| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.27 ( November 1992 ) Hot-Rolled, Cold-Rolled and Surface Coated Steel Sheets and Electronics and Instrumentation ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Edge-Drop Control of Hot and Cold Rolled Strips by a Tapered-Crown Work Roll Shifting Mill Kunio Kitamura, Ikuo Yarita, Namio Suganuma, Toshinobu Nakanishi, Ko Toyoshima |
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Synopsis : In the rolling of hot and cold rolled strip, one of the essential tasks is a minimization of edge drop, which is a sharp reduction in the transverse thickness profile at strip edges. The authors made an experimental study of deformation behavior at strip edges, followed by an investigation into the characteristics of edge drop control on a tapered-crown work roll-shifting mill by using a laboratory mill and commercial cold and hot strip rolling mills. The results of finding: (1) The edge drop is caused by three dimensional material flow which occurs at the strip edge, and is largely affected by changes in the work roll profile resulting from roll flattening, (2) in the cold rolling tandem mill, edge drops can be markedly corrected by applying a one-side-tapered crown work roll shifting mill used at one stand upstream, and (3) in the hot strip mill, the one-side-tapered crown work roll shifting mill is also found effective in improving edge dorps. |
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