scholarly journals Formability and lubrication of a B-pillar in hot stamping with 6061 and 7075 aluminum alloy sheets

2017 ◽  
Vol 207 ◽  
pp. 723-728 ◽  
Author(s):  
Yong Liu ◽  
Zhoujie Zhu ◽  
Zijian Wang ◽  
Bin Zhu ◽  
Yilin Wang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Hot Stamping ◽  
7075 Aluminum Alloy

scholarly journals Research on High Temperature Stamping Forming Performance and Process Parameters Optimization of 7075 Aluminum Alloy

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5485
Author(s):  
Zheng Ma ◽  
Hongchao Ji ◽  
Xiaomin Huang ◽  
Wenchao Xiao ◽  
Xuefeng Tang
Keyword(s):  
Neural Network ◽  
Aluminum Alloy ◽  
Bp Neural Network ◽  
Hot Stamping ◽  
Strain Curve ◽  
Parameters Optimization ◽  
Forming Limit ◽  
7075 Aluminum Alloy ◽  
Blank Holder ◽  
Speed Increase

The stress strain curve of 7075 aluminum alloy in the temperature range of 310 °C to 410 °C was obtained by Gleeble-3800. By Nakazima test, the isothermal thermoforming limit diagrams of 7075 aluminum alloy at different deformation temperatures and stamping speeds were acquired. Moreover, the parameters of automotive S-rail hot stamping process were optimized by GA-BP neural network. The results show that the forming limit curve of 7075 aluminum alloy increases as the deformation temperature and stamping speed increase. The predicted optimal parameters for hot stamping of automotive S-rails by GA-BP neural network are: stamping speed is 50 mm/s, friction coefficient between die and blank is 0.1, and blank holder force is 5 kN. The maximum thinning rate at this process parameter is 9.37%, which provided a reference for 7075 aluminum alloy automotive S-rail hot stamping.

scholarly journals Hot Stamping of a B-Pillar Reinforced Panel With 7075 Aluminum Alloy and the Feasibility Study of Short-Time Aging

2021 ◽  
Vol 7 ◽  
Author(s):  
Yong Liu ◽  
Jiahao Li ◽  
Liang Wang ◽  
Kai Wang ◽  
Bin Zhu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Solution Heat Treatment ◽  
Hot Stamping ◽  
Great Majority ◽  
Property Testing ◽  
7075 Aluminum Alloy ◽  
Before And After ◽  
Blank Holding Force ◽  
Formed Part ◽  
Short Time

The hot stamping of a B-pillar reinforced panel with 7075 aluminum alloy was carried out in an industrial production line. The effect of blank holding force (BHF) on the formability of the B-pillar reinforced panel and the effect of solution heat treatment (SHT) time on the mechanical properties were studied. Additionally, the forming precisions of a formed part before and after standard aging were detected further. Finally, both standard aging and short-time aging processes were carried out to investigate the feasibility of short-time aging for real parts. The stamping results demonstrated that lower BHF or no blank holding should be used during hot stamping to avoid cracking and wrinkling. The detection of forming precisions indicated that the great majority of measured points on the part were within ±1 mm of nominal. The mechanical property testing showed that the strength of the formed parts after a short-time aging was up to more than 90% of the as-received T6 state and more than 93% of the time can be reduced if the 90% of strength can be accepted.

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