Transactions of Materials and Heat Treatment

Title：Optimization on bending springback of U-shaped parts based on response surface method

Authors：

Unit：

KeyWords：

ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(1):63-68

Abstract：

The springback is a prominent problem in bending process of U-shaped parts. Combining with response surface method (RSM) and finite element simulation software Dynaform, and based on the U-shaped bending standard test questions of NUMISHEET'93, the die fillet radius was selected as Rd=8 mm, the three parameters of die clearance, friction coefficient and stamping speed were taken as the influence factors, the springback displacement in vertical direction was taken as the optimization objective, and seventeen groups of experiment schemes were established to simulate the bending process of U-shaped parts. Then, the data of seventeen groups were fitted and processed by Design-Expert 8.1, and the quadratic non-linear regression equation for the optimization objective and the optimized combination of parameters were obtained with the die clearance of 1 mm, the friction coefficient of 0.15 and the stamping speed of 800 mm·s-1. Furthermore, the optimized combination of parameters was substituted into the finite element software, and the obtained springback displacement of 0.731 mm was about 1% different from the equation fitting value of 0.738 mm. On the basis of previous studies, the springback displacement was further reduced by 26.2%. Finally, the actual bending experiment was carried out, and the combination of RSM and Dynaform reduced the times of finite element simulation and effectively improved the forming accuracy and quality of sheet metal bending.

Funds：

上海工程技术大学校企产学合作资助项目((17)CL-003)

作者简介：姜天亮（1992-），男，硕士研究生 E-mail：670740295@qq.com 通讯作者：龚红英（1974-），女，博士，教授 E-mail：ghyyw1974@163.com

Reference：

[1]缪军，姜天亮，龚红英. 基于Dynaform的L形件弯曲工艺参数优化分析[J]. 上海工程技术大学学报, 2018, 32(3):46-51.

Miao J， Jiang T L，Gong H Y. Optimal analysis of bending process parameters of L-shaped parts based on Dynaform [J]. Journal of Shanghai University of Engineering and Technology, 2018, 32 (3): 46-51.

[2]Choi K K, Kim N H. Design optimization of springback in a deepdrawing process[J]. AIAA Journal, 2002, 40(1): 147-153.

[3]Wagoner R H, Lim H, Lee M G. Advanced issues in springback[J]. International Journal of Plasticity, 2013, 4545: 3-20.

[4]Viswanathan V, Kinsey B, Cao J. Experimental implementation of neural network springback control for sheet metal forming[J]. Journal of Engineering Materials and Technology, 2003, 125(2): 141-147.

[5]Kitayama S, Huang S, Yamazaki K. Optimization of variable blank holder force trajectory for springback reduction via sequential approximate optimization with radial basis function network[J]. Structural and Multidisciplinary Optimization, 2013, 47(2):289-300.

[6]Jiang C, Han X, Liu G R, et al. The optimization of the variable binder force in U-shaped forming with uncertain friction coefficient[J]. Journal of Materials Processing Technology, 2007, 182(1-3):262-267.

[7]Sharad G, Nandedkar V M . Springback in sheet metal U bending-fea and neural network approach[J]. Procedia Materials Science, 2014, 6:835-839.

[8]林忠钦，刘罡，李淑慧，等. 应用正交试验设计提高U形件的成形精度[J].机械工程学报,2002,38(3):83-89.

Lin Z Q，Liu G，Li S H，et al. Improving the forming accuracy of U-shaped parts by orthogonal experimental design [J]. Journal of Mechanical Engineering, 2002, 38(3): 83-89.

[9]陈磊，杨继昌，张立文. 板料弯曲回弹影响因素的有限元模拟研究[J].材料科学与工艺,2007,15(2):269-272.

Chen L，Yang J C，Zhang L W. Finite element simulation study on Influencing factors of sheet metal bending springback [J]. Material Science and Technology, 2007, 15(2): 269-272.

[10]Velmanirajan K, Thaheer A S A, Narayanasamy R, et al. Numerical modelling of aluminium sheets formability using response surface methodology[J]. Materials & Design, 2012, 41:239-254.

[11]苟春梅, 董静. 基于正交试验的车身加强板拉延成形多目标优化[J]. 锻压技术, 2018,43(5)：41-44.

Gou C M, Dong J. Multi objective optimization of drawing forming of body stiffener based on orthogonal test [J]. Forging & Stamping Technology, 2018, 43(5)：41-44.

[12]张高贤. U形件成形工艺参数优化研究[D].杭州:浙江大学,2004.

Zhang G X. Study on Optimization of Forming Process Parameters for U-shaped Parts [D]. Hangzhou: Zhejiang University, 2004.

[13]宋飞飞，杨合，李恒，等. TA18高强钛管数控弯曲回弹工艺参数影响的显著性分析[J]. 稀有金属材料与工程, 2013, 42(1):43-48.

Song F F，Yang H，Li H，et al. Significance analysis of the influence of numerical control bending springback process parameters on TA18 high strength titanium tubes [J]. Rare Metal Materials and Engineering, 2013, 42(1): 43-48.

Service：

【This site has not yet opened Download Service】【Add Favorite】