MAGNETIC POWDER FORMING SIMULATION SUBJECTED TO PRESSING IN MAGNETIC-FIELD

Magnetic field forming is a promising method to produce high quality f erromagnetic materials. In this process, magnetic powder is formed in the high magnetic flux by the metal injection molding process. However the parameter of this process is very complicated and it is still dif ficult to obtain the optimum forming conditions. The analytical method is very effective tool to make such optimum forming design and to inv estigate the mechanism of the magnetic powder flow under applied magne tic field and pressing. We developed the coupling method of pressing l oad with magnetic field to simulate the magnetic field forming. In thi s method, granular modeling is utilized to simulate the mechanical beh avior of the powder particles and the magnetic field is considered as a body force. In the numerical example, we analyzed the difference of the magnetic powder flow for pressing schedule and the preferred orien tation of magnetizing of the magnetic powder is taken into account in the particle modeling.