The Establishment and Management of a Production Data Exchange Group

2005 ◽  
Vol 21 (02) ◽  
pp. 73-80
Author(s):  
Gregory F. Morea
Keyword(s):  
Data Exchange ◽  
Production Data ◽  
Computer Assisted ◽  
Product Model ◽  
Aircraft Carrier ◽  
Exchange Group ◽  
Digital Format ◽  
Marine Industry ◽  
The Future ◽  
Design And Construction

The design and construction of any marine vessel designed on a computer-assisted design (CAD) system, from a nuclear aircraft carrier to the smallest work boat, requires the interaction of many electronic databases, all of which must be continually updated for the work to proceed. The exchange of this information, especially geometry, in digital format is accomplished using many different tools and techniques. Much has been presented to the marine community about the tools used, such as the Initial Graphics Exchange Specification (IGES) and the Standard for the Exchange of Product Model Data (STEP), and how these tools might be used for exchanges in the future, but little has been presented on how production data exchanges actually occur. At Electric Boat, current submarine programs cannot wait for future data transfer solutions. Design and construction data must be exchanged among various activities, internal and external, with such volume as to make manual reentry of data an unrealistic solution. Because of the complexities associated with the electronic exchange of these data, the General Dynamics (GD) Marine organization of Electric Boat has a dedicated group that both performs production data exchanges and researches and implements new methods of electronic transfer. This paper discusses the rationale for and the formation of the data exchange group at Electric Boat, along with its place within GD Marine. It then presents an overview of the tools used by the group and how production transfers occur, both routine and unique. Notable transfers provide examples of how the group works to solve transfer problems. Importantly, this paper shows how many of the exchange standards developed for the marine industry actually work in production. Special emphasis will be placed on the exchange of solid models in a day-to-day environment. The paper concludes with a look at the future of production data exchanges for Electric Boat and the larger marine industry.

A Contribution to CAE System Integration in Ship Design

2005 ◽  
Author(s):  
Robert Bronsart ◽  
Ulf Cantow ◽  
Wiegand Grafe ◽  
Thomas Koch ◽  
Bryan J. Miller
Keyword(s):  
System Integration ◽  
Data Exchange ◽  
Mechanical Design ◽  
Ship Design ◽  
Business Success ◽  
Production Data ◽  
Analysis Tool ◽  
Product Model ◽  
Cae System ◽  
Design And Production

The integration of software tools used in design and production of commercial ships is regarded a key issue with respect to product optimization and overall business success. To overcome this problem CAE-systems are integrated with help of adapters to a networked information infrastructure. The overall system architecture is outlined and the underlying ERM is discussed to show the complexity of a product model suitable to support ship design and production. Data exchange scenarios are described which demonstrate the integration of different shipbuilding specific systems: e.g. NAPA Steel and the analysis tool POSEIDON by Germanischer Lloyd. The implementation of an adapter supporting the STEP protocol AP214 (Core data for automotive mechanical design processes) serves to show the potential of this well supported protocol in the shipbuilding context.

NIDDESC—Enabling Product Data Exchange for Marine Industry

1994 ◽  
Vol 10 (01) ◽  
pp. 24-30
Author(s):  
James Murphy
Keyword(s):  
Data Exchange ◽  
Production Control ◽  
Life Support ◽  
Design Tool ◽  
Digital Data ◽  
Model Data ◽  
Product Model ◽  
Product Data ◽  
Information Base ◽  
Marine Industry

The use of computer-aided design (CAD) technology in the U.S. Navy and marine industry has evolved from a drafting-based design tool to a three-dimensional (3D) product-oriented information base, used for design, production and service life support. One of the most significant enhancements to current CAD technology has been the incorporation or integration of non-graphic attribute information with traditional graphics data. This expanded information base or product model has enabled the marine industry to expand CAD use to include such activities as engineering analysis, production control, and logistics support. While significant savings can be achieved through the exchange of digital product model data between different agents, current graphics-based CAD data exchange standards do not support this expanded information content. The Navy/Industry Digital Data Exchange Standards Committee (NIDDESC) was formed as a cooperative effort of the Naval Sea Systems Command (NAVSEA) and the National Shipbuilding Research Program to develop an industry consensus on product data and to ensure these industry requirements are incorporated into national and international data exchange standards. The NIDDESC effort has resulted in the development of a suite of product model specifications or application protocols (APs) defining marine industry product model data. These APs have been submitted for inclusion into the next generation of data exchange standards.

Semantic Interoperability of GD&T Data Through ISO 10303 Step AP242

2016 ◽  
Author(s):  
Adarsh Venkiteswaran ◽  
Sayed Mohammad Hejazi ◽  
Deepanjan Biswas ◽  
Jami J. Shah ◽  
Joseph K. Davidson
Keyword(s):  
Data Exchange ◽  
Smart Manufacturing ◽  
Context Model ◽  
Product Model ◽  
Shape Information ◽  
Computer Aided Process Planning ◽  
Model Based ◽  
Computer Aided ◽  
Iso 10303 ◽  
Manufacturing Applications

Industries are continuously trying to improve the time to market through automation and optimization of existing product development processes. Large companies vow to save significant time and resources through seamless communication of data between design, manufacturing, supply chain and quality assurance teams. In this context, Model Based Definition/Engineering (MBD) / (MBE) has gained popularity, particularly in its effort to replace traditional engineering drawings and documentations with a unified digital product model in a multi-disciplinary environment. Widely used 3D data exchange models (STEP AP 203, 214) contains mere shape information, which does not provide much value for reuse in downstream manufacturing applications. However, the latest STEP AP 242 (ISO 10303-242) “Managed model based 3D engineering” aims to support smart manufacturing by capturing semantic Product Manufacturing Information (PMI) within the 3D model and also helping with long-term archival. As a primary, for interoperability of Geometric Dimensions & Tolerances (GD&T) through AP 242, CAx Implementor Forum has published a set of recommended practices for the implementation of a translator. In line with these recommendations, this paper discusses the implementation of an AP 203 to AP 242 translator by attaching semantic GD&T available in an in-house Constraint Tolerance Graph (CTF) file. Further, semantic GD&T data can be automatically consumed by downstream applications such as Computer Aided Process Planning (CAPP), Computer Aided Inspection (CAI), Computer Aided Tolerance Systems (CATS) and Coordinate Measuring Machines (CMM). Also, this paper will briefly touch base on the important elements that will constitute a comprehensive product data model for model-based interoperability.

Computer-assisted database indexing: the state-of-the-art

1994 ◽  
Vol 19 (1) ◽  
pp. 23-27
Author(s):  
Gail M. Hodge
Keyword(s):  
Data Base ◽  
Production System ◽  
State Of The Art ◽  
The State ◽  
Computer Support ◽  
Computer Assisted ◽  
Computer Assistance ◽  
The Future ◽  
Database Indexing ◽  
Operational Systems

Discusses the state-of-the-art in computer indexing, defines indexing and computer assistance, describes the reasons for renewed interest, identifies the types of computer support in use using selected operational systems, describes the integration of various computer supports in one data base production system, and speculates on the future.

scholarly journals Rapid prototyping of a complex model for the manufacture of plaster molds for slip casting ceramic

Cerâmica ◽  
2014 ◽  
Vol 60 (356) ◽  
pp. 465-470 ◽  
Author(s):  
D. P. C. Velazco ◽  
E. F. Sancet ◽  
F. Urbaneja ◽  
M. Piccico ◽  
M. F. Serra ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
New Technologies ◽  
Slip Casting ◽  
Complex Model ◽  
Computer Assisted ◽  
Plaster Mold ◽  
Digital Format ◽  
Wide Range ◽  
3D Scanners ◽  
Ceramic Manufacturing

Computer assisted designing (CAD) is well known for several decades and employed for ceramic manufacturing almost since the beginning, but usually employed in the first part of the projectual ideation processes, neither in the prototyping nor in the manufacturing stages. The rapid prototyping machines, also known as 3D printers, have the capacity to produce in a few hours real pieces using plastic materials of high resistance, with great precision and similarity with respect to the original, based on unprecedented digital models produced by means of modeling with specific design software or from the digitalization of existing parts using the so-called 3D scanners. The main objective of the work is to develop the methodology used in the entire process of building a part in ceramics from the interrelationship between traditional techniques and new technologies for the manufacture of prototypes. And to take advantage of the benefits that allow us this new reproduction technology. The experience was based on the generation of a complex piece, in digital format, which served as the model. A regular 15 cm icosahedron presented features complex enough not to advise the production of the model by means of the traditional techniques of ceramics (manual or mechanical). From this digital model, a plaster mold was made in the traditional way in order to slip cast clay based slurries, freely dried in air and fired and glazed in the traditional way. This experience has shown the working hypothesis and opens up the possibility of new lines of work to academic and technological levels that will be explored in the near future. This technology provides a wide range of options to address the formal aspect of a part to be performed for the field of design, architecture, industrial design, the traditional pottery, ceramic art, etc., which allow you to amplify the formal possibilities, save time and therefore costs when drafting the necessary and appropriate matrixes to each requirement.

Approach to Amalgamation of Green Spaces and Emergency Shelters — Thinking after Wenchuan Earthquake

2011 ◽  
Vol 368-373 ◽  
pp. 1819-1822
Author(s):  
Dong Xiang Hu ◽  
Jun Tang
Keyword(s):  
Wenchuan Earthquake ◽  
Green Spaces ◽  
City Development ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Emergency Shelters ◽  
The Future ◽  
Design And Construction

This paper discusses the possibility of amalgamation of urban green spaces and emergency shelters, according to their characters of design and construction with the recent earthquake tendency. The approach to amalgamation of them have been suggested, which is suitable for city development of China. Those are the references to research and construction of emergency shelters in urban green spaces in the future.

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