Transactions of Materials and Heat Treatment

Title：Hydraulic synchronous control on bending machine based on PLC

Authors： Song Yalin Jiang Ning

Unit： Ezhou University Hubei EZHONG Heavy Machinery Limited Company

KeyWords： bending machine synchronous control system PLC hydraulic cylinder synchronous precision

ClassificationCode：TH137.7

year,vol(issue):pagenumber：2015,40(8):91-93

Abstract：

For the issue that the open-loop control system of the original version of bending machine is neither stable nor precise enough, the new version was improved with a hydraulic synchronous closed-loop control system based on the technique of PLC. The mature technology was applied during the modified process. The modified hardware was composed of hydraulic synchronous driver devices, S7-300 and SMART 1000IE produced by SIEMENS and so on. The working pressure of the main hydraulic cylinder was 19.5 MPa. The dynamic pressure of the upper roll was 10500 kN. It is found that the modified bending machine can realize digital control and automatic compensation in the bending process. The precision of the synchronization control can achieve or less than ±0.5 mm. The machine can set the length of the preflex straight flange at the end. Also, it can flex materials continuously without a relief angle. Therefore, the new controlling system is stable, safe and convenient.

Funds：

湖北省教育厅科研项目（B2014179）

宋亚林(1964-)，男，学士，副教授江宁(1975-)，男，硕士，工程师

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