Master cylinder driving system of heavy dual-function hydraulic machine and using method of master cylinder driving system

Abstract

The invention provides a master cylinder driving system of a heavy dual-function hydraulic machine. According to the master cylinder driving system of the heavy dual-function hydraulic machine, a large-flow oil supply pump, a small-flow oil supply pump and a variable oil supply pump which are arranged in parallel are adopted, the three oil supply pumps are cooperatively and respectively connected to a bypass oil discharge loop and a plunger cylinder through one-way control valves, in the use process, any one, two or three of the three oil supply pumps are selected according to the speed requirement of the plunger cylinder, and therefore the requirement of the plunger cylinder for high-pressure large-flow oil liquid in the vertical extrusion process can be met through rapid oil supply; a small-drift-diameter main oil path control branch and a large-drift-diameter main oil path control branch between an oil supply loop and the plunger cylinder are utilized, precise regulation and control of the speed of the plunger cylinder can be realized so as to meet the requirement of die forging for precise control over the high-pressure oil liquid flow entering the plunger cylinder, therefore, the foundation can be provided for achieving the two functions, namely die forging and vertical extrusion on the heavy hydraulic machine, the processing and manufacturing cost can be reduced, and the use efficiency of the single heavy hydraulic machine can be improved.

Description

technical field [0001] The invention relates to the technical field of plunger cylinder control of a heavy hydraulic machine, and more specifically, to a driving system of a main cylinder of a heavy double-function hydraulic machine and a control method thereof. Background technique [0002] With the continuous advancement of science and technology in our country, the demand for heavy machinery is increasing, and the application of large-tonnage hydraulic presses is also increasing, especially in die forging and ferrous metal vertical extrusion machines, the tonnage has changed from the previous several thousand Tons rose to tens of thousands of tons. [0003] In the die forging process, the movement speed of the moving beam is low, but the movement speed accuracy of the moving beam needs to be strictly controlled, so the high-pressure oil flow into the plunger cylinder needs to be precisely controlled; while in the vertical extrusion process, especially In the vertical ext...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a driving system for a main cylinder of a heavy-duty dual-function hydraulic press and a method for controlling the speed of a plunger cylinder using it, in order to solve the technical problem that the existing heavy-duty hydraulic press has a single function and can only realize one of the functions of die forging or vertical extrusion

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