摘要
将传统冲压工艺与电磁高能率成形工艺结合,提出一种多向电磁力作用下筒形件渐进复合拉深的成形工艺。通过对该工艺进行数值模拟,发现线圈放电产生磁场的磁力线集中于板料法兰区边缘以及凹模圆角位置,并在这些区域内产生感应电流,该感应电流与线圈中电流相互作用,使得板料法兰区边缘以及凹模圆角处受到均匀的电磁力作用,最终在凹模圆角处产生反胀成形。实验结果表明相比较于传统冲压,板料在一定预拉深高度条件下,线圈放电一次后,板料的拉深高度达到22.8 mm,提高了18.1%;经过4次放电,板料拉深高度达到28 mm,提高了45.1%,说明该工艺能有效提高板料的拉深高度。
Combining the traditional stamping and electromagnetic forming, a new forming method named cylindrical cup incremental composite deep drawing under multidirection magnetic pressure was proposed. The numerical simulation results show that after the dischar- ging of the coil, magnetic field lines around the blank concentrate on flange area and die corner area, and simultaneously induces a current in these areas. For the interaction between the induced current and the current in the coil, electromagnetic force is distributed uniformly in flange area and die corner area on the blank, and the bulge forming in die radius region is found. Comparing with the traditional stamping, when the blank has a certain degree of preform height, and the coil discharging for one time, the drawing height increases by 18. 1% to 22. 8 mm, while the drawing height increases by 45.1% to 28 mm if the coil discharging for four times. The results show that the forming method can improve the deep drawing height efficiently.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2017年第1期120-124,共5页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51405173
51175201)
国家973项目(2011CB012802)
关键词
复合拉深
电磁脉冲成形
渐进成形
有限元仿真
composite deep drawing
electromagnetic pulse forming
incremental forming
finite element simulation
