PURPOSE: To prevent edge crack and to improve yield by cold tandem rolling a silicon steel sheet whose silicon content is limited under specified conditions. ;CONSTITUTION: At the time of rolling the silicon steel sheet whose silicon content is ≥1.5wt.% with a cold tandem mill, edge grinding treatment that the allowance for grinding is ≥0.5mm in the width direction from the edges of sheet is executed just after trimming in the side trimming stage before rolling. At the time of tandem rolling after that, one ends of the work rolls of a 1st stand are made claviform, upper and lower work rolls are arranged so that their axial directions are reverse to each other and they are made to be movable in the axial directions of the work rolls. And also one ends of the work rolls of stands after a 2nd stand are tapered down, upper and lower work rolls are arranged so that their axial directions are reverse to each other and they are made to be movable in the axial directions of the work rolls.;COPYRIGHT: (C)1993,JPO&Japio
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