Extrusion die profile has a significant role on material flow characteristics, product microstructure, die life, and required load. Nowadays, economic requirements and effort to improve and homogenize metallurgical product properties have compelled the researchers to modify the conventional constant angle extrusion dies by employing streamlined die profiles. In the present research work, an optimum plane strain extrusion profile has been presented through implementation of upper bound analysis and Bezier curve in a simulated annealing (SA) algorithm to minimize the process force and its redundant work. The effect of material properties, friction conditions, reduction of area, and cross-sectional ratio on the optimum die profile is considered. The results of finite-element simulation proved that utilizing the optimum curved die instead of the constant angle die is superior regarding the decrease of the maximum required force, 10.5%, and the product inhomogeneity factor (IF), 50%. In addition, based on stress analysis of die/work piece interfaces, it is expected that the die life of optimal curved dies be longer than that of the optimum constant angle dies. Also, it has been demonstrated that the material work hardening characteristics does not have remarkable effect on the optimum curved die profile.
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February 2017
Research-Article
Die Profile Optimization of Rectangular Cross Section Extrusion in Plane Strain Condition Using Upper Bound Analysis Method and Simulated Annealing Algorithm
Hamed Farzad,
Hamed Farzad
Department of Materials Science
and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: hamed.farzad@outlook.com
and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: hamed.farzad@outlook.com
Search for other works by this author on:
Ramin Ebrahimi
Ramin Ebrahimi
Professor
Department of Materials Science and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: ebrahimy@shirazu.ac.ir
Department of Materials Science and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: ebrahimy@shirazu.ac.ir
Search for other works by this author on:
Hamed Farzad
Department of Materials Science
and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: hamed.farzad@outlook.com
and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: hamed.farzad@outlook.com
Ramin Ebrahimi
Professor
Department of Materials Science and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: ebrahimy@shirazu.ac.ir
Department of Materials Science and Engineering,
School of Engineering,
Shiraz University,
Shiraz 71946-84334, Iran
e-mail: ebrahimy@shirazu.ac.ir
1Corresponding author.
Manuscript received March 17, 2016; final manuscript received July 15, 2016; published online September 6, 2016. Assoc. Editor: Gracious Ngaile.
J. Manuf. Sci. Eng. Feb 2017, 139(2): 021006 (11 pages)
Published Online: September 6, 2016
Article history
Received:
March 17, 2016
Revised:
July 15, 2016
Citation
Farzad, H., and Ebrahimi, R. (September 6, 2016). "Die Profile Optimization of Rectangular Cross Section Extrusion in Plane Strain Condition Using Upper Bound Analysis Method and Simulated Annealing Algorithm." ASME. J. Manuf. Sci. Eng. February 2017; 139(2): 021006. https://doi.org/10.1115/1.4034336
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