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Abstract：
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The principle of electro-hydraulic servo control of the master cylinder motion for radial forging hydraulic press was analyzed, and the simulation model of the electro-hydraulic servo system was built by software AMESim based on the mathematic models of components and sub-systems in the electro-hydraulic servo system. Then, the influences of feedback mode, return pressure, pressure buildup time and loading frequency on the accuracy and rapidity of master cylinder motion were studied. The results show that compared with the master cylinder position feedback, the system operates more smoothly under the servo cylinder position feedback, and the reasonable return pressure is 3-12 MPa to ensure the response speed of system and the following of master cylinder to the servo cylinder. In order to ensure the rapidity, accuracy and economical efficiency of the system, the pressure buildup time is minimized. When the volume of high pressure oil supplying the master cylinder is 50000 mL, the time lag of servo cylinder is 0.03 s, and the follow lag of master cylinder to the servo cylinder is 0.01 s. When the system flow rate is fixed, increasing the forging frequency reduces the forging stroke, and reduces the control accuracy and lags the system response.
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Funds：
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中国博士后科学基金资助项目（2015M570850）；陕西省科技统筹创新工程计划项目（2015KTCQ01-81）；太原科技大学科研启动基金（20192007）
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AuthorIntro：
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牛勇（1981-），男，博士，讲师，高级工程师，E-mail：yong4102@163.com
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Reference：
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