Patent Number: 6,305,206

Title: Reversible rolling method and reversible rolling system

Abstract: A pass schedule calculation apparatus calculates pass schedule and inputs the schedule to a preset apparatus which is plate thickness control means. The present apparatus controls a draft motor before rolling to set an appropriate initial roll clearance, and instructs a control target value to a plate thickness control apparatus and rolling speed control apparatus to perform control. A method of determining the pass schedule comprises: obtaining a product of a function which includes a pass rolling parameter and has a correlation of monotonic increase with respect to each pass draft amount, and another function including a rolling parameter which increases with the number of passes; using the product of the functions as a function substantially independent of a rolling speed; solving optimization problem of the parameter for equalizing the function value in the respective passes to calculate each pass draft amount; and using the draft amount as a draft schedule to determine the rolling pass schedule.

Inventors: Kobayashi; Yujirou (Hitachi, JP)

Assignee: Hitachi, Ltd.

International Classification: B21B 37/16 (20060101); B21B 1/32 (20060101); B21B 1/30 (20060101); B21B 1/34 (20060101); B21B 041/06 ()

Expiration Date: 10/23/2018