# US 10,369,636 B2 · Machining tool and method for manufacturing a machining tool

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- Number: US 10,369,636 B2
- Document ID: US10369636B2
- Status: Granted
- Kind: B2
- Application number: 14/676,567
- Filed: 2015-04-01
- Published: 2015-10-22
- Granted: 2019-08-06
- Earliest claimed: 2014-04-17
- Assignees: Kennametal Inc.
- Applicants: Kennametal Inc.
- Inventors: Eduard Ach; Christoph Gey
- Web page: https://patentgrep.com/patent/US10369636B2

## CPC

- B23B 51/06: Drills with lubricating or cooling equipment {(B23B51/042 takes precedence)}
- B23C 5/28: Features relating to lubricating or cooling
- B23B 2251/02: Connections between shanks and removable cutting heads
- B23C 2210/03: Cutting heads comprised of different material than the shank irrespective of whether the head is detachable from the shank
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)

## Abstract

A machining tool, in the area of a tool tip, includes an integrated cooling structure for transporting a coolant. The cooling structure is optionally or in combination designed as a porous structure or at least one cooling channel having a bent reversing segment, so that two channel segments are oriented in opposite directions. The cooling structure is integrated into a base body of a carrier tool. According to a method of the invention, the cooling structure is manufactured by means of a 3D printing method.

## Claims

### Claim 1

A machining tool that extends in an axial direction along a rotational axis and comprising:
a tool tip;
a base body, the base body forming retaining webs between which a tool tip can be inserted and having an integrated cooling structure for conducting a coolant or lubricant, the cooling structure being integrated at least partly in the retaining webs; and
a chip flute formed in the base body, the chip flute having a chip flute wall,
wherein the cooling structure, at least in sections, is designed as a porous structure having a plurality of pores;
wherein at least a portion of the porous structure is located in the retaining webs of the base body and the porous structure exits at an outlet point provided on the chip flute wall; and
wherein the porous structure has a porosity ranging between 5% and 90%.

### Claim 2 (depends on 1)

The machining tool as claimed in claim 1, further comprising an outer cladding at which the porous structure exits at the outlet point.

### Claim 3 (depends on 1)

The machining tool as claimed in claim 1, wherein the outlet point is a planar outlet point.

### Claim 4 (depends on 1)

A method for manufacturing a machining tool as claimed in claim 1, wherein the machining tool is manufactured with an integrated cooling structure at least partially with the aid of a 3D printing method.

### Claim 5 (depends on 1)

The machining tool as claimed in claim 1, wherein the pores have an average pore size ranging between 15 and 45 μm.

### Claim 6 (depends on 1)

The machining tool as claimed in claim 1, wherein the pores of the porous structure are arranged in a honeycomb structure.

### Claim 7 (depends on 1)

The machining tool as claimed in claim 1, wherein the pores of the porous structure are arranged in a bionic, random structure.