Patent ID: 8695392
Filing Date: 2014-04-15
Classification: B21B,B30B

Abstract:
1. A six-high rolling mill including upper and lower work rolls as a pair for rolling a metal strip, upper and lower intermediate rolls as a pair for supporting the work rolls, and upper and lower back-up rolls as a pair for supporting the paired upper and lower intermediate rolls, with only the intermediate rolls having a roll shoulder whose roll diameter decreases, the six-high rolling mill having no supporting rolls inside and extending beyond both sides of a rollable strip width of the work rolls, wherein the work rolls comprise a material having a high modulus of longitudinal elasticity, and a minimum roll diameter of the work rolls is between a minimum diameter upper limit Dmax the minimum diameter upper limit Dmax where D B is a strip width (mm) of the work rolls/1,300 mm, and K is the ratio for modulus of longitudinal elasticity of the high longitudinal modulus material to a material with conventional modulus of about 21,000 kg/mm the minimum diameter lower limit Dmin where D