- high end alloy frames..how do they get the smooth welds?
They either grind them down or put a smidge of filler over the top (but that could be just as lengthy a process – fill, set, sand, stopper etc.). A lot of car bodywork repairs are welded then ground down, so it's not that unlikely when you're paying big money for a frame.Posted 8 years ago
Reasonable quality welds..
But welds don't really need to protrude to be full strength, if they're done correctly – the additional material doesn't add much. Incidentally it'd be fairly cheap and easy to set up a robot to grind welds back in a matter of minutes per frame.Posted 8 years agoRubins4Member
As far as I'm aware, welds that protude to a significant degree are not as strong as they should be (ie poor welding. From my experinece, the weld should blend into the original material to produce a junction that is stronger then the original material. If the weld is just sitting on the surface, the weld hasnt fused properly with the material.Posted 8 years agoMacavityMember
Before Cannodale effectively went bust in 2003 (chapter 11) they did sand the welds, with an airdriven beltsander.
"Hand-Finished Welds. The beautiful welds on every Cannondale frame are hand-sanded to eliminate stress risers. The elimination of stress risers allows us to use lighter, thinner tubes without compromising the strength of our frames."
What they do now is a mystery, possibly even to Cannondale.Posted 8 years agoMacavityMember
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