Large-scale die forging water press pressure lack on-line detection method

Abstract

An undervoltage on-line measurement method of die forged piece in large-size die forging hydraulic press is provided, which realizes the on-line measurement of undervoltage of die forged piece by using a MTS displacement sensor. The method comprises accurately measuring, by using the displacement sensor, the downward movement distance of the magnetic loop along with the moving cross beam when applying a pressure on the die forged piece, compare the measured distance with the predetermined distance for operation of the hydraulic press, calculating the undervoltage value of the die forged piece, establishing the relationship between the pressure and the strain capacity of the die and its bearing according to the research and analysis, and forming a pressure-strain capacity analytic curve. The method helps to compensate the undervoltage calculation error caused by the compressive strain of the die and its bearing, increase the measurement accuracy of undervoltage calculation of die forged piece in large-size die forging hydraulic press, and significantly improve the processing quality of die forged piece.

Description

[technical field] [0001] The invention relates to a control system of a large-scale die forging hydraulic press, in particular to an online detection method for underpressure of die forgings. [Background technique] [0002] Large die forging hydraulic press is an important mechanical equipment in the machinery manufacturing industry, which is used for forging high-strength aluminum alloy forgings or complex forgings with holes. The die forging process is completed by the active parts such as the movable beam, the left and right horizontal beams, the ejector and the side ejector in the moving worktable in order. The movement speed and stroke of each part are controlled by the digital electro-hydraulic servo system in the way of "oil control water". The oil pressure system drives the distributor, the distributor controls the water valve, and the high-pressure water enters different working cylinders to drive the movable working part to complete the die forging process. The u...

AI Technical Summary

Problems solved by technology

At present, there is no report in the world that the underpressure of die forgings can be detected online. It can only be measured offline. Operators cannot intuitively understand the underpressure of die forgings during die forging processing of hydraulic presses, resulting in certain blindness in operation. Conducive to improving the overall quality of die forgings

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