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Three-roll rolling technology has been widely used in rolling process of nonferrous metal bar and wire. However, due to complex deformation during three-roller rolling, there is a large deviation by conventional calculating method for mechanical parameters. Based on a three-roll rolling deformation characteristics of bars, calculating models for mechanical parameters with three-roller rolling were deduced by the principle of upper limit method. The kinematically admissible velocity field was established through crooked triangle theory, total power of plastic deformation of bar and wire was obtained, and rolling torque and rolling force were calculated. Experiments of rolling bar and wire TC4 were done on three-roller mills with multi-line pass, and rolling torque and rolling force of each pass were indirectly calculated by detecting to obtain the change of the current. The results show that the theoretical values are greater than the measured value for mechanical parameters, the deviation of the rolling force is within the range of 1.25% to 5.13%，and the deviation of the rolling torque is within the range of 4.07% to 7.45%. The values of experiment and calculation are in good agreement, which can meet the actual needs. So it is more convenient to get accurate rolling force parameters by the upper limit method in calculating the complex three-roll pass.
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[1]郭顺兴.三辊Y型连轧机在钨钼轧制开坯中的应用[J].中国钼业,2001,25(6):34-38.
Guo S X. The application of three-roll-Y continuous rolling olling mill to the cogging of tungsten-molybdenum[J].China Molybdenum Industry,2001,25(6): 34-38.
[2]王田，陶海林，胡宗式，等.Ti-6Al-4V合金棒材纵向连轧的温度变化[A].第十四届全国钛及钛合金学术交流会论文集[C].上海,2010.
Wang T,Tao H L,Hu Z S, et al.Temperature shift of Ti-6AI-4V alloy bars in continuous rolling[A].Fourteenth National Symposium on Titanium and Titanium Alloy[C].Shanghai,2010.
[3]胡海萍,孙吉先,朱为昌,等.Y型三辊轧制变形过程有限元模拟与实验[J].北京科技大学学报,1999,21(4):372-375.
Hu H P,Sun J X,Zhu W C, et al. Deformation simulation of 3-Roll rolling with finite element method and visual-plasticity approach[J].Journal of University of Science and Technology Beijing, 1999,21(4):372-375.
[4]Baines K.Lead as a model material to simulate mandrel rolling of hot steel tube[J].Journal of Materials Processing Technology,2001,118(3): 422-428.
[5]Abrinia K, Fazlirad A.Investigation of single pass shape rolling using an upper bound method[J].Journal of Material Engineering and Performance,2010,19(4):541-552.
[6]王平,崔建忠.金属塑性成形力学[M].北京：冶金工业出版社,2010.
Wang P, Cui J Z.Metal Plastic Forming Mechanics[M]. Beijing: Metallurgical Industry Press, 2010.
[7]林志平.上限法在塑性加工工艺中的应用[M].北京:中国铁道出版社,1985.
Lin Z P.The Application of the Upper Limit Method in Plastic Processing Technology[M].Beijing: China Railway Publishing House,1985.
[8]汪飞雪,杜凤山,于辉,等.应用上限法计算三辊连轧管轧制过程中的轧制力矩[J].工程力学,2013,30(5):259-264.
Wang F X,Du F S,Yu H, et al. Calculation of rolling toque in the process of three-roll mandrel mill by upper-bound method[J].Engineering Mechanics,2013,30(5):259-264.
[9]Rubio E M, Marín M, Domingo R,et al.Analysis of plate draw-ing processes by the upper bound method using theoretical work-hardening materials[J].The International Journal of Advanced Manufacturing Technology,2009,40(4):261-269.
[10]王晓军.实例证明上限解的极值等于理论载荷[J].塑性工程学报,2011,18(1):107-109.
Wang X J.Conforming the extremum of upper bound solution with theoretical solution by an example[J]. Journal of Plasticity Engineering,2011,18(1): 107-109.
[11]杨守山.有色金属塑性加工学[M].北京：冶金工业出版社,1982.
Yang S X.Non-ferrous Metal Shaping Processing [M].Beijing: Metallurgical Industry Press,1982.
[12]帅美荣.一种用于Y型轧机的多线段三角孔型及孔型系统[P].中国:CN201110462409.1.2012-7-4.
Shuai M R,Multi-line triangle pass and pass system for Y-mill[P].China:CN201110462409.1.2012-7-4.
[13]Hua L, Deng J D, Qian D S,et al.Using upper bound solution to analyze force parameters of three-roll cross rolling of rings with small hole and deep groove[J].The International Journal of Advanced Manufacturing Technology,2015,76(3):353-366.
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