盲孔螺纹的车削难度是比较大的。我们原来在C616车床上车削如图1所示45钢的螺纹时,由于退刀槽窄,不能高速切削,只能每分钟几十转,即使是这样,精神还是十分紧张,而且工效低,质量不稳定。后来,我们将挑扣刀制作成如图2所示的反向形状,进行如图3所示的反向走刀车削,实现了每分钟1980转的高速车盲孔螺纹。挑扣时,使工件反转,刀具先在退刀槽内吃好切削深度,按下闸瓦后,刀具向尾座方向前进,走刀 Blind hole thread turning is more difficult. We turned on the C616 lathe as shown in Figure 1, 45 steel thread, due to recess retraction, can not be high-speed cutting, only tens of revolutions per minute, even so, the spirit is still very tight, and low efficiency, quality Unstable Later, we made the pick-up knife into the reverse shape as shown in Fig. 2, turning the knife in the opposite direction as shown in Fig. 3 to realize the blind hole screw of 1980 speeding car. When the buckle is buckled, the workpiece is reversed, and the cutting tool first ate the depth of cut in the undercut groove. After the brake shoe is pressed, the tool advances toward the tailstock and the knife