多线段孔型连轧棒线材力能参数分析  

Analysis on mechanical parameters of bar and wire with multiple-line rolling passes

作　　者：帅美荣[1,2] 李铂涛 刘昊 

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]山西省冶金设备设计理论与技术重点实验室,山西太原030024

出　　处：《锻压技术》2016年第1期137-141,共5页Forging & Stamping Technology

基　　金：山西省自然科学基金资助项目(2014011026-1);校博士启动基金(20122037)

摘　　要：三辊轧制技术已经广泛应用于有色金属棒线材轧制,但三辊轧制变形复杂,常规方法计算的力能参数误差较大。根据三辊轧制时棒材的变形特点,采用上限法原理推导了多线段三辊轧制力能参数计算模型。即通过曲边三角形理论,建立连轧变形区的动可容速度场,获得棒线材塑性变形的总功率,从而求出轧制力矩、轧制力。并在八机架多线段三辊轧机上进行了TC4棒线材试验轧制,通过检测获得连轧电流变化值,间接计算出各道次的轧制力矩、轧制力。结果表明,道次力能参数理论计算值均大于实测值,轧制力偏差在1.25%~5.13%之间,轧制力矩偏差在4.07%~7.45%之间。结果吻合良好,能够满足实际需求。因此运用上限法计算复杂的三辊孔型,能够较为方便地得到准确的轧制力能参数。Three-roll rolling technology has been widely used in rolling process of nonferrous metal bar and wire. However, due to com- plex 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 de- duced 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 cal- culated 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.

关 键 词：上限法 多线段孔型 力能参数 三辊轧制 动可容速度场 

分 类 号：TG335.6[金属学及工艺—金属压力加工]