| 摘要 |
A rock drill tool, which comprises a rock drill bit as well as a drill rod detachably connected with the rock drill bit, where the joint between the rock drill bit and the drill rod is effected by means of a conical connection. The rock drill bit has a generally conical cavity, and the drill rod has a generally conical portion. The conical cavity is provided with a crest-shaped projection, which has a rectilinear extension along the envelope surface of the conical cavity, that the conical portion has a groove, which has a generally rectilinear extension along the envelope surface of the conical portion, and that the crest-shaped projection is received in the groove. A rock drill bit and a production method are also disclosed. |
