公开(公告)号：US20070012171A1

公开(公告)日：2007-01-18

申请号：US10557023

申请日：2004-05-14

申请人： Stefan Schmidt ,  Rolf Heidenfled

发明人： Stefan Schmidt ,  Rolf Heidenfled

IPC分类号： F01B25/02

CPC分类号： B30B15/16 ,  B30B15/161 ,  F03C1/007 ,  F15B11/022 ,  F15B11/024 ,  F15B11/028 ,  F15B11/036 ,  F15B2211/20592 ,  F15B2211/3133 ,  F15B2211/6653

摘要： What is disclosed is a hydraulic drive mechanism for a blanking or forming machine comprising a working cylinder having several pressure chambers, the piston of which acts directly or indirectly on a workpiece to be processed, wherein at least one pressure chamber of the working cylinder for retracting and extending the piston is adapted to be subjected to a tank pressure or a supply pressure via a continuously adjustable valve, and comprising a valve assembly arranged upstream of the continuously adjustable valve, whereby an inlet port of the continuously adjustable valve may be subjected to a higher or lower supply pressure, wherein the valve assembly comprises a switching valve adapted to be switched over between a basic position and a switching position in dependence on the load pressure at the working cylinder in order to tap the supply pressure from a low-pressure source or from a high-pressure source.

摘要翻译： 所公开的是一种用于冲裁或成型机的液压驱动机构，其包括具有多个压力室的工作缸，该工作缸的活塞直接或间接地作用在待加工的工件上，其中用于回缩的工作缸的至少一个压力室 并且延伸的活塞适于经由连续可调节的阀进行罐压力或供给压力，并且包括设置在连续可调节阀的上游的阀组件，由此可连续调节的阀的入口可以经受 更高或更低的供应压力，其中阀组件包括适于根据工作气缸处的负载压力在基本位置和开关位置之间切换的切换阀，以便从低压源 或来自高压源。