A Structural Framework for Part Feature Recognition: A Link between Computer‐aided Design and Process Planning

1992 ◽  
Vol 3 (1) ◽  
pp. 4-12 ◽  
Author(s):  
Nanua Singh ◽  
Dengzhou Qi
Keyword(s):  
Process Planning ◽  
Computer Aided Design ◽  
Feature Recognition ◽  
Structural Framework ◽  
Computer Aided ◽  
Aided Design ◽  
Part Feature

An oriented feature extraction and recognition approach for concave-convex mixed interacting features in cast-then-machined parts

2018 ◽  
Vol 233 (4) ◽  
pp. 1269-1288 ◽  
Author(s):  
Haichao Wang ◽  
Jie Zhang ◽  
Xiaolong Zhang ◽  
Changwei Ren ◽  
Xiaoxi Wang ◽  
...  
Keyword(s):  
Feature Extraction ◽  
Computer Aided Design ◽  
Feature Recognition ◽  
Freeform Surface ◽  
Layer By Layer ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Machined Parts ◽  
Aided Design ◽  
Interacting Features

Feature recognition is an important technology of computer-aided design/computer-aided engineering/computer-aided process planning/computer-aided manufacturing integration in cast-then-machined part manufacturing. Graph-based approach is one of the most popular feature recognition methods; however, it cannot still solve concave-convex mixed interacting feature recognition problem, which is a common problem in feature recognition of cast-then-machined parts. In this study, an oriented feature extraction and recognition approach is proposed for concave-convex mixed interacting features. The method first extracts predefined features directionally according to the rules generated from attributed adjacency graphs–based feature library and peels off them from part model layer by layer. Sub-features in an interacting feature are associated via hints and organized as a feature tree. The time cost is reduced to less than [Formula: see text] by eliminating subgraph isomorphism and matching operations. Oriented feature extraction and recognition approach recognizes non-freeform-surface features directionally regardless of the part structure. Hence, its application scope can be extended to multiple kinds of non-freeform-surface parts by customizing. Based on our findings, implementations on prismatic, plate, fork, axlebox, linkage, and cast-then-machined parts prove that the proposed approach is applicable on non-freeform-surface parts and effectively recognize concave-convex mixed interacting feature in various mechanical parts.

Common Product/Process Models for Integrating Manufacturing Simulation, Process Planning and Computer Aided Design

1996 ◽  
Author(s):  
Robert V. E. Bryant ◽  
Thomas J. Laliberty
Keyword(s):  
Process Planning ◽  
Collaborative Design ◽  
Computer Aided Design ◽  
Automatic Generation ◽  
Process Models ◽  
Virtual Enterprises ◽  
Computer Aided Process Planning ◽  
Manufacturing Simulation ◽  
Computer Aided ◽  
Aided Design

Abstract Integrated Product Process Development tools which minimize downstream manufacturing risk at the earliest design stages and avoid costly Design-Build-Test cycles are essential to achieving product profitability and meeting market windows. This paper summarizes initial work performed towards the development of the Manufacturing Simulation Driver (MSD) system which will demonstrate the automatic generation and execution of distributed manufacturing simulations. These simulation models are produced by Computer Aided Process Planning (CAPP) software tools which reason about Computer Aided Design (CAD) product models and produce manufacturing “scripts” from a process and resource model of a manufacturing facility. This capability will enable emerging virtual enterprises conducting collaborative design and manufacturing to simulate and prove out the manufacturing cycle of a product prior to launching production ramp-up. 1

Microstructure Feature Recognition for Materials Using Surfacelet-Based Methods for Computer-Aided Design-Material Integration

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Namin Jeong ◽  
David W. Rosen
Keyword(s):  
Computer Aided Design ◽  
Feature Recognition ◽  
Computational Method ◽  
Geometric Features ◽  
Material Microstructure ◽  
Control Material ◽  
Computer Aided ◽  
Aided Design ◽  
And Control ◽  
Material Information

With the material processing freedoms of additive manufacturing (AM), the ability to characterize and control material microstructures is essential if part designers are to properly design parts. To integrate material information into Computer-aided design (CAD) systems, geometric features of material microstructure must be recognized and represented, which is the focus of this paper. Linear microstructure features, such as fibers or grain boundaries, can be found computationally from microstructure images using surfacelet based methods, which include the Radon or Radon-like transform followed by a wavelet transform. By finding peaks in the transform results, linear features can be recognized and characterized by length, orientation, and position. The challenge is that often a feature will be imprecisely represented in the transformed parameter space. In this paper, we demonstrate surfacelet-based methods to recognize microstructure features in parts fabricated by AM. We will provide an explicit computational method to recognize and to quantify linear geometric features from an image.

scholarly journals Computer-Aided Design of Traditional Jigs and Fixtures

2021 ◽  
Vol 12 (1) ◽  
pp. 3
Author(s):  
Abdullah D. Ibrahim ◽  
Hussein M. A. Hussein ◽  
Ibrahim Ahmed ◽  
Emad Abouel Nasr ◽  
Ali Kamrani ◽  
...  
Keyword(s):  
Programming Language ◽  
Computer Aided Design ◽  
Feature Recognition ◽  
Visual Basic ◽  
Modern Technology ◽  
Heuristic Rules ◽  
Computer Aided ◽  
Jigs And Fixtures ◽  
Cylindrical Parts ◽  
Aided Design

Conventional design of jigs and fixtures has become unsuitable given the requirements of modern technology and complexity and diversity in the production with the rapid update of products. Computer-aided design (CAD) of jigs and fixtures is an effective solution in this direction. The current paper focuses on a computer-aided design of the traditional jigs and fixtures and developed a system containing tailor-made software, created using the Visual Basic programming language and installed on it the viewer screen to show the part. The developed system has been built by connecting Visual Basic programming language to the SolidWorks software on which the part is drawn and saved as STEP AP-203 file format, and the system reads and extracts the data from the STEP AP-203 file. Heuristic rules of feature recognition are pre-prepared for checking the extracted geometric data and deciding which data shape will represent the machining feature; then, the system provides the optimum design of the traditional jigs and fixtures for a group of hollow cylindrical parts that contain a group of cross-holes on the cylinder body, whether perpendicular or offset from the cylinder’s axis, (inclined or inclined offset, or blind or through, by applying pre-prepared heuristic rules for the design of traditional jigs and fixtures.

A Framework for Integrated Computer-Aided Design, Process Planning and Manufacturing Systems Engineering for Powertrain Machining

2004 ◽  
Author(s):  
Derek Yip-Hoi ◽  
Jianming Li ◽  
Liang Zhou ◽  
Wencai Wang ◽  
Madhumati Ramesh ◽  
...  
Keyword(s):  
Design Process ◽  
Process Planning ◽  
Systems Engineering ◽  
Computer Aided Design ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Value Added ◽  
Computer Aided Process Planning ◽  
Computer Aided ◽  
Aided Design

Machined powertrain components are a subset of machined parts that introduce unique and difficult problems to product design, process planning and manufacturing system design for the automotive industry. They are complex, high value-added components that must be produced at large volumes to stringent quality standards. Accordingly product development cycles are typically long. Integrated computer-aided approaches are thus desirable for reducing this time and helping manufacturing engineers design the best process and specify the optimal manufacturing system configuration. This paper presents a framework for integrating Computer-Aided Design (CAD), Computer-Aided Process Planning (CAPP) and Computer-Aided Manufacturing Systems Engineering (CAE-MS) for producing machined powertrain components. It describes the key components of this framework and in some cases details of the methods and technologies adopted for their realization. This solution is based upon a feature-centric philosophy. This stands in contrast to the product-variant approach that has been common practice in this industry.

Feature modeling using a grammar representation approach

2005 ◽  
Vol 19 (4) ◽  
pp. 245-259 ◽  
Author(s):  
E. OSTROSI ◽  
M. FERNEY
Keyword(s):  
Computer Aided Design ◽  
Feature Recognition ◽  
Logical Structure ◽  
Feature Modeling ◽  
Second Phase ◽  
Third Phase ◽  
Computer Aided ◽  
Feature Based ◽  
Aided Design ◽  
Intelligent Computer

In intelligent computer-aided design the concept of intelligence is related to that of integration. Using feature-based computer-aided design models is thought to make a complete integration. This paper presents a feature recognition approach based on the use of a feature grammar. Given the complexity of feature recognition in interactions, the basic idea of the approach is to find the latent and logical structure of features in interaction. The approach includes five main phases. The first phase, called regioning, identifies the potential zones for the birth of features. The second phase, called virtual extension, builds links and virtual faces. The third phase, called structuring, transforms the region into a structure compatible with the structure of the features represented by the feature grammar. The fourth phase, called Identification, identifies the features in these zones. The fifth phase, called modeling, represents the model by features. The feature modeling system software is developed based on this approach.

A Flexible, Interactive Integration Architecture for Extraction of CAPP Information From CAD

1995 ◽  
Author(s):  
C. C. Hayes
Keyword(s):  
Process Planning ◽  
Information Exchange ◽  
Computer Aided Design ◽  
Control Structures ◽  
Computer Aided Process Planning ◽  
Integration Architecture ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design ◽  
And Control

Abstract This paper describes CHAMP, a conceptual architecture designed to support the task of passing information from computer-aided design systems to computer-aided process planning systems.1 Current integration systems are lacking in the flexibility of both their information-exchange mechanisms and in their control structures. The result is a sacrifice in the efficiency of solutions produced. The proposed architecture is based on models of human process planning, and aims to improve the effectiveness of CAD/CAPP integration by providing more flexible communications and control structures through shared blackboards, and by providing a mechanism for reasoning about intermediate solution states. The architecture is intended to summarize the current understanding of the CAD/CAPP integration task and to elucidate areas where further research is required.

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