Tips for distortion free fillet brazing?
I've been doing a fair bit of fillet brazing recently, and while I'm pretty pleased with my progress on the whole, I'm struggling to get perfect distortion free results.
Firstly, am I asking too much? Is a small amount of distortion simply an inevitable part of the process, and if so, what sort of tolerances are deemed acceptable?
Obviously there are a number of variables involved when discussing possible causes Eg Mitre tolerance/torch temperature/heat distribution/length of heat cycle/tack and build sequence etc and any distortion is likely the result of a combination of small errors in a number of these areas, but does any one of these (or something I haven't mentioned) stand out as critical?
Heatsinks are always an option, but I'm not convinced they're necessary for brass fillets, and I'd far rather get the technique nailed watertight than end up relying on the heatsink 'crutch' (I appreciate they have their uses in certain circumstances though)
Greatly appreciated as ever :)