一、Introduction to hydraulic AGC automatic thickness control system
Hydraulic AGC automatic thickness control system is the indispensable technical equipment for modern rolling mill to improve rolling precision and important guarantee for manufacturers to obtain advantage on markets with keen competition in the future. Yuanjing Company has established AGC professional system supported by many disciplines and integrates design, R&D, manufacturing, installation and debugging of hydraulic AGC automatic thickness control system to provide quality service to customers. Up to now, hydraulic AGC automatic thickness control system launched by our company has been applied in hundreds of cold rolling, hot rolling steel tape production lines at home and overseas. It can fully satisfy the accurate control over thickness of steel tape products.
In order to guarantee thickness precision and good shape of steel tape products, the system is provided with hydraulic press thickness automatic control (AGC), constant rolling roll-gap control (APC), constant rolling pressure control (AFC), thickness supervision, thickness pre-control. For thin products, tension thickness control and other functions may also be used. The system works reliably and operates easily and is provided with complete self protection functions. With database of rolling technology, when tape materials with different specifications are made, the corresponding rolling technology is only called to set the rolling status before rolling is started every time. After the system is applied, the thickness precision of cold rolling steel tape may reach: 0.15±0.003mm and 0.3±0.006mm (deviation of longitudinal thickness)
二、Main control function of the system
1、The function of hydraulic AGC automatic thickness control system:
（A）AGC function for thickness: adopt dynamic setting AGC including absolute value and relative value.
（B）AGC function for monitoring (at the time of installation of thickness gauge).
（C）AGC function for pre-control (at the time of installation of thickness gauge).
2、With the function to lift the roller quickly and calibration of the rolling mill.
3、The function of manual and automatic setting of roll-gap.
4、All types of over load protection and alarm display function.
5、The function to collect data, record, display of parameters during the rolling process.
6、The function to record fault.
7、Having good human-machine interface and dialogue function.
三、The function of hydraulic AGC automatic thickness control system
1、Remove the thickness deviation of steel tape due to water mark or head-end temperature difference.
2、Remove the thickness deviation of steel tape due to tension lost at the tail.
3、Reduce the time set for roller change and roll-gap to improve operation efficiency of rolling mill.
四、Main technical performance and indexes
1、The setting precision of roll-gap (thickness) is better than 0.001mm.
2、Control precision of tape materials thickness: ±1.5～3%h (steel tape thickness) the index is related to thickness gauge, incoming materials and rolling mill precision.
3、System response time: 30-50 ms