锻压技术

环件轧制过程鼓形毛坯变化规律及塌边缺陷分析

英文标题：Study on deformation law of drum-shaped blank and collapse defect in rolling process

作者：贺佳阳王雷刚黄瑶孔德智

单位：江苏大学

关键词：环件轧制鼓形毛坯塌边

分类号：TG379

出版年,卷(期):页码：2014,39(3):47-51

摘要：

基于有限元模拟软件Simufact.Forming，建立径、轴向轧制模型,针对某一环件产品，通过对不同鼓出量的鼓形毛坯进行数值模拟，揭示鼓形毛坯在轧制过程的变化规律，分析了塌边缺陷的形成过程及消除措施。结果表明：轧制初期鼓形消失速度远大于轧制后期，鼓形越到后期越难消除，最终导致环件塌边缺陷。环坯鼓形鼓出量≥120 mm时,最终环件会产生塌边缺陷；环坯鼓形鼓出量≤90 mm时,最终环件不会产生塌边缺陷。为了避免塌边缺陷，当鼓形较小时，采用轧制初期大的径向进给量，当鼓形较大时，必须增加一道滚圆工序。

Based on the FEM software Simufact.Forming, a finite element model of radial-axial rolling for one ring product was constructed and the rolling process of different drum-shaped blanks were simulated, which revealed the variation of drum-shaped blank in the rolling process and analyzed the formation process and eliminating measures of collapse defect. The results show that the drum disappearing rate in initial rolling stage is greater than the one in later stage and more difficult to disappear, which leads to collapse defect in the end. When the drum-shaped ring blank is equal or greater than 120 mm, the drum-shape will lead to collapse defect finally; while the drum-shaped ring blank is equal or less than 90 mm, the drum-shape will not lead to collapse defect finally. Aiming at the collapse defect being avoided, the drum-shape can be reduced by adopting greater radial feed in initial rolling stage in the case of small drum-shape or adding one rolling process in the case of large drum-shape.

基金项目：

江苏省企业研究生工作站资助项目

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