Rotating tool, in particular drill, as well as a method for manufacturing a rotating tool of this type

Patent metadata

Field	Value
Publication number	US-9724765-B2
Application number	US-201514687076-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Apr 17, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The rotating tool, in particular a drill, includes a fluted cutting shank made of a resistant material, in particular carbide, extending in an axial direction along a rotational axis. Connecting to the cutting shank in the axial direction is an intermediate shank made of a material of greater elasticity in comparison the resistant material, in particular of tool steel. The intermediate shank includes an insertable cutting insert that may be exchanged. The cutting shank is preferably a cutting shank recycled from a used solid carbide drill.

First claim

What is claimed is:

1. A rotating tool, comprising:
a cutting shank made of a resistant material extending in an axial direction along a rotational axis and provided with chip flutes;
an intermediate shank which connects to the cutting shank in the axial direction and is made of a different material from the resistant material; and
a cutting insert which is interchangeably secured to the intermediate shank;
the intermediate shank comprising, at an end face thereof, clamping webs;
wherein the cutting insert is held clamped between the clamping webs.

2. The rotating tool as claimed in claim 1 , wherein the intermediate shank comprises an axial length (L) extending in axial direction, which axial length (L) ranges between 0.2 times and 1.5 times a nominal diameter (D) of the rotating tool.

3. The rotating tool as claimed in claim 1 , wherein the cutting shank is made from a previously used solid tool formed from the resistant material.

4. The rotating tool as claimed in claim 1 , wherein the chip flutes run along the cutting shank and continue in the intermediate shank.

5. The rotating tool as claimed in claim 1 , wherein the cutting shank is materially bonded to the intermediate shank.

6. The rotating tool as claimed in claim 1 , wherein the intermediate shank is welded to the cutting shank.

7. The rotating tool as claimed in claim 1 , wherein the intermediate shank is formed via selective layer-by-layer laser application.

8. The rotating tool as claimed in claim 1 , further comprising a connection surface between the cutting shank and the intermediate shank which, at least in partial sections, is tilted at an angle (α) other than 90° in relation to the axial direction.

9. The rotating tool as claimed in claim 8 , wherein the angle (α) lies in the range between 30° and 85°.

10. The rotating tool as claimed in claim 1 , further comprising a connection surface between the cutting shank and the intermediate shank which is profiled or roughened.

11. The rotating tool as claimed in claim 1 , wherein the cutting shank and the intermediate shank comprise coupling elements which engage with one another.

12. A method for manufacturing a rotating tool as claimed in claim 1 , via:
providing the cutting shank made of a resistant material;
connecting the intermediate shank to the cutting shank; and
securing the cutting insert to the intermediate shank.

13. The method as claimed in claim 12 , wherein providing the cutting shank comprises:
providing a previously used solid tool formed from the resistant material; and
removing a front tip of the solid tool.

Assignees

• Kennametal Inc

Inventors

• Ach Eduard
• Jäger Horst Manfred
• Rosenberger Fabian

Classifications

• Y10T408/907

  including detailed shank · CPC title

• B23B2251/62

  Drilling tools having means to reinforce the shank, e.g. drills having small shanks being gripped by devices having a larger shank · CPC title

• B23P15/32

  twist-drills · CPC title

• B23B51/02 Primary

  Twist drills · CPC title

• B23B2240/16

  Welded connections · CPC title