Metal Pipe Forming Using Underwater Shock Wave Available to Purchase

Recently, many metal pipes have been manufactured and used as various mechanical parts. Cross section of these parts has circular and oval shape. And then, a lot of kinds, but a small quantity production of these metal pipe increases. However, commonly, very expensive metal die are used in that case. Therefore, we considered the metal pipe forming method so that we can obtain the required deformation shape of metal pipes using the underwater shock wave generated by underwater explosion of explosive. We did some experiments of the metal pipe forming by that method. We used detonating cord as the explosive. The metal pipe and explosive was submerged into water and the detonating cord was detonated by electric detonator. We made some experiments by changing the explosive set-up position and inside the metal pipe filled with water, soil, air, and so on. In this paper, we have discussed these experimental results. And then, we have done the numerical simulation to this method and those results are also discussed.