Transactions of Materials and Heat Treatment

Title：Treatment of element distortion for ring rolling process

Authors： SHANGGUAN Tong-ying ZHANG Xue-bin

Unit： Zhong Zhou University Henan University of Science and Technology

KeyWords： ring rolling hourglass control artificial damping method artificial stiffness method

ClassificationCode：TG3；O34

year,vol(issue):pagenumber：2011,36(6):59-62

Abstract：

To handle the element distortion caused by hourglass in the dynamic explicit simulation of ring rolling, controlling methods in the FEA were studied. A rectangular section ring rolling was simulated. In the initial phase, the hourglass energy and the ring deformation were small. With the ring deformation increasing, much more hourglass energy was required. With the artificial damping method, the needed hourglass energy was about 20% of internal energy, while only 5% was needed with the artificial stiffness method. The internal energy was much less disturbed by the hourglass. with the artificial damping method, the damping factor was between 0.05 and 0.15, while the hourglass energy was the smallest when the 0.1 was adapted. With the artificial stiffness hourglass method, the stiffness factor was between 0.001 and 0.15, When stiffness factor was 0.05，the hourglass energy was the smallest.

Funds：

河南科技大学博士科研启动基金资助项目；“高档数控机床与基础制造装备”科技重大专项资助项目(2009ZX04014-074-05)；华中科技大学材料成形与模具技术国家重点实验室开放基金资助项目(09-12)；河南科技大学校基金资助项目(2004ZY032)

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