Extrusion rolling method and apparatus

Details Extrusion rolling method and apparatus Extrusion rolling method and apparatus

B - Operations, Transporting

21

B

B21B 39/08 (2006.01) B21B 1/36 (2006.01) B21B 13/02 (2006.01) B21B 37/54 (2006.01)

Patent

CA 2285122

The present invention is an apparatus and method for reducing the total number of required rolling passes of a metal strip in a cold rolling mill to achieve a desired strip thickness. This is accomplished by increasing the exit strip tension of the metal up to 85% of the yield strength Y of the metal strip. This increase in exit strip tension allows a manufacturer to process :trip in an apparatus at a maximum thickness reduction of about 50 to 55% in a single rolling pass. At the same time, the increased exit strip tension will result in a reduced lever arm of the work roll of the cold rolling mill and will substantially reduce all of the roll separating force, motor torque and roll mill power of the apparatus.

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