COLD ROLLING SYSTEM CAPABLE OF COMPENSATING THICKNESS MEASUREMENT ERRORS DUE TO THE CHANGES IN SURFACE ROUGHNESS USING A PROCESS CONTROLLER

摘要

PURPOSE: A cold rolling system is provided to determine and display whether or not the thickness of a steel sheet is defective or not based on the thickness information of a rolled steel sheet using a priority terminal instead of a process controller.;CONSTITUTION: A cold rolling system comprises a cold rolling mill(100), a thickness measuring device, and a process controller(300). The cold rolling mill rolls a cold steel sheet at a target thickness with a rolling roll. The thickness measuring device measures the thickness of the cold steel sheet rolled by the cold rolling mill. The process controller receives thickness information from the thickness measuring device, and compensates the thickness information by applying a roughness compensation coefficient to the thickness information, which is for compensating the measurement errors of the thickness measuring device due to the changes in the surface roughness of the rolling roll. The thickness measuring device includes a radiation generator which generates radiation, and a detector which detects the radiation from the radiation generator. The thickness measuring device measures the thickness of the cold steel sheet according to a radiation dose detected by the detector. The process controller includes a controlling part, and a communicating part for communicating with the cold rolling mill. The controlling part controls the actuation of each component, and the rolling reduction of the cold rolling mill based on the compensated thickness information so that the cold rolling mill rolls the rolled steel sheet at a target thickness.;COPYRIGHT KIPO 2013;[Reference numerals] (100) Cold rolling mill; (310) Control unit; (320) Receiving unit; (330) Storage unit; (340) Thickness compensation unit; (350) Communication unit; (400) Upper terminal; (AA) Thickness information