锻压技术

预应变对铝合金板冲裁断面质量的影响

英文标题：Influence of pre-strain on quality of blanking cross section for aluminum alloy sheet

作者：胡德伟陈劼实胡晓公丕昊

分类号：TG389

出版年,卷(期):页码：2018,43(4):47-52

摘要：

设计了9组不同工艺参数的冲裁试验，以研究冲裁间隙和冲裁角度对铝合金板冲裁断面质量的影响。随着冲裁间隙的增加，对断面质量起决定作用的光亮带比例逐渐减小，冲裁角度为10°时，光亮带比例相对较高。进而设计了不同大小和方向的单向拉伸和双向等拉预应变，通过试验研究预应变对铝合金板冲裁断面质量的影响。结果显示：预应变对断面轮廓影响不大，但使光亮带比例明显降低，且对AA5182光亮带比例的影响大于AA6016；在单向拉伸预应变方向为90°、大小为5%时，光亮带比例下降值达到最大，其中AA5182为17.51%，AA6016为8.76%；预应变方向对光亮带比例影响较小，为1%；双向等拉预应变使AA5182和AA6016材料的光亮带比例下降值均大于单向拉伸预应变，分别为18.27%和16.74%。

The blanking experiments with nine sets of process parameters were designed, and the influences of blanking clearance and blanking angle on the quality of blanking cross section for aluminum alloy sheet were studied. With the increasing of blanking clearance, the proportion of bright region decreases gradually which playes a decisive role to the cross section quality. When the blanking angle is 10°, the proportion of bright region is relatively high. Furthermore, the uniaxial tensile and biaxial equal tensile experiments were designed under different values and directions of pre-strain, and the influence of pre-strain on the quality of blanking cross section for aluminum alloy sheet was studied by experiments. The results show that the profile of cross section is slightly affected by the pre-strain, but the proportion of bright region is obviously reduced, and the effect of pre-strain on the proportion of bright region of AA5182 is greater than that of AA6016. When the uniaxial tensile pre-strain is 5% in the 90° direction, the proportion of bright region is decreased to the maximum, namely, 17.51% for AA5182 and 8.76% for AA6016. Besides, the proportion of bright region is slightly affected by the pre-strain direction which is 1%. Furthermore, for AA5182 and AA6016, the proportion of bright region under biaxial equal tensile pre-strain is reduced larger than that under uniaxial tensile pre-strain, which is 18.27% and 16.74%, respectively.

基金项目：

宝钢资助项目

胡德伟（1991-），男，硕士研究生；E-mail：hudewei2009@163.com；通讯作者：陈劼实（1979-），女，博士，副研究员；E-mail：chenjieshi@sjtu.edu.cn

参考文献：

[1]Millera W S，Zhuang L，Bottema J，et al.Recent development in aluminium alloys for the automotive industry[J].Materials Science and Engineering，2000, 280(1):37-49.

[2]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.

[3]贾志宏，丁立鹏，吴赛楠，等. 汽车车身用6000系铝合金板材微观组织与热处理工艺的研究进展 [J]. 材料工程，2014,（12）:104-113.

Jia Z H, Ding L P, Wu S N, et al. Research progress on microstructure and heat treatment of 6000 series aluminum alloys sheet for automotive body [J]. Journal of Materials Engineering, 2014, (12): 104-113.

[4]穆瑞, 朱晓红, 王晓莉. 基于正交试验的波形片冲裁工艺参数优化 [J]. 锻压技术, 2016, 41(8): 159-162.

Mu Ｒ, Zhu X H, Wang X L. Optimization of blanking process parameters for cushion segment based on orthogonal experiment [J]. Forging ＆ Stamping Technology, 2016, 41 (8): 159-162.

[5]费玉石, 丁茹. 铝合金板带切边变形过程及其影响因素 [J]. 轻合金加工技术, 2011,39（2）：29-32.

Fei Y S, Ding R. Process of edge-trimming deformation of aluminum alloy sheet & strip and its influencing factors [J]. Light Alloy Fabrication Technology, 2011, 39（2）:29-32.

[6]Spiák E, Majerníková J, Kacák L. Formability of thin sheets from aluminum alloys [J]. Advances in Science and Technology Research Journal, 2016, 10(32), 248-253.

[7]刘静, 张明, 陈浩. 基于响应面法的台阶式凸模冲裁工艺参数优化 [J]. 塑性工程学报, 2016, 23(8): 52-57.

Liu J, Zhang M, Chen H. Parameters optimization of step-shaped-punch blanking based on response surface methodology [J]. Journal of Plasticity Engineering, 2016, 23(8): 52-57.

[8]Li M. An experimental investigation on cut surface and burr in trimming aluminum autobody sheet [J]. International Journal of Mechanical Sciences, 2000, 42(5): 889-906.

[9]Michael K, Florian S, Daniel O, et al. On the influence of different parameters on the characteristic cutting surface when shear cutting aluminum [J]. Procedia CIRP, 2017, 63：230-235.

[10]Le Q B, Devries J A, Golovashchenko S F, et al. Analysis of sheared edge formability of aluminum [J]. Journal of Materials Processing Technology, 2014, 214(4): 876-91.

[11]王晨. 铝合金汽车制件的冲压工艺及模具设计 [J]. 模具制造, 2009, 9(2): 1-4.

Wang C. Forming analysis and die design for the aluminum alloy automobile parts [J]. Die & Mould Manufacture, 2009, 9(2):1-4.

[12]高阳. 自然失效与预应变对SAE1004钢—AA6111铝合金板材无钉铆接接头强度的影响 [D]. 郑州：郑州大学，2014.

Gao Y. Effect of Aging and Pre-strain on the Strength of Clinched Galvanized SAE1004 Steel-to-Aluminum AA6111 Joints. [D]. Zhengzhou: Zhengzhou University, 2014.

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