| 摘要 |
<p>PURPOSE:To shorten kickout and to uniformly cool the top and bottom surfaces by arranging high-pressure water jetting nozzles whose jetting directions are taken as the opposite side of a rolling mill in the top guide of the rolling mill and respectively using at specified pressures at the times of cooling and descaling. CONSTITUTION:The high-pressure water jetting nozzles 1a, 1b, 2a, 2b whose jetting directions are taken as the opposite side of the rolling mill and their headers 3, 4 are arranged in the top guides 13 of rolling mill on the front and back sides of rolls 6 of a finishing mill and pressure controlling means are provided on the water jetting nozzle headers 3, 4 on the inlet side of the top guide 13. At the time of cooling, plural headers 3, 4 are used at a pressure of >=30kg/cm<2> and, at the time of descaling, only the headers 3 nearest to the rolls 6 of the rolling mill are used at a pressure of >=150kg/cm<2>. The headers 3, 4 are housed in the top guide 13 of rolling mill, so cooling in a short time after rolling and shortening of kickout length are enabled and further the devices are protected from the camber of the rolled stock.</p> |
