Diamond screw

Abstract

The invention discloses a self drilling screw. The self drilling screw is characterized in that a locating groove is at least formed in a drilling tail portion of the screw, a drilling edge is formed at the connecting position of the locating groove and a drilling tail, and the locating groove is communicated with a chip discharge groove in the drilling tail portion. Therefore, by the help of the design of the locating groove, the self drilling screw can be supported by multiple points when in contacted with a locked object, the locating function of the drilling tail portion stably located on the locked object is enhanced, meanwhile, the drilling edge is matched with two drilling blades of the drilling tail portion for auxiliary drilling, applied force and time can be reduced, the sharpness effect and the drilling speed of the drilling blades can be improved, and then the aim of fast drilling and locking can be achieved.

Description

technical field [0001] The invention relates to a design of a screw drill tail, in particular to a drill tail screw. Background technique [0002] refer to figure 1 The existing drilling screw 1 includes a screw head 11, a rod body 12 which is arranged on the screw head 11 and extends outwards, a drill tail part 13 which is opposite to the screw head 11 and is arranged at the other end of the rod body 12, and a A plurality of spiral rings are arranged on the thread 14 on the rod body 12; wherein, the drill tail portion 13 has a drill body 131 extending outward from the rod body 12, and a drill body 131 extending outward from the drill body 131 and being inclined. Tail 132, at least one chip removal flute 133 opened on the drill body 131 and the drill tail 132, and a positioning end 134 located at the edge of the drill tail 132, and the chip removal flute 133 is connected to the drill body 131 A cutting edge 135 is formed, and at the same time, two drill edges 136 are forme...

AI Technical Summary

Problems solved by technology

[0003] However, after use, it is found that when the existing drilling screw 1 is initially locked, the positioning end 134 forms a point of contact with the surface of the lock, and in view of the fact that the surface of the lock is smooth. , the friction force will be smaller, so when the drill screw 1 is driven by the fast rotating torque, it will cause the drill screw 1 to easily slip on the lock and produce an offset phenomenon, making the positioning The end 134 not only cannot effectively push against the lock, but also makes the positioning of the lock inaccurate and difficult, and also causes inconvenience in the lock operation, and at the same time causes damage to the lock during the lock process. The surface of the lock will be destroyed, and the appearance of the lock will be destroyed; moreover, after the positioning of the drill screw 1 is time-consuming and difficult to lock, only the two drill edges 136 cooperate with the drill body 131 to rotate and lock into the lock. When the lock is inside, not only is it quite laborious, but also it is easy to passivate the drill edge 136 during the locking process, which will affect the subsequent locking speed, which needs to be improved.

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