Method for automatically pouring molten metal by tilting a ladle and a medium for recording programs for controlling a tilt of a ladle

摘要

A method for controlling the respective input voltages transmitted to a servomotor that tilts the ladle such that the molten metal that flows from the ladle drops accurately into the pouring gate in the mold, a servomotor that moves the ladle back and forth, and a servomotor that moves the ladle up and down, by using a computer. In the method, a mathematical model of the area on which the molten metal that flows from the ladle will drop is produced, and then the inverse problem of the produced mathematical model is solved. In view of the effect of a contracted flow, the position on which molten metal drops is estimated by the estimating device for estimating the pouring rate and the estimating device for estimating the position on which molten metal will drop.

主权项

1. A method for automatically pouring molten metal by tilting a ladle for storing the molten metal in a tilting-type automatic pouring apparatus comprising three servomotors, one of which can tilt the ladle, one of which can move the ladle back and forth, and one of which can move the ladle up and down,
wherein respective input voltages transmitted to the three servomotors are controlled by means of a computer whereby molten metal that flows from the ladle is correctly dropped into a pouring gate in a mold when the molten metal is poured into the mold, wherein the method comprises: producing a mathematical model of an area on which the molten metal that flows from the ladle will drop, solving an inverse problem of the produced mathematical model in view of an effect of a contracted flow causing, under the effect of gravity, a reduction of a depth of an overflow of the molten metal at a guiding member of a tip of an outflow position on a flow rate of the molten metal when it flows out of the guiding member by means of an estimating device for estimating a flow rate of the poured molten metal and by means of an estimating device for estimating a position on which the molten metal will drop, to estimate a position on which the molten metal will drop, calculating the estimated position by means of a computer, to thereby obtain respective input voltages transmitted to the three servomotors, controlling the three servomotors based on the obtained input voltages, and measuring a position on which the molten metal that flows from the ladle is dropped by means of an imaging device installed at a side of the ladle.