球墨铸铁的冒口设计

• 作 者: 曹晨光 季强
• 机 构: 上海锅炉厂,
• 出 处: 上海机械
• 发表日期: 1963年12期
• 关键词: 冒口 湿型铸造 缩松 铸件质量 轴器 底注法 金属液 顺序凝固 精孔 手工造型

我厂生产球墨铸铁的铸件以承压阀门为主,其次为齿轮、联轴器等中小型铸件,绝大部分采用湿型铸造。生产虽已多年,但长期以来存在着缩孔和缩松缺陷,使铸件质量不够稳定。通过多年来的摸索,发现要解决上述缺陷,对如何设置合理的浇冒口,尤其是冒口的设计与计算,极为重要。经过改进后,目前已基本上使上述缺陷消灭,工艺成品率一般在70%左右。现简介如下。

I plant the production of ductile iron casting to pressure-based valves, followed by gears, couplings and other small and medium-sized castings, the vast majority of wet casting. Although the production has been for many years, but there is shrinkage and shrinkage defects for a long time, the quality of the casting is not stable enough. Through years of exploration, I found that to solve the above shortcomings, it is very important to set up a reasonable design and calculation of riser, especially riser. After the improvement, the above defects have basically been eliminated, the process yield is generally around 70%. Now the introduction is as follows.