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如果你用样板来打中心眼,那末这里有一个很好的工具可以帮助你工作。如图1,它的底座7,里面穿一只定心锥套6,借着弹簧5使它紧压在样板8上。锥套的里面还有一根螺旋弹簧3,靠螺旋塞2把它封住。当把冲头1的滚花端头提起时,弹簧3便被肖子4拉紧了。然后放松冲头1,由于弹簧3的作用使冲头1恢复原位,便在平板9上打出了一个中心孔。工作起来又快又好。冲头1的尖端必须经过磨砺,并且绝
If you use the template to hit the center, then there is a good tool to help you work. Figure 1, its base 7, which wearing a centering cone 6, it is pressed by the spring 5 on the template 8. Inside the taper sleeve also has a coil spring 3, which is sealed by the screw plug 2. When the knurled end of the punch 1 is lifted, the spring 3 is tightened by the shanks 4. Then, the punch 1 is released, and the punch 1 is returned to its original position by the action of the spring 3, so that a center hole is formed in the plate 9. Work fast and good. The tip of punch 1 must be honed and must not be polished