Practical studies on the plate bending work using Multiple-Piston-Pressing method

本文的研究目的是为船体外板的塑性弯曲提供一种实用的方法，而获得圆柱形、反曲形、向曲形等基本曲面是船体外板塑性弯曲的关键。因此，在船体外板的弯曲加工中，采用了多活塞挤压法。（1）测量了多活塞压头所受的外力，并求解了多活塞压头在板料弯曲时的压力分布。(2)对矩形板和方形板进行了弯曲试验，成功地解决了船体外板弯曲的一些可能性。(3)由于弯板工作的重复性，在矩形板处，板的横向挠度对板的轧制方向影响不大。

This research is to contributete to a practical method which can be bend of the outside plate of ship plastically and it is an important thing to get such a basic curved surface as cylindrical, anticlastic and synclastic type.So Multiple-Piston-Pressing metod adopted at the bending work of plateThe results of this investigation are obtained the decisions as follows :(1) The external force which act upon each Multiple-Piston-Pressing head are measured, and then solved a distributions of pressing load when the plate are bended.(2) Rectangular plate as well as square plate are experimented for bending work, which succeeded in some possibility of bending of the outside plate of ship.(3) As results of repeating of plate bending work, At rectangular plate a roll direction of the plate is not so affected for the lateral deflection of plate.