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#21
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I'm sure it's an art with a huge learning curve but the operators of these lathes make it all look so easy. I don't have the right tools although I do have a mini metal lathe, maybe I could start with that, or most likely I'm out to lunch thinking that way. The light fixtures I've been making have mostly been rectangular , making the round pieces by hand takes a ton of hammering, reshaping, heating, hammering again as you can imagine, I think a spinning lathe is definitely in my future, Thank you for the inspiration.
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Ken Peterborough, Canada |
#22
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hi Ken.
i sense you are leaning towards spinning to shape your objects. pls bear in mind spinning only works for "round" shapes. of course you can spin a basic round shape first and then hammer it into other shapes later. but keep in mind you have to make a mold, either in wood or other materials, first before you can start spinning...so not sure if its worth the trouble for one-offs or very limited runs. as many here has mentioned, shaping by hand with hammers and stakes is the simplest way to get started. only problem is the sharp learning curve when starting. but the time spent learning will be well rewarded when you realize you can shape fantastically complicated shapes with VERY few and basic stakes and hand hammers. i personally have learnt spinning (very crudely) because of the ease to make quantity runs but my first pleasure is to shape metal by hand with hammers and stakes. but to focus in on your question, have you considered "constructing" your rectangular shape rather than "raising" it? you can easily solder a rectangular shape together, using a bevelled solder joint to hide the seam? a well made bevelled solder joint would be close to invisible. hope my 2 cents was worth your time.
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Lee. If it itches,......you just got to scratch it! Last edited by leoitch; 03-16-2020 at 02:26 AM. Reason: clarification |
#23
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I smoothed out my hammer and dolly. These actually create a larger surface area, thus stretching the metal. |
#24
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I think the theory is that at point of impact on the tuck, hammer and dolly momentarily grip metal as tuck closes.
IMHO just make a mess of surface and nothing else happens. Bought a pair by Snap on, cost me a fortune. For years, thought it was me being rubbish, which I probably am, but I now know, years later post Internet, they dont work and I removed all lumps and bumps. I thought "Snap On" - must be good!!
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Richard "Everything is in the system, if it aint working, the system aint right" |
#25
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http://www.jamesriser.com/CD_Preview/Intro.html
An excellent place to start
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Karl Heinz |
#26
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Richard, Pugsy, thanks for your comments I never own a shrinking hammer/dolly and to be honest don't see myself ever trying to learn to use them on thin copper, I suppose they might be useful for occasional panel shaping/autobody work but it's good to know they should not be considered for the type of work I'm doing anyway. Quote:
Soldering shapes together is how it all started for me , the problem with soldering formed pieces together is, they can easily fall apart , it works fine if the project is soldered to completion but any further re-soldering new pieces (when reheating is involved) can and will loosen the old joints . my solution has been to use copper rivets where I can or a combination of soldering /riveting joints. this approach has worked much better so far. Metal spinning seem to be my next step , I'm excited to explore this process (and learn) , the things I always imagined beyond my skills and my limits are now more possible. Please don't stop sharing your thoughts, I hope to see more comments ,it seems like I can't get enough .
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Ken Peterborough, Canada Last edited by ken from Peterborough; 03-16-2020 at 09:55 AM. |
#27
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Ken,
sorry for not being specific...but i was thinking of brazing. and you can get silver solder for brazing at different temperatures. i know of at least 4 different grades - hard, medium, easy and extra easy. try this for example: https://www.riogrande.com/product/si...20-ga/101100gp
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Lee. If it itches,......you just got to scratch it! |
#28
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Have tried Silver solder (Very easy wire) and went smoothly with MAPP and O/A torch .
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Ken Peterborough, Canada |
#29
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I bought a used rotary machine with tools and several templates. I studied on Saturdays. Over time, something started to come out. Recently, I made an air filter housing for GAZ-67. However, I had to commission the biggest element.
https://photos.app.goo.gl/4264kgJ5t6qxd8VN8
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In the morning I was convinced that this was the only solution. Witold https://photos.app.goo.gl/VTz6ETWQhnKyqUQYA https://www.youtube.com/watch?v=hzcKlFjOAoE http://forum.poziome.pl/index.php?topic=1989.0 |
#30
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The air filter housing looks awesome, great work, thanks for posting it.
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Ken Peterborough, Canada |
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