在机械加工中,一般把长度和直径之比 ι/D 5的孔称为深孔。我厂在生产y92-315轮轴压装液压机时,其中有一材料为45 号钢的副油缸内孔就属于这一类,其长度是1023毫米,内径是φ100A(图1)。由于深孔的加工要比一般孔的加工困难,操作上也复杂得多,我们过去采用一般孔加工的工艺方法 In machining, the hole of length / diameter ratio I / D5 is generally called a deep hole. I plant in the production of y92-315 axle hydraulic press, which has a material for 45 steel sub-cylinder bore belongs to this category, its length is 1023 mm, diameter is φ100A (Figure 1). Due to the processing of deep holes than the average hole processing difficulties, the operation is also much more complex, we used the general hole processing technology