Eccentric-load preventing hydraulic system of hydraulic-roll-cutting-type metal plate shearing machine

Abstract

The invention relates to the technical field of hydraulic-roll-cutting-type metal plate shearing machines, in particular to an eccentric-load preventing hydraulic system of a hydraulic-roll-cutting-type metal plate shearing machine. The eccentric-load preventing hydraulic system comprises a first servo hydraulic cylinder loop, a second servo hydraulic cylinder loop and an eccentric-load preventingloop which are hinged to a rack and an upper tool rest correspondingly. In the rolling shearing process, the first servo hydraulic cylinder loop and the second servo hydraulic cylinder loop are usedfor ensuring the position precision of the tool rest and meanwhile conducting pressure precise control and timely adjustment on rodless cavities of servo hydraulic cylinders; and the eccentric-load preventing loop is used for balancing the weight of the upper tool rest, so that the eccentric-load force borne by a piston rod is reduced, the service life of the servo hydraulic cylinders is prolonged, meanwhile, sudden falling of the upper tool rest due to leakage of the servo hydraulic cylinder hydraulic system or pipeline breakage can be prevented, the tool rest is effectively protected againstdamage, and personal safety is effectively protected. The eccentric-load preventing hydraulic system has the beneficial effects that the rolling shearing process is extremely stable by using the eccentric-load preventing loop, and the characteristics of simple structure, high practicability and easy implementing are achieved.

Description

Technical field [0001] The invention belongs to the technical field of hydraulic rolling-cut metal plate shears, and specifically relates to a hydraulic system of an anti-eccentric load hydraulic rolling-cut metal plate shears. Background technique [0002] The hydraulic rolling-cut metal plate shearing machine is a large-scale steel plate shearing equipment for segmenting steel plates to length. It is one of the core equipment for modern medium and thick plate production. The hydraulic rolling-cut metal plate shearing machine is based on the rolling shearing principle and adopts a servo hydraulic cylinder to directly drive the composite connecting rod shearing mechanism to realize the arc-shaped upper shearing blade to roll and shear the steel plate horizontally. The servo hydraulic cylinder and the frame adopt the form of horizontal articulation installation. During the rolling shearing process, the servo hydraulic cylinder swings slightly. Due to the influence of the self-wei...

AI Technical Summary

Problems solved by technology

Due to the influence of the self-weight of the tool holder, a partial load force will be generated during the extension and retraction of the servo hydraulic cylinder, which will cause partial friction between the piston rod and the guide sleeve, the piston and the cylinder, and long-term operation will cause the servo hydraulic cylinder to Scratches on the inner wall of the cylinder cause internal leakage, which affects the output characteristics and service life of the servo cylinder

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