PURPOSE: To suppress the fluctuation in tension during continuous rolling and to improve the accuracy of a sheet thickness by starting the change in the roll gap of each stand before arrival of the weld point of metallic strip materials which are different in conditions for base sheets at each stand.
CONSTITUTION: Rolling of the metallic strip materials which are different in the conditions for the base sheets, i.e., material strength K1, K2 and sheet thicknesses HI1, HI2 on the inlet side by a tandem rolling mill after joining said materials is so controlled that the change of the roll gap is started as shown by a solid line III before arrival of the weld point thereof at the stand and that the change of the roll gap is under progression at the time T0 for the passage of the weld point through said stand. The max. value of the error in the roll gap is thus decreased and the tension fluctuation arising from the error is decreased, by which the absolute accuracy of the sheet thickness on the outlet side is improved.
KITAMURA KUNIO
YARITA YUKIO
SASAKI TOORU
| JPS56114514A | 1981-09-09 | |||
| JPS60152310A | 1985-08-10 |
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