Determination of Hot Stamping Friction Coefficient of 7075 Aluminum
Xiangji Li,Xu Yan,Zhiqiang Zhang,Mingwen Ren,Hongjie Jia +4 more
- Vol. 11, Iss: 7, pp 1111
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TLDR
In this paper, the effect of different lubricants on the force displacement curve, material inflow, surface appearance, and thickness distribution of the formed part was analyzed, and the results showed that a good lubrication effect could be obtained with the molybdenum disulfide lubricant.Abstract:
Aluminum alloy hot stamping technology can improve the formability of materials and obtain parts with high dimensional accuracy. Friction behavior in the hot stamping process is very important for forming quality. Accurate friction coefficient is helpful to improve the prediction accuracy of forming defects. It is hard to obtain the friction coefficient by simple experiments due to the complicated thermal–mechanical coupling and contact conditions during the hot stamping of aluminum alloys. In order to explore the effect of friction behavior on forming quality, hot stamping experiments of 7075 aluminum alloy U-shaped parts with different lubricants were carried out. The influence of different lubricants on the force–displacement curve, material inflow, surface appearance, and thickness distribution of the formed part was analyzed. The results showed that a good lubrication effect could be obtained with the molybdenum disulfide lubricant. The friction coefficient under different lubrication conditions was obtained by using the inverse problem optimization method. Compared with the experimental results, the determined friction coefficients could accurately predict the force–displacement curves and the thickness distributions of formed parts under different lubrication conditions.read more
Citations
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Investigation of different lubricant classes for aluminium warm and hot forming based on a strip drawing test
TL;DR: In this paper , the authors examined the temperature influence on friction and wear performance in an extensive comparison of different tool lubrication and the bonding performance of different lubricants to the die surface.
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Study on Friction Characteristics of AA7075 Aluminum Alloy under Pulse Current-Assisted Hot Stamping
TL;DR: In this paper , a reciprocating friction tester was designed to study the friction characteristics between AA7075 aluminum alloy and P20 steel under different current densities, and the results indicated that the new current friction model had a better fit than the fixed one.
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Process Optimization of the Hot Stamping of AZ31 Magnesium Alloy Sheets Based on Response Surface Methodology
TL;DR: In this paper , the authors used the finite element solver ABAQUS/Explicit to establish the numerical model of the magnesium alloy hot-stamping process, and then they applied the response surface methodology (RSM) to optimize the influencing factors in sheet hot stamping at a forming temperature of 200 °C.
References
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Frédéric Barlat,Frédéric Barlat,J.C. Brem,Jeong W. Yoon,Jeong W. Yoon,Kwansoo Chung,Re Dick,D.J. Lege,Farhang Pourboghrat,Shi-Hoon Choi,E. Chu +10 more
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Journal ArticleDOI
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Frédéric Barlat,R. Becker,Hayashida Yasuhiro,Maeda Yasuhiro,Masahiro Yanagawa,Kwansoo Chung,J.C. Brem,D.J. Lege,Kuniaki Matsui,Shawn J. Murtha,Shigeo Hattori +10 more
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Jens Kondratiuk,Patrick Kuhn +1 more
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Solution Heat Treatment and Cold Die Quenching in Forming AA 6xxx Sheet Components: Feasibility Study
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