Computer based (CAD/CAM) drill design system

1985 ◽  
Vol 4 (1) ◽  
pp. 105-107 ◽  
Author(s):  
Timothy J. Greene
Keyword(s):  
Design System ◽  
Cad Cam ◽  
Computer Based ◽  
Drill Design

Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package

2018 ◽  
pp. 11-33
Author(s):  
A. N. Bozhko
Keyword(s):  
Computer Aided Design ◽  
State Of The Art ◽  
Graph Model ◽  
Design System ◽  
Assembly Planning ◽  
Complex Products ◽  
Assembly Sequences ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

Computer Representation of Numerical Expertise for Preliminary Ship Design

1989 ◽  
Vol 26 (04) ◽  
pp. 289-302
Author(s):  
A. H. B. Duffy ◽  
K. J. MacCallum
Keyword(s):  
Experimental System ◽  
Ship Design ◽  
Design Model ◽  
Design System ◽  
Early Stages ◽  
Worked Example ◽  
Preliminary Ship Design ◽  
Numerical Design ◽  
Computer Representation ◽  
Computer Based

In the early stages of ship design a considerable amount of experience and knowledge is used to build and evaluate empirical models with known design relationships. However, computer-based systems which aim to assist this stage have tended to concentrate on the analytical aspects of the process and have not been successful in integrating with this expertise and benefitting from it. This paper presents some of the results of a program of research into methods and representing knowledge of empirical numerical relationships used in these early stages of the design process. The work is based on an experimental system, DESIGNER, described in earlier papers. The DESIGNER system is used to carry out a series of evaluations of design sessions, using a warship design model. By examining the progress toward a set of design goals and the classes of interactions used, an improved understanding of the requirements of an interactive numerical design system is developed. As a consequence, methods have been developed to handle approximate values and relationships, to include design margins, and to represent explicitly in the system the definition and use of goals, or design requirements. Using a design model representing a bulk carrier, the paper then presents a worked example to illustrate the use of the new numerical knowledge techniques. It is concluded that the techniques could make a useful contribution to any interactive numerical design system which aims to provide improved use of expertise.

Fabrication of Maxillofacial Implant Using CAD CAM System

2010 ◽  
Vol 146-147 ◽  
pp. 353-356
Author(s):  
Se Kou Singare ◽  
Li Wang ◽  
Shou Yan Zhong ◽  
Guang Hui Xu ◽  
Wei Ping Wang ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
3D Model ◽  
Maxillofacial Surgery ◽  
Bone Defects ◽  
Bony Defect ◽  
Cad Cam ◽  
Computer Based ◽  
3D Acquisition ◽  
Aided Design ◽  
Individual Implant

We present an approach that combines Computer Tomography (CT), reverse engineering (RE) and rapid prototyping (RP) for individual implant production in maxillofacial surgery. 3D acquisition of the patient’s skull is performed, after acquisition of data; an individual computer-based 3D model of the bony defect is generated. These data are transferred into RE software to create the implant using a computer-aided design (CAD) model, which is directed into the RP machine for the production of the physical model. The implant is then directly used in investment casting such as “Quick Cast” pattern to produce the titanium model. In the clinical reports presented here, reconstructions of one patient with mandible bone defects were performed using this method. The custom prostheses perfectly fit the defects during the operations, and surgery time was reduced.

scholarly journals Automatic Face Recognition for Various Expressions and Facial Details

2019 ◽  
Vol 8 (9S3) ◽  
pp. 264-268
Keyword(s):  
Face Recognition ◽  
Design System ◽  
Digital Cameras ◽  
Still Images ◽  
Video Frames ◽  
The People ◽  
Computer Based ◽  
Signal Image ◽  
Recognition Technique

Face Recognition Technique (FRT) was a unique Biometric Technique which tries to spot the people from still images or video frames by using techniques of pattern recognition. Face recognition includes both face identification and face verification (authentication). The FR Design system follows two basic steps i.e. Feature extraction and classification of patterns. Automated FR finds many applications in real time environment ranging from Social Media, surveillance to biometric authentications. Many state-of-the-art face recognition techniques had been implemented, but the Automated Face Recognition (AFR) taken by digital cameras in unconstraint real‐world environment continues to be terribly difficult, since it involves vital variations in each acquisition conditions, yet as in facial expressions and in pose variations. Thus, this paper presents the theme of computer based automatic face recognition in lightweight of the most contests therein areas with developed solutions that supports applications of signal, image processing and computing strategies.

scholarly journals Formalization of Low-frequency Rectangular Electrical Connectors Design Method

2019 ◽  
Author(s):  
Владимир Аверченков ◽  
Vladimir Averchenkov ◽  
Алексей Вилюха ◽  
Alexey Viluykha ◽  
Михаил Рытов ◽  
...  
Keyword(s):  
Design Process ◽  
Design Method ◽  
Low Frequency ◽  
Empirical Method ◽  
Design System ◽  
Development Trends ◽  
Technological Preparation ◽  
Cad Cam ◽  
The Moment ◽  
Electrical Connectors

The article deals with the design process of low-frequency rectangular electrical connectors and determining the position CAD/CAE-systems in it. The review of the actual literature shows that development trends of design and technological preparation of low-frequency rectangular electrical connectors production mean using CAD/CAM/CAE-systems. But at the moment these systems are used for solving partial issues. The authors formalize the empirical method of the design and systemize the factors, which influence the design process. As a result of the mentioned above actions, the working algorithm of the multipurpose CAD/CAE electrical connectors design system was obtained. The results of the research were applied to automize the design process of connectors housings.

scholarly journals An Intelligent/Learning Axial Fan Design System

1991 ◽  
Author(s):  
Dennis G. Jackson ◽  
Terry Wright
Keyword(s):  
Design Process ◽  
Design Parameters ◽  
Design System ◽  
Preliminary Design ◽  
Axial Fan ◽  
Design Program ◽  
Current Design ◽  
Computer Based ◽  
Refinement Process ◽  
Blade Element

A computer-based axial fan design system has been developed that allows the designer to rapidly obtain a preliminary axial fan design. Program FANDES allows the designer two options to determine the preliminary design parameters for a single-stage axial fan. The first option allows the designer the ability to design an axial fan using conventional blade-element design techniques. The second option enables the designer to search a database of previously designed fans for a set of scaled fans that will satisfy the current design point requirements. The designer can then refine one of the fans in this set to possibly improve the selected fan’s performance. The database of fans is utilized and maintained by FANDES and new fans are added at the user’s request. This allows for an intelligent program that is constantly learning from previous designs. As more fans are designed and saved to the database the design process becomes more of a selection and refinement process of previously designed fans.

Merging CAD with IT

1998 ◽  
Vol 120 (07) ◽  
pp. 56-58 ◽  
Author(s):  
Laura Carrabine
Keyword(s):  
Computer Aided Design ◽  
Material Handling ◽  
Design System ◽  
Product Modeling ◽  
It Infrastructure ◽  
Robotic Welding ◽  
Windows Nt ◽  
Newport News ◽  
Cad Cam ◽  
Work Cells

This article highlights the various processes involved in shipbuilding such as design, production planning, material sourcing, and outfitting. Since the program’s inception, Newport News Shipbuilding (NNS), has leveraged its computer-aided- design, -manufacturing, and –engineering (CAD/CAM/CAE) system and IT infrastructure to successfully revitalize its engineering environment and remain profitable in a rapidly changing marketplace. NNS engineers perform all of their ship product modeling using a proprietary program called VIVID, a design system that enables users to concurrently design structures in a multidisciplinary environment. As part of the continuing effort to develop its IT infrastructure and automate production processes, NNS has invested $60 million in upgrading its engineering design systems and automating manufacturing facilities with advanced material-handling systems, robotic cutting work cells, and robotic welding work cells. NNS is also transitioning its product-modeling systems from a Unix workstation environment to Windows NT platforms based on Microsoft’s ActiveX and COM technologies.

High Technology in Shipbuilding

1987 ◽  
Vol 201 (2) ◽  
pp. 59-72 ◽  
Author(s):  
P A Milne
Keyword(s):  
Computer Program ◽  
High Technology ◽  
Industrial Robots ◽  
Shipbuilding Industry ◽  
Delivery Times ◽  
Cad Cam ◽  
Computer Based ◽  
Reduced Costs ◽  
Engine Construction

Following a review of market developments and their dramatic effects on shipbuilders, the paper makes a case for a continuing shipbuilding industry in Europe, and reviews the investment in high technology equipment in merchant shipyards. The introduction of computer-based systems in the industry and the extensive use of CAD/CAM in shipyards are described. The use and potential of industrial robots and lasers are covered. Advances in engine construction and ship production resulting in shorter delivery times and reduced costs are illustrated. Engine selection by computer program is described and the paper concludes with a view on future changes in merchant shipbuilding.

Symbolic computing in engineering design

1989 ◽  
Vol 3 (3) ◽  
pp. 195-206
Author(s):  
Terry Cline ◽  
Harold Abelson ◽  
Warren Harris
Keyword(s):  
Engineering Design ◽  
Control Systems ◽  
Computer Aided Design ◽  
Design System ◽  
Specific Knowledge ◽  
Symbolic Computing ◽  
Computational Support ◽  
Engineering Models ◽  
Computer Based ◽  
Aided Design

Computer programs that combine traditional numeric methods with symbolic algebra and with specific knowledge of application-based techniques can provide new levels of computational support for engineering design. We illustrate this with a computer-based ‘control engineer’s assistant’. Although this program is focussed on control system design, it demonstrates techniques that should be widely applicable across many engineering disciplines. In particular, we show how, with symbolic computing, a computer-aided design system can usefully simulate engineering models early in the design process, before all (or any) system parameters have been specified numerically. Our system employs a flexible, extensible, object-oriented representation for control systems, which admits multiple mathematical models of designs and provides a framework for integrating tools that operate on diverse representations.

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