Science and Technology of Energetic Materials

Vol.73, No.4 (2012)

Research paper

Explosive forming techniques for making a copper plate relief
Kazumasa Shiramoto, Akihisa Mori, Takumi Watanabe, Koji Hisanabe and Masahiro Fujita


On the explosive forming process, a metal plate is formed by colliding with a die at a high velocity, so that the delicate figure of the die surface can be formed on the metal plate as it is. This excellent forming performance is considered to be very suitable for creating art works. The authors tried to form a copper plate into fish as it is, by means of explosive forming process. The present report represents the explosive forming process and shows some experimental results. In order to succeed in the explosive process, it is important to make the die skillfully. The important point of the die used for the explosive forming is as follows :
(1)The die must have adequate strength against impulsive loading so that the die may not be destroyed with the collision of the metal plate.
(2)The whole shape and the delicate scale figure of fish are precisely reproduced on the die surface.
(3)The shape of the die must be designed in order to prevent the breakage of the metal plate.
After several tries and errors in the experiment, successful results were obtained. In this paper, experimental results were presented including the failure experiments.

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explosive forming, underwater shock wave, underwater explosion

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