Blooming rolling method

Abstract

Abstract PURPOSE:To improve rolling yield, by inhibiting fish tail extending in the bottom direction and by reducing cut-off portions by adding dummy pass to pass to a bottom from a top of steel ingot in rolling pass schedule at suitable times. CONSTITUTION:A bottom of steel ingot 1 discharged from a soaking pit is detected by means of a position sensor 5, and a shutter of a camera 4 is released. A photographed picture is simulyaneausly scanned by means of a memory storage 6, and the picture is memorized. The memorized content is put out to a shape recognition device 7, and the maximum width, wall-end width and wall height of the bottom of steel ingot is measured. The shape element is converted into the best dummy pass number decision device 8, and rolling pass schedule is calculated by means of a pass schedule set device 9. The schedule is transmitted to a rolling reduction set device 10 of mills 2, 3 every pass, rolling reduction positions are varied each time and the steel ingot is rolled up to final pass.

Inventors

• 👤 Tamao Yokoi

Bibliographic Details