NIST collaboration to increase machining productivity for U.S. Navy. (News Briefs).NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. has been collaborating with the Naval Surface Warfare Center Noun 1. Naval Surface Warfare Center - the agency that provides scientific and engineering and technical support for all aspects of surface warfare NSWC , Carderock, MD, and the Naval Foundry and Propeller propeller, device consisting of a hub with one or more blades that propels a craft to which it is attached by rotating its blades in a fluid such as air or water. Center, Philadelphia, PA, since 1999. This collaboration resulted in significant advancements in the understanding of process dynamics during high speed machining and the optimization of machining process parameters for cutting the nickel-aluminum-bronze material of interest to the Navy. Submarine propellers are roughly 6 meters in diameter and 2 meters deep. Currently, production costs for a single propeller are about $1.6 million and the production takes about 12 months. The goal of the joint effort is to decrease the production time for a propeller down to 4 months. NIST results to date have achieved a 10 fold increase in material removal rate during the machining operations of the propeller--a significant improvement in machining productivity for the U.S. Navy. NIST results also form much of the technical basis for the procurement The fancy word for "purchasing." The procurement department within an organization manages all the major purchases. and expected operation of the new Navy system. In addition, a NIST scientist completed dynamic measurements of a representative high-speed spindle spindle: see spinning. A rotating shaft in a disk drive. In a fixed disk, the platters are attached to the spindle. In a removable disk, the spindle remains in the drive. Laptops use spindle designations to indicate the number of built-in drives. to be used with a NIST-developed algorithm, called receptance coupling substructure substructure /sub·struc·ture/ (-struk-chur) the underlying or supporting portion of an organ or appliance; that portion of an implant denture embedded in the tissues of the jaw. sub·struc·ture n. analysis, to select the appropriate tooling and machining parameters prior to delivery of the machine. This result will reduce the development time typically required when manufacturing a new part on a newly installed machine. CONTACT: Tony Schmitz, (301) 975-8346; tony.schmitz@nist.gov. |
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