Transactions of Materials and Heat Treatment

Title：Flanging of aluminum alloy part for product design

Authors： Xie Hui Bu Yufeng Cheng Wei Chu Weidong Wang Dongfu

Unit： State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Shanghai Tractor & Internal Combustion Engine Co. Ltd.

KeyWords： flanging springback aluminum alloy bend crack orthogonal test grey relational analysis

ClassificationCode：TG386

year,vol(issue):pagenumber：2017,42(6):27-32

Abstract：

For the aluminum alloy inner panel in a car body, a finite element model for the flanging and springback process was established by FE software ABAQUS, and the values of springback and crack risk were reduced by optimizing three character parameters of upper bending radius R1, lower bending radius R2 and flanging angle α and two process parameters of friction coefficient μ and die clearance T. Then, the multiobjective parameter optimization problem was transformed into a single target problem by combining orthogonal test with grey correlation analysis to get a better parameter in order to guide product design, and it was experimentally validated. The result shows that the sequences influencing on integrated target are die clearance，flange angle，upper bending radius,lower bending radius and friction coefficient. The optimized combination parameters are obtained with R1=5 mm,R2=9 mm,a=75°, μ=0.1 and T=t. The actual product is within the tolerance range of springback and without the defect of bend crack, when the optimized parameters are used to design the product.

Funds：

国家科技重大专项（2014ZX04002-071）

谢晖（1971-），男，博士，教授卜宇峰（1990-），男，硕士研究生

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