Method of cold-rolling steel sheet and cold-rolling facility
View Patent ↗In cold-rolling a steel sheet coil, when a tail end portion of a steel sheet coil ( 7 ) is wound around a tension reel ( 3 ) prior to second-pass rolling after the completion of first-pass rolling, the tail end portion is heated to a temperature within a range of not lower than 50° C. nor higher 350° C. with a heater disposed between a rolling stand ( 1 ) and the coil tail end-side tension reel ( 3 ).
1. A cold-rolling facility for cold-rolling a steel sheet coil comprising:
a pay-off reel from which the steel sheet coil is uncoiled;
a single-stand reverse rolling mill;
a first tension reel on the opposite side of the reverse rolling mill from the pay-off reel;
a second tension reel on the same side of the reverse rolling mill as the pay-off reel;
a deflector roll disposed between the reverse rolling mill and the second tension reel, and
a heater disposed between the deflector roll and the second tension reel, and heating a tail end portion of the steel sheet coil.
2. The cold-rolling facility according to claim 1 , wherein the heater has a header unit jetting steam from a plurality of nozzles.
3. The cold-rolling facility according to claim 1 , wherein the heater is an electric heater.
4. The cold-rolling facility according to claim 1 , comprising a coil end guide disposed between the deflector roll and the second tension reel and including the heater.
5. The cold-rolling facility according to claim 2 , comprising a coil end guide disposed between the deflector roll and the second tension reel and including the heater.
6. The cold-rolling facility according to claim 3 , comprising a coil end guide disposed between the deflector roll and the second tension reel and including the heater.