Die steel clamping device

The utility model discloses a die steel clamping device which comprises a main frame, supporting columns, a clamping piece and a driving piece, the number of the supporting columns is two, the two supporting columns are distributed on the two sides of the top of the main frame at equal intervals, the clamping piece comprises an air cylinder, the inner side of the air cylinder penetrates through the inner sides of the supporting columns through piston rods and is provided with an installation block, and the driving piece is arranged on the main frame. Clamping plates are mounted on the inner sides of the mounting blocks, and buffer springs are mounted on the front sides and the rear sides of the outer sides of the clamping plates correspondingly. According to the technical scheme, due to the arrangement of the asynchronous double-shaft servo motor, forward rotation and reverse rotation can be achieved, instant stop can be achieved, the frequency of the number of revolutions can be set, the self-locking functio