Transactions of Materials and Heat Treatment

Title：Passive hydroforming technology for ring-shaped skin parts

Authors： Li Kui Liu Bo Qiu Chaobin Lu Fan

Unit： Aviation Industry Xi′an Aircraft Industry Group Co. Ltd.

KeyWords： hydroforming liquid pressure wrinkle ring-shaped skin stress state

ClassificationCode：TG39

year,vol(issue):pagenumber：2022,47(3):103-108

Abstract：

In order to solve the wrinkling and springback phenomenon generated in the forming process of large-scale complex curvature skin parts, the passive hydroforming technology for ring-shaped skin parts was studied. The finite element analysis shows that the liquid pressure can significantly change the stress state on the outside of lip, and the suppression effect on the wrinkling phenomenon in the suspended area is obvious. When the maximum liquid pressure reaches 4 MPa, there is no wrinkling phenomenon on the outside of ring-shaped skin part. However, when the liquid pressure is low, the wrinkle height of part is the highest when the radial and circumferential stresses reach the peak values, and the circumferential and radial stresses on the outside of ring-shaped skin part tend to a fixed value with the increasing of the pressure within a certain pressure range, which makes the outside of lip part in the tension-tension stress condition and is more conducive to the forming of part. At the same time, with the increasing of pressure, the absolute values of inner and outer displacements of sheet metal gradually decrease until they tend to a fixed value. Thus, the liquid pressure can effectively restrain the relative sliding between sheet metal and punch, which makes the flow of inner and outer sheet materials for ring-shaped skin parts more uniform.

Funds：

作者简介：李奎（1989-），男，硕士，工程师 E-mail：615804786@qq.com

Reference：

[1]郎利辉，谢亚苏，王永铭. 飞机大型复杂双曲度蒙皮充液成形数值模拟及实验研究[J]. 精密成形工程, 2011，3(6): 112-116.

Lang L H, Xie Y S, Wang Y M . Aircraft large complex double curvature skin hydroforming numerical simulation and experiment research[J]. Journal of Netshape Forming Engineering, 2011，3(6): 112-116.

[2]谢洪志, 王玲,赵天章,等. 基于数字化的蒙皮拉形加载轨迹优化与应用[J]. 锻压技术,2021,46(1):56-59.

Xie H Z，Wang L，Zhao T Z，et al. Optimization and application of loading trajectory in stretch forming of skin based on digital [J]. Forging & Stamping Technology，2021,46(1):56-59.

[3]朗利辉， Danckert J, Nielsen K B，等. 板液压成形及无模充流拉深技术[J]. 塑性工程学报, 2002，(4):29-34.

Lang L H, Danckert J, Nielsen K B, et al. About sheet hydroforming and hydromechanical deep drawing without draw die[J]. Journal of Plasticity Engineering,2002，(4):29-34.

[4]Lang L H, Danckert J, Nielsen K B . Investigation into the effect of pre-bulging during hydromechanical deep drawing with uniform pressure onto the blank[J]. International Journal of Machine Tools & Manufacture, 2003, 44(6):649-657.

[5]Siegert K, Hussermann M, Lsch B, et al. Recent developments in hydroforming technology[J]. Journal of Materials Processing Technology, 2000, 98(2):251-258.

[6]Meng B, Wan M, Yuan S, et al. Influence of cavity pressure on hydrodynamic deep drawing of aluminum alloy rectangular box with wide flange[J]. International Journal of Mechanical Sciences, 2013, 77:217-226.

[7]Lang L H, Wang Y M, Xie Y S, et al. Pre-bulging effect during sheet hydroforming process of aluminum alloy box with unequal height and flat bottom[J]. Transactions of Nonferrous Metals Society of China, 2012，22（S2）：302-308.

[8]Green D E, Angara T S, Nurcheshmeh M, et al. A practical method to evaluate the forming severity of tubular hydroformed parts[J]. The International Journal of Advanced Manufacturing Technology, 2012, 62(9-12):965-980.

[9]房涛涛, 李晓星,郎利辉. 大厚度双曲度铝合金飞机蒙皮拉伸成形工艺优化[J]. 锻压技术,2021,46(1):29-36，42.

Fang T T，Li X X，Lang L H. Optimization on stretch forming process for hyperbolic aluminum alloy aircraft skin with large thickness[J]. Forging & Stamping Technology，2021,46(1):29-36，42.

[10]杨踊，孙淑铎，刘慧茹，等. 航空发动机复杂型面罩子钣充液成形技术[J]. 航空制造技术, 2010，(1):91-94,99.

Yang Y, Sun S D, Liu H R, et al. Hydro forming technology of complex profile cover sheet of aeroengine[J]. Aeronautical Manufacturing Technology, 2010, (1):91-94,99.

[11]曾一畔，董锦亮，宋炳毅，等. 飞机复杂曲面蒙皮零件充液拉深技术研究[J]. 精密成形工程, 2019, 11(3):59-65.

Zeng Y P, Dong J L, Song B Y, et al. Hydrodynamic deep drawing for complex curved skin part of aircraft[J]. Journal of Netshape Forming Engineering,2019, 11(3):59-65.

[12]Hashemi A, Hoseinpour Gollo M, Seyedkashi S M H.Process window diagram of conical cups in hydrodynamic deep drawing assisted by radial pressure[J]. Transactions of Nonferrous Metals Society of China, 2015, 25(9):3064-3071.

[13]Meng B, Wan M, Wu X D, et al. Inner wrinkling control in hydrodynamic deep drawing of an irregular surface part using drawbeads[J]. Chinese Journal of Aeronautics, 2014, 27(3):697-707.

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