Abstract
Using the finite element simulation software Deform-3D , the forming characteristics of pressing, cupping and shell ironing of the thick-walled cannonball body semiproduct were analyzed, and the parameters of shell ironing was optimized. The results show that the load increases sharply at the end of the pressing, while the bottom corner of the billet and the boss are not well formed, which can be finished at the end of cupping; Due to friction, the metal closed to the end face of the punch dose not deform during the cupping process, but rigidly moves with the punch. This part without deformation of the billet is called deformation viscous zone. As the cylinder wall of the billet bears axial tensile stress during the shell ironing, deformation at the bottom and necking would occur easily undercondition of bad lubrication and large deformation. When die-entrance taper is 15º, the workpiece have homogeneous deformation, low axial tension stress and forming load. The forming load of shell ironing can be effectively reduced by good lubrication for die.
Published Version
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