| 摘要 |
PURPOSE:To make it possible to trace and control welded parts of metal strips in a continuously processing line in which the ends of a plurality of coil strips are successively welded together, by correcting tracking errors with the use of the correlation between the measured thickness values of the metal strips on the inlet side and outlet side of the line. CONSTITUTION:For example, in a continuous annealing line, detected thickness data on the introduction side at every predetermined transferred distance in each area, from a double cut shear and a welding machine to an inside loop car, up to the outlut thereof, in a continuous annealing furnace, to an outside loop car outlet and thereafer, are stored. The stored values of memory devices 21a through 21e in the areas are stepped up at every index due to the outputs of the associated speed meters 8, 14, 16, and the end addresses are shifted to the associated addresses in the next areas in accordance with the expansions and retractions of the loop cars. Further, by comparing the measured thickness value on the carrying-out side with the stored value on the introduction side, a tracking error is corrected if the correlation is broken. Thus, the information on welded parts or the like may be traced with a high degree of accuracy. |
