Before cold rolling it is necessary to remove iron oxide from the sheet metal. A commonly used technological procedure is pickling with acid, but here it is done mechanically. Sheet metal is sandblasted and brushed. It is important that surface is well cleaned and has low roughness. The purpose of the thesis is to find out the dependence between processing parameters on the line and surface roughness of steel strip. There are many factors that have influence on the quality of finished product and they are presented in detail. Impacts on sheet metal were determined by measurements of surface roughness, which should be low. Two main goals, which were achieved, are increased productivity and reduction of the wear of abrasive brushes. We proved that it is possible to increase maximum speed of steel strip by 2 m/min if some parameters on the line are changed. The roughness was similar before and after the change. There are many other opportunities for further improvements.
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