| 摘要 |
PROBLEM TO BE SOLVED: To provide a press-forming machine capable of preventing the overload of a driving source at the center part, where the largest load is applied and always keeping a pressed plate (movable die) in a desirable positional relation to a fixed plate (fixed die) during the press formation. SOLUTION: This press forming machine is provided with: three or more driving shafts for pressing a plurality of pressing points; and a displacement measuring means for measuring displacements at the respective pressing points. The central shaft among the plurality of driving shafts has a play (gap) with a press plate larger than that of other shafts. During press forming at a trial stage, positional displacements near pressing points are measured by the displacement measuring means, and the pressed plate is driven by supplying control data to each driving source for driving the driving shaft so that the whole pressed plates keep to a prescribed displacement position. Then, the actual press formation is performed based on this result. Therefore, the driving source at the central part can be prevented from being overloaded with the gap in the driving shaft. COPYRIGHT: (C)2005,JPO&NCIPI
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