Abstract

Explosive forming is one particular forming technique, in which, most commonly, water is used as the pressure transmission medium. In recent years, we have done the development of the method which obtains a necessary form of the metal by the control of underwater shock wave acts on the metal plate, without a metal die. On the other hand, the pressure vessel is required in various fields, but we think that the free forming using the underwater shock wave is advantageous in the production of pressure vessel of a simple spherical, ellipse, parabola shape. In this paper, we will introduce an experiment and several numerical simulations that we carried out for this technical development.

Highlights

  • We have been researching a metal forming using underwater shock wave

  • This numerical simulation is done using our self cord based on the finite difference method [3]

  • These parameters were changed in the numerical simulation

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Summary

INTRODUCTION

We have been researching a metal forming using underwater shock wave This method is called an explosive forming by causing the underwater shock wave is generated by underwater explosion of an explosive. Without using the metal die, the forming method with only the overhang the metal plate is called free forming. It is possible the regulation of the pressure strength, pressure distribution, action time to the metal plate of the underwater shock wave by changing the distance between the explosive and the metal plate and quantity of the explosive. The pressure vessel is required in various fields, but we think that the free forming using the underwater shock wave is advantageous in the production of pressure vessel of a simple spherical, ellipse, parabola shape. We will introduce an experiment and several numerical simulations that we carried out for this technical development

EXPERIMENTAL PROCEDURE
NUMERICAL SIMULATION
SIMULATION RESULT
CONCLUSION
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