冷轧培训资料

Work rolls工作辊Backup roll支承辊

Tension control 张力控制AIR blower 吹扫装置

Flatness Bar 板形仪

Camber system弯辊装置

Loading roll 液压装置

Rolling – The process of shaping metal by passing it between rolls rotating at the same peripheral speed and in opposite directions to reduce the gauge of a specific product in order to meet a c ustomer’s technical specifications.

轧制—为了满足客户技术要求，将金属通过两个转动的轧辊使其厚度减薄，两个轧辊的转动速度一致但是方向相反。

During the thickness reduction, the metal and work rolls heat up what leads to deformations affecting the metal flatness. Modern rolling mills are equipped with systems that are able to reduce possible flatness problems generated during the rolling process.

在厚度减少的过程中，金属和工作辊温度的升高影响板形。现代轧机安装了可减少在轧制过程可能出现的板形问题的系统。

To better understand how the control system works, let’s divide this process into parts which can in any way contribute to GOOD or BAD flatness, depending on how it is used.

为了更好地理解板形控制系统的运作情况，我们把这一工艺分成几个具体的部分，任何部分都可能促成良好板形或导致不良板形的产生，关键取决于其使用状况。

METAL 金属

FLATNESS BAR 板形仪

TILTING 倾斜

CAMBER or BENDING 弯辊

SPRAY (COOLANT NOZZLES) 喷射（轧制油喷嘴）

ENTRY TENSION 入口张力

EXIT TENSION 出口张力

板形控制过程

Flatness roll pressure distributed per segment 板形辊每

个部位压力的分布

用来纠正金属的抛物线板形，同时复制来料的板形，无论是正弯还是负弯。当需要时，位于轧机上的液压缸施力于工作辊轴承座上，从而改变工作辊的形状。

When POSITIVE CAMBER or BENDING is requested, the work roll geometry is shaped as below:

正弯时工作辊的几何形状如下：

正弯

When NEGATIVE CAMBER or BENDING is requested, the roll geometry is shaped is below:

负弯时工作辊的几何形状如下：

板形控制过程Oil distribution 轧制油的分布

入口张力控制是板形影响因素中一个至关重要的因素，不同的张力使用可能导致轧机入口处的高度不稳定性，从而导致金属速度在轧制单元（咬入）的不稳定性。

The back tension in sheet rolling mills must be kept constant throughout the rolling process to prevent losses in flatness performance and gauge.

轧机在轧制带材的整个过程中必须保持后张力的稳定性以避免板形和厚度偏差。

In the foil rolling process, the back tension influence on flatness is not so much since we used tension to control metal thickness.

后张力对轧制箔材的板形影响不及对轧制带材的影响，因为轧制箔材时，后张力主要用来控制厚度。

EXIT TENSION:

出口张力：

This is a fundamentally important element to maintain flatness outside the machine; if used inadequately, we will have coil cross profile errors which become worse during coil winding.

这是维持产品轧后板形的一个重要因素。如果出口张力不够，将出现横向板形问题，这一问题将在卷取时恶化。

As with entry tension, back tension must be kept constant until the coil is fully wound, including foil rolling, so that at the end of the winding there will not be any flatness errors which could have been introduced by increased tension for lack of uniformity.

对于入口张力，后张力必须保持一致直到卷取完毕（包括箔轧），只有这样，在卷取的最后阶段才不会有任何由于不均衡性而增加张力所导致的板形问题。

An aluminum foil rolling mill aims for good gauge, surface quality that will meet Customers Specifications as well as good mechanical properties for the downstream processes, i.e., meet all requirements at low cost.

箔轧机的目的在于生产厚度和表面质量良好的箔材以达到客户的标准，同时生产机械性能良好的产品以满足后续生产的要求，也就是以低的成本满足所有要求。

THE BASICS OF THE COLD ROLLING PROCESS

冷轧工艺的基础

Metal is deformed (cold hardened) and reduced to a specific gauge under pressure induced by a pair of rolls through which passes the metal.