Riveting die apparatus incorporating positioning device

摘要

A riveting die apparatus includes an upper die (30) and a lower die (40). The upper die includes two punches (34) and a guide post (36). The lower die includes a lower mold plate (42). The lower mold plate defines two through apertures (60) corresponding to the punches, and two piston holes (58) in communication with the through apertures. Two blocks (44) are secured below the lower mold plate. Each block defines a blind hole (48) in communication with the corresponding piston hole. A spring (50) is accommodated in each combined piston hole and blind hole. A rod (52) is movably received in each through aperture and piston hole. A base (53) of each rod is accommodated in the piston hole, and abuts the corresponding spring. A guide bushing (54) is mounted on the lower mold plate. Workpieces placed on the lower mold plate are precisely positioned by the rods.