我厂铸造许多规格不同的卷扬筒,但过去铸造出来,在机械加工之后往往发现很多铸造缺陷,使铸件大量报废,成为生产上的一大关键。为了解决卷扬筒的质量问题,曾请苏联专家到现场指导,提出改进办法,经过一年多的应用,没有发现任何废品。 I plant a lot of different specifications of the winch drum, but the past casting out, often found in the machining of many casting defects, a large number of castings scrapped, a major production key. In order to solve the quality problem of the winch drum, Soviet experts were invited to give guidance on the spot and put forward improvement measures. After more than a year of application, no waste products were found.