外台阶环闭式径向轧制轴向体积流动控制策略

Axial Material Flow Control Strategy of Close-radial Ring Rolling with Outer-stepped-section

外台阶环件截面变化程度大,实际轧制极易出现直径过大而截面形状充填不足的现象。基于典型的外台阶环件分析了该类环件的毛坯设计原则,提出了一种新的差速进给方式,即对环件大径段和小径段采用不同的进给速度,以确保材料在轧制中沿轴线方向无流动,确保外台阶环的良好成形。利用Abaqus软件模拟了传统进给下矩形截面环坯、两种台阶截面环坯和差速进给下台阶截面环坯的材料流动情况。结果表明,毛坯设计方法和新的差速进给方法是合理的。轧制后外台阶环件的截面形状和直径尺寸达到了要求。

Because of the great change of the outer-stepped-section ring, it easily produces too large diameter and insufficiently filling at the shape of the cross section in practical rolling. Blank design principle offings was analyzed based on the typical ring with outer-stepped-section. A new different-feeding-speed method was provided. That was the different feeding speeds between the smaller ring part and the larger ring part to ensure no axial material flow while ring rolling to guarantee good forming of the outer-stepped-section. The material flow of four ring blanks （a rectangle section blank and two step-section blanks with the ordinary feeding method, and a step-section blank with the different-feeding-speed method） was simulated by using Abaqus software. The results show that the blank design method and the new different-feeding-speed method are reasonable. The cross section profile and diameter of the outer-stepped-section ring meet the requirements after rolling.