Charging system in the explosion welding of planar or curved workpieces

A charging system for seam welding two or more workpieces by means of explosion welding, comprising an explosive charge and an inert impulse-transmitting body located between the explosive charge and the surface of the one of said workpieces nearest said charge, wherein the surface of the inert body facing the said surface of said one workpiece is so configured in a plane at right angles to the longitudinal extension of the ultimate welding seam that the angle .alpha. between said surface of the inert body and the adjacent surface of the one workpiece varies from the center line of the inert body perpendicularly to the said surface of the one workpiece and outwards from said center line, and wherein said charge has a constant thickness and is located on top of the inert body and the charge extends across the whole width of the inert body.