YZR 315电动机前端盖铸件的端孔,孔径应为240mm,由操作失误加工成241mm,按常规这批端盖应全部报废。我们试用热嵌钢套的办法挽救了这批铸件,见图1。具体做法是把端盖孔扩到φ250_+(0.030)~(+0.040)mm,再用A3钢加工出钢套,其尺寸要求见图2。将端盖整体加热到150℃,保温1h。然后将室温的钢套嵌入到热的端盖的轴孔中,并让其自然冷却。 YZR 315 motor front end of the castings of the hole, the aperture should be 240mm, processed into 241mm by mistake, according to conventional these end caps should be completely scrapped. We tried to save the castings by hot-embedding steel sleeves, see Figure 1. The specific approach is to expand the end cover hole φ250 _ + (0.030) ~ (+0.040) mm, and then A3 steel processing steel sleeve, the size requirements shown in Figure 2. The whole end cap heated to 150 ℃, heat 1h. Then insert the room temperature steel sleeve into the shaft bore of the hot end cap and allow it to cool naturally.