摘要
对淬火2A12-T4铝合金T形型材进行电磁校形试验研究。结果表明:通过电磁校形能实现给定T形型材的可控校形,工艺效率高。对于带整体翘曲型缺陷的型材,根据弯曲变形规律打击局部区域可获得校形效果;对于带缘板局部波浪形缺陷的型材,顺序打击局部缺陷处可实现校形;对于整体翘曲与缘板局部波浪缺陷并存的型材,先校形缘板局部波浪缺陷,再校形整体翘曲可达到形状精度要求。在相同压下量下,与长时加载的压力机校形相比,电磁校形时T形型材的切向应力分布梯度更大,导致沿长度方向上产生了更大的塑性变形,加载与变形瞬时完成,校形效率高。
Experimental study on electromagnetic shape correction of quenched 2 A12-T4 aluminum alloy with T-profile was carried out.The results show that the controllable shape correction of a given T-profile can be achieved by electromagnetic shape correction,and the process efficiency is high. For profiles with overall warping defects,the shape correction can be achieved by striking the local area according to the bending deformation law;for profiles with local wavy defects of flange,the shape correction can be achieved by striking the position of local defects sequentially;for the profiles with both defects,it can be firstly corrected for local wavy defects of flange and then corrected for overall warpage to meet the shape accuracy requirements. Under the same reduction,compared with the long-time loading press shape correction,the tangential stress distribution gradient of T-profile in electromagnetic shape correction is larger,and it results in a greater plastic deformation along the length direction. The loading and deformation are completed instantaneously and the correction efficiency is high.
作者
何逸汉
于海平
邓将华
张文忠
祝世强
HE Yi-han;YU Hai-ping;DENG Jiang-hua;ZHANG Wen-zhong;ZHU Shi-qiang(School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China;Capital Aerospace Machinery Co.,Ltd.,Beijing 100076,Chin)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第7期86-93,共8页
Journal of Plasticity Engineering
基金
国家自然科学基金面上项目(51675128,51774097)。
关键词
电磁校形
压力机校形
T形型材
2A12-T4铝合金
整体翘曲
缘板局部波浪缺陷
electromagnetic shape correction
press shape correction
T-profile
2A12-T4 aluminum alloy
overall warpage
local wavy defects of flange
