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http://dx.doi.org/10.5228/KSPP.2008.17.8.600

Process Planning and Die Design for the Super Hot Forging Product, the Piston Crown Used in Marine Engine  

Hwang, B.C. (부산대학교 기계기술연구원)
Lee, W.H. (부산대학교 기계공학부)
Bae, W.B. (부산대학교 기계공학부)
Kim, C. (부산대학교 기계기술연구원)
Publication Information
Transactions of Materials Processing / v.17, no.8, 2008 , pp. 600-606 More about this Journal
Abstract
In closed-die hot forging, a billet is formed in dies such that the flow of metal from the die cavity is restricted. Some parts can be forged in a single set of dies, whilst others, due to shape complexity and material flow limitations, must be shaped in multi sets of dies. The purpose of a performing operation is to distribute the volume of the parts such that material flow in the finisher dies will be sound. This study focused on the design of preforms, flash thickness and land width by theoretical calculation and finite element analysis, to manufacture the super hot forging product, 70MC type piston crown used in marine engine. The optimal design of preforms by the finite element analysis and the design experiment achieves adequate metal distribution without any defects and guarantees the minimum forming load and fully filling of the cavity of the die for producing the large piston crown. The maximum loads obtained by finite element analysis are compared with the results of experiments. The loads of the analysis have good agreements with those of the experiment. Results obtained using DEFORM-2D enable the designer and manufacturer of super hot forging dies to be more efficient in this field.
Keywords
Flash; Forming Load; Preform; Super Hot Forging Product;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 H. Y. Kim, J. J, Kim, N. S. Kim, 1993, An analysis of hot closed-die forging to reduce forging load, Journal of The Korean Society of Mechanical Engineers, Vol. 17, No. 12, pp. 2970-2981   과학기술학회마을
2 B. Tomov, R. Radev, V. Gagov, 2004, Influence of flash design upon process parameters of hot die forging, Journal of Materials Processing Technology, Vol. 157-158, pp. 620-623   DOI   ScienceOn
3 F. Fereshteh-Saniee, A. H. Hosseini, 2006, The effects of flash allowance and bar size on forming load and metal flow in closed die forging, Journal of Materials Processing Technology, Vol. 177, pp. 261-265   DOI   ScienceOn
4 B. I. Tomov, V. I. Gogav, R. H. Radev, 2004, Numerical simulations of hot die forging processes using finite element method, Journal of Materials Processing Technology, Vol. 153-154, pp. 352-358   DOI   ScienceOn
5 T. Altan, G. Ngaile and G. Shen, 2005, COLD AND HOT FORGING-Fundamentals and Applications, ASM International
6 P. J. Ross, 1996, Taguchi techniques for quality engineering : loss function, orthogonal experiments, parameter and tolerance design 2nd Edition, McGraw-Hill
7 M. C. Song, S. B. Shin, B. H. Kim, S. H. Ju, M. G. Lee, 2005, A study on the application of closed-die forging method for the large crank throw, Proceedings of the Korean Society for Technology of Plasticity Conference, May, pp. 180-183
8 S. H. Park, S. M. Yoon, S. Y. Synn, L. W. Park, J. K. Park, E. G. Lee, T. D. Kim, 1999, A study of forging equipment for one body crankshaft of medium sized marine engine, Transactions of Materials Processing, Vol. 8, No. 3, pp. 237-244