| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.43 ( October 2000 ) Automative Materials and Instrumentation and Process Control ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| New Technologies for Connecting Process Lines
by Means of Air Floating Helical Turners Yoshun Yamashita, Tadaaki Yasumi, Masato Iri |
| Synopsis: At the No. 1 Cold Rolling Mill in the Chiba Works, Kawasaki Steel, we have successfully connected a continuous annealing line, the No. 2 CAL, and an existing skinpass mill using two sets of air floating helical turners, because the center lines of the two process lines did not coincide with each other. Furthermore, we have installed new finishing equipments. Air floating helical turner was the first in the world of its kind. In achieving non-touch uniform levitation, we have solved various problems that had not been experienced with conventional floaters floating control by devising various technologies including optimization of the nozzle design and even floating control. Furthermore, for high-speed processing of thin strip, we have renewed inverters for helper rolls of the annealing furnace and achieved high accuracy in the tension control. In addition, in relationship to strip surface quality, we have improved the defect-free skinpass method at weld lines. |
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