The utility model belongs to the
deep hole drilling technical field especially, it is a kind of
deep hole drill for
machining middle axle of automobile reduction gearbox, to the existing in use, since the heat generated by
drill head and hole wall friction, it is inconvenient to carry out heat dissipation, leading to
drill head overheating influence
processing quality problem, present and propose following scheme, including drill fixed
handle, the one end of drill fixed
handle is connected with drill head body, the other end of drill fixed
handle is connected with water inlet
pipe, the inside of drill fixed handle is equipped with cooling mechanism for cooling drill head, the one side of cooling mechanism is equipped with quick release mechanism for the disassembly of drill head. The utility model is sprayed by the water injection hole of drill head body terminal, drill head body is in hole, so that the water that sprays will pass through the
chip flute on drill head body and be discharged from inside to outside, to further cool drill head body, and can flush out the
impurity adhered to the outer surface of drill head body.