Tandem press line, operation control method for tandem press line, and work transfer device for tandem press line

摘要

A rotating speed of a main motor ( 61 ) of a second press ( 3 ) is regulated so that an angular difference between a press angle of a first press ( 2 ) and a press angle of a second press ( 3 ) is constant. Further, when the work is carried-out from the first press ( 2 ), a work transportation device ( 10 ) is controlled based on a press angle of the first press ( 2 ). When the work is carried-in into the second press ( 3 ), the work transportation device ( 10 ) is controlled based on a press angle of the second press ( 3 ). Further, when the work is transported, the work transportation device 10 is controlled based on a signal from a transportation device control section ( 31 ) for controlling the work transportation device ( 10 ). The arrangement above improves production efficiency in press forming and reduces maintenance cost and frequency.