Patent ID: 6453709
Filing Date: 2002-09-24
Classification: B21B,C23G

Abstract:
A method for continuous cold rolling of a metal band product wound into coils by running the band through a continuous line installation comprising successively, in the running direction of the band:an inlet section comprising at least means for unwinding coils after one another and a device for welding the downstream extremity, in the running direction, of a first coil with the upstream extremity of a following coil in order to form a continuous band, a treatment section by running the band in contact with a treatment fluid whose composition is set for pickling the band, a cold rolling section with adjustment of the rolling conditions in order to obtain a requested quality of the band, an outlet section comprising at least one means for shearing the rolled and means for winding the said band into a coil, at least two means for accumulating a variable length of band, whereas both means are interposed, respectively, one between the inlet section and the treatment section, and the other between the treatment section and the rolling section, to allow relative variations of the running speeds in each of the said sections, characterised in that the composition of the treatment fluid is determined so that the metal of the band is not attacked during a dwelling time in the treatment section corresponding to a minimum running speed in the order of a few metres per minute, that the rolling conditions are determined so that the requested speed of the band can be maintained at minimum rolling speed that may be as low as one meter per minute and that, during all the operating phases, the running speed in the treatment section and the running speed in the rolling section remain substantially similar.