| 摘要 |
<p>Device to automatically adapt the bending pressure, proportionally to the working pressure of the cylinders of the upper cross-piece, particularly in a press-bending machine and a machine so obtained characterised in that it consists essentially in the interaction of at least two parts, respectively a first of proportional division of the pressure and in particular for the adjustment of the cylinder pressure (6) proportional to the cylinder pressure (3, 3') chosen by a switching means (15), said switching means being suitable for intercepting a lower pressure than that of the cylinder (3, 3') of the upper cross-piece (1) and a second one for the evacuation of the exceeding pressure, re-establishing the machine (A) to its original conditions for a subsequent press-bending cycle.</p> |
