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Explosion Welding

Joining process where two metal sheets are welded together by the heat and pressure created by an explosive which is detonated above the upper plate.

Illustration of Explosion Welding

The process

Two plates, the upper one is usually a cladding plate, laid on each other with spacers [1]. The upper plate is then covered with an explosive [2] with a detonator connected to it. Activating the detonator causes an explosion along the length of the workpiece.

This results in the upper plate being pressed down against the bottom of the common contact point [3] at a very high speed, so that the sheets are fused together. The contact point move at the same speed and direction as the detonation, when the explosive is fully consumed, the plates are completely joined.

The plates must have a relatively simple design to be compatible with this process. At the sides, the plates may bulge a little, and in cases where a small weld is desired, post-processing in the form of grinding is applied.