IJAT Vol.10 No.1 pp. 87-93
doi: 10.20965/ijat.2016.p0087


Punchless Drawing of Magnesium Alloy Sheet Under Cold Condition and its Computation

Minoru Yamashita and Koji Kuwabara

Department of Mechanical Engineering, Gifu University
1-1 Yanagido Gifu city, Gifu, Japan

August 11, 2015
November 21, 2015
Online released:
January 4, 2016
January 5, 2016
sheet forming, magnesium alloy, punchless forming, numerical simulation
Shallow cup drawing of magnesium alloy AZ31-O sheet was performed under cold condition using the Maslennikov’s technique. A deformable rubber pad was used, instead of the “hard” punch, in this technique. A small die profile radius was adopted, which was twice or four-times the sheet thickness. A semisolid lubricant was used for lubrication of the blank-die interface. On the other hand, the rubber-blank interface was degreased to increase friction. A limiting drawing ratio of 1.31 was obtained in the circular cup drawing. A peculiar fracture mode appeared in which the material suddenly fractured with the crack evolution emanating from the flange periphery. In the square cup drawing, an adequate blank shape was found to be circular compared with the other ones. Numerical simulation was also conducted using dynamic explicit finite element method. Adequate setting including speed scaling enabled us to predict the accurate deformation pattern and the forming force.
Cite this article as:
M. Yamashita and K. Kuwabara, “Punchless Drawing of Magnesium Alloy Sheet Under Cold Condition and its Computation,” Int. J. Automation Technol., Vol.10 No.1, pp. 87-93, 2016.
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