摘要
轧制差厚板由于板料厚度、力学性能的不均匀,在成形过程中容易发生起皱缺陷。综合采用数值模拟和冲压实验2种手段对差厚板方盒形件拉深成形起皱缺陷进行研究。讨论了差厚板方盒形件起皱缺陷的发生机理,并以厚度应变为评价指标,分析了板料尺寸、过渡区长度、过渡区位置、板料厚度等板料几何参数对差厚板起皱缺陷的影响,最后给出了抑制起皱缺陷的措施。研究表明：差厚板方盒形件最容易发生起皱的部位是薄板侧和厚板侧的法兰区以及过渡区法兰部分。板料尺寸越小,过渡区长度越短,则差厚板越不容易发生起皱,采用较大或者较小的板厚差均能够抑制起皱现象的出现,而过渡区中心位置偏离板料中心则可能导致差厚板起皱现象的发生。
Tailor rolled blank（ TRB） is inclined to wrinkle during the forming process because of the nonuniformity of blank thicknesses and mechanical properties. The wrinkle defect of TRB square box in deep drawing was studied by numerical simulation and stamping experiment. The mechanism for the wrinkle defect of TRB square box was discussed,and effects of blank size,thickness transition zone length and position,and blank thickness on the wrinkle defect of TRB were analyzed by taking thickness strain as an evaluating indicator. Finally,the measures restricting the wrinkle defects were presented. The results indicate that the spots inclined to wrinkle for TRB square box are the flange on the thinner side,the flange on the thicker side,and the flange in the thickness transition zone. The smaller the blank size and the thickness transition zone length are,the harder TRB is to wrinkle. Greater or smaller thickness difference can both restrain the wrinkle phenomenon,and thickness transition zone center offset from the blank center may lead to the occurrence of wrinkle.
作者
张华伟
官英平
刘相华
吴佳璐
ZHANG Hua-wei1,2,GUAN Ying-ping2,LIU Xiang-hua3,WU Jia-lu1(1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, Liaoning, China; 2. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China; 3. Research Institute of Science and Technology, Northeastern University, Shenyang 110819, Liaoning, Chin)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2018年第1期48-53,共6页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(51475086)
河北省自然科学基金资助项目(E2016501118,E2015501073)
中国博士后科学基金资助项目(2016M591404)
河北省高等学校科学技术研究重点资助项目(ZD2017315)
关键词
轧制差厚板
方盒形件
起皱缺陷
板料尺寸
板料厚度
厚度过渡区
tailor rolled blank
square box
wrinkle defect
blank size
blank thickness
thickness transition zone
