Modeling of Feature-Based Design Process

1998 ◽  
Author(s):  
Fei Gao ◽  
Dieter Roller
Keyword(s):  
Design Process ◽  
Data Exchange ◽  
Concurrent Design ◽  
Product Model ◽  
Product Data ◽  
Product Models ◽  
Critical Issues ◽  
Feature Based ◽  
Feature Based Design ◽  
Feature Evolution

Abstract Capturing design process is becoming an important topic of feature-based modeling, as well as in product data exchange, concurrent design, and cooperative design. Three critical issues on the modeling of design process are considered in this paper, namely, feature concepts, feature evolution, and the semantic consistencies of the states of product models. A semantics-based product model is introduced to facilitate the description of both conceptual and detailed models, and to maintain the semantic consistencies of product states. The process is represented by feature states and their evolution records. Feature type variation and prototype-based design are proposed to support feature evolution. A conceptual description of the design process and an example are given.

A Client/Server Implementation of the Design Process Using PDES/STEP “Level 3” Data Sharing Architecture

1993 ◽  
Author(s):  
Esther A. Edwards-lwe
Keyword(s):  
Data Sharing ◽  
Design Process ◽  
Concurrent Engineering ◽  
Data Exchange ◽  
Product Information ◽  
Global Market ◽  
Lessons Learned ◽  
Product Model ◽  
Product Data ◽  
Level 3

Abstract The ability to exchange and share product data between and within enterprises is essential for implementing the concepts of concurrent engineering as well as operating in a global market economy. STEP, the STandard for the Exchange of Product Model Data, is an international effort to standardize product information. Product information is used by manufacturing enterprise to design, produce, and maintain a product. The purpose of STEP is to prescribe a neutral mechanism capable of completely representing product data throughout the life cycle of a product. Data sharing can only be discussed in the context of a specific application. The scope of STEP data sharing architecture has progressed from a single shared facility to sharing multiple distributed facilities. This paper discusses the lessons learned from a prototype implementation of the mechanical part design process(es) captured in a network of heterogeneous computers and database management systems to allow for data exchange and sharing between and within an enterprise.

Purely Declarative Feature-Based Design With Feature Type Property Maintenance

2004 ◽  
Author(s):  
Dhaval Lokagariwar ◽  
Bernhard Bettig
Keyword(s):  
Design Process ◽  
Research Work ◽  
Building Blocks ◽  
Feature Representation ◽  
Software Systems ◽  
Design Environment ◽  
Design Features ◽  
Planning Algorithm ◽  
Feature Based ◽  
Feature Based Design

Commercial feature-based design systems are based on describing the design model in some form of sequential representation of primitive shapes and operations called features. In these systems, the overall design process, the behavior of building blocks and the characteristics of the final model, are governed by the construction sequence. These systems do not check for the conformity of the final shape with the actual design intent of features, and allow their design and engineering intent to be altered during the design process. The research work presented here describes a new design methodology and feature representation for facilitating a design environment that is independent of any construction order or constraint-based dependencies and provides a mechanism for maintaining design and engineering intent of the design features. The methodology works by dynamically evaluating the features using a planning algorithm such that the validity of each feature is maintained. These are intended to serve as a generic template that can be used to design and develop specific design features and CAD software systems.

Integrated Process Planning Based on 3D Product Models

2009 ◽  
Vol 407-408 ◽  
pp. 298-302 ◽  
Author(s):  
Li Hong Qiao ◽  
Jin Zhang
Keyword(s):  
Process Planning ◽  
Group Technology ◽  
Product Information ◽  
Information Source ◽  
Planning System ◽  
Integrated Process ◽  
Product Model ◽  
Application Systems ◽  
Product Models ◽  
Feature Based

One of the major barriers to the integration of CAD, CAPP and CAM is insufficiency and incompatibility of product model data among various application systems. This paper presented an effective approach to achieve integrated process planning with CAD and CAM under a product data management environment based on 3D product models. The system architecture and the processes of an integrated process planning system (3D-IPP) were constructed using feature information and specific CAD/CAPP/CAM integration technologies based on feature. A feature-based product information model is designed as the information source for the 3D-IPP. A feature-based integrated process planning method was developed based on group technology, intelligent decision-making algorithms and parametric operation templates in numerically controlled (NC) programming. The procedures of intelligent process route planning and parametric NC operation planning were addressed. The 3D-IPP system and its implementation provide an effective solution to strive for complete information sharing among application systems of CAD, CAPP and CAM.

Research and Implementation on Automatical Adjustment Method of Design Feature Model

2012 ◽  
Vol 197 ◽  
pp. 750-754
Author(s):  
Yao Chen ◽  
Guo Yuan Zhang ◽  
Jun Chao Wei ◽  
Xiu Tian Yan ◽  
Miao He
Keyword(s):  
Feature Recognition ◽  
Design Feature ◽  
Feature Modeling ◽  
Feature Model ◽  
Concurrent Design ◽  
Machining Feature ◽  
Feature Based ◽  
Feature Based Design ◽  
Product Realization

Traditional engineering design and realization typically follows a sequential pattern as described by many research publications such as French, Pahl and Beitz. These design methodologies face challenges when time is essence in product realization lifecycle. In contrast, as the design process of a product evolves，this new method incrementally creates machining feature model and realizes concurrent design feature and machining feature modeling based on an algorithm developed for local feature recognition. In addition, the method accelerated the determination of the area that require to be recognized by utilizing a dynamic link list to record the changing information of topological elements, the design features of the model generated by the feature-based design, processing and feature recognition is generated through feature model.

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.

Towards a Specification for a Product Model to Assist the Design of Injection Moulds

2001 ◽  
Author(s):  
Héctor Morano ◽  
Vicente Borja ◽  
Marcelo López ◽  
Álvaro Ayala
Keyword(s):  
Data Model ◽  
Concurrent Design ◽  
Product Model ◽  
New Model ◽  
Model Driven ◽  
Software Applications ◽  
Product Models ◽  
Design And Manufacture ◽  
Data Requirements

Abstract Product models come from the analysis of the data requirements to support the design and manufacture of products. These models are implemented in databases aimed at providing information to software applications that assist the concurrent design of products. This paper presents the requirements of a data model driven software system to aid the design of injection moulds and analyses two product models which were developed in different contexts but capable of representing injection moulded parts and moulds. A case study is used to show the application of each one of the models selected. Finally, some conclusions of the analysis are drawn in order to set the foundation of a new model.

Step Services for Sharing Product Models in a Virtual Enterprise

1998 ◽  
Author(s):  
Martin Hardwick ◽  
David L. Spooner
Keyword(s):  
Virtual Enterprise ◽  
Information Infrastructure ◽  
Lessons Learned ◽  
Product Model ◽  
Product Data ◽  
Distributed Information ◽  
Common Representation ◽  
Product Models ◽  
Future Plans

Abstract This paper focuses on managing product data in a distributed information infrastructure for a virtual enterprise. It exploits the emerging STEP standards as a common representation for exchanging product data within this infrastructure. A set of STEP services is defined that provide the capability for engineers to retrieve and edit parts or a product model and to integrate those edited parts back into the product model. A demonstration of these services as part of a National Industrial Information Infrastructure Protocols Consortium demonstration is then described. The paper ends by discussing lessons learned from this demonstration. It also discusses future plans for development of the STEP services.

NIDDESC-IGES Developments—Today’s Solution

1994 ◽  
Vol 10 (01) ◽  
pp. 31-38
Author(s):  
Burton Gischner ◽  
Gregory Morea
Keyword(s):  
Department Of Defense ◽  
Data Exchange ◽  
Data Transfer ◽  
Digital Data ◽  
Current Version ◽  
Product Model ◽  
Shipbuilding Industry ◽  
Product Models ◽  
Engineering Drawings ◽  
Application Protocols

The Initial Graphics Exchange Specification (IGES) was first developed in 1980. It has evolved with continual improvements to the current Version 5.1 which was published in October 1991 [1]. Although IGES has proved to be a very valuable tool, difficulties have been encountered in using it for sophisticated transfers, such as for product models or complicated drawings. The long range solution to these difficulties is the emergence of the Standard for the Exchange of Product Model Data (STEP). The Navy/Industry Digital Data Exchange Standards Committee (NIDDESC) has been a leading player in the development of this international standard. However, in the interim, NIDDESC is also spearheading the efforts to enhance the use of IGES by developing application protocols. Two of these application protocols, for 3D Piping and Engineering Drawings, are the first ones to be developed by the IGES/ PDES (Product Data Exchange using STEP) Organization (IPO), and will lead the way to more productive data transfer before the development of STEP. They will be referenced by the U.S. Department of Defense (DOD) standard for digital data transfer, MIL-D-28000 [2], and should greatly facilitate the occurrence of effective data transfer in these two disciplines. Furthermore, the use of these IGES application protocols is expected to provide significant guidance in the development of application protocols for the emerging STEP standard. This paper focuses on the development of these two application protocols, the involvement of NIDDESC and the shipbuilding industry (as well as the participation of other industry users and vendors), and the significant benefits to be derived from the adoption of these standards.

Product Data Exchange to Support Modeling and Simulation

2005 ◽  
Vol 21 (03) ◽  
pp. 160-169
Author(s):  
T. Briggs ◽  
B. Gischner ◽  
P. Lazo ◽  
P. Lazo ◽  
A. Royal ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Electrical Heating ◽  
Model Data ◽  
Product Model ◽  
Shipbuilding Industry ◽  
Product Data ◽  
Computer Aided ◽  
Aided Design

Successful and efficient exchange of product model data has been a major challenge in the shipbuilding industry for the past two decades. The Standard for the Exchange of Product Model Data (STEP) has been developed to enable this capability. Four STEP application protocols (APs) to facilitate the exchange of structural and distributed systems models in shipbuilding were completed in 2003 and were adopted by the International Organization for Standardization (ISO) by mid-2004. In August 2003, ISO 10303–216: Ship Moulded Forms (AP216) became the first shipbuilding STEP AP to be published as an international standard. Participants involved in these efforts represent several major US shipyards, the Navy, and their computer-aided design/ engineering (CAD/CAE) vendors. The thrust of shipbuilding data exchange efforts has now shifted from development to implementation. This paper will report on efforts to develop and use translators for this AP to exchange hull form product data in the ship modeling and simulation arena. In addition, process simulation is becoming common in the design of new ships to validate that the design meets the customer's specifications. Current technology requires that the ship be modeled both in the computer-aided design (CAD) environment and then repeated in the simulation workbench. Not only is this effort inefficient, but it is inherently error prone. Through the National Shipbuilding Research Program (NSRP)-sponsored Integrated Shipbuilding Environment (ISE) projects, we have developed tool sets that use AP227: Plant Spatial Configuration to permit the design to flow smoothly from the CAD workbench to the simulation workbench. This paper summarizes the efforts to develop and use a suite of tools that enables US shipyards to become more productive. It details the specific successes in using AP216 and AP227 for modeling and simulation, as well as efforts to exchange design data electronically between CAD systems. The report also outlines efforts that are underway to use other APs to successfully exchange data describing ship electrical; heating, ventilation, and air-conditioning (HVAC); and controls systems.

The Key Technology Research of Heterogeneous Product Data Exchange and Sharing in Collaborative Design and Manufacturing System

2013 ◽  
Vol 694-697 ◽  
pp. 2432-2437 ◽  
Author(s):  
Shu Fen Liu ◽  
Wei Min Li
Keyword(s):  
Collaborative Design ◽  
Data Exchange ◽  
Data Transfer ◽  
Heterogeneous Systems ◽  
Product Model ◽  
Web Based ◽  
Product Data ◽  
Main Research ◽  
Design And Manufacturing ◽  
Main Research Topic

In the paper, the main research topic is product data exchange of each heterogeneous systems in the process of collaborative design and manufacturing under the condition of mass customization.Based on the research for existing technology of product model information sharing and conversion,put forward the solution to combine STEP with XML,completed product data transfer and exchange among web-based cooperation enterprises. Also,it was researched how to express EXPRESS data model to XML, as well as its application in the network environment, the function of converting STEP Part21 physical file to XML file was realized.

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