Critical operating conditions for assemblies with parameter-dependent dimensions

This article deals with the analysis of tolerances for an assembly that is bound to meet some functional requirements over a specified range of operating parameters (e.g. temperature, pressure and speed). These can influence part dimensions due to physical effects such as thermal expansion, deformation and wear. When these influences are added to manufacturing errors, unacceptable values of functional requirements can occur under critical conditions on operating parameters. To avoid this, a designer should be able to readily evaluate the operating window allowed to the assembly by a given set of tolerance specifications. A method is proposed to help this task on the assumption that requirements are verified through worst-case linear chains of dimensional tolerances.

[1]  V. Roshan Joseph,et al.  Operating Window Experiments: A Novel Approach to Quality Improvement , 2002 .

[2]  Jean-Pierre Nadeau,et al.  Integration of thermomechanical strains into tolerancing analysis , 2009 .

[3]  Rikard Söderberg,et al.  Computer Aided Assembly Robustness Evaluation , 1999 .

[4]  Sandro Wartzack,et al.  Tolerance analysis of mechanism taking into account the interactions between deviations using meta-models , 2012 .

[5]  Kenneth W. Chase,et al.  Variation Simulation of Fixtured Assembly Processes for Compliant Structures Using Piecewise-Linear Analysis , 2005 .

[6]  Fuminobu Kimura,et al.  Designing Product Reliability based on Total Product Lifecycle Modelling , 2007 .

[7]  Martin Leary,et al.  Computer Aided Tolerancing (CAT) platform for the design of assemblies under external and internal forces , 2011, Comput. Aided Des..

[8]  Rikard Söderberg,et al.  Computer-aided tolerance chain and stability analysis , 2003 .

[9]  Sandro Wartzack,et al.  SIMULATION BASED GENERATION OF AN INITIAL DESIGN TAKING INTO ACCOUNT GEOMETRIC DEVIATIONS AND DEFORMATIONS , 2011 .

[10]  Angus Jeang,et al.  A Statistical Dimension and Tolerance Design for Mechanical Assembly Under Thermal Impact , 2002 .

[11]  Rikard Söderberg,et al.  Computer-aided robustness analysis for compliant assemblies , 2006 .

[12]  Rikard Söderberg,et al.  Improving Decision Making by Simulating and Visualizing Geometrical Variation in Non-rigid Assemblies , 2008 .

[13]  Jin Ye,et al.  Dynamic analysis of the reheat-stop-valve mechanism with revolute clearance joint in consideration of thermal effect , 2008 .

[14]  Don P Clausing.  Operating Window: An Engineering Measure for Robustness , 2004, Technometrics.

[15]  Pierre Bourdet,et al.  TAKING THE DEFORMATION INTO ACCOUNT FOR COMPONENTS' TOLERANCING , 2004 .

[16]  Alex Ballu,et al.  Geometrical reliability of overconstrained mechanisms with gaps , 2008 .

[17]  Bernard Anselmetti,et al.  Thermal dilatation in functional tolerancing , 2011 .