多点プレス法による船体外板の曲げ加工に関する基礎的研究

概要

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Even though lots of problems have been solved to design and make the hull structure, it is often said that one of the most important manufacturing processes is plate bending for making shape of outside plate of ship In order to make mechanical facilities for plate bending instead of thermal working such as line heating and local heat treatment, a universal-multiple-piston pressing method is the one which naval architectures have long wanted to realize. However, this method has its proper phenomenon which is well known as spring back. Therefore in this paper, a fundamental analysis specially designed for plate bending based on potential energy principal with subsiduary condition is developed, Numerical examples are shown for plate bending of cylindrical shell, a doughnut inside and doughnut outside plate. It will be concluded that this numerical calculation is applicable to a practical Plastic bending of plates by multiple-piston-pressing. In the near future, these results will be compared with experimental ones.
社団法人日本船舶海洋工学会の論文