Ishikawajima-harima Heavy Industries Co., Ltd.

Kouji Shirakawa

Hiroaki Kuwano

A control unit of hydraulic pinch rolls comprises: position detectors that detect position of right and left cylinder pistons ; an arithmetical unit that calculates a difference of output from the position detectors; a controller that processes a calculated value to make correction output; and add-subtract units that add/subtract the correction output from the controller such that the correction output is added to an end portion of the pinch rolls having a wider gap in a direction to push the gap and the correction output of the same amount is subtracted from the opposite end portion, by which the set values of pressing force control provided for right and left independently are corrected. Thus, a defective winding shape can be suppressed.

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Yokohama, Japan

Kouji Shirakawa