You, L.H., Hu, J.H., Shi, Y.H. and Zhang, J. J., 2004. Single-patch surfaces for tool shape design and finite element analysis of hot extrusion. Journal of Materials Processing Technology, 150 (1-2), pp. 62-69.
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Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...
In this paper, a new mathematical representation of single-patch surfaces is reported. With this representation, complex tool shapes of metal forming can be described with a single surface patch which is prescribed by the boundary of the die at its entry and exit. For non-linearly converging die-surfaces, the die shapes can be effectively altered by changing the coefficients of the tangential boundary conditions. Using the obtained die-surfaces, the finite element analysis of the extrusion of hot metals from a round billet to a hexagon workpiece was carried out. A comparison of the extrusion forces and the grain sizes for the formed parts was made for the linearly and non-linearly converging dies. It was found that the non-linearly converging dies could reduce the deformation resistance remarkably, and produce more uniform grains than those using the linearly converging dies.
|Subjects:||Technology > Manufacturing and Design > Metallurgy and Materials|
|Group:||Media School > National Centre for Computer Animation|
|Deposited By:||INVALID USER|
|Deposited On:||01 Jun 2007|
|Last Modified:||07 Mar 2013 14:40|
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