| 摘要 |
<p>PURPOSE:To perform automatic conveying and positioning of billets to an induction heater in a method for heating inductively the skid-marked parts of the billets on a roll table prior to rolling by measuring the positions of the skid marks by an image processing technique. CONSTITUTION:The steel material 1 discharged from a heating furnace is conveyed in the direction of a rolling mill with a roll table 2. The material 1 and a perpendicular pole 3 alongside the table 2 near the discharging port of the heating furnace are photographed with a television camera 4 on the straight line approximately a right angle to the pole 3 and the advance direction of the table 2. The image shows the shining material 1 as it is in a heated state, the dark pole 3, and the skid park part 5 in low brightness as it is low in temp. Therefore, an image processor 8 can calculate the length l1 from the forward end of the material 1 up to the mark part 5 from the number of image line elements. On the other hand, when the material 1 comes to the prescribed position just before an induction heater 9, the detection signal of an HMD10 is fed to a control device 11 for positioning. The device 11 is inputted with l1 and the speed of the table roll and controls the motor 12 for driving the table roll 2 so as to move the material 1 by l1+L and to stop the same in said position.</p> |
