板材累积变形工艺  

Cumulative deformation process for plate

作　　者：潘立栋 郭永强 李硕[2] Pan Lidong;Guo Yongqiang;Li shuo(China Machinery Fine Blanking Technology(FuJian)Co.,Ltd.Yangzhou Branch,Yangzhou 225000,China;Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.CAM,Beijing 100083,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中国机械总院集团北京机电研究所有限公司中机精冲科技(福建)有限公司扬州分公司,江苏扬州225000 [2]中国机械总院集团北京机电研究所有限公司,北京100083 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《锻压技术》2023年第12期105-110,共6页Forging & Stamping Technology

摘　　要：针对板材带特征筋一体化成形展开研究,提出了板材累积变形工艺,其原理是在正向挤压凸模运动下,引入反相挤压凸模,通过对变形区的控制达到对材料的累积变形进而实现工件的整体成形。通过有限元模拟,分析了累积变形过程,发现变形区高度在超过10.8 mm后一定会出现失稳凹陷;当反向挤压凸模与正向挤压凸模的速度比为3/5时累积变形效果良好。基于正交实验的研究结果,归纳了挤压速度、材料温度、模具圆角以及摩擦因数对控制变形区高度的影响规律及显著性,得出在短行程凸模运行过程中,对于该工艺影响最大的因素为材料的加热温度。最后,通过实验验证了该工艺模型的准确性。板材累积变形工艺的开发对于板材成形特征筋等功能集成的工件一体化成形具有指导意义。The integrated forming of plates with characteristic ribs was researched,and a cumulative deformation process for plates was proposed.Then,the principle was to introduce a reverse extrusion punch under the movement of the forward extrusion punch and achieve the overall forming of workpiece by controlling the deformation zone to achieve cumulative deformation of material.Then,through finite element simulation,the cumulative deformation process was analyzed,it was found that the instability depression definitely appeared after the height of the deformation zone exceeded 10.8 mm,and when the speed ratio of the reverse extrusion punch to the forward extrusion punch was 3/5,the cumulative deformation effect was good.Based on the research results of orthogonal experiments,the influence rules and significance of extrusion speed,material temperature,mold fillet and friction factor on the height of the controlled deformation zone were summarized,and it was concluded that during the operation process of the short-stroke punch,the factor that had the greatest impact on this process was the heating temperature of material.Finally,the process model was experimentally verified,and the development of the cumulative deformation process for plate has guiding significance for the integrated forming of workpieces with integrated functions such as plate forming characteristic ribs.

关 键 词：累积变形工艺 稳定变形区 板材成形 挤压成形 一体化成形 

分 类 号：TG376[金属学及工艺—金属压力加工]