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US 7,407,348 B2Granted
Indexable cutting inserts and methods for producing the same
AssigneeSandvik Intellectual Property AB
InventorsClas Sjogren, Mikael Lindholm
Life of this patent
Estimating the term…
Abstract
A cutting insert has a body formed of a superhard material or a superhard material and a cemented carbide, and has a hole through said body and a preformed hole inlay in said hole to allow securing of the insert to a holder. The method of making same is also disclosed.
Claims20
A cutting insert comprising:
- a base portion of a superhard material or a superhard material attached to a cemented carbide, the base portion having a first hole therethrough extending from a first surface of the base portion to a second surface of the base portion;
- and
- an inlay of a hard material attached to said base portion, said inlay having a projecting portion inserted into the first hole, a planar portion covering the second surface of the base portion, a bottom portion extending from the planar portion below a bottom plane of the insert and a second hole extending from a first surface of the projecting portion to a second surface of the bottom portion,
- wherein inner surfaces of the first hole have portions that are one of cylindrical or conical, and
- wherein inner surfaces of the second hole are generally conical.
2 more elements
A method for making a cutting insert comprising:
- forming a layer of superhard material;
- optionally attaching said layer onto a superhard material or a cemented carbide substrate;
- forming a first hole through said layers;
- and
- attaching a preformed hole inlay within said first hole,
- wherein said hole inlay includes a projecting portion inserted into the first hole, a planar portion covering the second surface of the layers, a bottom portion extending from the planar portion below a bottom plane of the insert and a second hole extending from a first surface of the projecting portion to a second surface of the bottom portion,
- wherein inner surfaces of the first hole have portions that are one of cylindrical or conical, and
- wherein inner surfaces of the second hole are generally conical.
5 more elements
A cutting insert comprising:
- a base portion having a first hole therethrough extending from a first surface of the base portion to a second surface of the base portion;
- and
- an inlay attached to said base portion,
- wherein the inlay includes a first side, a second side and a second hole,
- wherein the inlay has a projecting portion on the first side that is inserted into the first hole and extending to the first surface of the base portion, a planar portion on the second side covering the second surface of the base portion, and a bottom portion on the second side extending from the planar portion below a bottom plane of the insert,
- wherein the second hole extends through the inlay from a first, axial distal-most surface of the projecting portion to a second, axial distal-most surface of the bottom portion,
- wherein inner surfaces of the first hole have portions that are one of cylindrical or conical and inner surfaces of the second hole are generally conical, and
- wherein the base portion is formed of a superhard material or a superhard material attached to a cemented carbide and the inlay is formed of a hard material.
5 more elements
Dependencies are inferred from the claim text.