Category: Surface Ship Platform

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Hull Fairness & Accuracy Control

Project Participants: Northrop Grumman Shipbuilding-Gulf Coast Project Start: November 2007 Hull fairness/flatness and accuracy control requirements for DDG-1000 create a unique production challenge for Northrop Grumman Shipbuilding-Gulf Coast (NGSB-GC). Currently there is no technology solution that would meet these restrictive fairness fabrication requirements as they are more stringent than requirements for DDG‑51. With the DDG‑1000 […]

Internal Supply Chain

Project Participants: Marinette Marine Corporation Project Start: December 2006 Marinette Marine Corporation (MMC), a subsidiary of The Manitowoc Company Inc., is currently designing and building vessels for the U.S. Navy, the U.S. Coast Guard and commercial customers. The U.S. Navy work includes construction of the first Littoral Combat Ship (LCS) and the Improved Navy Lighterage […]

Nested Material Manufacturing Technology Improvement

Project Participants: National Steel and Shipbuilding Company (NASSCO) Project Start: February 2006 As shipyards struggle to improve fabrication process efficiency, especially pipe fabrication, there is increased reliance on automated fabrication machines and processes. Planning and routing decisions, whether manual or automated must account for variables in individual process times, work station capacities, emerging engineering design […]

Thermal Tensioning of Thin Steel Ship Panel Structures

Project Participants: Northrop Grumman Shipbuilding Project Start: June 2005 Several current U.S. Navy construction programs are experiencing high rates of distortion and buckling on thin steel structures. The standard shipyard practice of fabricating stiffened steel panels by arc welding causes heat-induced buckling and angular distortion. Correcting the distortion is a necessary but time-consuming operation that […]

Re-engineering the Internal Supply Chain/Material Delivery Process

Project Participants: Northrop Grumman Shipbuilding Project Start: November 2004 Misplacement or loss of material and data in a ship-focused organization can create considerable disruption in the workflow. The details of where the material/data is needed and when needed are critical to the successful completion of the vessel and to control construction costs. Misplaced material can […]

A Technical Training and Data Collection Program for Structural Welders and Fitters

Project Participants: Northrop Grumman Shipbuilding Project Start: November 2004 With an aging work force and the perception that manufacturing jobs are less desirable, highly skilled structural welders become more difficult to find and retain. This causes the information associated with quality standards and dimensional tolerances to pass to craft management and internal inspection agencies. The […]

Laser/GMA Hybrid Pipe Welding System

Project Participants: Penn State Applied Research Laboratory Project Start: November 2004 The objectives of this project are to design and build and demonstrate a hybrid laser/gas metal arc (GMA) pipe welding system and demonstrate it in the laboratory and the shipyard. This system is attractive because it generates significant cost savings by eliminating the multiple […]

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