Patent ID: 6237205
Filing Date: 2001-05-29
Classification: B21B,B21C,Y10T

Abstract:
A cold rolling apparatus comprising:an uncoiling unit that uncoils at least one steel strip;a joining unit that joins each of a leading end portion and a trailing end portion of the at least one steel strip to a dummy strip, the joining unit being disposed downstream of said uncoiling unit;a first coiling-uncoiling unit that coils and uncoils the at least one steel strip and dummy strips, said first coiling-uncoiling unit being disposed downstream of said joining unit;a reversing rolling mill that cold rolls the at least one steel strip, said reversing rolling mill being disposed downstream of said first coiling-uncoiling unit;a second coiling-uncoiling unit that coils and un-coils the at least one steel strip and dummy strips, said second coiling-uncoiling unit being disposed upwardstream of said reversing rolling mill;a third coiling-uncoiling unit that coils and un-coils the at least one steel strip and dummy strips, said third coiling-uncoiling unit being disposed downstream of said reversing rolling mill; andan interchanging device that switches respective positions of said first coiling-uncoiling unit and said second coiling-uncoiling unit by moving said first coiling-uncoiling unit and said second coiling-uncoiling unit which are linked together.