| 摘要 |
<p>The invention relates to a device to periodically actuate one or more punches in a press. Said punches (7) are engaged with the lower part of a disk (15) elastically supported between a guide plate (5) and a support plate (8) fastened to the underneath of a press ram. Coaxial to the disk (15) extends a drive shaft (19) carrying, at the opposite end thereof, a free-wheel (20) connected through an actuating bar (21) to fluid-operated actuating means interlocked to a control unit in order to give the drive shaft (19) a rotational impulsion. Actuating mechanical means (23, 25, 28) acting on the disk (15) carries out, as a result of the rotational impulsion, an operating cycle comprising the steps of arranging the punches (7) in their operating position and, after a predetermined number of strokes of the ram, of returning said punches (7) to their rest position.</p> |
