Two screw locking crown drilling rods of Y shape inner -cooling

The utility model relates to a two screw locking crown drilling rods of Y shape inner -cooling, drilling rod contain work portion, neck and the stalk portion that uses same the central axis to link up mutually in proper order as the center, and work portion is equipped with spiral chip groove, and the entity part outside the chip groove is the back of a knife blade, the stalk portion is the cylinder form, the neck is the assembly of cone and cylinder constitution, the axis location of drilling rod is equipped with dan zhizhu cooling hole, is equipped with the two in the left end of work portion and divides the cooling hole, and the two divides cooling kongyudan directly to communicate with each other and constitute Y shape inner -cooling structure in main cooling hole, the terminal surface of drilling rod work portion is equipped with the V - constant head tank, and V - constant head tank both sides are equipped with and are used for joining in marriage soon the fastening screw of housing screw. The drilling rod adopts V -arrangement location structure, and the production precision easily guarantees, the manufacturing cost of reducible crown blade and drill bit cutter arbor.