The Analysis on the Stamping Formability of High Strength Steel

2021 ◽  
Vol 885 ◽  
pp. 3-9
Author(s):  
Wen Yu Ma ◽  
Jian Wei Yang ◽  
Ye Yao ◽  
Yong Qiang Zhang ◽  
Jun Zhang
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Variable Blank Holder Force ◽  
Automotive Part ◽  
Blank Shape ◽  
Shaped Blank

Recently the high strength steel has been applied in the automotive more and more widely. In this study, the effect of blank shape on the formability of an automotive part was analyzed. The three kinds of blank shapes were chosen, including a rectangular shaped blank, a blank with two corners cut straightly and a blank with two corners cut in curve. The effect of the variable blank holder force on the formability was studied. The four kinds of variable blank holder force were applied. The blank shape in this part is the blank with two corners cut curve. The results show that the blank with two corners curve is the most suitable. And the blank holder force from 1000 kN to 1500 kN is the most useful for the formability.

scholarly journals Study on forming process and spring back control of high strength sheet based on Dynaform

2018 ◽  
Vol 232 ◽  
pp. 02039
Author(s):  
cunping Liu
Keyword(s):  
Velocity Profile ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Part ◽  
Drawing Process ◽  
Spring Back ◽  
Blank Holder Force ◽  
Forming Process ◽  
Blank Holder ◽  
Motion Mode

The drawing process of a high strength steel part without blank holder force was numerically simulated based on Dynaform. In present investigation, the drawing velocity and velocity profile motion of punch was studied by simulating the drawing operation of high strength steel part. The results show that restricting drawing velocity and controlling velocity profile motion of punch could all reduce the spring back. The measure of restricting drawing velocity could reduce non-pressure forming spring back about 31% and Trapezoidal motion mode of punch is the most beneficial to reduce spring back.

Springback Experimental Research of Advanced High-Strength Steel

2013 ◽  
Vol 842 ◽  
pp. 284-288
Author(s):  
Jun Yi Ke ◽  
Yu Qi Liu ◽  
Gui Li ◽  
Ting Du
Keyword(s):  
Yield Stress ◽  
Experimental Research ◽  
High Strength Steel ◽  
High Strength ◽  
Holding Time ◽  
Impact Factors ◽  
Advanced High Strength Steel ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Springback Angle

Springback is one of the major problems of high strength steel.Based on the NUMISHEET’96 S_Rail standard examination questions,using the characteristics of the servo press 200T,the blank holder force,different pressure holding time and the holding times of advanced high strength steel DP280-440, DP340-590, DP400-780 are studied. By changing one of the three impact factors ,three group experiments are carried out.The experimental results show that the springback can change evidently with the increasing of the blank holder force and the holding times,but the holding time has little influence on the springback.What’s more,the springback angle of DP400-780 is the biggest ,proving the higher the yield stress,the bigger the springback angle.Therefore, in the stamping of advanced high strength steel, increasing the blank holder force and holding times are effective methods to solve the springback.

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