攻丝要使丝锥轴线垂直于工件的表面,是不太容易的,而攻丝质量好坏,对工件装配很有影响,有时往往因为丝牙歪斜,使螺栓无法旋入,只得修锉与其相联接的零件孔。我们采取的办法是把要联接的工件按装配要求暂时一起固定,按图纸要求的螺纹攻丝直径一同钻孔,再用螺纹外径大小的钻头把非攻丝工件孔扩大,注意不要把攻丝工件孔也扩大。接着再攻丝,非攻丝孔 Tapping the tap axis perpendicular to the surface of the workpiece is not easy, and the quality of the tapping is very influential on the assembly of the workpiece, sometimes because of the skew of the wire, the bolt can not be screwed in, only file and phase Join part hole. We take the approach is to join the workpiece according to the requirements of the assembly temporarily fixed together, according to the drawings required to tap the diameter of the tap with the drilling, and then the size of the thread outside the drill tap to expand the non-tapping workpiece hole, be careful not to tap Workpiece hole is also enlarged. Then tapping, non-tapping hole