Numerical simulation of flat bottom cylindrical cup by hydrodynamic deep drawing with independent radial hydraulic pressure

To satisfy the forming need of low plasticity materials and large height-diameter ratio cups, the hydrodynamic deep drawing (HDD) with independent radial hydraulic pressure technology was proposed. Numerical simulations of 5A06 aluminum alloy flat bottom cylindrical cup's HDD with independent radial hydraulic pressure were carried out by employing the dynamic explicit analytical software ETA/Dynaform5.5. The influence of different independent radial hydraulic pressure loading paths on the forming quality was analyzed by taking the wall-thickness distribution as standard. And that the flange area existed a stress dividing circularity in HDD with independent radial hydraulic pressure process was approved by numerical simulation. The results show that adopting reasonable liquid chamber pressure 40 MPa and independent radial hydraulic pressure 45 MPa can obtain good quality formed cups with drawing limitation is 3.1.