Top die raising and lowering guide mechanism for punching, pressing, and shearing machines

Abstract

An improved top die raising and lowering guide mechanism for punching, pressing, and shearing machines having three hydraulic cylinder sets installed in a triangular configuration and, furthermore, three piston rod sets conjoined to an attachment mount to which is mounted a top die that is thereby guided during ascent and descent to execute punching, pressing, and shearing operations. The innovation of the present invention is that the top and bottom ends of the triangularly arranged three hydraulic cylinder sets are interconnected such that when a hydraulic system conveys hydraulic fluid to and from the top and bottom ends, the piston rods are simultaneously raised or lowered. The exposed lower ends of the three piston rod sets are conjoined to an attachment mount and the ascent and descent of the three piston rod sets is synchronized, stable, and provides equally distributed pressure and, based on the principles of plane triangular forms, the top die installed to the attachment mount is moved synchronously with the three piston rods to ascend and descend without flexion and twisting and, furthermore, in a stable and precise manner.

Dependencies are inferred from the claim text.