大断面收缩率楔横轧模具设计

• 作 者: 邓子玉 施伟森
• 机 构: 沈阳理工大学材料科学与工程学院,
• 出 处: 锻压技术
• 发表日期: 2014年10期
• 关键词: 断面收缩率 等效应力 轧件 楔横轧 等效应变 大断面收缩率 模具设计 弧形 有限元模拟方法 楔横轧模具

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 characteristics of the parts forming parts, Deform-3D finite element simulation method is used to optimize the solid parts mold with large reduction of area. The use of a model double-piece rolling method, the part of the large arc in the middle, the first rolling tail groove, and then rolling the middle of a large arc, the advantage of the forming process is stable, easy to cut after forming. By analyzing the influence of the wedge height change on the forming effect, it is found that the wedge height changes rapidly during the late wedging, resulting in the large amount of deformation in the late stage of rolling and the necking phenomenon. The results show that the equivalent strain and equivalent stress of the metal in the vicinity of the surface and in the vicinity of the equivalent stress are larger, and the rolling center metal The equivalent strain and equivalent stress are smaller, and the equivalent stress of the rolling stock in the axial direction is arc-shaped.