学术论文

      基于DEFORM的索具接头内孔反挤压成形数值模拟

      Numerical simulation for inverse extrusion forming of the hole of a rigging joint based on DEFORM

      摘要:
      为研究索具接头内孔挤压成形的可行性,采用有限元方法对索具接头内孔热挤压成形工艺进行了数值模拟分析.从金属流动规律及金属的流线分布两方面分析了索具接头内孔的成形性,并研究了不同挤压条件下索具接头的应力场、应变场及成形件晶粒大小的关系.确定了热挤压工艺参数:初始挤压温度为1 100~1 150 ℃,挤压速度为10 mm/s.通过有限元分析研究得出,内孔成形挤压后金属流线分布合理,无明显交叉、断裂的情况,且成形效果较好,尺寸精度较高.因此,该索具接头内孔热反挤压成形工艺切实可行.
      Abstract:
      In order to study the feasibility of hot forging forming process for rigging joints, the numerical simulation of hot inverse extrusion forming technology of the hole of a rigging joint is analyzed with finite element method, and the formability of rigging joint hole is analyzed from both metal flow regularity and metal streamline distribution.The relationships of rigging joints under different extrusion conditions between stress field, strain field and change of grain size of the extrusion parts are studied.The extrusion technological parameters are obtained which are initial temperature of 1 100~1 150 ℃ and extrusion speed of 10 mm/s.Through finite element analysis, after forming of the hole under extrusion, the simulation results show that the distribution of metal flow line is reasonable, there is no obvious cross or fracture, the forming result is good, and the dimensional accuracy is high.So the hot inverse extrusion forming of the hole of the rigging joint is feasible.
      作者: 冀晓磊 [1] 韩鹏彪 [1] 鲁素玲 [1] 刘乐 [1] 马磊 [1] 王同会 [2] 陈玉玺 [2] 崔建英 [2]
      Author: JI Xiaolei [1] HAN Pengbiao [1] LU Suling [1] LIU Le [1] MA Lei [1] WANG Tonghui [2] CHEN Yuxi [2] CUI Jianying [2]
      作者单位: 河北科技大学材料科学与工程学院,河北石家庄,050018 巨力索具股份有限公司,河北保定,072550
      刊 名: 河北科技大学学报 ISTICPKU
      年,卷(期): 2017, 38(4)
      分类号: TG376.2
      在线出版日期: 2017年8月14日
      基金项目: 河北省科技计划项目