A Hydraulic Press Hydraulic System Capable of Fast and Stable Realization of Partial Loading

Abstract

The invention provides a hydraulic machine hydraulic system capable of realizing local loading rapidly and stably. The hydraulic machine hydraulic system comprises a power output system, a pressure control system and a loading system. Formation is achieved through multiple passes and multiple local loading steps. A loading zone can be transformed continuously through a low-pressure high-flow pumpand a high-pressure low-flow pump. It is guaranteed that a large forming load can be exerted on a loaded deformation zone rapidly, and a small restraint load is exerted on an unloaded zone in the forming process. Hydraulic cylinders obtain high-flow hydraulic oil in stages of descending and return stroke, and rapid descending and rapid return stroke are realized. An integrated cartridge valve adopted by the hydraulic system is rapid in response and sensitive in action. A charging valve adopted not only can assists in realizing rapid descending and rapid return stroke, but also can enable the hydraulic cylinders to rapidly reduce pressure after a loading step is completed, meanwhile energy consumption is reduced, and energy is saved. The local loading zone can be transformed multiple timeswithin primary-fire heating in the forming process, and the forming capacity larger than that of overall loading forming under the same installed power is obtained.

Description

technical field [0001] The invention belongs to the technical field of hydraulic systems of hydraulic presses, in particular to a hydraulic system of hydraulic presses capable of fast and stable local loading. Background technique [0002] Partial loading forming can effectively reduce the forming load, expand the forming size range of components, and improve the forming capacity of equipment. The forming load is applied, while a smaller forming load is applied to the mold in the unloaded area. At present, the double-acting hydraulic press generally consists of two hydraulic systems, the main and the auxiliary. The load provided by the auxiliary hydraulic system is relatively low. It can only provide restraint load to the unloaded area, and it is difficult to meet the forming load in the loaded deformation area, and cannot provide the corresponding load in the transformed loading area. forming load. [0003] When the hydraulic press has more than two main hydraulic systems...

AI Technical Summary

Problems solved by technology

Using ordinary hydraulic presses to locally load large and complex components, the forming cycle is long and the efficiency is low, which greatly limits the application of local loading forming in the forming and manufacturing of large and complex components of difficult-to-deform materials

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