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本钻模用于钻削为柴油机配套的喷油咀总成部件中的精密针阀偶件——针阀体的进油孔。如图1所示为针阀体进油孔剖视图。ф2为进油孔直径,其中心线与本工件轴线的夹角为2°33′。使钻削出来的进油孔中心线与工件轴线的夹角恰好等于2°33′的方法是:将底座预先切去一块2°33′斜块(如图2),其次,让钻套孔的中心线、钻模板孔的中心线分别与钻套的轴线和钻模板垂直中心线的夹角都等于2°33′。操作顺序如下:(1)由图2的 C 向视图可知:工件上有一个中孔、二个定位孔,因此,在钻模板上安装了三种不同直径、
This drilling die is used for drilling the precision needle valve coupling part in the injection nozzle assembly of the diesel engine - the oil inlet hole of the needle body. Shown in Figure 1 is a needle valve body into the hole cross-sectional view. ф2 into the hole diameter, the center line of the workpiece axis angle of 2 ° 33 ’. The way to make the angle between the centerline of the oil hole and the axis of the workpiece exactly equal to 2 ° 33 ’is to pre-cut the base with a 2 ° 33’ oblique block (as shown in Figure 2) Of the center line, the center line of the hole drilling template hole and drill sleeve axis and the vertical center line of the template equal to 2 ° 33 ’. The operation sequence is as follows: (1) It can be seen from the view C of FIG. 2 that the workpiece has a central hole and two positioning holes. Therefore, three different diameters are installed on the drilling template,