| 摘要 |
<p>PURPOSE:To reduce the degree of steep slope of a steel strip recoiled from a cooled coil, by controlling an intercepting width and an intercepting time by calculating the water injection cooling of the side edges of a hot rolled steel strip at the outlet side of a finish mill, basing on the temperature, dimension, and components, etc. of the strip. CONSTITUTION:Before coiling a hot rolled steel strip W rolled out from a finish mill 1 by a coiler 3, the strip W is cooled on a cooling table 2 to the prescribed temperature by pouring a cooling water from nozzles 6 of lower cooling headers 4, 5. Temperature detecting devices 9, 12 are respectively provided to the inlet side of a coiler 3 and to the outlet side of the mill 1 to output the detected temperature signal of the strip to an arithmetic device 10. At the device 10, the ratios of an intercepting width to the strip width and a cooling water intercepting time to the whole water cooling time are respectively calculated so as to obtain the optimum values for reducing the degree of steep slope of the strip W, basing on the informations about the dimensions and the components, etc. inputted from a computor 13 and the data of operating conditions; thereby controlling baffle plates 8A, B of cooling water, which reciprocate parallelly on rails 7 by a driving mechanism 14.</p> |
