| 摘要 |
<p>A modular conversion unit for converting punching machines from single-punch to multiple-punch comprises an upper main cylindrical magazine (3) rotatably supported by a turret (1) of the punching machine and provided with a plurality of radial seats (4a-4e) for accommodating corresponding upper secondary cylindrical magazines (5a-5e), supporting a preset number of punches (6) surmounted by corresponding hammer elements (7a-7e) fitted so as to rotate, a corresponding lower main cylindrical die-holder magazine (8) accommodated so as to rotate synchronously and in alignment with said upper cylindrical magazine in a hollow seat (8a) formed in a worktable (2) of the punching machine and provided with a corresponding number of radial seats (9a-9e) for lower secondary die-holders (10a-10e) vertically aligned with the upper secondary magazines (5a-5e), each die-holder (10a-10e) being provided with a plurality of dies (11) whose number is equal to the number of the punches (6). The unit also comprises a first motor (12) for producing a controlled rotation of the upper main cylindrical magazine (3) with respect to the turret (1), a second motor (13) which intervenes alternatively and actuates, with a controlled rotation, the hammer elements (7a-7e) with respect to the corresponding secondary cylindrical magazines (5a-5e), and a third motor (14) for the controlled rotation of the lower main cylindrical magazine (8) with respect to the seat synchronously with the upper main magazine (3). <IMAGE></p> |
