face, inward of the cutting edges, and defining a plane, and
- respective free surfaces each extending generally perpendicular to the plane from the cutting edges and meeting at corners between the edges, whereby the main cutting edges are usable for roughing and the auxiliary cutting edges for finishing.
Dependencies are inferred from the claim text.