Transactions of Materials and Heat Treatment

Title：Stress of sheet metal in drawing flange area solved by slipline method

Authors： Zhang Han Wang Min Zhao Jun Zhang Litao

Unit： North China Institute of Aerospace Engineering

KeyWords： drawing unit flow tensile stress slipline method flange area micro unit

ClassificationCode：TG301

year,vol(issue):pagenumber：2018,43(6):71-73

Abstract：

In the design of sheet metal drawing process, empirical formulas are usually used to calculate the drawing force, which are sometimes very different from different resources. However, slipline method is one of methods to solve the plastic deformation force for rigidperfectly plastic material. Then, a method of solving drawing force by slipline method was introduced, force analysis was carried out on flange area of sheet metal drawing and the slipline field of deformation zone was built by slipline theory. Furthermore, the calculating formula of unit flow tension was solved based on the yield criterion and the characteristics along slipline, and the total deformation force was obtained. Through the verification with examples, the drawing force of 61 kN was obtained by slipline method and 63 kN was obtained by empirical formula. The results show that drawing force calculated by the stress according to slipline method meets the engineering requirement, which can realize the choice of equipment tonnage.

Funds：

河北省自然科学基金资助项目（E2013409002）；廊坊市科技支撑计划项目资助（2016011081）；北华航天工业学院科研基金重点项目资助（ZD-2016-03）；华南理工大学国家金属材料近净成形工程技术研究中心开放基金资助项目（2011010）

张晗（1979-），女，硕士，讲师；Email：zhanghan790108@163.com

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