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原文传递 Development of an Ultralight Pulse Gas Metal ARC Welding System for Shipyard Applications.

题名：	Development of an Ultralight Pulse Gas Metal ARC Welding System for Shipyard Applications.
作者：	fichtelberg, n. d.
关键词：	metals, jobs, structures, shielding, welding, conduits, shipyards, torches, manual operation, access, welds, costs
摘要：	A significant cost in shipbuilding is setup during unit erection and outfitting to support welding operations. For small welding jobs such as hanger and tack welding, the labor associated with equipment relocation and setup can be a large part of the total cost of welding. This is primarily due to the need to move large and cumbersome welding equipment and cables through confined structures. As a result, many hangers and other light-duty welding tasks are carried out aboard ship using the shielded metal arc welding (SMAW) process ( stick welding). This manual process is relatively slow, discharges considerable fume, requires removal of welding slag and electrode stubs, and may have lower welder appeal compared to the semi-automatic pulse gas metal arc welding (PGMAW) process. During certain phases of construction, it has not been economical to weld all hangers with PGMAW because of the high amount of labor required to move the cumbersome welding equipment around the boat. Additionally, shipboard space restrictions frequently interfere with power supply placement and accessibility for the PGMAW wire feeder, wire conduit, and welding torch. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0725；40p
报告类型：	科技报告