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本文介绍的夹头,其构造的特点为:当螺丝攻上的载荷突然增加时(攻不透穿的螺丝孔,螺丝攻与孔底部接触的时候;螺丝攻的切削刃钝化的时候;被加工材料的硬度不一致的时候;以及其他情况),夹头会自动停止,使螺丝攻不致破坏。夹头的构造如附图所示。它可以用来攻直径为3至16公厘的内螺纹。在夹头体1内嵌入一衬套2,用梢子3把它们联结在一起。两个梢子4被压入到衬套2里面。夹头体的上部嵌入尾柄5、锥形托盘6、滚珠7、及定位螺帽8;并用制动螺钉9将完位螺帽8与夹头体1连在一起。在定位螺帽8
This article describes the chuck, its structure is characterized by: a sudden increase in load on the screw attack (penetration of non-penetrating screw holes, screw holes and the bottom of the hole when the contact; screw tapping cutting edge passivation time; The hardness of processing materials inconsistent when; and other circumstances), the chuck will automatically stop, so that the screw attack will not cause damage. The structure of the chuck is shown in the attached drawing. It can be used to attack internal threads with a diameter of 3 to 16 mm. A bushing 2 is inserted into the chuck body 1, and the tips 3 are used to join them together. Two pins 4 are pressed into the bushing 2. The upper part of the chuck body is embedded with the tail handle 5, the tapered tray 6, the ball 7 and the locating nut 8; and the complete screw nut 8 and the chuck body 1 are connected together by the stopping screw 9. Locate nut 8