Non-linear dimensional variation analysis for sheet metal assemblies by contact modeling

The dimensional quality of product assembly is one of the most concerned issues in modern product design and manufacturing. During the assembly process, contact between rigid or non-rigid parts and/or fixtures is inevitable. The contact phenomenon of non-rigid parts, however, received little attention as compared with that of the rigid parts. We present in this paper the study of the contact problem of the non-rigid sheet metal assemblies. A systematic procedure of the non-linear dimensional variation analysis for the sheet metal assemblies is developed by using the contact finite element method and considering the friction force between the assembly surfaces. The proposed approach is validated in a case study of two sheet metal parts assembly via physical experiments. The simulation results agree well with the results obtained from physical experiments. This work provides a systematical and high-precision approach for dimensional variation analysis for non-rigid assemblies by contact modeling.

[1]  Jingxia Yuan,et al.  Deformable Sheet Metal Fixturing: Principles, Algorithms, and Simulations , 1996 .

[2]  Jaime A. Camelio,et al.  Modeling Variation Propagation of Multi-Station Assembly Systems With Compliant Parts , 2003 .

[3]  D. Ceglarek,et al.  Time-Based Competition in Multistage Manufacturing: Stream-of-Variation Analysis (SOVA) Methodology—Review , 2004 .

[4]  T. C. Woo,et al.  Tolerance Analysis for Sheet Metal Assemblies , 1996 .

[5]  Min Hu,et al.  Simulation and analysis of assembly processes considering compliant, non-ideal parts and tooling variations , 2001 .

[6]  David A. Hills,et al.  Mechanics of elastic contacts , 1993 .

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

[8]  G. Stavroulakis,et al.  Unilateral contact applications using FEM software , 2002 .

[9]  S. Jack Hu,et al.  A Unified Model for Variation Simulation of Sheet Metal Assemblies , 1998 .

[10]  Rikard Söderberg,et al.  Identifying variable effects on the dimensional quality of compliant assembly, using computer experiments , 2002, DAC 2002.

[11]  Darek Ceglarek,et al.  Flexible beam-based modeling of sheet metal assembly for dimensional control , 1997 .

[12]  Lars Lindkvist,et al.  Contact Modelling in Method of Influence Coefficient for Variation Simulation of Sheet Metal Assemblies , 2004 .

[13]  J. Arora,et al.  Review of formulations for elastostatic frictional contact problems , 2000 .

[14]  David C. Gossard,et al.  Modeling the assembly of compliant, non-ideal parts , 1997, Comput. Aided Des..

[15]  Yoram Koren,et al.  Stream-of-Variation Theory for Automotive Body Assembly , 1997 .

[16]  Jaime A. Camelio,et al.  Compliant Assembly Variation Analysis Using Component Geometric Covariance , 2004 .