Press fitting device for guide wheel assembly of electric spark wire cutting machine tool

The invention discloses a press fitting device for a guide wheel assembly of an electric spark wire cutting machine tool. The press fitting device comprises a bottom board; vertical rods and a drive air cylinder frame are arranged on the upper end face of the bottom board; gear brackets are arranged on the two sides of the drive air cylinder frame; an installation board is provided with a positioning board and a lifting air cylinder frame; guide rail seats are arranged on the two sides of the positioning board; a first rack on a piston rod of a drive air cylinder is engaged with a first gear; the first gear is engaged with a second gear at one end of a gear shaft; a sector gear is arranged at the other end of the gear shaft and engaged with a second rack; the lateral end of the second rack is connected with a pressing sleeve through a screw; an inner hole of the pressing sleeve is in sliding fit with a bearing positioning shaft; a photoelectric sensor is arranged in the pressing sleeve; the positioning board is provided with a U-type groove and a sliding groove; the lower end of a guide wheel supporting block is connected with a lifting air cylinder in the lifting air cylinder frame. The press fitting device is high in assembly precision and synchronism, ensures stable operation of electrode wires, improves the assembly efficiency and reduces manual operation errors.