Tool holder having improved internal coolant delivery

Patent metadata

Field	Value
Publication number	US-9586263-B2
Application number	US-201414296785-A
Country	US
Kind code	B2
Filing date	Jun 5, 2014
Priority date	Jun 5, 2014
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A tool holder for carrying a cutting insert wherein the cutting insert is useful for the removal of material during a material removal operation. The tool holder includes a tool holder body. The tool holder body includes a pocket adapted to carry the cutting insert, a coolant inlet in communication with a pressurized source of coolant, a coolant chamber having a central region, an upstream coolant passage having a central longitudinal upstream coolant passage axis, and a downstream coolant passage having a central longitudinal downstream coolant passage axis. The upstream coolant passage opens into the coolant chamber. The upstream coolant passage has an orientation relative to the coolant chamber so that the central longitudinal upstream coolant passage axis is offset from the central region of the coolant chamber whereby coolant flows into the coolant chamber in a tangential fashion.

First claim

What is claimed:

1. A tool holder for carrying a cutting insert wherein the cutting insert is useful for the removal of material during a material removal operation, the tool holder comprising:
a tool holder body comprising: a pocket adapted to carry the cutting insert, a coolant inlet in communication with a pressurized source of coolant, a coolant chamber having a central region, an upstream coolant passage having a central longitudinal upstream coolant passage axis;
a plurality of downstream coolant passages wherein each downstream coolant passage has a central longitudinal downstream coolant passage axis, each of the downstream coolant passages terminating in an opening; and
the upstream coolant passage opening into the coolant chamber, and the upstream coolant passage having an orientation relative to the coolant chamber so that the central longitudinal upstream coolant passage axis is offset from the central region of the coolant chamber whereby coolant flows into the coolant chamber in a tangential fashion;
wherein each of the downstream coolant passages receives coolant from the coolant chamber, and each of the downstream coolant passages having an orientation relative to the coolant chamber so that the central longitudinal downstream coolant passage axis of each downstream coolant passage is offset from the central region of the coolant chamber whereby coolant flows into each one of the downstream coolant passages in a tangential fashion; and
wherein the coolant chamber is defined by a coolant chamber wall wherein at least a portion of the coolant chamber wall is a generally arcuate wall portion that redirects coolant flowing into the coolant chamber so as to directly enter each one of the downstream coolant passages.

2. The tool holder according to claim 1 wherein the coolant chamber is cylindrical in shape, and the coolant chamber having a cylindrical wall and two opposite flat end walls.

3. The tool holder according to claim 2 wherein the upstream coolant passage opening into the coolant chamber at a location approximately mid-way between the opposite flat walls.

4. The tool holder according to claim 2 wherein the upstream coolant passage has a tangential relationship with the adjacent portion of the coolant chamber wall, and each of the downstream coolant passages has a tangential relationship with the adjacent portions of the coolant chamber wall.

5. The tool holder according to claim 2 comprising a central downstream coolant passageway, and one lateral downstream coolant passageway on one side of the central downstream coolant passageway and another lateral downstream coolant passageway on the other side of the central downstream coolant passageway.

6. The tool holder according to claim 5 wherein the one lateral downstream coolant passage being spaced apart from one adjacent flat end wall, and the other lateral downstream coolant passage being spaced apart from other adjacent flat end wall, and the central downstream coolant passage being mid-way between the flat end walls.

7. A tool holder for carrying a cutting insert wherein the cutting insert is useful for the removal of material during a material removal operation, the tool holder comprising:
a tool holder body comprising: a pocket adapted to carry the cutting insert, a coolant inlet in communication with a pressurized source of coolant, a coolant chamber having a central region, an upstream coolant passage having a central longitudinal upstream coolant passage axis;
a central downstream coolant passageway having a central nozzle attached thereto wherein the central nozzle has a central nozzle passage, and one lateral downstream coolant passageway on one side of the central downstream coolant passageway and the one lateral downstream coolant passage having one lateral nozzle attached thereto wherein the one lateral nozzle has a one lateral nozzle passage, and another lateral downstream coolant passageway on the other side of the central downstream coolant passageway and the another lateral downstream coolant passage having other nozzle attached thereto wherein the other lateral nozzle having other nozzle passage;
the upstream coolant passage opening into the coolant chamber, and the upstream coolant passage having an orientation relative to the coolant chamber so that the central longitudinal upstream coolant passage axis is offset from the central region of the coolant chamber whereby coolant flows into the coolant chamber in a tangential fashion.

Assignees

• Kennametal Inc
• Kennametal Inc

Inventors

• Frota De Souza Filho Ruy
• Hiles Calvin L

Classifications

• B23B27/10 Primary

  Cutting tools with special provision for cooling {(drills with lubricating or cooling equipment B23B51/06; features relating to lubricating or cooling of milling cutters B23C5/28; arrangements or devices for cooling or lubricating tools or work B23Q11/10)} · CPC title

• Y10T407/14

  with means to apply fluid to cutting tool · CPC title

• B23B29/12

  Special arrangements on tool holders · CPC title

• B23B2250/12

  Cooling and lubrication · CPC title