Hello Lorraine again!
Now there have been lots of replies and help but they all miss the
point, theres a much easier way to solder up round heavy bangles no
matter what the metal. as your a trier ill break one of my rules AND
As every one has said you need the right sized torch, youll have to
go to a welding supply place and buy a proper engineers torch that
uses oxy and propane. dont mess about with amateur kit torches.
now the next bit of kit.
you need to make a jig in the shape of a “U”, from wood will do, ive
egineered mine out of metal, out of some 2in by 2in not less !!. some
6 in high with 6 to 8in in between the 2 "U"uprights.
1in down from the top you drill a 1/4in hole from the side inwards.
in both uprights.
through these holes you put a just smaller than 1/4in rod with a say
a 1/2in concave copper cup fixed to it.
through the rod on the outside of the “U” is a hole into which you
hook 2 suitable springs which pull the rods inwards till the 2 cups
touch in the middle of the “U”. these are hooked over a couple of
screw eyes in the side of the wood.
So what you have made is a spring loaded jig to hold the bangle
whilst you solder it, but theres more which is just a important you
dont apply the solder after heating, you put it inbetween the 2 ends
of the bangle!! as a paillion.!! flux all over, heat and the spring
tensions pushes the bangle ends together making a perfect joint. Done
thousands like this. you change the springs for lighter bones for
lighter bangles and also use this jig to solder up rings made from
multi strand wire.
Await your results