Friction press with optical grating protection device

The invention provides a friction press with an optical grating protection device. The friction press comprises a rack, a rotating shaft is rotationally connected to the top of the rack through a side support, one end of the rotating shaft is in transmission connection with a first motor, the other end of the rotating shaft is provided with an axial driving mechanism, and a left friction disc and a right friction disc are arranged on the rotating shaft; a flywheel is horizontally arranged between the left friction disc and the right friction disc, a lead screw is fixedly connected to the lower end of the flywheel and connected with a nut arranged at the middle portion of the rack, and the lower end of the lead screw is connected with a movable die; a base is arranged at the bottom of the rack, a groove is formed in the top face of the base, a fixed die is placed in the groove, and a die cavity is formed in the fixed die; and a vacuumization hole is formed in the lower end of the die cavity and connected with