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中空轴(进、出料端盖)是磨机里主要零件之一,也是我厂常年生产的一种铸件,平均年产400~450件左右。中空轴轴颈部份加工后要求达到?7,所以对铸造毛坯的质量提出了较高的要求。 1972年以前,中空轴一直是采用冒口下外增肉(工艺补整量),底注、干模造型的传统工艺生产的,结果,在很长一段时间内在轴颈处存在着严重的内部缺陷,小米粒大小的黑灰
The hollow shaft (inlet and outlet end caps) is one of the main parts in the mill. It is also a casting produced perennially by our factory with an average annual output of about 400 ~ 450 pieces. Hollow shaft journal part of the processing requirements? 7, so the quality of casting rough put forward higher requirements. Prior to 1972, the hollow shaft had been produced using a conventional process that used risers to cut meat (make-up), bets, and dry-mold shapes. As a result, there was a serious internal presence at the journal for a long period of time Defects, the size of the small black ash