A double section drill comprises a drill pipe (1) and matched with a drill connecting part (2), the connecting part (2) forming a cavity (21) and a hinge pin hole (22), the connecting part (2) of the outer side of the upper end of two slope deflection (forming 23), the drill pipe (1) at the end of forming a cutting head (11), the cutting head (11) extending to one side forming cutting boss (12), which is characterized in that the upper part of the drill pipe (1) is fixed with a cutting block (13). The cutting convex block (13) of the cutting radius is larger than the cutting head (11) of the cutting radius. The utility model has the advantages of expanding the drilled hole, from the bottom of the hole to hang height is the same, in the setting of drilling depth, all holes drilled depth are the same, the curtain wall plate and hanging connection in the same plane, the installation is very convenient.
【技术实现步骤摘要】
【技术保护点】
一种双切面钻头,包括一钻杆(1)和一与钻机相配合的连接部(2),所述连接部(2)成形有一空腔(21)和一铰接销孔(22),所述连接部(2)的上端外侧成形有两偏转斜面(23),所述钻杆(1)的底端成形有一切削头(11),所述切削头(11)向一侧延伸成形有一切削凸台(12),其特征在于:所述钻杆(1)的上部还固定有一切削凸块(13),所述切削凸块(13)的切削半径大于所述切削头(11)的切削半径。
【技术特征摘要】
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