六辊轧机防缠导板高精度定位控制

High Precision Positioning Control of Anti Winding Guide Plate for Six Roller Mill

冷轧硅钢对于带钢表面质量有较高的要求:表面不得有影响使用的划伤和因轧制液残留而产生的乳化液斑。为防止轧制过程中乳化液残留在带钢表面形成乳化液斑,单机架六辊轧机在入口出口处各设计了一套防缠导板。其目的在于:1.预防带钢断带时形成工作缠绕造成粘辊;2.阻隔和分流轧机上方乳化液滴落在带钢表面形成油斑。在轧制过程中,为保证阻隔分流效果,防缠导板需与轧辊保持一个小于5mm的间隙。同时导板不能与轧辊产生直接接触,以免划伤辊面。在实际现场作业时。传统的手动操作方式依赖于操作人员的经验和手感,无法做到精准定位。普通的电控定位,因轧辊的频繁更换、辊径配比的变化,无法得到准确的定位目标值。如何保证防缠导板与轧辊之间间隙的精确稳定,成为制约产品质量提升的重要问题。

Cold rolled silicon steel has higher requirements for the surface quality of strip steel:the surface shall be free of scratches that affect the use and emulsion spots caused by rolling fluid residue.In order to prevent emulsion from remaining on the strip surface and forming emulsion spots during rolling,a set of anti entanglement guide plates are designed at the entrance and exit of single stand six roller mill.The purposes are as follows:1.To prevent the sticking of roll caused by working winding when the strip is broken;2.The emulsion drops on the surface of strip steel to form oil spots above the blocking and shunting mill.In the rolling process,in order to ensure the separation effect,the anti winding guide plate needs to keep a gap of less than 5mm with the roll.At the same time,the guide plate should not be in direct contact with the roll to avoid scratching the roll surface.In the actual field operation,the traditional manual operation mode depends on the operator's experience and feel and can not achieve accurate positioning.Due to the frequent change of roll and the change of roll diameter ratio,the common electronic control positioning can not get the accurate positioning target value.How to ensure the precision and stability of the gap between the guide plate and the roller has become an important problem restricting the improvement of product quality.