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Foil explosion welding. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / welding equipment

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Two glass tubes can be welded with a small piece of foil. Here's how it's done.

The foil is placed between two pieces to be welded, which are pressed against each other. Then an electric current is passed through the foil so that it gradually increases. For some microsecond, the foil will heat up, melt, and when it reaches the boiling point - at the moment of evaporation of the material from which the foil is made - an explosion will occur. He will connect the parts: the metal of the foil will adhere so firmly to their surfaces that you cannot tear it.

With this welding method, it is possible to join materials that cannot always be welded in the usual way. Foil will help, for example, to weld thin-walled pipes (wall thickness up to 0,25 mm) of small diameter.

See other articles Section welding equipment.

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