The National Shipbuilding Research Program. Automated Process Application in Steel Fabrication and Subassembly Facilities; Phase II (Process Comparison). PDF Download
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Author:
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Languages : en
Pages : 54
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Book Description
In an effort to produce cost competitive ships in a time of reduced Defense spending and dominance of the world commercial market by foreign yards. the American shipbuilding industry is investigating methods that will streamline production and reduce fabrication and assembly times. One such methods is the introduction of automation into steel fabrication and subassembly processes. Many of the processes in these areas are both labor intensive and repetitive. characteristics that are ideally suited to be handled by automation. The drawback, however, is the capital cost associated with automation especially when it is not known whether the automation will produce a positive return on the investment dollar. Computer simulation is being used in other manufacturing industries worldwide to gain insight into how the introduction of new resources affects the company's current manufacturing capabilities and whether or not the new resources will produce a positive return on investment.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
In an effort to produce cost competitive ships in a time of reduced Defense spending and dominance of the world commercial market by foreign yards. the American shipbuilding industry is investigating methods that will streamline production and reduce fabrication and assembly times. One such methods is the introduction of automation into steel fabrication and subassembly processes. Many of the processes in these areas are both labor intensive and repetitive. characteristics that are ideally suited to be handled by automation. The drawback, however, is the capital cost associated with automation especially when it is not known whether the automation will produce a positive return on the investment dollar. Computer simulation is being used in other manufacturing industries worldwide to gain insight into how the introduction of new resources affects the company's current manufacturing capabilities and whether or not the new resources will produce a positive return on investment.
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Category :
Languages : en
Pages : 15
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Book Description
The objective of NSRP Project 1-96-6 was to develop a methodology to identify specific processes within Steel Fabrication and Subassembly that were good candidates for automation, and to determine the degree and mix of automation which would have the best overall effect on the defined areas. Because of the large scope of the project, computer simulation was used to model the focus areas. Computer simulation lends itself well to investigations such as this because of software s capability to: Determine the effects of randomness and variability in the processes; Model large systems with many variables; Determine effects over long periods of time; Determine effects of costly changes before investing money and resources; Quickly produce results for comparisons of system changes; Present concepts visually as an aid in explaining them. Models were created that were representative of National Steel and Shipbuilding Company's (NASSCO) current Steel Fabrication and Subassembly processes. These As-Is models were then analyzed for bottlenecks and constraints that could be overcome through the use of automation. Once the constraints were identified and suitable automation alternatives were purposed, To-Be models were created incorporating the automation. The results of the As-Is and o-Be models were used in order to compare the performance of the two systems, and as a basis for a Return on Investment (ROI) calculation.
Author:
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Category :
Languages : en
Pages : 205
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Book Description
In an effort to produce cost competitive ships in a time of reduced Defense spending and dominance of the world commercial market by foreign yards, the American shipbuilding industry is investigating methods which will streamline production and reduce fabrication and assembly times.
Author:
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Category :
Languages : en
Pages : 14
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Book Description
Proceedings of the REAPS Technical Symposium. Paper No. 24: Group Technology and Automated Process Planning, a Change in Management Strategy. The trend toward increased customization is increasing the problems associated with batch manufacturing, both in design and manufacturing itself. Group technology helps to solve these problems and is thus attracting great interest. The benefits of group technology in such applications as design retrieval, design standardization, standardization of machine tool routings, automated process planning, and machine tool investment can bring about dramatic savings in the multibillion dollar manufacturing industry. Three or four years ago, only a handful of companies were interested in group technology. Today, many companies, including a number considered to be highly conservative, are seriously considering or have adopted group technology systems. This increased interest is a reflection of a growing awareness of the potential benefits of group technology, particularly for batch manufacturing. These advantages can apply to both design and manufacturing.
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Category :
Languages : en
Pages : 72
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The primary objective of this project was to design, install and evaluate an integrated semi-automatic pipe shop for the manufacture and assembly of shipboard piping systems. This facility will reduce the labor, material handling required and increase the flow through the system for a given space requirement and provide for storage as well as fabrication area. The project was conducted in such a way as to provide full viability to all U.S. shipyards during the design, installation. and evaluation phases. This was accomplished through Avondale's (ASI) interaction with Panel SP-1 of the Ship Production Committee as part of the National Shipbuilding Research Program. The magnitude of this project required subdividing the total project into sub-projects functionally oriented. During the project any one of the sub-projects could be developed independent of the other in respect to function, equipment, design or selection. Attention was given to sub-project interface to assure total project integration.
Author: University of Michigan Transportation Research Institute
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Author:
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ISBN:
Category : Shipbuilding
Languages : en
Pages : 150
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Author:
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ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Fabrication cost of ship piping systems is of a magnitude worthy of study, since it is roughly equal to one-fourth of the total hull cost of a ship. The primary objective of our study is to design a cost effective and automatic handling, method of fabricating pipe which will reduce the labor, material storage space and required fabrication area. We have concluded that automatic, pipe fabricating there is not a single total automatic, or semisystem available in the world today. Yet, most of the machines required for such systems are available in Europe, Japan, and the United States. We envision the use of a mini-computer, supported by a primary computer, which could utilize a digitizer or some other method to design, update and revise the various parts of the system.
Author: Division on Engineering and Physical Sciences
Publisher: National Academies Press
ISBN: 030905382X
Category : Technology & Engineering
Languages : en
Pages : 161
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Book Description
The U.S. shipbuilding industry now confronts grave challenges in providing essential support of national objectives. With recent emphasis on renewal of the U.S. naval fleet, followed by the defense builddown, U.S. shipbuilders have fallen far behind in commercial ship construction, and face powerful new competition from abroad. This book examines ways to reestablish the U.S. industry, to provide a technology base and R&D infrastructure sustaining both commercial and military goals. Comparing U.S. and foreign shipbuilders in four technological areas, the authors find that U.S. builders lag most severely in business process technologies, and in technologies of new products and materials. New advances in system technologies, such as simulation, are also needed, as are continuing developments in shipyard production technologies. The report identifies roles that various government agencies, academia, and, especially, industry itself must play for the U.S. shipbuilding industry to attempt a turnaround.
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Category :
Languages : en
Pages : 349
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Book Description
One of the key elements of the 1930's concept of Group Technology (OT) is the classification of individual parts into families of parts with similar attributes. Prior to the advent of zone construction in ship- building similar products, such as franes, floors and shell plates, were presented on separate drawings, which resulted in the grouping of similar materials on each drawing. The assembly process followed a similar logical pattern using each of the drawings in each stage of construction. The introduction of zone construction has applied these OT concepts to the unit assembly process. Computer Aided Process Planning (CAPP) and its requirement to organize manufacturing data in a logical, structured manner has brought the shipbuilding industry back to the GT concept in the structural fabrication shop . The subdivision of a ship into manageable subsets of interim products allows for the further grouping of interim products into families requiring similar manufacturing processes.
