Patent ID: 9523135
Filing Date: 2016-12-20
CPC Classification: B21B,B21C,C21D,H01F

Claim Text:
1. A method of cold-rolling a steel sheet coil, comprising: drawing out a leading end of the steel sheet coil from a pay-off reel; after the drawing, winding the leading end around a first tension reel via a single-stand reverse rolling mill; after the winding, rolling the steel sheet coil in a first pass with using the reverse rolling mill and giving a tension between the pay-off reel and the first tension reel; stopping the rolling in the first pass when a tail end portion of the steel sheet coil is at a position between the reverse rolling mill and a second tension reel; after the stopping, heating the tail end portion to a temperature within a range of not lower than 50° C. nor higher than 350° C. with a heater disposed between the reverse rolling mill and the second tension reel, and winding the tail end portion around the second tension reel; and after the heating, rolling the steel sheet coil in second and subsequent passes with using the reverse rolling mill and giving a tension between the first tension reel and the second tension reel.