Global Consistency of Tolerances: Proceedings of the 6th CIRP International Seminar on Computer-Aided Tolerancing, University of Twente, Enschede, The Netherlands, 22-24 March, 1999 / Edition 1

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Overview

This book contains selected contributions from the 6th CIRP International Seminar on Computer-Aided Tolerancing, which was held on 22-24 March, 1999, at the University of Twente, Enschede, The Netherlands. This volume presents the theory and application of consistent tolerancing. Until recently CADCAM systems did not even address the issue of tolerances and focused purely on nominal geometry. Therefore, CAD data was only of limited use for the downstream processes. The latest generation of CADCAM systems incorporates functionality for tolerance specification. However, the lack of consistency in existing tolerancing standards and everyday tolerancing practice still lead to ill-defined products, excessive manufacturing costs and unexpected failures. Research and improvement of education in tolerancing are hot items today. Global Consistency of Tolerances gives an excellent overview of the recent developments in the field of Computer-Aided Tolerancing, including such topics as tolerance specification; tolerance analysis; tolerance synthesis; tolerance representation; geometric product specification; functional product analysis; statistical tolerancing; education of tolerancing; computational metrology; tolerancing standards; and industrial applications and CAT systems. This book is well suited to users of new generation CADCAM systems who want to use the available tolerancing possibilities properly. It can also be used as a starting point for research activities.

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Product Details

  • ISBN-13: 9780792356547
  • Publisher: Springer Netherlands
  • Publication date: 3/31/1999
  • Edition description: 1999
  • Edition number: 1
  • Pages: 439
  • Product dimensions: 9.21 (w) x 6.14 (h) x 1.00 (d)

Table of Contents

Global consistency of Dimensioning and Tolerancing 1
Optimising Tolerance Allocation for Mechanical Assemblies Considering Geometric Tolerances Based on a Simplified Algorithm 27
Functional and product specification by Gauge with Internal Mobilities (G.I.M.) 37
Development of a Computer-Aided Tolerancing System in CAD Environment 47
Towards realistic simulation of machining processes 55
Estimating position tolerance process capabilities 63
The validation of a process plan by propagated dispersion zones 73
A three dimensional tolerance transfer methodology 83
Transforming ISO 1101 Tolerances into Vectorial Tolerance Representations - A CAD-Based Approach 93
Industrial application of Vectorial tolerancing to improve clamping of forged workpieces in machining 101
Root Cause Analysis for Fixtures and Locating Schemes Using Variation Data 111
On-Machine Quality Control System for TRUE-CNC Manufacturing System 121
Tolerance Representation Scheme for Integrated Cutting Process & Inspection Planning 131
Towards easier and more functional semantics for geometrical tolerancing 139
A tolerance system to interface design and manufacturing 149
Contribution of a mathematical model of specifications of a part to their coherence analysis 157
Parametric Tolerancing 167
Mathematical representation of Tolerance Zones 177
On the education of the real geometry of mechanical parts through the tolerancing and the tridimensional metrology 187
Choice of functional specifications using graphs within the framework of education 197
TASys: A Computer aided Tolerance System based on a Variational Geometry formulation 207
Innovations in Integrating Tolerance Analysis Technologies for a Computer-Aided Tolerancing System 215
Representation of assembly and inspection processes for the tolerance analysis of automobile bodies 223
Two-Step Procedure for Robust Design Using CAT Technology 231
Detect the Unexpected- How to Find and Avoid Unexpected Tolerance Problems in Mechanisms 241
Application of TTRS method in industrial practice; Tolerance specification for industrial cooling water pumps 251
The configuration space method for kinematic tolerance analysis 261
Dynamic Tolerance Analysis, part I: A theoretical framework using bondgraphs 271
Dynamic Tolerance Analysis, part II: Issues to be resolved when applying bondgraphs 283
Tolerance evaluation system of manufactured parts based on soft gaging 293
An expert system for assessing flatness with a cmm 303
Cost Tolerance Sensitivity Analysis for Concurrent Engineering Design Support 313
Motion constraints in a 2D polygonal assembly 325
3D variational polyhedral assembly configuration 335
A Development of Statistical Tolerancing System for Optical Products 345
Modelling-Simulation-Testing of Compliant Assemblies 355
Aircraft Assembly Analysis Method Taking Into Account Part Geometric Variations 365
Integrated Tolerance Information System 375
Integrated Tolerance Management 385
Role of Statistics in Achieving Global Consistency of Tolerances 395
Tolerance Analysis And Synthesis Using Virtual Joints 405
Analysis of positional tolerance based on the assembly virtual state 415
Operations on polytopes: application to tolerance analysis 425
Author index 435
Keyword index 437
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