| 摘要 |
<p>The press comprises a mobile lower beam controlled by at least three hydraulic actuators (5a, 5b, 5c) two of which are located at the ends of the beam and at least one of which is located at the centre on the beam's centre time. The hydraulic circuit is linked with a device which can detect the presence of a tilting moment on the mobile beam (2), and with a comparator and calculating system connected to the detection device. The actuators (5a, 5b, 5c) are connected to a common directional distributor (12) via pressure regulating devices (15a, 15b, 15c) controlled by the comparator and calculating system which can effect a continuous reduction in the pressure exerted on the actuator (5a or 5b) located at the end opposite to the direction of the tilting moment, and optionally also in the pressure exerted on the central actuator (5c), in order to create a restoring moment against the tilting moment.</p> |
