一、问题的提出我厂生产的 YL-400型液力联轴器之零件,连接套如图1,材料为 HT 25～47,重量17kg 属地坑造型。过去按“顺序凝固”原则设计,造成毛坯废品率达35～40%,最高达60～70%,加工后报废率低则20～25%,高则45%左右,我们根据“均衡凝固理论和有限补缩”原则,设计了浇口通过冒口充填补缩铸件的飞边冒口——热侧暗胃口。经五批生产铸件,成品率达95～99%,加工后报废率降为3～4%,其中最好的一批毛坯56个成品率为100%,零件成品率为98%,实践证明飞边冒口补缩能力强,挡渣、除气效果好,胃口易清除。 First, the question put forward I plant YL-400-type hydraulic coupling parts, connecting sleeve shown in Figure 1, the material is HT 25 ~ 47, weight 17kg pit shape. The past, according to the “solidification of the order” principle design, resulting in 35 ~ 40% rough scrap, up to 60 ~ 70%, processing scrap rate is low 20 ~ 25%, high about 45%, according to “ Limited reluctant ”principle, the design of the gate through the riser filling shrinking castings riser - hot side dark appetite. After five batches of castings, the finished product rate of 95 ~ 99%, processing scrap reduced to 3 to 4%, of which the best batch of 56 blank yield of 100%, the finished part rate of 98%, proved that the fly While riser recuperation ability, slag, good gas effect, appetite easy to remove.