Strip guidance on the coiler
Strip guidance on the coiler without a mechanical link
Strip guidance on the coiler ensures coils with straight lateral surfaces, which prevents damage to strip edges during further transport and handling. To achieve this aim, strip edge guidance systems are generally used. Strip centre guidance systems are recommended when the strip is coiled with natural edges and when the strip will be centrally fed to further processing stages. Since the strip does not always leave the processing area at the same point, the coiler follows lateral strip migration, in order to ensure straight-edged coiling.
Strip edge sensing systems for coilers must always be installed in the immediate vicinity of the deflector roll and be connected to the movable part of the coiler. This connection may be mechanical or, as shown in this example, separate synchronous run control may be used. In addition, it is of utmost importance that the strip clings to the deflector roll and does not slip or incline. An adequate wrapping angle on the deflector roll and sufficient strip tension must ensure that the strip closely follows the roll contour. Large roll diameters are recommended.
For the coiling of strip with slightly thickened edges, which is likely to occur when applying a surface coating, the system and the equipment are extended to cater for staggered winding. A constant pattern of the serrated coil edge is achieved when taking account of the coiler speed and the sheet thickness.
