Damping fin cutting device

The utility model discloses a damping fin cutting device which comprises a machine frame, a metering roller combination and a cutting mechanism which are sequentially arranged on the machine frame, and an electric cabinet which is electrically connected with the metering roller combination and the cutting mechanism. The device further comprises a rectangular swing frame, a first rotating shaft arranged in the middle of the rectangular swing frame, a roller and a balancing weight, the roller and the balancing weight are arranged on the two sides of the rectangular swing frame respectively, the rectangular swing frame is erected on the rack through the first rotating shaft and can swing freely with the first rotating shaft as the axis, and two infrared sensors are arranged at the positions, corresponding to the rectangular swing frame, of the rack. The two infrared sensors are electrically connected with the electric control box and used for detecting the swing angle of the rectangular swing frame. According to