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在汽车、拖拉机中双头螺栓用得较多。因此,在装配中要求所使用的螺栓装卸工具能够快速方便地进行作业。这类工具一般是通过套筒与动力部分连接。在小批试制或修理时可用手动摇把;在大批量生产中,则须用电动或风动扳手;在固定位置作业时,也可用摇臂钻床作动力。图1为一种简易的拧入螺栓工具。这类工具的缺点是螺栓在工具中的螺纹受力变形后,使螺纹与工具之间的摩擦阻力增大,当拧入螺栓后,工具反转退出时往往使已拧入的螺栓也随工
In cars, tractors, studs are used more. Therefore, it is required that the bolt handling tool used in the assembly be able to operate quickly and easily. Such tools are generally connected through the sleeve and the power section. In small batches of trial or repair can be hand crank; in high-volume production, you must use electric or pneumatic wrench; work in a fixed position, you can also use a radial drilling machine powered. Figure 1 shows a simple screw-in tool. The disadvantage of such tools is the bolt in the tool after the force deformation of the thread, the friction between the thread and the tool increases, when the screwed into the screw, the tool is often withdrawn to reverse the screw has been screwed with the workers