A Novel Indirectly Cooled Broaching System (ICBS)

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$99,970.00
Award Year:
2012
Program:
SBIR
Phase:
Phase I
Contract:
W911QX-12-C-0086
Agency Tracking Number:
A121-014-0291
Solicitation Year:
2012
Solicitation Topic Code:
A12-014
Solicitation Number:
2012.1
Small Business Information
Creare Inc.
P.O. Box 71, Ha, NH, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
072021041
Principal Investigator:
Jay Rozzi, Ph.D.
Principal Engineer
(603) 643-3800
jcr@creare.com
Business Contact:
James Barry
President
(603) 643-3800
contractsmgr@creare.com
Research Institution:
n/a
Abstract
Tantalum alloy and silicon nitride gun barrel liners have demonstrated excellent corrosion resistance and wear characteristics for U.S. Army applications. The quality and accuracy of the rifling profile is critical; however, the processes and tooling needed to successfully rifle a gun barrel made from these advanced materials have not been developed due to the difficulty of machining the materials. Tantalum and its alloys possess a gummy consistency, low thermal conductivity, and low specific heat. These elements combine to increase the cutting forces in the machining zone, thus causing the material to weld to the cutting edge during machining and gall. In the case of silicon nitride, the extremely high hardness of the ceramic material precludes the use of conventional broaching operations due to high tool wear, catastrophic failure of the part, or poor machined surface quality. Creare"s innovation is an Indirectly Cooled Broaching System (ICBS) that combines a progressive broaching tool with our proven Indirect Cooling System (ICS) to enable effective and accurate rifling of advanced material gun barrel liners. We anticipate that our innovation will reduce cutting forces, increase quality, and extend tool life, thus enabling the best technology to be affordably delivered to the U.S. warfighter.

* information listed above is at the time of submission.

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