Pipe elbow arc automatic cutter

The utility model relates to a pipe elbow arc automatic cutter, comprising a base, a rotating shaft, a generator, a disk, a locating piece, a supporting bracket, a locating supporting frame, a cutting tool, a height regulating mechanism, and an arc spacing mechanism. The rotating shaft whose two sides are provided with guide grooves is arranged on the base and connected with the generator. The disk is sheathed on the rotating shaft. The locating piece is matched with the guide grooves on the rotating shaft. The supporting bracket is fixed on the base. The locating supporting frame is fixed on the supporting bracket. The cutting tool is fixed on the locating supporting frame. The height regulating mechanism comprises a drive shaft and a regulating wheel. The regulating wheel and the drive shaft are worm matched. The lower segment of the supporting bracket and a drive shaft are gear matched. The arc spacing mechanism comprises a guide screw, a spring, a regulating nut, a traveling block, and a regulating screw. One end of the guide screw is fixed on the locating supporting frame, and the other end of the guide screw is movably connected with the supporting bracket. An ascending pipe can be automatically cut into required arc pipe sections through that the disk angle is adjusted and small pipes to be cut are fixed independent on marking-off. After being assembled, the arc pipe sections can be welded into various required pipe elbows.