An electromagnetic low-pressure
mold filling method with variable flow rate of aluminum
alloy melt is applied in the field of
advanced manufacturing technology. The specific process is: three-
dimensional modeling of castings and process drawings; generation of three-dimensional STL data files; Calculate the
casting height (h), cross-sectional area (s) and perimeter (1) corresponding to the layer and the equivalent
diameter (d) corresponding to each height, and use the equivalent
diameter value at each place to calculate the average iso-flow
pipe The
diameter of the complex cross-section
mutation casting is converted into a simple
casting of the iso-flow tube type; the regular curve of the critical
inlet velocity value of the ingate corresponding to the ratio of the cavity area to the ingate area obtained by the numerical
simulation of the flat casting , to obtain the velocity value at the entrance of the casting; then use the actual liquid Bernoulli equation of fluid
mechanics to calculate the pressure at different interfaces, so as to determine the P-t curve of the variable flow filling process of the casting; according to the variable flow P-t curve, use electromagnetic force to control the
metal Hydraulic low pressure filling. The beneficial effect of the invention is that it can realize stable filling of the aluminum
alloy melt, and the phenomena of splashing and
air entrainment are not easy to occur during the filling process, thereby ensuring the quality of the casting.