| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To heat steel plate edge parts using an induction heating device provided on the inlet side of a rolling mill as preparation for rolling, while considering heat removal amount in the edge parts between the induction heating device and the rolling mill. <P>SOLUTION: For the steel plate edge parts Sa, Sb, heat removal amount by a coolant, heat removal amount by air cooling on the way of conveyance of the steel plate from the induction heating device 5 to a first rolling stand 6a, heat removal amount by heat conduction from the edge parts to a steel plate center part and heat removal amount by contact of the steel plate S with a roller 10 for preventing meandering or the like which is provided between the induction heating device 5 and the first rolling stand 6a are each calculated and the sum total of them is taken as the gross heat removal amount. The temperature target values Thout* on the outlet sides of edge heaters are calculated on the basis of the target value Tr* of the formed turning tool temperature in the first rolling stand 6a and the amount of temperature drop corresponding to the gross heat removal amount, and power supply to edge heaters 5a, 5b is calculated so as to perform temperature rise equivalent to the difference between the temperature of the steel plate S on the inlet sides of the edge heaters and the temperature target value Thout* on the outlet sides of the edge heaters. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
