Electrohydraulically-controlled pressing machine reversing through mechanical signal

Abstract

The invention discloses an electrohydraulically-controlled pressing machine reversing through a mechanical signal. The electrohydraulically-controlled pressing machine comprises an execution mechanism and a hydraulic control mechanism, wherein the execution mechanism comprises an execution cylinder body, an execution piston and a stamping rod; the hydraulic control mechanism comprises a first oil inlet pipeline and a second oil inlet pipeline, a pressure reducing valve, a three-position five-way reversing valve, a pressurization mechanism, a linkage mechanism and a hydraulic buffering control mechanism. A pressure continuously rises when the stamping rod enters the third stroke section to enable a workpiece to generate elasticoplastic deformation due to the cooperation of the pressurization mechanism and the hydraulic buffering control mechanism of the hydraulic control mechanism, so that the requirement of the workpiece on the gradual increasing of the pressure during the elasticoplastic deformation are met; and the hydraulic control mechanism in the invention enables the stamping rod to meet the change of the pressure in three stroke sections, so that the stamped workpieces are high in rigidity and low in rejection rate. The three-position five-way reversing valve and the stamping rod realize linkage through the linkage mechanism.

Description

Technical field [0001] The invention relates to the field of electromechanics, in particular to an electro-hydraulic controlled pressure machine with mechanical signal commutation. Background technique [0002] In the prior art, two forms of power are usually used to stamp a workpiece. One is to use mechanical transmission as power, that is, mechanical power; the other is to use hydraulic transmission as power, that is, hydraulic power. Generally, when the deformation of the workpiece is reduced, and the elastic-plastic modulus of the workpiece is small, and the pressure required for the deformation of the workpiece is small, mechanical power is more appropriate, because the mechanical power makes the punching action of the punching 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, hydraulic power is more appropriate, because hydraulic powe...

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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