Hydraulic loading platform control system of vacuum hot-pressing equipment

LI Da-wei1,2
(1.College of Automatic Control Engineering, Liaoning Equipment Manufacturing Vocational and
Technical College, Shenyang 110161,China; 2.College of Automatic Control Engineering,
Liaoning Radio and Television University, Shenyang 110034,China)

Abstract: Aiming at the problems in the research of composite materials performance parameters, it was necessary to pressurize and maintain pressure, a hydraulic loading platform with vacuum environment was designed. The mechanical structure, control mode and key control points were studied. A hydraulic control system based on PLC which realized the control of the speed, position and pressure of the hydraulic loading platform was proposed. Firstly, the principle of hydraulic system was described. Then the hardware of the control system was designed, and the software of the control system was designed. Finally, the loading platform was tested. The results indicate that the hydraulic loading platform can realize the functions of rapid pressure and automatic pressure maintaining in the range of 0~10 000 kg, with the pressure control accuracy of 99%; it can realize the rapid positioning control in the range of 0~1 000 mm, with the position positioning accuracy of 99.2%.

Key words: hydraulic loading platform; pressure control accuracy; position positioning accuracy; constant pressure and steady pressure control