| 摘要 |
The present invention relates to a drill bit for drilling provided with a polycrystalline diamond compact, and specifically to a drill bit for drilling provided with a polycrystalline diamond compact according to the present invention comprising: a plurality of polycrystalline diamond compacts forming a fixed extension part accommodating part as a set space along the direction of a central shaft; a bit body having a seating part on which at least a part of the polycrystalline diamond compacts are seated, a hole-shaped clamp accommodating part adjacent to the seating part, and a fixed member accommodating part extending from the seating part in a stepped fashion to the clamp accommodating part so as to be in open communication therewith; a fixed member comprising a fixed extension part accommodated in the fixed extension part accommodating part when the polycrystalline diamond compacts are seated in the seating part, and a pressing extension part extending at a right angle from the fixed extension part, and accommodated in the fixed extension part accommodating part, and having at least a part of the end part exposed in the interior of the clamp accommodating part; and a clamp inserted into the clamp accommodating part by a method akin to driving a screw, and having a pressing groove on the outer circumferential surface for accommodating at least a part of the end part of the pressing extension part. According to the present invention, by having a lever-lock type of a structure for fixing the polycrystalline diamond compacts, the present invention has the benefit of facilitating attaching and detaching the polycrystalline diamond compacts. |
