Positioning device for punching curtain wall curved surface profile

The utility model relates to the technical field of punching devices, and discloses a positioning device for punching curtain wall curved surface section bars, which comprises an L-shaped bottom plate, the left side of a vertical plate of the L-shaped bottom plate is fixedly connected with an air cylinder, the left end of the air cylinder is fixedly connected with a sliding plate, and the top surface of the sliding plate is fixedly connected with a punching machine. The bottom face of the front face of the sliding plate is rotationally connected with a screw rod. The air cylinder stretches out to promote the punching machine to punch the curved surface profile, when the air cylinder contracts to promote the rear side toothed plate to move rightwards and be matched with the upper side one-way bearing, the upper side gear is promoted to rotate to drive the screw rod to rotate, the two nuts are promoted to drive the curved surface profile to move upwards, and the height of the curved surface profile is adjusted.