摘要
为降低转向节锻件的折叠缺陷和成形载荷,实现金属的合理分配,以复杂等级为S级的汽车转向节为研究对象,采用自由锻制坯(镦粗—杆部拔长—压扁)—预锻—终锻的成形工艺方案,利用Deform-3D软件对成形过程开展数值模拟,并通过实验验证,研究成形过程中的金属流动规律、等效应力等效应变分布以及载荷变化规律。结果表明:镦粗上模中部设计为圆弧形对金属起到了良好的分配作用,减少了预锻头部飞边以及折叠的缺陷。镦粗上模的圆弧半径为150 mm时,鼓形表面的损伤峰值最小。采用圆弧形镦粗上模和自由锻制坯—预锻—终锻的锻造成形方法,模拟获取的锻件无明显的成形缺陷,为转向节锻件的实际生产提供了理论指导。
In order to reduce the fold defect and forming load of steering knuckle forgings and realize the reasonable distribution of metal,for the automobile steering knuckle with complex grade of S-class,the forming process scheme of free forging billet(upsetting-rod flattening),pre-forging and final forging were adopted,and the forming process was simulated numerically by software Deform-3 D.Then,the metal flow laws,the distributions of equivalent stress and equivalent strain,and the load change laws during the forming process were studied by experimental verification.The results show that the designed circular arc shape in the middle of upsetting upper die plays a good role in metal distribution,and the defects of flash and folding for the pre-forged head are reduced.When the arc radius of upsetting upper die is 150 mm,the damage peak value of drum surface is the smallest.Using the forging method of circular arc upsetting upper die and free forging billet-pre-forging-final forging,the forgings obtained by the simulation have no obvious forming defects,which provides theoretical guidance for the actual production of steering knuckle forgings.
作者
曹洪
薛世博
薛传妹
石文超
宋中江
尹夕兵
Cao Hong;Xue Shibo;Xue Chuanmei;Shi Wenchao;Song Zhongjiang;Yin Xibing(Institute of Industry Equipment and Technology,Hefei University of Technology,Hefei 230009,China;Hefei Midea Washing Machine Co.,Ltd.,Hefei 230088,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Xingrui Gear Transmission Co.,Ltd.,Liu′an 237000,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2022年第9期7-11,共5页
Forging & Stamping Technology
基金
安徽省重点研究和开发计划项目(201904a05020075)
中央高校基本科研业务费专项资金资助(JZ2020HGTB0039)。
关键词
转向节
体积分配
圆弧形镦粗上模
自由锻制坯
预锻
终锻
steering knuckle
volume distribution
circular arc upsetting upper die
free forging billet
pre-forging
final forging
作者简介
曹洪(1995-),男,硕士,E-mail:1049334549@qq.com;通信作者:石文超(1988-),男,博士,副研究员,E-mail:shiwenchaohfut@hfut.edu.cn。
