| 摘要 |
<p>PURPOSE:To improve the yield of rolled product by narrowing the gap between rolling rolls when front and rear end parts are passed, enlarging into a prescribed gap when a middle part of the material to be rolled is passed and also fixing the roll gap of the final rolling. CONSTITUTION:To a target thickness from the first rolling of the material 1 to be rolled, the set value of the gap between the rolling rolls 2, 2a with which the front and rear end parts of that material 1 to be rolled are rolled is varied. As the result, the difference of the gap between the rolling rolls 2, 2a in the rolling of the front and rear end parts and middle part of the material 1 to be rolled can be decreased. At the time of the final rolling of the material 1 to be rolled, the gap between the rolling rolls is fixed. In this way, because many of the front and rear end parts of the material 1 to be rolled is made into the target thickness, the yield of rolled products can be considerably improved.</p> |
