Transactions of Materials and Heat Treatment

Title：Effect of billet wall thickness on roll extrusion of curved revolving cylinder

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year,vol(issue):pagenumber：2020,45(7):117-121

Abstract：

The roll extrusion was numerically simulated by software Deform-3D, the influence of billet wall thickness on the forming of curved revolving cylinder was studied, and the equivalent stress and load characteristics of billet during roll extrusion process were analyzed. The results show that with the increasing of billet wall thickness, the area of deformation zone increases, the deformation force also increases, and the metal flow is more difficult which is not conducive to forming. Furthermore, the load gradually increases with the increasing of billet wall thickness, the stroke also gradually increases, the roll extrusion equipment bears the relatively large load, and the life of forming equipment is shortened. When the reduction amount of wall thickness is less than 16.5 mm, the volume of metal flowing into the flash groove in the early stage of forming is small, the metal gradually fills the groove and flash groove in the middle and late stage, and the size of generated flash and deformation are uniform. When the reduction amount of wall thickness is equal to 16.5 mm, the metal not only fills the groove and flash groove, but also flows to the roll gap to obtain a thin flash, which is not conducive to eliminating flash in the second pass.

Funds：

国家自然科学基金资助项目(51775519)；十三五兵器创新基金(6141B012897)

魏椿雨（1995-），女，硕士研究生 E-mail：m18834160376@163.com 通讯作者：张宝红（1971-），男，博士，教授 E-mail：zhangbh@nuc.edu.cn

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