Transactions of Materials and Heat Treatment

Title：Influence of anisotropy on contact stress of drawing die interface in sheet metal drawing process

Authors： Zhang Peng Wang Chengyong Wang Siyan Lu Zhibing Zhang Xinyi Qiao Chunwei

Unit： Hefei University of Technology

KeyWords： anisotropy deep-drawing contact stress finite element method

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):14-19

Abstract：

For the problem of partial premature wear of the stamping die caused by the excessive and non-uniform contact stress in the stamping process of sheet metal and based on the typical cylindrical cup deep-drawing process, the influence of the normal anisotropy R- and the planar anisotropy ΔR on the contact stress was investigated. The equation of contact stress at die radius was deduced. The correlation among the contact stress, R- and the distribution of the radical stress was researched. The distribution of the contact stress on the isotropic sheet, the normal anisotropic sheet and the planar anisotropic sheet was investigated by the finite element method respectively. The theoretical calculation was in well consistent with the numerical simulation results. Conclusion shows that the contact stress is inversely proportional to R- and its distribution depends on the planar anisotropy. The maximum contact stress is at the rolling direction when ΔR<0, whereas the minimum contact stress is at rolling direction when ΔR>0.

Funds：

国家自然科学基金资助项目（51275146）；教育部科学研究重大项目（311025）；第47批“留学回国人员科研启动基金”

张鹏（1990-），男，硕士研究生

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