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内孔壁上倾斜孔的加工比平面上钻直孔复杂得多,如加工图1所示环形槽圆盘零件内壁倾斜孔时,由于内孔2-φ4.5H11及2-φ2.5H12除有孔径尺寸公差及表面粗糙度等要求外,还有对孔的位置度、倾斜度、同轴度及孔深度等多项精度要求。由图可知,中心孔φ14H11、凸耳3h11与平面C即是该零件的设计基准,亦是加工时的工艺基准或测量基准。根据该零件设计要求与生产类型,可采用以下三种方法加工内壁倾斜孔。
The machining of the inclined hole in the inner wall is much more complex than drilling the straight hole in the plane. For example, when machining the inclined wall of the inner wall of the annular groove disc part as shown in FIG. 1, since the inner holes 2-φ4.5H11 and 2-φ2.5H12 Aperture size tolerance and surface roughness requirements, there are holes on the location of degrees, tilt, coaxiality and hole depth and many other precision requirements. As can be seen from the figure, the center hole φ14H11, lug 3h11 and plane C is the design basis of the part, is also the processing of the process of benchmarking or measurement. According to the part design requirements and production type, the following three methods can be used to process the inner wall inclined hole.