video posted<\/a>\u00a0to the HII website. Ralls started exploring 3D printing for shipbuilding about six years ago, he said in the video.<\/p>\n![\"\"](\"https:\/\/news.usni.org\/wp-content\/uploads\/2018\/10\/Screen-Shot-2018-10-12-at-3.25.36-PM.png\")
<\/p>\n
\u201cIf you asked me ten years ago, would I be working on taking powderized metal and lasers to make a part in three-dimensional shapes, I don\u2019t think I could have envisioned that at all,\u201d Ralls said.<\/p>\n
HII describes the 3D printing process approved by NAVSEA as \u201ca highly digitized process that deposits metal powder, layer by layer, to create three-dimensional marine alloy parts that potentially replace castings or other fabricated parts, such as valves, housings, and brackets.\u201d<\/p>\n
The Navy also hopes 3D-printed parts will prove to be a way to supply the fleet quicker, cheaper and more efficiently. The particular drain strainer orifice installed on\u00a0Truman<\/em>\u00a0will be monitored for a year to evaluate how well the part performs in a real-world working environment, according to a NAVSEA statement.<\/p>\n![\"\"](\"https:\/\/news.usni.org\/wp-content\/uploads\/2018\/10\/Screen-Shot-2018-10-12-at-11.16.39-AM.png\")
<\/p>\n
\u201cThis install marks a significant advancement in the Navy\u2019s ability to make parts on demand and combine NAVSEA\u2019s strategic goal of on-time delivery of ships and submarines while maintaining a culture of affordability,\u201d Rear Adm. Lorin Selby, the NAVSEA Chief Engineer and Deputy Commander for Ship Design, Integration, and Naval Engineering, said in a statement.<\/p>\n
Meanwhile, the Navy in the process of understanding how to safely apply additive manufacturing technologies in more ways, including as part of the supply chain for aircraft carriers at sea.<\/p>\n
\u201cSpecifications will establish a path for NAVSEA and industry to follow when designing, manufacturing and installing AM (additive manufacturing) components shipboard and will streamline the approval process,\u201d Justin Rettaliata, the Technical Warrant Holder for Additive Manufacturing with NAVSEA, said in a statement.<\/p>\n
Two recent additive manufacturing efforts led the former in-service carrier program manager at the Program Executive Office for Carriers to decide the Navy should install a 3D printing lab aboard USS\u00a0George Washington<\/em>\u00a0(CVN-73) during its ongoing mid-life refueling and complex overhaul.<\/p>\nCapt. John Markowicz, who until this summer served as the in-service carrier program manager, told USNI News in a May interview that the Naval Surface Warfare Center Carderock Division had worked to understand how a 3D printer would operate at sea, on a structure constantly in motion.<\/p>\n
Meanwhile, the chief engineer aboard USS\u00a0J<\/em>ohn C. Stennis<\/em>\u00a0(CVN-74) was already experimenting with how to use 3D printing as a way to shorten the supply chain for the ship\u2019s industrial maintenance, Markowicz said.<\/p>\nIn August, Arleigh Burke-class guided-missile destroyer USS\u00a0Chung-Hoon<\/em>\u00a0(DDG-93) needed to replace a bolt from a hangar bay door roller assembly. Cmdr. Kenneth Holland, the chief engineer aboard\u00a0Stennis<\/em>, offered to make a replacement bolt for\u00a0Chung-Hoon,<\/em>\u00a0which was part of the Stennis Carrier Strike Group.<\/p>\n\u201cThe printers are being used right now to resolve issues while they\u2019re small problems,\u201d Holland said in a statement released shortly after the event. \u201cIt\u2019s used to help manufacture parts that you can generally only get if you buy the higher assembly.\u201d<\/p>\n
Holland and his team aboard\u00a0Stennis<\/em>\u00a0have made replacement knobs for communications gear and other small components, according to the Navy. Currently, small manufacturing jobs are the most likely jobs 3D printing can accomplish at sea, Markowicz said during his May interview with USNI News.<\/p>\nMore work has to be done for the Navy to understand what standards required for different kinds of parts and the limitations of 3D printing. When it comes to parts for critical systems, Markowicz said shipboard labs might never be approved to create such items as parts of steam propulsion systems. A shipboard facility doesn\u2019t have the means to test and certify parts like a shipyard facility.<\/p>\n
However, Markowicz said a shipboard lab could print something like a pump shaft with plastic or Teflon first, test fit it on the ship, and then re-print the piece with metal for actual use on the ship.<\/p>\n
Fuente:<\/strong>\u00a0https:\/\/news.usni.org<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"Una peque\u00f1a pieza\u00a0de drenaje se instalo en el porta avinoes del\u00a0\u00a0USS Harry S. Truman (CVN-75) cabe en la palma de una mano, pero su importancia… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[2,29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/3351"}],"collection":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3351"}],"version-history":[{"count":0,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=\/wp\/v2\/posts\/3351\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fie.undef.edu.ar\/ceptm\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}