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Registered Member #125
Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi all,
In the last few weeks I have been working a little with metal spinning, and here are the results of many hours of mandrel making and spinning. The small toroid measures 90mm*30mm, and the big one 195*50mm, and of course they are made of copper…
The small ones:
The big one:
A little movie of me spinning one of the small ones, but the procedure is wrong, so the metal never was tightened proper on the mandrel. A movie with the bigger toroid is uploaded tomorrow.
More pictures of my mandrels and spinning procedures are uploaded tomorrow.
Too bad my H-bridge is at Finn Hammers place, I would have enjoyed showing some pictures of my PLL SSTC with one of these toroids…
I always enjoyed making things in metal, but this beats it all!
Registered Member #599
Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Looking good. Metal spinning is actually quite easy when you have right equipments. I have done several mototorcycle part with that technique from brass and aluminum. Be very careful with your pressing tool.. it will make serious damage if you accidentally slip it to lathe chuck. (been there done that.. )
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
Very nice. Try making some bigger ones if you can and then start selling them, especially around Here, By the way If you start making 4x12" ones and aren't 200$ a pop I'd be up to pay ya, and so would everyone else. haha Very nice work though!
Registered Member #160
Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Very nice Daniel! What thickness copper did you use? and what did you make the spinning shape from? I think you've got yourself a little side business now!
Registered Member #480
Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
Daniel -
Very, very nice. I can't see from the photos, but I assume the male form tools are aluminum? In the USA, for small quantities of spun parts form tooling of hardwood (maple) is frequently used. Your aluminum tooling (if that's what you used) should last forever.
In the short video it looks like you are spinning "dry", with no visible lubrication. Was any type of lubricant used?
Are the open faces of the two shells simply butted together, or have you made a reduced-diameter "lip" on one shell that enters the opposite shell to center them? I've seen John Freau's videos of his toroid-spinning operation, it seemed that forming the reduced-diameter lip was by far the most difficult part of the operation.
One last question: was there any "magic" involved with the tip of your forming tool, or just a hardened & polished full radius?
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DIY spun toroids
). Well, atleast if the price was right, that is.
)
