切制高精度内螺纹的丝锥,愈来愈多地在生产中得到应用,它具有切削刃和修光刃,或者切削刃和压光刃(图1),用一次走刀就可获得所需尺寸和廓形,此外由于被加工表面受到塑性变形,因此有着切削刃和压光刃的丝维提高了螺纹的质量。 More and more applications are being made in the production of precision-machined taps. They have cutting edges and wedges, or cutting edges and calendering edges (Fig. 1). With a single pass, you get what you need Size and profile, in addition to the machined surface being plastically deformed, the presence of a cutting edge and a press-edged wire increases the quality of the thread.