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

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. Front Matter....Pages i-xi Global Consistency of Dimensioning and Tolerancing....Pages 1-26 Optimising Tolerance Allocation for Mechanical Assemblies Considering Geometric Tolerances Based on a Simplified Algorithm....Pages 27-36 Functional and product specification by Gauge with Internal Mobilities (G.I.M.)....Pages 37-46 Development of a Computer-Aided Tolerancing System in CAD Environment....Pages 47-54 Towards Realistic Simulation of Machining Processes....Pages 55-62 Estimating Position Tolerance Process Capabilities....Pages 63-72 The validation of a process plan by propagated dispersion zones....Pages 73-82 A three dimensional tolerance transfer methodology....Pages 83-92 Transforming ISO 1101 Tolerances into Vectorial Tolerance Representations — A CAD-Based Approach....Pages 93-100 Industrial application of Vectorial Tolerancing to improve clamping of forged workpieces in machining....Pages 101-110 Root Cause Analysis for Fixtures and Locating Schemes Using Variation Data....Pages 111-120 On-machine quality control system for TRUE-CNC manufacturing system....Pages 121-130 Tolerance Representation Scheme for Integrated Cutting Process & Inspection Planning....Pages 131-138 Towards easier and more functional semantics for geometrical tolerancing....Pages 139-147 A tolerance system to interface design and manufacturing....Pages 149-156 Contribution of a mathematical model of specifications of a part to their coherence analysis....Pages 157-166 Parametric tolerancing....Pages 167-176 Mathematical representation of Tolerance Zones....Pages 177-186 On the education of the real geometry of mechanical parts through the tolerancing and the tridimensional metrology....Pages 187-196 Choice of functional specifications using graphs within the framework of education....Pages 197-206 TASys: A Computer Aided Tolerance System based on a Variational Geometry formulation....Pages 207-214 Innovations in Integrating Tolerance Analysis Technologies for a Computer-Aided Tolerancing System....Pages 215-222 Representation of assembly and inspection processes for the tolerance analysis of automobile bodies....Pages 223-230 Two-Step Procedure for Robust Design Using CAT Technology....Pages 231-240 Detect the Unexpected — How to Find and Avoid Unexpected Tolerance Problems in Mechanisms....Pages 241-250 Application of TTRS Method in Industrial Practice Tolerance specification for Industrial Cooling Water Pumps....Pages 251-260 The configuration space method for kinematic tolerance analysis....Pages 261-270 Dynamic Tolerance Analysis, part I: A theoretical framework using bondgraphs....Pages 271-282 Dynamic Tolerance Analysis, part II: Issues to be resolved when applying bondgraphs....Pages 283-292 Tolerance evaluation system of manufactured parts based on soft gaging....Pages 293-302 An Expert System for Assessing Flatness with a CMM....Pages 303-312 Cost Tolerance Sensitivity Analysis for Concurrent Engineering Design Support....Pages 313-324 Motion constraints in a 2D polygonal assembly....Pages 325-334 3D variational polyhedral assembly configuration....Pages 335-344 A Development of Statistical Tolerancing System for Optical Products....Pages 345-354 Modelling-Simulation-Testing of Compliant Assemblies....Pages 355-364 Aircraft Assembly Analysis Method Taking Into Account Part Geometric Variations....Pages 365-374 Integrated Tolerance Information System....Pages 375-383 Integrated Tolerance Management....Pages 385-394 Role of Statistics in Achieving Global Consistency of Tolerances....Pages 395-404 Tolerance Analysis And Synthesis Using Virtual Joints....Pages 405-414 Analysis of positional tolerance based on the assembly virtual state....Pages 415-424 Operations on polytopes: application to tolerance analysis....Pages 425-434 Back Matter....Pages 435-438

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.

Proceedings of the 6th CIRP International Seminar on Computer-Aided Tolerancing, University of Twente, Enschede, The Netherlands, 22-24 March 1999