Parametric Tolerance Analysis of Mechanical Assembly Using FEA and Cost Competent Tolerance Synthesis Using Neural Network

Govindarajalu Jayaprakash, Karuppan Sivakumar

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DOI: 10.4236/jsea.2010.312134                

Abstract

Tolerance design plays an important role in the modern design process by introducing quality improvements and limiting manufacturing costs. Tolerance synthesis is a procedure that distributes assembly tolerances between components or distributes final part design tolerances between related tolerances. Traditional tolerance design assumes that all objects have rigid geometry, overlooking the role of inertia effects on flexible components of assembly. The variance is increasingly stacked up as components are assembled without considering deformation due to inertia effects. This study deals with the optimal tolerance design for an assembly simultaneously considering manufacturing cost, quality loss and deformation due to inertia effect. An application problem (motor assembly) is used to investigate the effectiveness and efficiency of the proposed methodology.

Keywords

Compliant Assembly, Inertia Effects Quality, Loss Function, FEA

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	A. Jeang, “Optimal Tolerance Design by Response Surface Methodology,” International Journal of Production Research, Vol. 37, No. 14, 1999, pp. 3275-3288. doi: 10.1080/002075499190284
[2]	C. X. Feng and A. Kusiak, “Design of Tolerance for Quality,” Proceedings of International ASME Design Theory and Methodology Conference, Minneapolis, Vol. 668, 1994, pp.19-27.
[3]	A. Jeang, “An Approach of Tolerance Design for Quality Improvement and Cost Reduction,” International Journal of Production Research, Vol. 35, No. 5, 1997, pp. 1193-1211. doi:10.1080/002075497195272
[4]	C. C. Wu and G. R. Tang, “Tolerance Design for Products with Asymmetric Quality Losses,” International Journal of Production Research, Vol. 36, No. 9, 1998, pp. 2529-2541. doi:10.1080/002075498192670
[5]	A. Jeang, “Tolerance Chart Optimization for Quality and Cost,” International Journal of Production Research, Vol. 36, No. 11, 1998, pp. 2969-2983. doi:10.1080/002075498192238
[6]	A. Jeang, “Optimal Tolerance Design by Response Surface Methodology,” International Journal of Production Research, Vol. 37, No. 14, 1999, pp. 3275-3288. doi: 10.1080/002075499190284
[7]	S. C. Diplaris and M. M. Sfantsikopoulos, “Tolerancing for Enhanced Quality and Optimum Cost,” Proceedings of the 33rd International MATADOR Conference, Manchester, 1999, pp. 539-544.
[8]	F. H. Speckhart, “Calculation of Tolerance Based on Minimum Cost Approach,” Journal of Engineering for Industry-Transactions of the ASME, Vol. 94, No. 2, 1972, pp. 447-453. doi:10.1115/1.3428175
[9]	M. F. Spotts, “Allocation of Tolerances to Minimize Cost of Assembly,” Journal of Engineering for Industry-Transactions of the ASME, Vol. 95, No. 3, 1973, pp. 762-764.
[10]	K. W. Chase, W. H. Greenwood, B. G. Loosli and L. F. Hauglund, “Least Cost Tolerance Allocation for Me- chanical Assemblies with Automated Process Selection,” Manufacturing Review, Vol. 3, No. 1, 1990, pp. 49-59.
[11]	Z. Dong, W. Hu and D. Xue, “New Production Cost-Tolerance Models for Tolerance Synthesis,” Journal of Engineering for Industry, Vol. 116, No. 116, 1994, pp. 199-205. doi: 10.1115/1.2901931
[12]	R. S. Robust, “Design by Tolerance Allocation Considering Quality and Manufacturing Cost,” International Advances in Design Automation, Vol. 69, No. 1, 1994, pp. 219-226.
[13]	M. Krishnasawamy and R. W. Mayne, “Optimizing Tolerance Allocation Based on Manufacturing Cost,” International Advances in Design Automation, Vol. 69, No. 1, 1994, pp. 211-217.
[14]	H.-C. Zhang and H. Huang, “Applications of Neural Networks in Manufacturing: A-State-of-the-Art Survey,” International Journal of Production Research, Vol. 33, No. 3, 1995, pp. 705-728. doi:10.1080/00207549508930175
[15]	D. E. Rumelhart and J. L. McClelland, “Parallel Distributed Processing Exploration in the Microstructure of Cognition,” 2nd Edition, Cambridge MA, USA, 1986.
[16]	R. P. Lippmann, “An Introduction to Computing with Neural Nets,” IEEE ASSP Magazine, Vol. 3, No. 4, 1987, pp. 4-22. doi:10.1109/MASSP.1987.1165576
[17]	C. Zhang and B. Wang, “Robust Design of Assembly Design and Machining Tolerance Allocations,” IIE Transactions, Vol. 30, No. 1, 1998, pp. 17-29. doi:10.1080/0 7408179808966434
[18]	M. D. Al-Ansary and I. M.Deiab, “Concurrent Optimization of Design and Machining Tolerance Using the Genetic Algorithm Method,” International Journal of Machine Tools and Manufacture, Vol. 37, No. 12, 1997, pp.1721-1731. doi:10.1016/S0890-6955(97)00033-3
[19]	G. Jayaprakash, K. Sivakumar and M. Thilak, “Parametric Tolerance Analysis of Mechanical Assembly by Developing Direct Constraint Model in Cad and Cost Competent Tolerance Synthesis,” Intelligent Control and Automation, Vol 1, No. 1, 2010, pp. 1-14. doi:10.4236/ica.2010.11001
[20]	S. J. Hu. and J. Camelio, “Modeling and Control of Compliant Assembly Systems.” CIRP Annals-Manufacturing Technology, Vol. 55, No.1, 2006, pp.19-22. doi:10.1016/S 0007-8506(07)60357-6
[21]	M. L. Stewart and K. W. Chase, “Variation Simulation of Fixture Assembly for Compliant Structures Using Piece Wise-Linear Analysis,” American Society of Mechanical Engineers, Vol. 16, No. 1, 2005, pp. 591-600.
[22]	R. Soderberg, L. Lindkvist, S. Dahlstrom, “Computer-Aided Robustness Analysis for Compliant Assemblies,” Journal of Engineering Design, Vol. 17, No. 5, 2006, pp. 411-428. doi:10.1080/09544820500275800
[23]	K. Xie, L. Wells, J. A. Camelio and B. D. Youn, “Variation Propagation Analysis of Compliant Assemblies Considering Contact Interaction,” Journal of Manufacturing Science and Engineering, Vol. 129, No. 5, 2007, pp. 934-942. doi:10.1115/1.2752829
[24]	A. M. Irfan and P. J. Neal, “Framework of an Integrated Tolerance Synthesis Model and Using FE Simulation as a Virtual Tool for Tolerance Allocation in Assembly Design,” Journal of Material Processing Technology, Vol. 150, No. 1-2, 2004, pp. 182-193. doi:10.1016/j.jmatprotec.2004.01.036
[25]	L. Pierre, D. Teissandier and J. P. Nadeau, “Integration of Thermomechanical Strains into Tolerancing Analysis,” International Journal on Interactive Design and Manu- facturing, Vol. 3, No. 4, 2009, pp. 247-263.
[26]	A. Jeang, T. K. Cheng and C. L.Chang, “A Statistical Dimension and Tolerance Design for Mechanical Assembly under Thermal Impact,” The International Journal of Advanced Manufacturing Technology, Vol. 20, No. 12, 2002, pp. 907-915. doi:10.1007/s001700200214
[27]	D. Kalyanmoy, “Optimization for Engineering Design: Algorithms and Examples,” Prentice-Hall of India Pvt.Ltd, India, 1995.
[28]	J. J. Shah and M. Mantyka, “Parametric and Feature-based CAD/CAM-Concepts, Techniques and Applications,” Wi- ley, New York, 1994.
[29]	M.-C. Chen, “Tolerance Synthesis by Neural Learning and Nonlinear Programming,” International Journal of Pro- duction Research, Vol. 70, No. 1, 2001, pp. 55-65.