Rotatable magnetic drill press for tubular metal trepanning

The utility model relates to the technical field of machining, in particular to a rotatable magnetic seat drill for tubular metal trepanning, which can adjust the position of a drilling device as required under the condition that a magnetic seat is not moved, and is convenient to use, low in labor intensity, high in working efficiency, high in practicability and high in reliability. Comprising a magnetic base, a supporting shaft, a worm gear, a worm, a fixing plate, a connecting plate, a spring, a sliding plate, a rack, a gear, a rotating shaft, two sets of supporting plates, a lead screw, a sliding block and a drilling device, the supporting shaft is rotationally installed at the upper end of the magnetic base, a cavity is formed in the supporting shaft, the worm gear is fixedly installed on the outer side of the supporting shaft, the worm gear is meshed with the worm, and the worm is rotationally installed on the fixing plate; the fixing plate is fixedly installed at the upper end of the magnetic seat, the