Geometric Tolerancing of Products E-Book

• Herausgeber: John Wiley & Sons
• Kategorie: Fachliteratur
• Sprache: Englisch

Seitenzahl: 398

Veröffentlichungsjahr: 2013

Beschreibung

This title describes the various research results in the field of geometric tolerancing of products, an activity that highlights the difficult scientific locks. The collection is of great importance for further innovation in the development of industrial products.

Leseprobe

Table of Contents

PART I. GEOMETRIC TOLERANCING ISSUES

Chapter 1. Current and Future Issues in Tolerancing: the GD&T French Research Group (TRG) Contribution

1.1. Introduction

1.2. Presentation of the Tolerancing Resarch Group: objectives and function

1.3. Synthesis of the approach and contributions of the group

1.4. Research perspectives

1.5. Media examples: “centering” and “connecting rod-crank”

1.6. Conclusion

1.7. Bibliography

PART II. GEOMETRIC TOLERANCING LANGUAGES

Chapter 2. Language of Tolerancing: GeoSpelling

2.1. Introduction

2.2. Concept of the GeoSpelling language

2.3. Geometric features

2.4. Characteristic

2.5. Operations

2.6. Conditions

2.7. Specifications on assemblies – quantifiers

2.8. Applications to part specification

2.9. Applications to product specifications

2.10. Conclusion

2.11. Bibliography

Chapter 3. Product Model for Tolerancing

3.1. Introduction

3.2. Objectives and stakes

3.3. Proposal for a product model

3.4. Benefits of the IPPOP product model

3.5. Application on the centering device

3.6. Conclusion

3.7. Bibliography

Chapter 4. Representation of Mechanical Assemblies and Specifications by Graphs

4.1. Introduction

4.2. Components and joints

4.3. The requirements, technical conditions and specifications

4.4. Manufacturing set-ups

4.5. Displacements between situation features and associated loops

4.6. The key elements

4.7. Conclusion

4.8. Bibliography

Chapter 5. Correspondence between Data Handled by the Graphs and Data Product

5.1. Introduction

5.2. Correspondence between tolerancing graphs and the product data

5.3. Correspondence between manufacturing set-ups and the data product

5.4. Conclusion

PART III. 3D TOLERANCE STACK-UP

Chapter 6. Writing the 3D Chain of Dimensions (Tolerance Stack-Up) in Symbolic Expressions

6.1. Introduction

6.2. A reminder of the establishment of the unidirectional chain of dimensions by the Δl method

6.3. Establishment in writing of a chain of dimensions in 3D by the method of indeterminates in the case of a rigid body

6.4. Consideration of the contact between parts in the mechanisms

6.5. Mechanisms composed of flexible parts, joints without gap (or imposed contact) and imposed effort

6.6. Conclusion

6.7. Bibliography

Chapter 7. Tolerance Analysis and Synthesis, Method of Domains

7.1. Introduction

7.2. Deviation torsor and joint torsor

7.3. Equations of loops

7.4. Deviation and clearance domains

7.5. Representation and properties of the domains

7.6. Application to the analysis of simple chains

7.7. Case of assemblies with parallel joints

7.8. Taking elastic displacements into account

7.9. Conclusion

7.10. Bibliography

Chapter 8. Parametric Specification of Mechanisms

8.1. Introduction

8.2. Problem of the parametric specification of complete and consistent dimensioning

8.3. Generation of parametric tolerancing by the differential variation of the specification of dimensioning

8.4. Problem of the specification transfer

8.5. Expression of parametric tolerancing

8.6. Case study

8.7. Conclusion

8.8. Bibliography

PART IV. METHODS AND TOOLS

Chapter 9. CLIC: A Method for Geometrical Specification of Products

9.1. Introduction

9.2. Input of a tolerancing problem

9.3. Part positioning

9.4. Tolerancing of positioning surfaces

9.5. Generation of functional requirements

9.6. Specification synthesis

9.7. Tolerance chain result

9.8. Tolerance synthesis

9.9. Conclusion

9.10. Bibliography

Chapter 10. MECAmaster: a Tool for Assembly Simulation from Early Design, Industrial Approach

10.1. Introduction

10.2. General principle, 3D tolerance calculation

10.3. Application to assembly calculation

10.4. From model to parts tolerancing

10.5. Statistical tolerancing

10.6. Industrial examples

10.7. Conclusion

10.8. Bibliography

PART V. MANUFACTURING TOLERANCING

Chapter 11. Geometric Manufacturing Simulation

11.1. Introduction

11.2. Modeling of manufacturing set-up

11.3. Approaches to geometric manufacturing simulation

11.4. Conclusion

11.5. Bibliography

Chapter 12. 3D Analysis and Synthesis of Manufacturing Tolerances

12.1. Introduction

12.2. Manufacturing transfer, analysis and synthesis in 1D

12.3. 3D manufacturing simulation model (MMP)

12.4. From the manufacturing process to the MMP

12.5. 3D analysis of the functional tolerances

12.6. 3D synthesis of manufacturing tolerances

12.7. Conclusion

12.8. Bibliography

PART VI. UNCERTAINTIES AND METROLOGY

Chapter 13. Uncertainties in Tolerance Analysis and Specification Checking

13.1. Introduction

13.2. Proposal for a statistical model of real surfaces

13.3. Applications in metrology

13.4. Application to tolerance analysis

13.5. Conclusion

13.6. Bibliography

List of Authors

Index

First published 2010 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc. Adapted and updated from Tolérancement géométrique des produits published 2007 in France by Hermes Science/Lavoisier © LAVOISIER 2007

Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:

ISTE Ltd 27-37 St George’s Road London SW19 4EU UK

www.iste.co.uk

John Wiley & Sons, Inc. 111 River Street Hoboken, NJ 07030 USA

www.wiley.com

© ISTE Ltd 2010

The rights of François Villeneuve and Luc Mathieu to be identified as the authors of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act 1988.

Library of Congress Cataloging-in-Publication Data

Geometric tolerancing of products / edited by Francois Villeneuve, Luc Mathieu.

p. cm.

Includes bibliographical references and index.

ISBN 978-1-84821-118-6

1. Tolerance (Engineering) 2. Geometry, Descriptive. I. Villeneuve, Francois, 1960- II. Mathieu, Luc, 1954-

TS172.G467 2010

620'.0045--dc22

2010003707

British Library Cataloguing-in-Publication DataA CIP record for this book is available from the British LibraryISBN 978-1-84821-118-6

PART I

Geometric Tolerancing Issues

Chapter 1

Current and Future Issues in Tolerancing: the GD&T French Research Group (TRG) Contribution1

1.1. Introduction

This book, entitled Geometric Tolerancing of Products, shows that especially in France a wealth of research work exists in this domain. This work highlights some difficult scientific stumbling blocks, the removal of which is of great importance in pursuing innovation in the development of industrial products. For many years this work has appeared limited, in terms of its response to specific problems concerning the different jobs in engineering (design, manufacturing methods, assembly methods, production and control). It is now, however, moving in new directions in the control of product/process integration, helping towards the development of the PLM (product life-cycle management) concept in companies.

Even though the geometric performance of the means of production has progressed enormously over recent decades, geometric variations in the manufactured products exist and probably always will. Certainly the geometric defects observed have diminished in size but they are always there and play an important role in the quality and cost of products. Mastering these geometric variations throughout the product life cycle remains an undeniable performance factor for companies. Moreover, in the virtual and simulation era, it is no longer sufficient to design numerical models in CAD representing an ideal geometry. It is becoming increasingly crucial to make a realistic simulation of all of the behaviors, products, manufacturing, assembly, disassembly and control processes, and each of these in 3D. Finally, no model can be validated without being used in a real situation. The important recent developments in dimensional metrology, as much in mechanics as in optics, must also be employed in order to identify the parameters causing the deviations generated by manufacturing processes.

These new challenges for the industrial world have greatly encouraged research into tolerancing and this activity is not new. It was initiated in France in the 1970s in the ENS de Cachan, by Professors Pierre Bourdet and Andr Clment, among others. Their work revealed research areas to others, thus leading to the creation of research groups across the whole country. The aim of this book is not only to propose a synthesis of the most recent research results of the different French research teams today, but also to offer a shared vision of examples in common resulting from a regular exchange of views that have animated meetings of the Tolerancing Research Group (TRG) since 2001.

1.2. Presentation of the Tolerancing Resarch Group: objectives and function

The first discussions about the creation of the Tolerancing Research Group (TRG) go back to April 2001 at the AIP-Primca Colloquium, which takes place every two years at La Plagne. The TRG was officially created on April 24, 2001 at the Ecole Normale Suprieure of Cachan, during a work meeting on the occasion of the international seminar on computer-aided tolerancing of the International Academy for Production Engineering (CIRP). Franois Villeneuve from UJF Grenoble, University of Grenoble, and Luc Mathieu from CNAM Paris created this group, which they head to this day.