Open Access
ARTICLE
An Optimal Pre-stress Die Design of Cold Backward Extrusion by RSM Method
C.T. Kwan, C.C. Wang1
1 NKUT, Taiwan, R.O.C
Structural Longevity 2011, 5(1), 25-32. https://doi.org/10.3970/sl.2011.005.025
Abstract
In this paper, a pre-stress die design method for cold backward extrusion with a non simple hollow cylinder die by using response surface method is
proposed. The radius of the interface and the absolute interference in the interface
of a prestress die are chosen as the design variables. Both the two design variables
are set at four levels, and then 16 combinations of design parameters are constituted
totally. A finite element based code is utilized to investigate the elastic deformation
characteristic under different design parameters, and the response surface method
is then employed to synthesize the data sets obtained from the numerical analysis,
thus establishing a maximum die effective stress prediction mode. By using the
prediction model, the optimum radius and the optimum absolute interference in the
interface under a certain inner pressure can be determined.
Keywords
Cite This Article
Kwan, C., Wang, C. (2011). An Optimal Pre-stress Die Design of Cold Backward Extrusion by RSM Method.
Structural Longevity, 5(1), 25–32. https://doi.org/10.3970/sl.2011.005.025