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| RussellT:
This is my first attempt at metal spinning (not counting the one 10 minutes before this where I overdid the annealing and the metal went too soft :doh:). I have a car radiator which is leaking from the join with the filler neck - I've soldered it once and a professional has done it once and it's leaking again. This time the rest of the radiator is a bit tired so I plan to get it recored. I want to try and stop this leak properly and I think a flange that bridges the joint might give it sufficient extra strength. Here's a picture of the filler neck. In spite of the bracing piece it cracks the solder underneath the neck. I could turn a flange from a bit of bar but I haven't got any and it would be expensive. I have got some brass sheet though so I thought I'd try metal spinning. Here is the setup to try it. The former is from the scrap box (a collet chuck which I took too much off). The brass sheet has been fitted to it with a hammer and a jubilee clip. I drilled it in the lathe. This is the lever arrangement. The toolholder isn't clamped to the toolpost and the toolpost has been oiled. The bar has a rounded end from a test of a ball turner. The bar is just resting on the toolholder slot. This is the result. It took much less force than I expected. I annealed it twice. And here it is parted off and cleaned up. I'm encouraged by this experiment - it didn't feel like I was abusing the lathe much - and the result was OK. The next step is to make a former the correct size. |
| rythmnbls:
I've done a little bit of spinning. One tip I was given was to use a small ball bearing mounted on the toolpost as the pressure point. Here's a couple of pics, material is 316 stainless... Regards, Steve. |
| ieezitin:
Nice job... look forward to the repair with interest. Anthony. |
| ieezitin:
yo.. i looked through your complete library of the turbine you built.. you ought to think about publishing the build on here looks rather interesting. Anthony. |
| rythmnbls:
Thanks Anthony, I did a build thread on HMEM a year or so ago, I assumed that most of the modding / machining community had seen it as I see participation by the same folks on all these sites. Here's a link http://www.homemodelenginemachinist.com/showthread.php?t=17433 Apologies to Russel for the hijack :) Regards, Steve. |
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