Framebuilders - Making headbadges
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12-04-09, 01:36 PM
Hey, this subforum may not be the right place for this, sorry, but I figured you guys would know out of anyone. I'm interested in making headbadges and I have a couple ideas of how to start, but I want to know if anyone has any experience or recommendations. I was looking at using stainless steel and sort of following this: http://www.headbadges.com/id75.html at least with the soldering different layers together. I guess I'm just trying to figure out what a good gauge would be to use and if I'm about to do anything horribly wrong. I was going to pick up some jewelry files and a saw and get to work. It looks like the metalworking shop has 0.012", 0.018", 0.023" and 0.028" sheets. I was thinking of going with the thickest. I think the framebuilder wants to braze the headbage into the frame rather than attach with rivets or screws.
It would seem to be a mater of what pleases the eye. Compare hand change thicknesses for heft and appeal. Whatever looks good is good. Limitations would be what you can bend or forge into the shape of the tube. Also if you intend to braze it to the bike, keep in mind the titanic amount of heat that could be required to get it attached to a possibly thin tube. That and the desire to paint under the badge may account for why people pin them on in some cases. Same issue if you are brazing them together. While you can play with various issues around braze melting temps and remelting temps (often higher), A really thick piece and different layers may make for tricky final brazing.
12-05-09, 01:59 AM
won't the heat from brazing melt the solder?
While decals aren't "old school" they do look clean, especially UNDER paint (if you are going to paint and clear your frame)
most of the badges I have seen have been a combination of embossed and enammeled brass. I imagine there are companies out there that do this but if you want it for a 1 off bike you may have to do it by hand. This means getting a thin sheet of brass from the hobby shop and cutting the outlined shape out. Then prime and hand paint your design onto it then pin it to the head tube. Another technique would be to tool copper. Get a thin sheet of copper from the hobby shop and cut your design onto it. Use tools to press a relief design into the soft copper. Then role the badge into a radius that fits the head tube. Finally enammel it with glass. Coloured glass powders are sifted onto a specially primed surface then heated to melt the glass.
"won't the heat from brazing melt the solder? "
I would see that as an issue, but everything else being equal solder releases at higher heat than necessary with the initial application. And you could theoretically use solders with different melting points like 45 and 56 silver, or brass and later silver. However, you can also end up with the badge application being a much higher heat deal than the application of the layers, depending on the thickness of parts etc... I have never done one so those are just issues I would be wondering about while doing them, There are solutions to everything.
01-07-10, 11:32 AM
My 2 cents....
Apply the finished badge OVER paint/powdercoat using automotive emblem adhesive.
A little brass detail was added to PastorBob's "Sporty" using this and so far, so good.
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