Welding tiny beads on a tinier wire ?

Sep 21, 2006 3 Replies
L

Hi,



Does anybody have an idea just how I could weld a metal bead on a metal wire ?



The wire has 0.25 mm in diameter, the bead is about 4 mg or 0.8 mm in diameter.



The challenge is to center the bead on the wire - if the bead is not exactly centered, it will fall down once I heat the wire.



Usually, the bead material will have a much lower melting point than the wire, so in theory, I can use some alumina plate to hold the wire in place whilst melting the bead on it. For some reason, the bead never centers.



Any ideas ?



Thanks !



Robert


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G

Crimp the bead (or swage it) on first, so it won't move?

GWE

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B

Sounds like an ideal task for a CD welder, normally used for welding thermocouple wires together. A Google search should throw up a number of options, or maybe DIY. I have a couple of brochures from companies that make such welders if you get stuck. I would fetch them right now, but they are hidden in a box somewhere.

Barry Lennox

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