SUN Binyu
,
YUAN Shijian
钢铁研究学报(英文版)
According to the deformation characteristics of threeroll tube rolling, the existent disadvantages of traditional A Geleiyi and A Tselikov′s formulas were objectively analyzed. An assumption approximate to actual situation was put forward. After suitable simplification, the energy method was adopted to establish velocity fields for permissive movement in deformed areas, and the calculation formula of average unit pressure for threeroll tube rolling was deduced. The values of theoretical calculation are basically consistent with the measured values of largescale aluminum tube during onsite rolling process. The results proved that the formula is reasonable.
关键词:
energy method;unit pressure;velocity field
ZHANG Fangping
,
SUN Binyu
,
WANG Jianmei
钢铁研究学报(英文版)
According to the theories for stretch reducing process and steel tube plastic deformation, the energy method was used to mesh the rolled deformation zone of the steel tube into the upper limit elements, and an admissible velocity field was constructed to deduce a series of formulas of the inner virtual power consumption of deformed bodies. The rolling force during the stretch reducing process could be obtained by optimizing the upper limit power, which could provide guidelines for a proper choice of the stretch reducing process and devices for steel tube companies, as well as new products and devices.
关键词:
upper limit power;rolling force;velocity field
