大断面收缩率楔横轧模具设计  

Mould design on wedge rolling of big cross-sectional area shrinkage

作　　者：邓子玉[1] 施伟森 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

出　　处：《锻压技术》2014年第10期118-121,共4页Forging & Stamping Technology

摘　　要：根据零件成形件特点,利用Deform-3D有限元模拟方法,对大断面收缩率的实心件模具进行优化设计。采用一模双件轧制方法,零件的大弧形在中间,先轧制尾部凹槽,再轧制中间大弧形,优点是成形过程稳定,便于在成形之后将其切断。通过分析楔形高度变化对其成形效果的影响可知,楔入后期楔高变化快,导致轧件后期变形量大,发生缩颈现象。从而得到较好的成形方案并对轴向横截面等效应变和等效应力分布规律进行了研究,分析结果表明,表面及附近的金属的等效应变和等效应力较大,轧件中心金属的等效应变和等效应力较小,并且在轴向方向轧件等效应力呈弧形分布。According to the part characteristics formed by wedge rolling, the mould of big cross-sectional shrinkage solid part was optimal- ly designed by Deform - 3D software. The rolling method of forming two pieces in one mould was adopted, The big arc of piece was in the middle, the tail groove was formed first, and then the big arc in the middle was formed. It is an advantage that the rolling process is stable, and it can be cut off easily after forming. After analyzing the influence of height changes on forming results, it is found that in the final stage of wedging the wedge height changes quickly which results in big deformation and necking. A better scheme was obtained and the distribution laws of equivalent stress and equivalent strain in axial cross-sectional area were researched. The research results show that the metal equivalent stress and equivalent strain on the rolled surface and nearby are bigger, but smaller in the center, and the equivalent stress in the axial direction is distributed in arc.

关 键 词：楔横轧 大断面收缩率 模具设计 

分 类 号：TG333[金属学及工艺—金属压力加工] TG335.19