Iron shell punching jig

The utility model discloses an iron shell punching jig which comprises a rack, a rotating motor is fixed to the middle of the bottom face of a top plate of the rack, the top end of an output shaft of the rotating motor extends out of the top face of the top plate of the rack and is fixedly provided with a rotating plate, a connecting block is fixed to the rotating plate, and a connector on a bottom plate of an iron shell to be machined is clamped to the connecting block. Horizontal clamping frames are fixed to the positions, on the left side and the right side of the connecting block, of the top face of the top plate of the rack. A to-be-machined iron shell is clamped between the arc-shaped clamping blocks of the two horizontal clamping frames. A middle supporting frame is fixed to the rear portion of the top face of a top plate of the rack, and a pressing oil cylinder is fixed to the top face of an upper plate of the middle supporting frame. The clamping device can be installed at a punching device, can clam