Home » Archive by Category "Completed Projects" (Page 6)

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 […]

Digital Radiography- An Alternative to Film Radiography

Project Participants: Northrop Grumman Shipbuilding- Newport News Project Start: November 2004 The current film-based radiographic inspection process uses expensive, non-reusable film and chemicals that contain materials (silver) that are potentially hazardous to the environment and wastes thousands of gallons of water every year. This film-based inspection process is also very cycle-time intensive, requiring manual handling […]

Weld Distortion Prediction Software for Submarine Construction

Project Participants: General Dynamics Electric Boat Project Start: November 2004 The costs required to effectively deal with weld distortion and/or correct the resulting negative effects are significant during submarine construction. Weld distortion impacts the fabrication costs of all welded parts, however, the larger the structure, the greater the impact on construction schedule. What are absent […]

Predictive Weld Distortion in Thick Navy Structures

Project Participants: Northrop Grumman Shipbuilding-Newport News Project Start: November 2004 SShipbuilders often use heat addition (flame straightening) to remove the distortion caused by welding. This labor and time intensive method affects product cost and schedule and is a complicated trial-and-error solution method. Experience can reduce the number of iterations to the solution, but the number […]

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 […]

High Heat Input Welding of Thick HSLA-100 with Reduced Pre-heat

Project Participants: Northrop Grumman Shipbuilding-Newport News Project Start: August 2004 This Northrop Grumman Shipbuilding – Newport News project was performed to determine the feasibility of joining HSLA-100 with 60°F preheat using high heat inputs with both the mechanized pulsed Gas Metal Arc Welding (GMAW-P) and SAW processes. The project was divided into three phases, the […]

Wireless Automated Diagnostic/Prognostics

Project Participants: Northrop Grumman Shipbuilding-Newport News Project Start: July 2004 Automated Diagnostic and Prognostic (ADP) systems can be used as a means both to reduce Preventive Maintenance and to predict when Corrective Maintenance on plant equipment will be required. This involves robust current condition diagnostics and future condition prognostics capabilities. These capabilities are rapidly emerging […]

Ultralight Pulse Gas Metal Arc Welding for Shipyard Applications

Project Participants: General Dynamics Electric Boat Project Start: June 2004 Set-up costs associated with welding operations that support unit erection and outfitting represent a significant portion of overall shipbuilding costs. 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 […]

Product-Centric Facility Design

Project Participants: General Dynamics Electric Boat Project Start: June 2004 The objective of this Electric Boat (EB)-led project was to re-engineer the structural fabrication processes of the total enterprise that affects the building of major structural assemblies in order to significantly reduce the construction schedule of Virginia Class Submarines (VCS). EB used a product-centric approach, […]