Locking mechanism of steel post machining, milling, cutting and forming machine

The utility model discloses a locking mechanism of a steel post machining, milling, cutting and forming machine. The locking mechanism comprises a movable board, a rotary shaft and an upper pressing ring. The rotary shaft is fixed to an operation platform of a milling machine. One end of the rotary shaft is fixedly connected with a motor. The surface of the movable board is fixedly provided with lower backing rings and the two ends of the bottom of the movable board are respectively and fixedly connected with a rack. Each rack is in rotation connection with a gear on the rotation shaft. The surfaces of the milling machine are respectively provided with an extension frame. One end of each first air cylinder is fixedly connected with the corresponding extension frame and the other end of each first air cylinder is fixedly connected with the corresponding upper pressing ring. The two sides of the movable board are respectively provided with a material passing disc. A plurality of second air cylinders are arrange