Numerical control self -centering center frame

The utility model discloses a numerical control self -centering center frame aims at providing the numerical control self -centering center frame that can carry out the centre gripping to different diameter work pieces, and its technical scheme main points are, include the lathe bed, be located the anchor clamps of lathe bed one end and be located the cutting bed that anchor clamps one end was kept away from to the lathe bed, be equipped with on the lathe bed and make heart centre frame by oneself, make heart centre frame device by oneself including being fixed in support on the lathe bed, lieing in circular logical aperture frame on the support, running through logical aperture frame and locate the pulley on the horizontal pole with the ejector pin that leads to aperture frame threaded connection, the concave type support that lies in the ejector pin bottom, horizontal pole and the cover that lies in on the support, the ejector pin top still is equipped with the hand wheel that is used for rotating the eject