减小同板差的控制技术

惯用控制同板差的方法是以预设定模型为基础的恒辊缝自动位置控制（ＡＰＣ）或压力反馈自动厚度控制（ＡＧＣ）．由于存在压力模型的预报误差、压下系统的动态响应时间及轧辊偏心等不利因素，上述控制方法不能获得满意的控制效果，同板差的统计结果一般在０．２５～０．６０ｍｍ范围内．在控制同极差方面开发了液压压下系统的动态智能控制与同步控制算法、由光电编码器构成的偏心控制方法、轧机刚度曲线在线自动测量等控制技术，并在马鞍山钢铁股份有限公司中板厂的中板轧机上获得工业应用，取得了同板差在０．０８～０．１５ｍｍ的控制效果．

The Techniques to Reduce Variations within One Plate

Conventional techniques to control variations within one plate have been based on preset models and constant automatic position control (APC or pressure feedback automatic gauge control(PAGC).However.because of the rolling force prediction error in the preset models and of the inadequate response speed of dynamic system and of the eccentricity, etc.,the conventional method has not given satisfactory results, the statistics'variations within one plate are in range of 0.25-0.60 mm The authors have developed the techniques to control the variations, which are dynamic intelligent control of hydraulic screwdown system. synchronism control of hydraulic screwdown, eccentricity control method by rotary encoder and the curve of modulus of mill measured automatically, etc., The techniques were fully and successfully industrialized in The Plate Mill of Maanshan Iron and Steel Company and good results that variations are in range of 0.08-0.15min hare been obtained in that mill.