| 摘要 |
PURPOSE:To efficiently obtain a deformed cross section strip sheet excellent with good yield and without any burr, etc., by passing the metal strip sheet to be rolled with its superposing between the work rolls on which grooves are formed in the circumferential direction of the barrel part and peeling off the metal sheet to be rolled after rolling it at a specified draft. CONSTITUTION:A plate lime metal strip sheet 1 to be rolled is passed in the state of its being superposed more than two sheets through the work roll 3 on which a groove 3a is formed in the circumferential direction of the barrel part. The metal strip sheet 1 is formed with a stepped part corresponding to the part where the groove 3a exists and the part where no groove 3a exists and a deformed cross section strip sheet 2 formed with the stepped part in respect of the width direction of the metal strip sheet 1 is formed. Also the rolling is executed at less than 30% draft of the plate passing between work rolls 3 of one time of the strip sheet 1 passed between a set of opposed work rolls 2, so the strip sheet 1 does not become a clad steel even in the case of its rolling in the state of its being superposed more than two sheets. |
