Electro-hydraulic control pressure machinery

Abstract

The invention discloses an electro-hydraulic control pressure machine used for stamping workpieces. The machine comprises an execution mechanism and a hydraulic control mechanism which provides pressure for the execution mechanism and controls the execution mechanism. The hydraulic control mechanism comprises a first hydraulic pipeline, a second hydraulic pipeline, a third hydraulic pipeline, a pressure reducing valve, a first control unit, a pressurization mechanism, a second control unit and a magnetic control mechanism. The pressurization mechanism and the magnetic control mechanism are arranged in the hydraulic control mechanism, pressure is continuously increased when the pressurization mechanism and the magnetic control mechanism are matched for enabling a stamping rod to enter a third stroke section to cause elasticoplastic deformation of the workpieces, and therefore the requirement of the workpieces for continuously increasing pressure during elasticoplastic deformation is met. Due to the fact that the stamping rod adapts to pressure changes of three stroke sections through the hydraulic control mechanism, the stamped workpieces are good in rigidity, and the rejection rate of the stamped workpieces is low.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic control, in particular to an electro-hydraulic control pressure machine. Background technique [0002] In the prior art, two types of power are usually used for stamping workpieces. One is to use mechanical transmission as the power, that is, mechanical power; the other is to use hydraulic transmission as the power, that is, hydraulic power. Generally, when the deformation of the workpiece is reduced, the elastic-plastic modulus of the workpiece is small, and the pressure required for the deformation of the workpiece is small, it is more appropriate to use mechanical power, because the mechanical power makes the stamping action of the stamping rod faster. When the deformation of the workpiece is large, and the elastic-plastic modulus of the workpiece is large, and the pressure required for the deformation of the workpiece is large, it is more appropriate to use hydraulic power, because h...

AI Technical Summary

Problems solved by technology

[0007] 1. The return stroke control of the stamping rod is complicated, and the return stroke response is not more sensitive

[0008] 2. When the stamping rod returns, the return speed is unstable, resulting in different return times each time

[0009] 3. The feed speed of the first stage and the second stage of the stamping rod is unstable, and the response to pressure changes is slow

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