During the cold rolling process (between 40°C and 70°C), the thickness of rolling stock will naturally be reduced. Typically, process liquids such as rolling oil emulsions, temper rolling liquids or process detergents, are circulated and regenerated in closed circuits.
SensoTech offers tried and proven solutions to ensure continuous quality control of these liquids for numerous well-known suppliers such as Quaker, Henkel and Houghton. LiquiSonic for rolling mills is successfully employed for all types of rolling stands and treatment plants for stainless steels, carbon steels, and non-ferrous metals.
In specific applications such as reversing mills and tandem mills, the concentration of the rolling oil-in-water emulsion is directly measured in the transport pipeline from the emulsion tank to the rolling stand, and is controlled at a constant concentration level. This prevents variations in the quality of the rolling stock caused by over- and under-lubrication. Such effects mainly occur because of unavoidable water loss and foreign oil carry-over, like morgoil and hydraulic oil.
In reversing mills, the rolling oil will run through the mill several times. This is beneficial for production plants with low capacity,y and for a better microstructure. The tandem mill is used in larger production plants, as the metal strip is running continuously to ensure a higher throughput; by using different emulsion concentrations, an optimal surface finish can be guaranteed.
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