摘要
针对两辊楔横轧等内径空心轴轧件易产生椭圆的问题,采用有限元数值模拟方法,研究了两辊楔横轧等内径空心轴的轧制成形过程及应力应变情况.结果表明成形过程中轧件的径向压缩和轴向流动不匹配,造成金属切向流动显著、圆周长大,这是椭圆形成的主要原因.
This article focuses on the ellipse problem in two-roll cross wedge rolling the hollow shafts with uniform inner diameter. Numerical simulation by a finite element method was performed to study the forming process and the stress-strain conditions of the hollow parts. It is found that the mismatching between radial compression and axial flow leads to easier tangential metal flow and growing up in the circumferential direction, which is the main cause for forming the ellipse. The study is useful to choose proper process parameters in two-roll cross wedge rolling the hollow parts.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第12期1426-1431,共6页
Journal of University of Science and Technology Beijing
关键词
楔横轧
空心轴
椭圆化
有限元法
计算机模拟
cross wedge rolling
hollow shafts
ellipse
finite element method
computer simulation
