灰铁轴承盖生产过程中铸造缺陷突出,一度废品率高达30%,主要为砂眼和气孔废品。通过在内浇道根部增加R2圆角,减少内浇道处的冲砂;在模样根部增加R2圆角,解决起模带砂及砂型松软问题;在模样周边贴0.5 mm防压边,解决挤砂问题;在模样上增加出气销,防止气孔缺陷。采用这些工艺措施后,轴承盖的砂眼和气孔废品得到有效控制,废品率由30%降低到3%左右。 Gray iron bearing cap casting defects prominent in the production process, once the rejection rate as high as 30%, mainly for trachoma and stomatal waste. Reduce the runner at the runner by increasing the R2 fillet at the root of the inner runner. Add R2 fillet at the root of the pattern to solve the problem of loose sand of the belt and sand mold. Sand problem; increase the appearance of the outlet pin to prevent stomatal defects. After adopting these technical measures, the trachoma of the bearing cap and the blowhole of the blowhole are effectively controlled, the rejection rate is reduced from 30% to about 3%.