铸件浇铸之后便要收缩;但各种金属的收缩率不一样,需要加工的条件也各不相同,有的不必机械加工便可应用,有的需要满车满旋,因此铸件加工放尺的标准便须要很好地研究了。过去我厂没有标准,因此在加工前后便会发生内径过大、眼子不对、心子偏了等等的弊病,造成废品,直接影响了生产任务的完成。 After the casting castings have to shrink; but various metal shrinkage is not the same, the conditions need to be processed are also different, and some do not have mechanical processing can be applied, and some need full car full rotation, so the scale of the cast processing scale It needs to be well studied. In the past, I did not have a standard factory, so before and after processing there will be too large diameter, wrong eyes, the heart is partial and so the ills, resulting in waste, a direct impact on the completion of production tasks.