US 9,592,558 B2 · Dual tip cutter and method of hard turning

Abstract

A dual tip cutter (10) includes a body (12) defining a feed direction (F), a cutting direction (C) perpendicular to the feed direction, and a depth direction (D) perpendicular to both feed and cutting directions. A first cutting portion (35) is fixed relative to the body at a body first end. A second cutting portion (45) is fixed relative to the body at the body first end, adjacent the first cutting portion. The first and second cutting portions are stacked in the cutting direction so that the first cutting portion forms a leading cutting portion and the second cutting portion forms a trailing cutting portion for simultaneous cutting. The second cutting portion extends from the body further in the depth direction than the first cutting portion. A relative position between the first and second cutting portions is set such that a total chip load is shared between the first and second cutting portions in a predetermined ratio (K).

Claims18

Dependent claims

A dual tip cutter comprising:

a body defining a feed direction, a cutting direction perpendicular to the feed direction, and a depth direction perpendicular to both the feed direction and the cutting direction;
a first cutting portion fixed relative to the body at a first end of the body;
and
a second cutting portion fixed relative to the body at the first end of the body adjacent the first cutting portion,
wherein the first and second cutting portions are stacked in the cutting direction so that the first cutting portion forms a leading cutting portion and the second cutting portion forms a trailing cutting portion for simultaneous cutting with the leading cutting portion, the second cutting portion extending from the body further in the depth direction than the first cutting portion,
wherein a relative position between the first cutting portion and the second cutting portion is set such that a total chip load is shared between the first and second cutting portions, and
wherein cutting edges of each of the first and second cutting portions that are forward in the feed direction are aligned in a plane parallel to the cutting direction.

4 more elements

A method of hard turning a work piece having a hardness value of at least HRC 58 to a smooth finished surface, the method comprising:

providing a dual tip cutter having a body defining a feed direction, a cutting direction perpendicular to the feed direction, and a depth direction perpendicular to both the feed direction and the cutting direction;
setting a relative positioning between a first cutting portion fixed relative to the body at a first end of the body and a second cutting portion fixed relative to the body at the first end of the body adjacent the first cutting portion;
cutting the work piece with the first cutting portion;
and
cutting the work piece, simultaneously with the cutting of the first cutting portion, with the second cutting portion, with the first cutting portion leading the second cutting portion in the cutting direction, wherein the first cutting portion removes a first amount of material from the work piece, and the second cutting portion removes an additional amount of material from the work piece so that the total chip load is distributed between the first and second cutting portions according to a partition ratio,
wherein cutting edges of each of the first and second cutting portions that are forward in the feed direction are aligned in a plane parallel to the cutting direction.

3 more elements

Dependencies are inferred from the claim text.

Dual tip cutter and method of hard turning

Life of this patent

Dual tip cutter and method of hard turning

Life of this patent

Abstract

Claims18