Hemming machine for building material production

The utility model discloses a curling machine for building material production, which relates to the field of curling machines and comprises a building material template, a supporting platform is arranged on the outer wall of the bottom of the building material template, a first hydraulic rod is mounted on the inner wall of the top of the building material template, and a connecting plate is fixed on the outer wall of the bottom of the first hydraulic rod. A bidirectional ball screw is inserted into the inner wall of the side face of the connecting plate, a bidirectional motor is fixed to the outer wall of the side face of the connecting plate, a transmission belt is embedded in one side of the bidirectional motor, two sets of screw nuts are connected to the outer wall of the bidirectional ball screw in a twisted mode, and the two sets of screw nuts are symmetrically distributed on the outer wall of the bidirectional ball screw. And a fixing piece is inserted into the outer wall of the lead screw nut, a secon