Warm Deep Drawing of Rectangular Parts of AZ31 Magnesium Alloy Sheet Adopting Variable Blank Holder Force

2007 ◽  
Author(s):  
Peng Ying-hong ◽  
Chang Qun-feng ◽  
Li Da-yong ◽  
Zeng Xiao-qin
Keyword(s):  
Magnesium Alloy ◽  
Deep Drawing ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Magnesium Alloy Sheet ◽  
Variable Blank Holder Force ◽  
Warm Deep Drawing ◽  
Az31 Magnesium Alloy Sheet

Numerical Simulation of Warm Deep Drawing of AZ31 Magnesium Alloy Sheet with Variable Blank Holder Force

2007 ◽  
Vol 340-341 ◽  
pp. 639-644 ◽  
Author(s):  
Ying Hong Peng ◽  
Qun Feng Chang ◽  
Da Yong Li ◽  
Hu Jie ◽  
Xiao Qin Zeng
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Deep Drawing ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Magnesium Alloy Sheet ◽  
Variable Blank Holder Force ◽  
Az31 Magnesium Alloy Sheet

Blank holder force (BHF) plays an important role in sheet metal forming. Previous studies demonstrated that variable blank holder forces can improve the cold formability of steel blank, but the research on the application of variable blank holder force in warm forming of magnesium sheet forming has not been well investigated. In this study, the mechanical property of AZ31 magnesium alloy sheet is measured through some uniaxial tensile tests. In order to obtain the variational rule of the BHF, a mathematical model of BHF is deduced based on the energy theory. The variational rule of the BHF over the punch stroke is analyzed. Finally, three profiles of the BHF curve are designed, and the numerical simulation of warm deep drawing process of magnesium alloy sheet is also performed. A suitable variable blank holder force scheme is obtained through comparison among three results of simulation. The simulation indicates that the limiting drawing ratio of AZ31 magnesium alloy sheet can be improved from 3.0 to 3.5 with the suitable blank holder force varied by an inverted V curve.

Experimental Research on Warm Deep Drawing of Magnesium Alloy Sheet by Variable Blank Holder Force Control

2007 ◽  
Vol 546-549 ◽  
pp. 285-288
Author(s):  
Qun Feng Chang ◽  
Ying Hong Peng ◽  
Da Yong Li ◽  
Xiao Qin Zeng
Keyword(s):  
Magnesium Alloy ◽  
Deep Drawing ◽  
Hydraulic Press ◽  
Alloy Sheet ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Variable Blank Holder Force ◽  
Warm Deep Drawing ◽  
Working Principle ◽  
And Control

A process of warm deep drawing of magnesium alloy with variable blank holder force has been presented in this study. A hydraulic press that can realize adjustable blank holder forces was developed and its working principle and control system introduced. A warm deep drawing mould was fixed and warm deep drawing experiments are conducted on the hydraulic press. Different variation schemes of the blank holder force with the stroke of the punch was tested, and compared with experiment results. The experimental results show that adopting the variable blank holder force technique can remarkably improve the forming performance and decrease the reduction ratio of thickness from 15.21% to 12.35%. It is further demonstrated that the suitable blank holder force variation scheme is an inverted V curve with the punch stroke.

scholarly journals Non-Isothermal Simulation of Warm Circular Cup Deep Drawing Processing of an AZ31 Magnesium Alloy Sheet

2008 ◽  
Vol 49 (5) ◽  
pp. 1120-1123 ◽  
Author(s):  
Myeong Han Lee ◽  
Heon Young Kim ◽  
Heung Kyu Kim ◽  
Gi Deuck Kim ◽  
Soo Ik Oh
Keyword(s):  
Magnesium Alloy ◽  
Deep Drawing ◽  
Alloy Sheet ◽  
Az31 Magnesium Alloy ◽  
Magnesium Alloy Sheet ◽  
Az31 Magnesium Alloy Sheet
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