Machining device for lower-end notch and mounting hole of stand column and notch machining tool thereof

The utility model discloses a machining device for a lower end opening and a mounting hole of a stand column and an opening machining tool of the machining device, the machining device comprises an end milling machine and a machining center, the opening machining tool is installed on a cutter shaft of the end milling machine, and the opening machining tool comprises an upper disc-shaped saw bladeand a lower cylindrical saw blade; the upper disc-shaped saw blade and the lower cylindrical saw blade are coaxially arranged, the lower cylindrical saw blade is located below the upper disc-shaped saw blade and is in an inverted convex shape, the upper disc-shaped saw blade corresponds to a first notch in the lower end of the stand column, and the lower cylindrical saw blade corresponds to a second notch in the lower end of the stand column. According to the utility model, the processing procedure of two notches is changed into one procedure for processing. The combined working procedure andthe third working procedur