在工件斜面上钻孔,可用下列方法进行: (1)由于从斜面上直看圆孔是一个椭圆形孔,很难划线,所以在斜面上只需划一个长方形框线,见图2。 (2)校正工件斜面与钻床工作台面平行,用顶角为180°-2α的钻头钻一个沉孔,见图3。 (3)最后校正中心孔的位置,并使工件钻孔中心线和钻床工作台面垂直,即可钻孔。 Drilling holes in the workpiece bevel can be carried out by the following methods: (1) Since the round hole is an oval hole straight from the bevel, it is difficult to scribe it. Therefore, it is only necessary to draw a rectangular frame on the bevel, as shown in Figure 2. (2) Calibrate the workpiece bevel parallel to the table of the drilling machine. Drill a counterbore with a drill bit whose apex angle is 180 ° -2α, see Fig.3. (3) Finally, the location of the center hole correction, and the workpiece drilling centerline and drilling table vertical, you can drill.