The invention discloses a
casting method for a high-compactness air-cooled
diesel engine cylinder cover. The
casting method comprises the steps that 1, RR350 aluminum
alloy is smelted into liquid, and after
slag and gas are removed, an aluminum
alloy solution is obtained; 2, an aluminum
alloy solution is poured into the preheated
metal mold; 3, a collaborative vibration rod is connected with the free end of an ultrasonic amplitude-change pole of the ultrasonic energy gathering device, and then the collaborative vibration rod penetrates through an oil spraying hole of the
metal mold to be inserted into the
metal mold, so that the aluminum alloy solution in the
metal mold is driven by the ultrasonic amplitude-change pole and the collaborative vibration rod to vibrate till the aluminum alloy solution is completely solidified; fine and uniform
crystal grains are formed when the aluminum alloy solution is solidified and crystallized; according to the multi-field auxiliary cylinder cover
casting forming technology, solidification feeding on the casting thin-wall
mold filling difficult position in the
ultrasonic vibration mode is achieved, the ultrasonic field and gravity field coupled multi-field auxiliary cylinder cover casting forming technology is formed, feeding is promoted, the pinhole degree is reduced, grains are refined, and the yield and performance of castings are improved.