Electro-hydraulic control pressure machinery with hydraulic buffer control mechanism

Abstract

The invention discloses an electric hydraulic control pressure machine with a hydraulic buffering control mechanism. The electric hydraulic control pressure machine is used for stamping workpieces. The electric hydraulic control pressure machine comprises an executing mechanism and a hydraulic control mechanism for providing pressure for the executing mechanism and controlling the executing mechanism. The hydraulic control mechanism comprises a first hydraulic pipe, a second hydraulic pipe, a third hydraulic pipe, a pressure reducing valve, a first control unit, a pressurization mechanism, a second control unit and the hydraulic buffering control mechanism. The pressurization mechanism of the hydraulic control mechanism is matched with the hydraulic buffering control mechanism, so that when a stamping rod enters a third stroke section to make the workpieces undergo elasticoplastic deformation, pressure rises continuously, and requirements of gradually increasing pressure during elasticoplastic deformation of the workpieces are met. Since the hydraulic control mechanism makes the stamping rod conform to pressure changes of three stroke sections, so that 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 with a hydraulic buffer control mechanism. 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 app...

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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