An intelligent object-oriented feature-based system for CAD/CAM integration

1994 ◽  
Author(s):  
King-wei Wong
Keyword(s):  
Object Oriented ◽  
Cad Cam ◽  
Feature Based

Relations Between Features: Prototyping Object-Oriented Language Extensions on an Industrial Example

1996 ◽  
Author(s):  
Brendan D. Brett ◽  
Thomas J. Peters ◽  
Steven A. Demurjian ◽  
Donald M. Needham
Keyword(s):  
Object Oriented ◽  
Critical Feature ◽  
Cad Cam ◽  
Change Notification ◽  
Feature Based ◽  
Software Object ◽  
Feature Based Design ◽  
Parent Child Relationships ◽  
Cam Software ◽  
Object Oriented Languages

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.

Machining Feature-Based CAD/CAPP for STEP-NC

2014 ◽  
Vol 598 ◽  
pp. 591-594 ◽  
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.

Development of a feature-based and object-oriented concurrent engineering system

1994 ◽  
Vol 5 (1) ◽  
pp. 23-31 ◽  
Author(s):  
C. Chen ◽  
F. Swift ◽  
S. Lee ◽  
R. Ege ◽  
Q. Shen
Keyword(s):  
Concurrent Engineering ◽  
Object Oriented ◽  
Engineering System ◽  
Feature Based

Dynamic Binding of Features and Solid Modelers

1993 ◽  
Author(s):  
Jami J. Shah ◽  
Viren Pherwani
Keyword(s):  
Geometric Modeling ◽  
Object Oriented ◽  
The Other ◽  
Dynamic Binding ◽  
Communication Architecture ◽  
X Window ◽  
Feature Based

Abstract The work described in this paper investigates the feasibility of standardizing communications between geometric modeling core systems and generic feature-based applications. Since geometric modelers differ in the functionality they provide and feature applications vary in the level of geometric operations they can support internally, a multi-layered communication architecture is proposed. The methodology is analogous to the X-Window standard for graphics. At the lowest level is a library of functions named Geo-lib, which are translated into geometric modeler specific commands. If there was to be a future dynamic interfacing standard, such as STEP-SDAI, these specific calls could be replaced by standard calls, analogous to Geo-Protocol. At the next layer is a library, called Geo-widgets, which are written entirely using Geo-lib functions. At the highest level Geo-Tools, functions used commonly by generic applications. Feature applications can choose to use the library at any level, as necessary. This multi-layered geometric toolkit creates a seamless object oriented bond between the feature application and the geometric modeling core, in such a way that either one could be replaced without requiring any changes to the other.

A Knowledge-Based System for Machining Operation Planning in Feature Based, Open-Architecture Manufacturing

1996 ◽  
Author(s):  
James A. Stori ◽  
Paul K. Wright
Keyword(s):  
Machine Tool ◽  
Tool Path ◽  
Integrated Design ◽  
Object Oriented ◽  
Planning System ◽  
Open Architecture ◽  
Operation Planning ◽  
Trade Offs ◽  
Feature Based ◽  
Machining Parameter

Abstract Within the Integrated Design And Manufacturing Environment (IMADE), operation planning provides a mapping from geometric design primitives to machining operation sequences for manufacturing processes. Operation planning includes tool selection, machining parameter selection, and tool path generation. An object oriented approach to program structure is adopted, whereby features, operations and tools, inherit behaviors and attributes from the appropriate class-hierarchies for the part, the manufacturing operations, and tooling classes. A detailed example is presented illustrating the operation planning search algorithm. Scripts are generated by the individual machining operations for execution on a machine tool. Tooling information is maintained in an object-oriented database through the FAR libraries for Common LISP. Examples of particular process plans show that the inherent trade-offs between specified precision and machining time can be investigated. An Open Architecture Machine Tool (MOSAIC-PM) has been used to machine the parts created by the feature based design and planning system. The novel contributions of this paper relate to the demonstration of “seamless” links between, a) design, b) planning, and c) actual fabrication by milling.

The CAD/CAM Interface: A 25-Year Retrospective

2005 ◽  
Vol 5 (3) ◽  
pp. 188-197 ◽  
Author(s):  
J. Corney ◽  
C. Hayes ◽  
V. Sundararajan ◽  
P. Wright
Keyword(s):  
Computer Aided Design ◽  
Future Research ◽  
Manufacturing Processes ◽  
Sheet Metal Parts ◽  
Multiaxis Machining ◽  
Computer Aided ◽  
Cad Cam ◽  
Feature Based ◽  
Manufacturing Applications ◽  
Aided Design

The vision of fully automated manufacturing processes was conceived when computers were first used to control industrial equipment. But realizing this goal has not been easy; the difficulties of generating manufacturing information directly from computer aided design (CAD) data continued to challenge researchers for over 25 years. Although the extraction of coordinate geometry has always been straightforward, identifying the semantic structures (i.e., features) needed for reasoning about a component’s function and manufacturability has proved much more difficult. Consequently the programming of computer controlled manufacturing processes such as milling, cutting, turning and even the various lamination systems (e.g., SLA, SLS) has remained largely computer aided rather than entirely automated. This paper summarizes generic difficulties inherent in the development of feature based CAD/CAM (computer aided manufacturing) interfaces and presents two alternative perspectives on developments in manufacturing integration research that have occurred over the last 25 years. The first perspective presents developments in terms of technology drivers including progress in computational algorithms, enhanced design environments and faster computers. The second perspective describes challenges that arise in specific manufacturing applications including multiaxis machining, laminates, and sheet metal parts. The paper concludes by identifying possible directions for future research in this area.

Sign in / Sign up

Export Citation Format

Share Document