The processing method solves the problem of the depth control of the car axle head screwed hole, thereby improving the quality of the car axle processing.

本发明解决了车轴螺孔深度控制问 题，从而提高了车轴加工的质量。

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The utility model provides a screw and a screw driver matching with it. The screw comprises a slotted screw head and a screwed screw bolt, and a positioning hole is arranged at the center of the slot.

本实用新型提供了一种配合使用的螺丝和螺丝刀，所述的螺丝包括开有一字槽的螺丝头和有螺纹的螺杆，在所述的一字槽中央有一定位孔；

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After the fixing bolt is completely screwed in the central hole of the screw, the upper end-face of the fixing bolt is lower than the upper end-face of the fixing sleeve pipe.

固定螺钉完全旋入螺杆中心孔后，固定螺钉的上端面低于固定套管的上端面。

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