Servo control system of 500 ton four-column hydraulic press

Abstract

The invention relates to a servo control system of a 500 ton four-column hydraulic press, and belongs to the technical field of industrial equipment. The servo control system includes a programmable logic controller, a touch screen, an Atos servo valve controller, an oil cylinder displacement sensor, a rodless cavity pressure sensor, an actuator, a hydraulic station, a communication module, a plunger oil pump and a vane pump, an oil cylinder displacement signal is obtained through the oil cylinder displacement sensor arranged in an oil cylinder, and the rodless cavity pressure sensor in the oil cylinder detects the pressure of a rodless cavity of the oil cylinder, and thus indirectly measures the pressure of the press; position control is conducted when the pressure of the press does not reach the set value, and the oil cylinder is controlled according to the setting position of the servo control system; and when the pressure reaches the set value, the pressure control is automaticallyswitched, and the oil cylinder is controlled according to the setting pressure of the servo control system. According to the servo control system of the 500 ton four-column hydraulic press, the control precision and efficiency of the press are improved, automatic switching of a pressure position control mode is newly arranged, and one key automatic suppression of the press is additionally arranged, not only is the automation level of the press improved, but also the labor intensity of workers is reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial equipment and relates to a servo control system of a 500-ton four-column hydraulic press. Background technique [0002] With the rapid development of the aluminum profile deep processing industry, the efficiency of the press machine is getting higher and higher, and the original press control technology only relies on the use of switch logic valve control or mixed proportional reversing valve control for positioning control, due to the yield of the profile The strength and shape are different, and the amount of springback after pressing is also different, so the repeat positioning accuracy of the press is not high, and the inching accuracy of the existing presses cannot achieve quantitative inching, that is, inching 0.1mm , so the existing method is to raise the pressure head, reset the stop position of the pressure head, and press again until the pressed profile size is qualified, so the effic...

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Problems solved by technology

[0002] With the rapid development of the aluminum profile deep processing industry, the efficiency of the press machine is getting higher and higher, and the original press control technology only relies on the use of switch logic valve control or mixed proportional reversing valve control for positioning control, due to the yield of the profile The strength and shape are different, and the amount of springback after pressing is also different, so the repeat positioning accuracy of the press is not high, and the inching accuracy of the existing presses cannot achieve quantitative inching, that is, inching 0.1mm , so the existing method is to raise the pressure head, reset the stop position of the pressure head, and press again until the pressed profile size is qualified, so the efficiency of the press is relatively low

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