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Posted by Stupendous Man on July 16, 2008, 1:27 am
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I am considering making some parts from 4130 streamline tubing, (the
smallest, .030 wall) and would like to bend it into gentle curves. It looks
like sand bending may be the way to go.
Has anyone done this? What method did you use?
I'm not using it for aircraft, so it doesn't have to retain all of it's
strength, but I don't want any crushes.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty
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Posted by Jon on July 16, 2008, 10:04 am
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you might consider making a roll former...
>I am considering making some parts from 4130 streamline tubing, (the
>smallest, .030 wall) and would like to bend it into gentle curves. It looks
>like sand bending may be the way to go.
> Has anyone done this? What method did you use?
> I'm not using it for aircraft, so it doesn't have to retain all of it's
> strength, but I don't want any crushes.
> --
> Stupendous Man,
> Defender of Freedom, Advocate of Liberty
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Posted by Maxwell on July 17, 2008, 3:57 pm
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Some other sources, and possibly different but related alloys.
http://www.kindt-collins.com/catalog_pdfs/88-89.PDF
http://www.freemansupply.com/DuplicatingWhiteMe.htm
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Posted by Bob La Londe on July 17, 2008, 4:10 pm
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> Some other sources, and possibly different but related alloys.
>
>
> http://www.kindt-collins.com/catalog_pdfs/88-89.PDF
Now that is some cool stuff. The immediate thing that comes to mind is
making two (or more) piece molds. Use two different melting point alloys.
Pour the hotter one first. Drill in alignment pins, spray with a non stick
agent, and then pour the lower temp over the blank and first piece. If you
have any issue with pouring you can just machine in some vent grooves in
either piece afterwards. Because both are relatively low temp alloys you
could hand carve your blank out of wood, or even piece it together and just
glue the pieces to make your blank. Need a smooth surface? Just over pour
the first piece and mill flat before pouring the second piece.
> http://www.freemansupply.com/DuplicatingWhiteMe.htm
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Posted by Bob La Londe on July 17, 2008, 4:12 pm
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>>
>> Some other sources, and possibly different but related alloys.
>>
>>
>> http://www.kindt-collins.com/catalog_pdfs/88-89.PDF
>
>
> Now that is some cool stuff. The immediate thing that comes to mind is
> making two (or more) piece molds. Use two different melting point alloys.
> Pour the hotter one first. Drill in alignment pins, spray with a non
> stick agent, and then pour the lower temp over the blank and first piece.
> If you have any issue with pouring you can just machine in some vent
> grooves in either piece afterwards. Because both are relatively low temp
> alloys you could hand carve your blank out of wood, or even piece it
> together and just glue the pieces to make your blank. Need a smooth
> surface? Just over pour the first piece and mill flat before pouring the
> second piece.
>
Geez, and the obvious... If a mold becomes outdated you just melt it down
and use the material again.
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>smallest, .030 wall) and would like to bend it into gentle curves. It looks
>like sand bending may be the way to go.
> Has anyone done this? What method did you use?
> I'm not using it for aircraft, so it doesn't have to retain all of it's
> strength, but I don't want any crushes.
> --
> Stupendous Man,
> Defender of Freedom, Advocate of Liberty