Tolerance design of mechanical assembly using NSGA II and finite element analysis

The technological and financial limitations in the manufacturing process are the reason for non-achievability of nominal dimension. Therefore, tolerance allocation is of significant importance for assembly. Conventional tolerance allocation methods are limited by an assumption that all parts are rigid. Every mechanical assembly consists of at least one or more flexible parts which undergo significant deformation due to inertia effect. Finite element analysis is used to determine the deformation of components in an assembly. Therefore, integration of statistical tolerance design with finite element analysis will guarantee that the optimal tolerance values of various components of the assembly obtained as end product of the tolerance design will remain within tolerance variation. Then the product can function as intended under a wide range of operating conditions for the duration of its life. In this paper, tolerance design of a piston cylinder assembly is done to demonstrate the proposed methodology.

[1]  Ching-Shin Shiau,et al.  Optimal tolerance allocation for a sliding vane compressor , 2006 .

[2]  Singiresu S Rao,et al.  Optimum tolerance allocation in mechanical assemblies using an interval method , 2005 .

[3]  K. Sivakumar,et al.  Evolutionary sensitivity-based conceptual design and tolerance allocation for mechanical assemblies , 2010 .

[4]  Chang-Chung Li,et al.  Tolerance allocation via simulation embedded sequential quadratic programming , 2000 .

[5]  A. Jeang,et al.  Robust tolerance design by computer experiment , 1999 .

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

[7]  Shengjun Liu,et al.  Manufacturing environment-oriented robust tolerance optimization method , 2009 .

[8]  Hsien-Yu Tseng,et al.  A neural network application for reliability modelling and condition-based predictive maintenance , 2005 .

[9]  S. Jack Hu,et al.  Variation simulation for deformable sheet metal assemblies using finite element methods , 1997 .

[10]  Christopher C. Yang,et al.  Optimum tolerance design for complex assemblies using hierarchical interval constraint networks , 2003, Comput. Ind. Eng..

[11]  Serge Samper,et al.  Taking into account elastic displacements in 3D tolerancing , 1998 .

[12]  Angus Jeang,et al.  Concurrent Optimisation of Parameter and Tolerance Design via Computer Simulation and Statistical Method , 2002 .

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

[14]  Meifa Huang,et al.  Concurrent process tolerance design based on minimum product manufacturing cost and quality loss , 2005 .

[15]  Irfan Anjum Manarvi,et al.  Framework of an integrated tolerance synthesis model and using FE simulation as a virtual tool for tolerance allocation in assembly design , 2004 .

[16]  Xiaoyun Liao,et al.  Employing fractals and FEM for detailed variation analysis of non-rigid assemblies , 2005 .

[17]  M. Liang,et al.  An integrated approach to tolerance synthesis, process selection and machining parameter optimization problems , 2005 .

[18]  J. Deng,et al.  The Adaptive Branch and Bound Method of Tolerance Synthesis Based on the Reliability Index , 2002 .

[19]  Weidong Wu,et al.  Uncertainty analysis and allocation of joint tolerances in robot manipulators based on interval analysis , 2007, Reliab. Eng. Syst. Saf..