Coated bore cutting tools
AssigneeDormer Tools Limited
InventorVijitha Weerasinghe
Life of this patent
Estimating the term…
Abstract
A twist drill partially coated with TiN to increase wear resistance whilst minimising the transfer of coating particles to a work piece. The drill is selectively coated on the rake face (42); the land (46) is not coated.
Claims26
A bore cutting tool having
- a cutting edge,
- a rake face extending from one side of the cutting edge,
- a non-cutting back face extending from the opposite side of the cutting edge to the rake face, and
- a land,
- wherein the rake face is at least partially coated but the land and at least part of the back face are not coated.
A method of partially coating a bore cutting tool, the tool having a cutting edge, a rake face extending from one side of the cutting edge, a back face extending from the opposite side of the cutting edge to the rake face and a land, wherein the method includes the step of
- at least partially coating the rake face but not coating the land and at least part of the back face;
- wherein the coating is selected from TiN, TiCN and TiAIN, and the coating thickness is in the range of 0.5 to 50 μm;
- and
- wherein the tool is made of a material selected from HSS, HSCo, HSCoXP and solid carbide.
A bore cutting tool having
- a cutting edge,
- a rake face extending from one side of the cutting edge,
- a back face extending from the opposite side of the cutting edge to the rake face and
- a land,
- wherein the rake face is at least partially coated but the land and at least part of the back face are not coated;
- wherein the coating is selected from TiN, TiCN and TiAIN, and the coating thickness is in the range of 0.5 to 50 μm;
- and
- wherein the tool is made of a material selected from HSS, HSCo, HSCoXP and solid carbide.
A method of partially coating a bore cutting tool, the tool having a cutting edge, a rake face extending from one side of the cutting edge, a non-cutting back face extending from the opposite side of the cutting edge to the rake face, and a land, wherein the method includes the step of
- at least partially coating the rake face but not coating the land and at least part of the back face.
Dependencies are inferred from the claim text.