在孔加工中,有时会出现将孔径加工大或偏心等缺陷。采用镶套法消除这类缺陷,经过多次试验是成功的。我厂加工的YZR315电动机端盖零件重103kg,材质为HT200。在加工其轴孔时,将应加工到Φ240的轴孔误加工到Φ241。用镶套法补救这些零件,即先制作一个钢质镶套环,其外径略大于端盖的轴孔径,然后将端盖加热到一定温度并保温,利用热胀冷缩原理,将冷嵌套环嵌入已胀大的端盖孔径 In the hole machining, sometimes there will be large aperture processing or eccentric defects. The use of set method to eliminate such defects, after many tests is successful. I plant processing YZR315 motor cover parts weighing 103kg, made of HT200. In the processing of its axis hole, it should be processed to Φ240 axis hole error processing to Φ241. The set method to remedy these parts, namely the first production of a steel ring set, the outer diameter slightly larger than the end cap shaft aperture, and then the end cap heated to a certain temperature and insulation, the use of thermal expansion and contraction principle, the cold embedded The collar is fitted into the swollen end cap aperture