Forging Hydraulic Control Method Based on Double Monitoring System

Abstract

The invention discloses a forging hydraulic press control method based on dual monitoring systems and belongs to the technical field of hydraulic presses. The dual monitoring systems consist of a medium pressure monitoring system and a PLC (Programmable Logic Controller) monitoring system, wherein the medium pressure monitoring system is a comprehensive relay protection device. The method comprises the following steps that (1) the medium pressure monitoring system and the PLC monitoring system carry out self-check and initialization; (2) when both a diagnostic result of the medium pressure monitoring system and a diagnostic result of the PLC monitoring system are normal, a forging hydraulic press is started up; and (3) when either the diagnostic result of the medium pressure monitoring system or the diagnostic result of the PLC monitoring system is abnormal, a forging procedure is terminated, and alarm signals are sent out. According to the method, the medium pressure monitoring system and the PLC monitoring system are used for carrying out common diagnosis on the state of the forging hydraulic press, and a fault is cut off promptly when the fault occurs, so that the automatic control on the systems is realized, the error rate is reduced, and the security of the systems is improved; and meanwhile, the method has the advantages of simple structure, convenience in implementation and high control accuracy.

Description

technical field [0001] The invention belongs to the technical field of hydraulic presses, in particular to a forging hydraulic control method based on a dual monitoring system. 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 the field of free forging hydraulic presses, the tonnage has risen from several thousand tons to tens of thousands of tons , and the requirements for forging accuracy are getting higher and higher. At present, due to the heavy tonnage of large-tonnage heavy-duty hydraulic presses and relatively large strokes, at the same time, traditional forging hydraulic presses generally use low-voltage motors as power sources, which makes the actual production There are many problems: first, the power of the low-voltage motor is relatively small, and more than a dozen motors can ...

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Problems solved by technology

[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 the field of free forging hydraulic presses, the tonnage has risen from several thousand tons to tens of thousands of tons , and the requirements for forging accuracy are getting higher and higher. At present, due to the heavy tonnage of large-tonnage heavy-duty hydraulic presses and relatively large strokes, at the same time, traditional forging hydraulic presses generally use low-voltage motors as power sources, which makes the actual production There are many problems: first, the power of the low-voltage motor is relatively small, and more than a dozen motors can be selected to meet the requirements of the production cycle, so the floor area is large and there are many cables; secondly, the current of the low-voltage motor is large, and it will impact the grid when starting relatively large

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