Cutting Tool Made by Additive Manufacturing

Patent metadata

Field	Value
Publication number	US-2016332236-A1
Application number	US-201514710644-A
Country	US
Kind code	A1
Filing date	May 13, 2015
Priority date	May 13, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A cutting tool made by an additive manufacturing process is disclosed. The cutting tool has an exterior surface and an enclosed interior cavity defined by one or more inwardly facing surfaces. The interior cavity may have internal supports such as a lattice or a honeycomb structure. The cutting tool may be an insert, drill or endmill with coolant holes.

First claim

That which is claimed is:

1 . A cutting tool comprising:
an exterior surface and an enclosed interior cavity defined by one or more inwardly facing surfaces.

2 . The coated cutting tool of claim 1 further comprising one or more lattice structures within and supporting the interior cavity.

3 . The coated cutting tool of claim 2 , wherein the cutting tool comprises cemented tungsten carbide.

4 . The coated cutting tool of claim 1 , further comprising:
a rake face; a flank face; a cutting edge at the intersection of the rake face and flank face.

5 . The coated cutting tool of claim 4 , the rake face, a flank face or another surface containing a coolant inlet and wherein the rake face includes coolant discharge holes adjacent the cutting edge.

6 . The coated cutting tool of claim 1 , further comprising a PVD or CVD coating on at least the rake or flank face.

7 . The coated cutting tool of claim 1 , wherein the cutting tool is a cutting insert, a drill, a reamer or an endmill.

8 . A method of producing a cutting tool comprising:
producing a green cutting tool having an internal cavity from a starting powder using a binder jetting process; debinding and sintering the cutting tool.

9 . The method of producing a cutting tool of claim 8 wherein the starting powder comprises tungsten carbide and cobalt.

10 . The method of claim 8 , further comprising hot isostatic pressing (HIP) the cutting tool after sintering.

11 . A method of producing a cutting tool comprising:
producing a tool having an internal cavity from a starting powder using a selective laser sintering process.

12 . The method of producing a cutting tool of claim 11 wherein the starting powder comprises tungsten carbide and cobalt.

Assignees

• Stoyanov Pantcho
• Kennametal Inc

Inventors

• Stoyanov Pantcho

Classifications

• B22F10/14

  by jetting of binder onto a bed of metal powder · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/66

  by mechanical means · CPC title

• C22C1/051

  Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title