车丝杆通常是车一刀后,摇回拖板,也就是要跑一次空行程,因而浪费许多时间,尤其是车长丝杆浪费的时间更多。现在介绍一种能够正反车削螺纹用的刀杆(如图1)。刀杆结构简单,制造容易,经我们实际使用证明:不但能够保证质量,而且能提高效率80％,适于成批生产使用。刀杆结构:图1中,1是刀杆,前面开有燕尾槽,它跟刀体2上的燕尾槽配合,并能在刀杆1的燕尾槽内上下移动。刀体 Screwdriver is usually a knife after the car, back to the trailer, that is, to run an empty trip, which wasted a lot of time, especially the car leader screw wasting more time. Now introduce a positive and negative turning thread used arbor (Figure 1). Arbor structure is simple, easy to manufacture, proven by our actual use: not only to ensure quality, but also to improve efficiency of 80%, suitable for mass production. Arbor structure: In Fig. 1, 1 is a cutter bar, a dovetail groove is formed on the front surface, which cooperates with the dovetail groove on the tool body 2 and can move up and down in the dovetail groove of the tool bar 1. Tool body