| 摘要 |
PURPOSE:To improve the sheet width accuracy of a rolled stock and the yield by concretely finding an optimum press width drafting amount and an optimum edging width drafting amount when a target sheet width of a slab and a target crop length are given. CONSTITUTION:A width press 3 provided with press heads 2, 2 having respective faces whose distance between them is gradually narrowed in the width direction of a slab 1 toward the transfer direction of the slab 1 subjected to width sizing is installed in the upstream side of a rolling line. A 1st edging mill 4 provided with vertical two rolls is installed in the downstream side in the transfer direction. A 1st horizontal mill 5 having two horizontal rolls, a 2nd edging mill 6 and a 2nd horizontal mill 7 are installed in the downstream side of the mill 4. An equation 1 estimating a sheet width changing amount deltaWP and a crop length changing amount lP at horizontal rolling after width pressing and an equation 2 estimating an sheet width changing amount deltaWV and an crop length changing amount lV at horizontal rolling after edging rolling are used and doubled to find a press width drafting amount WP and an edging drafting amount WV by use of an equation 3 so that a sheet width and a crop length on the outlet side of the horizontal rolling equal to prescribed target values, respectively. |
