METHOD FOR WATER COOLING STEEL PLATE IN CONTROL ROLLING

摘要

PURPOSE:To uniformly cool effectively a steel plate on a table roller by controlling the rotating direction and speed of the table roller according to the positive and negative and value of the random function generated on each optional time from a computor. CONSTITUTION:The temp. of a rolled steel plate 2 is measured by a radiation type thermometer 18 and in case of this measured value being higher than the temp. of rolling re-start, the steel plate 2 is fed to a water cooling zone 4. Simultaneously with starting a water cooling on receipt of the signal of an inlet side position detector 6 a computor 10 generates a random function every three seconds and rotates normally and reversely the table roller 5 according to the speed corresponding to the value of function. The temp. is measured after cooling for the set time by the thermometer 8 and the rolling is re-started if reaching the prescribed temp. The steel plate excellent in the plate thickness accuracy is obtainable because of the generation of a shower mark and roll mark being able to be prevented by cooling like this.