Tool comprised of a holder body and a hard insert and method of using same
AssigneeSandvik AB
InventorsAlexander B. Graham, Jan M. Andersson
Life of this patent
Estimating the term…
Abstract
A breaking or excavating tool has a diamond and/or cubic boron nitride coated cutting insert mounted at the forward end of a tool body which is made of a softer material than the insert. A separately formed retaining member such as a washer, ring or sleeve, made of harder material than the body, is brazed to a front face of the body surrounding the insert to protect the tool body against wear.
Claims41
A tool comprising a tool body having a forward end;
- an aperture disposed in said forward end;
- an insert comprising a body portion received in said aperture and a tapered tip projecting forwardly from said aperture;
- said forward end including a front face situated adjacent said aperture;
- a separately formed ring lying over said front face and surrounding said body portion of said insert, said insert and ring each being secured in position on said tool body and being formed from a harder material than said tool body, wherein said ring has a flat annular shape.
A tool comprising a tool body having a forward end;
- an aperture disposed in said forward end;
- an insert comprising a body portion received in said aperture and a tapered tip projecting forwardly from said aperture;
- said forward end including a front face situated adjacent said aperture;
- a separately formed ring lying over said front face and surrounding said body portion of said insert, said insert and ring each being secured in position on said tool body and being formed from a harder material than said tool body, wherein said ring includes a front surface of concave shape.
A tool comprising a tool body having a forward end;
- an aperture disposed in a front face of said forward end;
- an insert comprising a body portion received in said aperture and a tapered tip projecting forwardly from said aperture;
- said front face surrounding said aperture;
- a separately formed sleeve lying over said front face and surrounding said body portion of said insert, said insert and sleeve being secured in position on said tool body and being formed from a harder material than said tool body.
A tool comprising a tool body having a forward end;
- an aperture disposed in a front face of said forward end;
- an insert comprising a body portion received in said aperture and a tapered tip projecting forwardly from said aperture;
- said insert including a layer of wear-resistant material which is harder than the insert on an exposed working surface thereof;
- said front face surrounding said aperture;
- a separately formed retaining member lying over said front face and surrounding said body portion of said insert, said insert and retaining member being secured in position on said tool body and being formed from a harder material than said tool body.
A method of breaking or excavating minerals or paving material with a tool comprising a tool body having a forward end;
- an aperture disposed in a forward face of said forward end;
- an insert comprising a body portion received in said aperture and a tapered tip projecting forwardly from said aperture;
- said insert including a layer of a wear-resistant material which is harder than the insert on an exposed working surface thereof;
- said front face surrounding said aperture;
- a separately formed retaining member lying over said front face and surrounding said body portion of said insert, said insert and retaining member being secured in position on said tool body and being formed from a harder material than said tool body, the method comprising rotating said tool such that the tool extends radially outwardly from an axis of rotation and the forward end of the tool travels in a circular path about the axis of rotation;
- and moving the tool such that the insert impacts a material to be broken or excavated, whereby the material is broken or excavated by the rotational impact with the insert of the tool.
Dependencies are inferred from the claim text.