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AUTOMATIC GENERATION OF 3D MACHINING SURFACES WITH TOOL COMPENSATION FROM GRAYLEVEL IMAGE models

IFAC Proceedings Volumes 2007年第3期40卷 30-35页

作者： Theodor Borangiu Anamaria Dogar Alexandru Dumitrache University Politehnica of Bucharest Dept. of Automation and Applied Informatics

The paper presents a theoretical approach and implementing issue for automatic CNC toolpath generation using morphological image processing operators applied to depth map images. This method allows computing cutter compensation for various end mill shapes. Roughing is made using zigzag cuts with a flat end mill, and finishing is done with isoparametric toolpaths using various rounded end mills. An AI-based algorithm and image processing software create CNC machining instructions from depth map image models. The paper also describes a graphical user interface and includes experimental results.

关键词： image processing computer aided design cad/cam models CNC machining

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Interaction with the Relational Structures of Computer Aided Design models

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IFAC Proceedings Volumes 1997年第14期30卷 345-350页

作者： Franco Folini Isabella Bozza Dipartimento di Ingegneria Industriale Università degli Studi di Parma Parma Italy

The current evolution of the software systems supporting the mechanical design processes is gradually extending the “traditional” cad systems domain to integrate cam, CAE and PDM modules. Consequently, the cad model is changing its geometry-oriented nature, integrating information and data coming from the whole design and production processes. A growing network of relations characterizes this new cad model. At present, some relations are represented explicitly in the integrated cad model while others are completely implicit; for some types of relations, cad systems offer only a limited set of operation; finally, the relations are usually presented to the user though heterogeneous interaction modalities. This paper proposes a classification of the typical cad relations and suggests a basic set of operations on them; finally, it discusses the emerging interaction modalities and delineates their possible application in the cad field.

关键词： cad/cam models constraints relational databases design systems

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Functional Assembly Design Process Support with Assembly Features Operations

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IFAC Proceedings Volumes 2003年第23期36卷 137-142页

作者： D. Deneux W. Shi LAMIH - UMR CNRS n°8530 - University of Valenciennes 59313 Valenciennes cedex 9 France University of Chongqing State Key Lab of Mechanical Engineering 400044 Chongqing PR China

In this paper, a general assembly model is proposed to support the evolving process characterizing the elaboration of assemblies' product structure. The concept of extended assembly feature is proposed as a functional carrier, consisting of a generic relation among the assembly-modeling entities. The assembly feature model describes the link between product functions and form features of parts. On the basis of this link. the propagation of design modifications preserving the functionality and the coherence of assembly model is demonstrated.

关键词： cad/cam models assembly top-down methods

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A Neutral Data Model for Mechatronic Systems - A Scientific Challenge

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IFAC Proceedings Volumes 2000年第26期33卷 753-761页

作者： Christian Scholz Werner Schiehlen Marcus Krastel Reiner Anderl Institute B of Mechanics University of Stuttgart Pfaffenwaldring 9 D-70550 Stuttgart Germany phone: (+49) 711 685 6388 fax: (+49) 711 685 6400 www: http://www.uni-stuttgart.de/mechb/home.html Department of Computer Integrated Design Darmstadt University of Technology Petersenstr. 30 D-64287 Darmstadt Germany phone: (+49) 6151 16 6000 fax: (+49) 6151 16 6854 www: http://www.dik.maschinenbau.tu-darmstadt.de

The design of new mechatronic products include a dynamic analysis of the accompanying virtual prototypes requiring a completely computerized representation of the product. All necessary design steps and simulations as well as development and manufacturing processes have to be represented digitally. An efficient product data management includes safe storage, maintainance and supply of product-related data. Therefore the project MechaSTEP - STEP data model for simulation data of mechatronic systems was launched, the initial results of which are presented. A companion paper shows the industrial perspective of these results.

关键词： cad/cam models Computer-Aided Engineering Data models Dynamic systems Mechanical engineering Mechanical systems Simulation

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A Prospective Scenario for Integrated cad & CAPP

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IFAC Proceedings Volumes 1995年第24期28卷 127-132页

作者： Dominique Deneux Roland Maranzana LAMIH - University of Valenciennes - BP 311 - 59304 Valenciennes Cedex - France Phone: (33) 2714 13 55 - Fax: (33) 27 14 12 88 ETS-GPA - 4750 Avenue Henri Julien - H2T2C8 Montréal - Québec - Canada Phone: (514) 289 7570 - Fax: (514) 289 9042

The aim of this paper is to introduce an intelligent manufacturing oriented design system kernel, intended to be customised for several design applications, which has been called the Meta Model for cad (Computer Aided design) and CAPP (Computer Aided Process Planning). In a first section, the set of problems and experimented solutions of two aspects of the integrated design and manufacturing planning process are shortly described. In a second section, the models and functions of the meta model are introduced and detained. In a third section, the manufacturing planning aspects is addressed.

关键词： cad/cam models Manufacturing processes Algorithms Knowledge based systems Integration

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A New Parallel Partitioning and Placement Algorithm for ULSI

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IFAC Proceedings Volumes 1998年第20期31卷 915-921页

作者： I. Antoniou V. Borovinsky A. Butov V. Mikhov A. Podobaev A. Tikhonov International Solvay Institutes for Physics and Chemistry UIB Campus Plaine CP 231 Boulevard du triomphe 1050 Brussels Belgium Institute of Operating Systems MIET Moscow 103498 Russia

A new approach for parallel partitioning and placement of standard cells for ULSI has been proposed. It is based on the well-known min-cut algorithm and uses a partitioning strategy which is oriented to minimise the number of nets crossing the cutting lines with even cell distribution over the chip area. It was implemented as a cad software tool "SOCRAT", based on SUN SPARCstation and PARSYTEC powerXplorer. The results of developed tool evaluation based on the MCNC International standard benchmarks proved that SOCRAT's runtime for VLSI is up to 4-8 times faster than cadENCE's one using a simulated annealing algorithm, and for high complexity ULSI it is expected to be much faster.

关键词： cad/cam models Computer aided circuit design VLSI Design Integrated circuit Parallel computers Parallel computation Parallel programs

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A System for Three-Dimensional Layout Planning of Automated and Manual Assembly Systems

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IFAC Proceedings Volumes 1998年第7期31卷 29-34页

作者： Gunther Reinhart Ulrich Rossgoderer Institute for Machine Tools and Industrial Engineering (iwb) Technische Universitaet Muenchen D-85747 Garching Germany

The system described in the following article, simplifies the task of spatial planning of assembly stations. On the one hand this is done through automation of iterative planning tasks. On the other hand virtual reality devices are used in cases where it is more efficient to include the planner's intuition. Applications of this planning method will be shown. One application shows the spatial planning of an automated assembly work station, the other deals with a manual workstation. Furthermore the virtual reality equipment at the iwb will be described briefly.

关键词： Manufacturing processes Manufacturing systems Robot programming Ergonomics Optimisation Virtual reality Modelling cad/cam models

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A New Web/Matlab Based System in Control Education

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IFAC Proceedings Volumes 1999年第2期32卷 6410-6415页

作者： Charaf Hassan Róbert Tuschák István Vajk Ruth Bars Jenö Hetthéssy Ferenc Kovács György Szitnyai Department of Automation Technical University of Budapest H-1111 Budapest Goldmann György tér 3 Hungary. Fax: 361-463-2871 phone: 361-463-2870

At the Department of Automation, Technical University of Budapest in the last years the basic course of control theory has been renewed significantly using cad devices, especially Matlab in the computer classroom. In this way the theoretical knowledge became more understandable and convincing for the students. Recently the Internet culture has burst into our everyday life, providing new possibilities for control education, too. It was a challenge lo combine the facilities provided both by the Web and Matlab. In the background of the system the Matlab program package supports the teaching process executing the computations. A new control curriculum using these facilities has been being developed.

关键词： cad/cam models control education integration reachability teaching user interfaces

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DIGITAL TRACEABILITY FROM DESIGN TO MANUFACTURING IN EXTENDED ENTERPRISES.

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IFAC Proceedings Volumes 2006年第3期39卷 529-534页

作者： Julio Garrido campos Luis Rodríguez Míguez Departamento de Ingeniería de Sistemas y Automática. Universidad de Vigo España

This paper proposes an information model for traceability data management in complex industrial environments such us extended enterprises. The objective of the model is to assure that traceability data will be understandable and available whenever required, no matter the product or the manufacturing complexity. The main feature of the model is the definition of an explicit link between the traceability data and the product structure. This provides data significance and drives the data transfer process through industrial partners along the supply chain.

关键词： Automation cad/cam models Data models Manufacturing systems Product quality Quality Control

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STEP MODEL FOR AUTOMATION OF PROCESS MONITORING IN STEP-NC CLOSE-LOOP MANUFACTURING.

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IFAC Proceedings Volumes 2007年第3期40卷 210-215页

作者： Julio Garrido campos Ricardo Marín Martín Juan Sáez López José Ignacio Armesto Departamento de Ingeniería de Sistemas y Automática. Universidad de Vigo España.

This paper proposes a STEP-compliant extension of the AP-238 information model to support CNC manufacturing monitoring capabilities. New nc_functions for AP-238 are proposed to provide online machining information and support the development of AP-238 close loop manufacturing, involving AP-238 cam systems and AP-238 NC interpreters. As a sample case, the paper focuses on the sequential supervision of machining operation time with STEP-NC functions, before addressing other manufacturing variables and more advanced close-loop machining strategies.

关键词： Automation cad/cam models Data models Monitoring Close Loop Manufacturing Quality Control

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