连续酸洗基础自动化控制模块研究与应用

连续酸洗过程中的最优速度控制、活套套量控制及张力控制等对提高机组稳定性和生产节奏,改善带钢表面质量有极其重要的作用。针对1 740mm酸轧机组,基于罚函数原理建立了速度目标函数模型,用于酸洗速度设定计算,从而保证了高强钢连续酸洗过程的速度协调和稳定;同时,通过活套入口、出口速度控制实现活套套量的同步控制,满足了酸轧机组对活套套量和张力的要求。建立酸洗过程张力设定计算模型,提高了张力控制精度和系统快速响应性能,实现了酸洗速度协调和节奏控制。实践证明,高精度的模型设定计算显著提高了高强钢连续酸洗后的表面质量和板形质量,使得高强钢生产成材率进一步提高,适合于工业生产实践。

Development and application of control module for basic automation in continuous pickling line

The effects of the control of the speed optimization，the control of the looper level and the control of the tension on increasing the stability of mills and production rhythm，and improving the surface quality of strips are extremely important in continuous pickling process. Aiming at 1 740 mm continuous pickling line and tandem cold rolling mills，based on the principle of penalty function，the objective function model of speed was established to calculate the pickling speed. And consequently，the speed coordination and stability of continuous pickling process for high strength steels were guaranteed. Meanwhile，the synchronous control for the looper level was achieved through the control of the entry and exit speed of looper，to meet the requirement of the looper level and tension. The setup calculation model of the tension for continuous pickling process was built，and then the accuracy of the tension control and the response performance of the system were improved，which realized the coordination of pickling speed and the control of rolling rhythm. The application results showed that the setup model with high computational accuracy could make the surface quality and flatness quality of high strength steels after pickling significantly improved，in addition，the qualified product ratio of production of high strength steels was further increased. Therefore，the model was suitable for the practical production.