Numerical control ratchet cylinder hole shrinking machine

The invention discloses a numerical control ratchet cylinder hole shrinking machine. The machine comprises a frame; a cylinder shrinkage diameter change system and an automatic feeding system are mounted on the frame; a high-frequency electric furnace and a cooling system are mounted on one side of the frame in sequence, and a hydraulic station is mounted at the other end; and an electric numerical control system is arranged on the side surface of the frame. The numerical control ratchet cylinder hole shrinking machine has the following beneficial effects: compared with the prior art, the numerical control ratchet cylinder hole shrinking machine can realize synchronous implementation from loading to discharge; traditional molding of workpieces through pipe shrinkage by several steps is finished in one pipe shrinkage process; and the machine is simple structure, high in automation degree and low in machining cost, saves the space, reduces labors, and greatly improves the working efficiency and the product qual