我厂生产的轴套及蜗轮类铸件较多,蜗轮圈即为典型产品之一。该产品是船用启吊设备的关键零件,我们先后浇注了30余件,除少数因熔炼不当而报废外,大部分都获得了成功。现将该轮圈的铸造工艺简介如下。一、工艺分析 1.产品为非单件生产,以实样模型造型为宜。 2.该轮圈材质是ZQAL9-4,在浇注过程中易产生二次氧化,故采用底注。浇注系 I plant bushings and worm wheel castings more, the worm gear is one of the typical products. The product is a key part of the ship hoisting equipment, we have poured more than 30 pieces, with the exception of a few scrapped due to improper melting, most of them have been successful. Now the rim of the casting process is as follows. First, the process analysis 1. The product is not a single piece of production, with a real model is appropriate. 2. The rim material is ZQAL9-4, prone to secondary oxidation in the casting process, so the use of bets. Pouring system