Tolerancing for Enhanced Quality and Optimum Cost
Abstract
The two component clearance (or interference) cylindrical fits predominate in mechanical engineering. Industrial data, experimental research and / or theoretical analysis establish for these fits upper and lower clearance limits. In accordance with the Taguchi concept any other clearance than an ideal one will contribute to lower product quality. Closer dimensional tolerances that are required in order to pursue nominal clearances impose, nevertheless, higher manufacturing costs. The paper presents a new methodology for Cost — and — Quality optimum tolerancing for both the assembly fit dimensions that takes into consideration not only the relevant manufacturing parameters and the reject costs but also enhanced quality requirements as those represented by the Taguchi approach.
Keywords
Machine Cost Tolerance Zone Lower Product Quality Taguchi Approach High Manufacturing CostPreview
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References
- [1]Kirschling, G., Qualitätssicherung und Toleranzen, Springer Verlag, Berlin, 1988.MATHGoogle Scholar
- [2]G. Taguchi, E. A. Elsayed, T. Hsiang, Quality Engineering in Production Systems, McGraw-Hill, 1989.Google Scholar
- [3]M.M. Sfantsikopoulos, “A Cost-Tolerance analytical approach for Design and Manufacturing”, Int. J. Adv. Manuf. Technology (1990), 5, p.p. 126–134.CrossRefGoogle Scholar
- [4]S.H. Yeo, B.K.A. Ngoi and H. Chen, “A Cost — Tolerance Model for process Sequence Optimisation”, Int. J. Adv. Manuf. Technology (1996), 12, pp. 423–431.CrossRefGoogle Scholar
- [5]S.C. Diplaris, M.M. Sfantsikopoulos “Cost — Tolerance Function: A new approach for cost optimum machining accuracy”, Int. J. Adv. Manuf. Technology (2000) 16: 32–38CrossRefGoogle Scholar
- [6]H.-C. Zhang, Advanced Tolerancing Techniques, John Wiley & Sons, Inc., New York, 1997Google Scholar
- [7]C. Zhang, H.P. Wang, J.K. Li, “Simultaneous optimization of Design and Manufacturing — Tolerance with Process (Machine) Selection”, Annals of the CIRP Vol. 41/1/1992.Google Scholar