Featured Research

from universities, journals, and other organizations

"Cutting"-Edge Technology To Better Shape Submarine Propellers

Date:
May 16, 2002
Source:
National Institute Of Standards And Technology (NIST)
Summary:
Super smooth propellers of maximum structural integrity allow submarines to run silently in deep water. These nickel-aluminum-bronze alloy propulsion units take as long as 12 months to manufacture—a production time that the US Navy feels is too long. So, National Institute of Standards and Technology (NIST) high-speed machining experts are working with the US Navy and the University of North Carolina at Charlotte (UNCC) on a new machine tool and special metal-cutting strategies to decrease that time to four months.

Super smooth propellers of maximum structural integrity allow submarines to run silently in deep water. These nickel-aluminum-bronze alloy propulsion units take as long as 12 months to manufacture—a production time that the US Navy feels is too long. So, National Institute of Standards and Technology (NIST) high-speed machining experts are working with the US Navy and the University of North Carolina at Charlotte (UNCC) on a new machine tool and special metal-cutting strategies to decrease that time to four months.

Related Articles


A submarine propeller begins life as a greater than six-meter (20-foot) diameter, 50,000-kilogram (55-ton) metal casting. It must be machined down to a mass near 37,000 kilograms (41 tons) in its final form. Current machining methods leave the propeller with a rough surface, which if left unchanged, would betray a submarine’s movements in the ocean. So, months of hand finishing are required.

"Such a time-consuming process may soon be a thing of the past," said Tony Schmitz, a NIST engineer working on the project. "NIST’s tool wear and surface finishing experiments have led to a better understanding of the required parameters for high-speed machining of the propeller alloy. These discoveries have enabled us to increase the material removal rate during machining by a factor of 10. Additionally, refinements in the paths that the tool follows during metal cutting promise to substantially reduce roughness in the final milled propeller surface."


Story Source:

The above story is based on materials provided by National Institute Of Standards And Technology (NIST). Note: Materials may be edited for content and length.


Cite This Page:

National Institute Of Standards And Technology (NIST). ""Cutting"-Edge Technology To Better Shape Submarine Propellers." ScienceDaily. ScienceDaily, 16 May 2002. <www.sciencedaily.com/releases/2002/05/020514072610.htm>.
National Institute Of Standards And Technology (NIST). (2002, May 16). "Cutting"-Edge Technology To Better Shape Submarine Propellers. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2002/05/020514072610.htm
National Institute Of Standards And Technology (NIST). ""Cutting"-Edge Technology To Better Shape Submarine Propellers." ScienceDaily. www.sciencedaily.com/releases/2002/05/020514072610.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

AFP (Nov. 21, 2014) Toyota presented its hydrogen fuel-cell compact car called "Mirai" to US consumers at the Los Angeles auto show. The car should go on sale in 2015 for around $60.000. It combines stored hydrogen with oxygen to generate its own power. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
Raw: Paralyzed Marine Walks With Robotic Braces

Raw: Paralyzed Marine Walks With Robotic Braces

AP (Nov. 21, 2014) Marine Corps officials say a special operations officer left paralyzed by a sniper's bullet in Afghanistan walked using robotic leg braces in a ceremony to award him a Bronze Star. (Nov. 21) Video provided by AP
Powered by NewsLook.com
British 'Bio-Bus' Is Powered By Human Waste

British 'Bio-Bus' Is Powered By Human Waste

Buzz60 (Nov. 21, 2014) British company GENeco debuted what its calling the Bio-Bus, a bus fueled entirely by biomethane gas produced from food scraps and sewage. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins