Machining tool for sealing opening of hydraulic valve sleeve

The utility model relates to the technical field of machining cutters, and discloses a hydraulic valve sleeve sealing opening machining cutter which comprises a connecting cutter handle and a drilling cutter head portion which are integrated, the drilling cutter head portion is composed of a cylindrical column cutting portion of the upper half portion and a conical cone cutting portion of the lower half portion, and a cutting angle is carved at the bottom end of the cone cutting portion. The cone cutting part is matched with a hydraulic valve sleeve sealing opening, spiral chip grooves are formed in the outer surface of the drilling tool bit part, cooling liquid outlets which are arranged at equal intervals are formed in the positions, corresponding to the chip grooves in each layer, of the drilling tool bit part, and cooling liquid conveying channels communicated with the cooling liquid outlets in the drilling tool bit part are formed in the connecting tool handle and the drilling tool bit part. The heat dis