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| Bending Brass into a Ring |
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| raynerd:
Hello I`m struggling trying to bend a 180mm length, 20mm wide by 1.5mm thick half hard brass into a circle. I`ve calculated that the diameter of the circle formed will be 57.3mm so I`ve made a metal former and I`ve tried to bend the metal around that. The problems I`m having are: 1. The very ends are not bending properly, they are still straight when you look closely and so consequently the ends are not butting together properly. 2. There is lots of spring in the brass and so I`m struggling to even hold the two ends together. 3. Although I`ve made a former, the brass is so stiff that I can`t get it to perfectly fold around the former, I`m not strong enough. Any suggestions would be helpful. The idea is to silver solder the joint together!! Chris |
| sbwhart:
Have you annealed it ?. If not heat it up the cherry red and quench in water or allow to cool on its own, you may have to form the hoop in stages annealing between each stage, this is because brass work hardens. Stew |
| NickG:
Could try to clamp one end of the brass onto the former right at the end of the brass, in a vice or something to bend that first, then do the other end then the middle bit. As Stew says though, you might need to anneal it quite a few times. |
| picclock:
You could try rolling the brass between two cylinders of different diameter - but would still probably need to be annealed. The tighter the force holding the cylinders together the more it will bend. Just keep rolling until the required diameter reached. This will round the ends that you are having trouble with, although it will mean lashing something up to do it. Best Regards picclock PS love the clock thread |
| timeone:
anneal it first bend it round the former than clamp it ans solder you could even put it in the lathe and take a cut or 2 to get it right |
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