| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.7 ( March 1983 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Improvements in Cold Rolling of Extra-thin Gage Strip Yoshi Nakazato, Fumiya Yanagishima, Toshio Tamiya, Toko Teshiba, Hideo Kuguminato, Takuya Araki, Shunji Fujiwara |
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Synopsis : At Chiba Works, many kinds of technical improvement have progressed which permitted economical and stable production of extra-thin cold rolled steel sheet for tinplate and galvanized sheets with high quality: (1) In tandem cold mills, "Keyless bearing", hydraulic push-down BISRA-AGC, roll eccentricity control and 6-high mill were adopted for improving gage accuracy and flatness. Moreover the highly efficient rolling lubricant providing method, "Hybrid system", was established. (2) Through hot rolling at low finishing temperature, the material was made softer so that easy cold rolling and good flatness would be attained. (3) In skinpass rolling, both brightness and flatness of strip were improved by selection of suitable roughness of the work roll surface. |
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