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对于铸铁零件其内孔精加工后又在其径向方向加工顶丝孔如图1所示,在加工顶丝孔的底孔及攻丝时其内孔都将出现较大的毛刺,其高度一般为0.10～0.85mm,这样在装配工序中将出现两种情况:其一,将划伤与孔相配的旋转轴,其二,因毛刺较大旋转轴无法装配。因此必须清除毛刺而且不能影响精加工后的内孔尺寸精度及表面光洁度,在此前提下清理内孔毛刺最简单、可靠的方法是采用美国专利US8,871,189所提供的孔加工工具——磨料珩磨
For the cast iron parts of the hole after its finishing in the radial direction of the top wire hole as shown in Figure 1, the processing of top wire hole hole and tapping the inner hole will have a larger burr, the height Generally 0.10 ~ 0.85mm, so that there will be two cases in the assembly process: First, the scratch will match the axis of rotation of the hole, and second, due to burrs larger shaft can not be assembled. Therefore, it is necessary to clear the burr and can not affect the precision of the bore after finishing precision and surface finish. Under this circumstance, the easiest and reliable method to clean the burr in the inner hole is to use the hole processing tool provided by US Patent No. 8,871,189 - abrasive honing