Implementing manufacturing feature based design in CAD/CAM

Abstract Feature-based design techniques are being broadly incorporated into supporting CAD/CAM software. Object-oriented methodologies effectively capture parent-child relationships between features. However, realistic design, manufacturing and assembly domains often require more subtle inter-relationships between features, where contemporary object-oriented languages lack capabilities to facilitate such modeling. This research focuses upon prototyping object-oriented techniques to express non-ancestral relationships between features. This research was undertaken to support an industrial design team and our research goals were to: • determine critical feature inter-relationships, • prototype object-oriented software mechanisms for expressing these non-ancestral inter-relationships, and • equip those mechanisms with methods for change notification.

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Feature Extraction Techniques by Optimal Volume Decomposition

Volume 6: 16th Computers in Engineering Conference ◽

10.1115/96-detc/cie-1337 ◽

1996 ◽

Author(s):

Jian Dong ◽

Sreedharan Vijayan

Keyword(s):

Feature Extraction ◽

Process Planning ◽

Feature Recognition ◽

Optimization Methods ◽

Manufacturing Cost ◽

Extraction Techniques ◽

Manufacturing Planning ◽

Cad Cam ◽

Feature Based ◽

Manufacturing Feature

Abstract The elements of Computer-Aided Manufacturing, do not make full use of the part description stored in a CAD model because it exists in terms of low-level faces, edges and vertices or primitive volumes related to the manufacturing planning task. Consequently manufacturing planning still depends upon human expertise and input to interpret the part definition according to manufacturing needs. Feature-based technology is becoming an important tool to resolve this and other related problems. One approach is to design the part using Features directly. Another approach is Manufacturing Feature Extraction and Recognition. Manufacturing Feature Extraction consists of searching for the part description, recognizing cavity features, extracting those features as solid volumes of material to be removed. Feature Recognition involves raising this information to the level of part features which can be read by a process planning program. The feature extraction can be called optimal if the manufacturing cost of the component using those features can be minimized. An optimized feature extraction technique using two powerful optimization methods viz., Simulated Annealing and Genetic Algorithm is presented in this paper. This work has relevance in the areas of CAD/CAM linking, process planning and manufacturability assessment.

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A Framework for Feature Based Part Modeling

ASME 1991 Computers in Engineering Conference: Volume 1 — Artificial Intelligence; Expert Systems; CAD/CAM/CAE; Computational Fluid/Thermal Engineering ◽

10.1115/cie1991-0045 ◽

1991 ◽

Author(s):

Yuh-Min Chen ◽

R. Allen Miller ◽

K. Rao Vemuri

Keyword(s):

Geometric Reasoning ◽

Geometric Information ◽

Cad System ◽

Knowledge Based ◽

Modeling Environment ◽

Cad Cam ◽

Feature Based ◽

High Level ◽

Feature Based Design ◽

Part Modeling

Abstract To increase the capabilities and intelligence of CAD/CAM systems, a feature based modeling environment, integrated with a knowledge based environment, is under development utilizing a commercial CAD system. This environment allows designers to model parts with features, and provides high-level part models to support geometric reasoning in manufacturing assessment and related functions. Two fundamental issues have been considered: (1) What kind of information is required to specify a part and to support reasoning about the part in a wide variety of applications?, and (2) How can the results serve the geometric reasoning needs of the various engineering applications which need geometric information about the part? This paper will discuss the information required for defining net shaped parts (parts to be manufactured by net shape processes), a framework for a feature based modeling environment, the procedures for feature based design, and the construction of high-level (semantic) pan models suitable for geometric reasoning in a knowledge based environment.

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The Technology of Components in Feature-Based Design and Process Planning

Volume 2: 19th Computers and Information in Engineering Conference ◽

10.1115/detc99/cie-9100 ◽

1999 ◽

Author(s):

Xiaodong Liu ◽

Richard A. Wysk

Keyword(s):

Software Development ◽

Process Planning ◽

Component Technology ◽

Development Mode ◽

Component Framework ◽

The Future ◽

Development Technology ◽

Cad Cam ◽

Feature Based ◽

Feature Based Design

Abstract In current feature-based design and process planning research, two major problems are application system development mode and product information description. Particularly, with our current development mode, programs from other researchers cannot be reused, each researcher has to redevelop a set of new feature-application code almost built-from-scratch to create features and/or produce process planning.... As a result, though we have developed countless features-application programs, the problem about integrating CAD and CAM application is still largely unsolved. From the viewpoint of the technology of components (that is a new, powerful software development technology), we seem to be wasting large amount of time to do a repetitive and ineffective work that is orders of magnitude greater than we should do. By solving several key obstacles that obstruct us from developing the small, reusable components in advanced CAD/CAM fields, the paper creatively introduces into advanced CAD/ CAM fields the brand new, powerful component technology that has never been explored in the fields. And the paper gives a concrete example (MFIC) in the machinable feature application fields to demonstrate how to apply the technology in a specific field. The framework in the paper is the first component framework for advanced CAD/CAM applications. Because the technology of components provides developers with more reusability, extensibility, reliability and compatibility, so it has been universally accepted as the future software development technology by the entire software world. We believe the component technology is the future software development technology in advanced CAD/CAM fields too, and the component framework will change the development mode of advanced CAD/CAM applications, just like the interchangeability completely changes the manufacturing mode in mechanical industry.

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Machining Feature-Based CAD/CAPP for STEP-NC

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.598.591 ◽

2014 ◽

Vol 598 ◽

pp. 591-594 ◽

Cited By ~ 2

Author(s):

Li Yan Zhang

Keyword(s):

Process Planning ◽

Manufacturing Process ◽

Data Transfer ◽

Operation Planning ◽

Computer Aided Process Planning ◽

Machining Feature ◽

Computer Aided ◽

Cad Cam ◽

Feature Based ◽

Cam Systems

ISO 14649, known as STEP-NC, is new model of data transfer between CAD/CAM systems and CNC machines. In this paper, the modeling based on machining feature is proposed. The machining feature comes from the manufacturing process considering the restriction of machining technology and machining resource. Then the framework for computer aided process planning is presented, where the algorithms of operation planning is studied. The practical example has been provided and results indicate that machining feature based model can integrate with CAPP and STEP-NC seamlessly.

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