摘要 |
<p>The disclosed process is intended to the fabrication, by drawing of metal plate, of toothed crown pulleys (P, P') and comprises the following operations. In the first place, an initial disc (1) having a circular contour is used which comprises meanswhich, once the pulley (P, P') has been formed, provide for its coupling to a transmission shaft; subsequently, the initial disc (1) is transformed by drawing into a revolution preform (2) wherein two coaxial portions are distinguished, the coupling portion (4) and the main cylindrical portion (5) having a planar wall; then, by means of a forming device (C) comprised of a dye (12) and a punch (13) coaxially arranged between each other and with respect to the preform (2), a toothing (d) is formed by drawing in the side wall of said main portion (5) by axial sliding of the punch (13). Application to the car industry.</p> |