|
Abstract：
|
|
The mechanical property parameters of original O-state and short-time heat-treated sheets for 2B06 aluminum alloy were obtained by uniaxial tensile test. Then, the application of local heat treatment tailored heat treated blanks (THTB) in the two-pass hydroforming of aluminum alloy frame parts was simulated and verified by the finite element simulation method, and the mechanism of improving the forming ability of parts was analyzed. The simulation results show that when the original O-state sheets are used to form the frame parts, the local thinning is serious, and the rupture danger zone mostly occurs in the plane strain region. Therefore, a reasonable local heat treatment scheme makes the sheet have a gradient distribution of soft and hard materials, which significantly improves the forming ability of frame parts. Furthermore, the process parameters of laser heat treatment were determined by the laser experimental temperature measuring device, and the sheet coated with the water-based graphite heat treatment zone is heat treated to make it the THTB. Finally, the THTB is hydroformed twice to verify the accuracy of the simulation.
|
|
Funds：
|
|
国家自然科学基金资助项目（51875547）；国家自然科学基金青年基金（51205261）；沈阳市重点科技研发计划对外科技交流合作专项（17-105-6-00）
|
|
AuthorIntro：
|
|
王志坚（1974-），女，博士，教授，E-mail：wangzhijian1974@sina.com；通讯作者：宋鸿武（1981-），男，博士，副研究员，E-mail：hwsong@imr.ac.cn
|
|
Reference：
|
[1]邓学峰,张辉,陈振华. 铝合金成形性及成形工艺研究现状[J].材料导报,2005,12(19):56-59.
Deng X F, Zhang H, Chen Z H. Sheet metal formability and forming process of aluminum alloy[J]. Materials Review, 2005, 12 (19):56-59.
[2]Merklein M, Johannes M, Lechner M, et al. A review on tailored blanks-Production, applications and evaluation[J]. Journal of Materials Processing Technology, 2014, 214(2):151-164.
[3]Haase C, Wurst H. Zur frage der kalt-und warmaushrtung bei Aluminium-magnesium-silizium-legierungen[J]. Zeitschrift für Metallkunde, 1941, 33: 399-403.
[4]Geiger M, Merklein M, Staud D, et al. An inverse approach to the numerical design of the process sequence of tailored heat treated blanks[J]. Production Engineering, 2008, 2(1):15-20.
[5]Hofmann A. Deep drawing of process optimized blanks[J]. Journal of Materials Processing Technology, 2001, 119(1-3):127-132.
[6]Hung N, Marion M. Improved formability of aluminum alloys using laser induced hardening of tailored heat treated blanks[J]. Physics Procedia, 2012, 39: 318-326.
[7]Geiger M, Merklein M, Kerausch M. Finite element simulation of deep drawing of tailored heat treated blanks[J]. CIRP Annals, 2004, 2: 223-226.
[8]Siefert K, Merklein M, Nester W, et al. Enhancement of forming limits of aluminum alloys using an intermediate heat treatment[J]. AIP Conference Proceedings, 2011, 1315(1):359-364.
[9]Alexander K, Daniel W, Marion M. Influence of a short term heat treatment by conduction and induction on the mechanical properties of AA6014 alloys[J]. Physics Procedia, 2014, 56(3):1410-1418.
[10]Zarini S, Mostaed E, Vedani M, et al. Formability enhancement of Al 6060 sheets through fiber laser heat treatment[J]. Int. J. Mater. Form., 2017, 10: 741-751.
[11]Vollertsen F. Modelling the deep drawing of process optimized blanks[A]. Proc. 20th Biennial IDDRG Congress[C]. Genval: Belgium，2000.
[12]Kahrimanidis A, Wortberg D, Merklein M. Approach to minimize the distortion of 6XXX-aluminum tailor heat treated blanks in industrial applications[J]. Production Engineering, 2015, 9(5-6):569-576.
[13]Vollertsen F, Lange K, Lange K. Enhancement of drawability by local heat treatment[J]. CIRP Annals-Manufacturing Technology, 1998, 47(1):181-184.
[14]Geiger M, Merklein M, Vogt U. Aluminum tailored heat treated blanks[J]. Production Engineering, 2009, 3(4-5):401.
|
|
Service：
|
|
【This site has not yet opened Download Service】【Add
Favorite】
|
|
|
|
Copyright Forging & Stamping Technology.All rights reserved