Transactions of Materials and Heat Treatment

Title：Stamping process of stainless steel curved beam with hat-shaped section for rail vehicle

Authors： Zhao Yanhua Yang Junxiong

Unit： CRRC Changchun Railway Vehicles Co Ltd

KeyWords： hat-shaped section SUS301LN stainless steel stamping springback orthogonal test

ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(12):72-77

Abstract：

The stamping process and springback process of stainless steel curved beam with hat-shaped section for rail vehicle were studied by finite element numerical simulation, the straightness problem of curved beam wing sheet was deeply explored from the displacement difference and residual stress state, and the reasons were analyzed. Then, an optimized expanded sheet scheme was proposed to optimize the straightness of contour edge and eliminate the invalid forming part, and the key factors and the quality level affecting the springback of stainless steel curved beam were obtained by multi-element and multi-level orthogonal test analysis. The results show that when the longitudinal tangent radii are 328 and 1248 mm, the fillet radii of punch and die are both 5 mm, the clearance between punch and die is 3580 mm and the dynamic friction coefficient is 016, the optimized expanded sheet with two tangent joined radii of 880 and 6844 mm is deformed into the curved beam, and the straightness of wing sheet edge reaches 1000∶1. In addition, the maximum springback value maintains 0300-0350 mm, and the springback is basically eliminated.

Funds：

国家自然科学基金资助项目（51101072）；吉林省科技发展计划项目（20160307015GX）

赵艳华（1977-），女，学士，工程师 E-mail：zhaoyanhua@cccarcomcn

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