主应力法计算蛇形轧制.pdfVIP

17 6 塑性工程学报 Vol1 17 No1 6 2010 12 JOURNAL OF PLAST ICITY ENGINEERING Dec1 2010 doi: 1013 6 / j1 issn1 1007- 20121 20101061021 ( 北京有色金属研究总院 有色金属制备与加工国家重点 付 垚 谢水生 熊柏青 实验室, 北京 100088) 黄国杰 程 磊 : , / 0 , / 0 , , , / 0 , , / 0 , / 0 , , : ; ; ; + : T G3351 5 1 : A : 1007-2012 (2010) 06-0103-07 Calculation of rolling force in snake rolling by slab method FU Yao XIE Shui-sheng XIONG Ba-i qing H UANG Guo-jie CHENG Lei ( State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Inst itut e f or Nonferrous Metals, Beijing 100088 China) Abstract: An analytical model for predicting t he rolling force and rolling torque during snake rolling w as constructed by using slab met hod. Then, the accuracy of the analytical model was verified by the comparison between the analytical and experimental re- sults . Using t he model, the influence of roll speed ratio, offset distance of rolls, reduction and frict ion coeff icient on rolling force and rolling torque in hot snake rolling of alum inum alloy w as investigated. The results show that, increase the roll speed rat io can increase the rolling torque of low er roll but reduce the rolling force and rolling torque of upper roll. When the speed ratio increases to cert ain extent, the slower roll would be driven by the faster roll and the rolling torque of the upper roll would become negative. Larger offset of rolls w ould cause larger rolling force and smaller rolling torque of upp