Hi everyone,
a former colleague of mine has been working with EOS a lot:
https://www.eos.info/en
I’m not an engineer, but could Direct Metal Laser Sintering in principal be a
possible way to make a bike frame?
We may not be able to purchase such a machine, but if we can get someone in the
company interested…
Kind regards,
Max
On 22.08.2017, at 16:43, Dirk Bonne <dbonne@xxxxxxx> wrote:
May be a the happy owner of a printer could make a inner lug and try to join
3 tubes together? :-D
Gesendet: Dienstag, 22. August 2017 um 15:19 Uhr
Von: "Dirk Bonne" <dbonne@xxxxxxx>
An: python@xxxxxxxxxxxxx
Betreff: [python] Aw: Re: 3D printing
Hi Philip
My idea was to be able to provide "python kits".
1) A designer would provide a list of tubing (sizing and length) + files to
print kind of "inner lugs".
2) A builder would get the tubes and cut them to length.
3) Then she would print the lugs. These lugs would then act as connectors for
the tubes.
The lugs were to fit *into* the tubes. These lugs would not give strength. It
would just make hold the tubes in the correct place. The builder would then
need to use epoxy and carbon fiber to strengthen each joint. As a sidenote,
you can get carbon fiber in tape rolls (they are not weaved).
Advantage would be that with minimal workplace/tools somebody would be able
to make a bike. Furthermore one could provide the tubes and lugs further
making building accesable for the builder.
I have no tried it in practice because I had trouble getting access to a
printer.
greetings dirk
Gesendet: Montag, 21. August 2017 um 20:25 Uhr
Von: "Philip Hahn" <hahnpv@xxxxxxxxx>
An: python@xxxxxxxxxxxxx
Betreff: [python] Re: 3D printing
As much as I love the idea - as someone who both cycles as a primary vehicle
and has melted 10+kg of plastic in his printer over the last year - this will
not be a robust or safe idea in any available plastic. The deposition of
layers in the X-Y plane results in weakness in the Z plane, highly
susceptible to both shear and tensile loading. Think of it as separate
laminations which have a weakness in bonding between laminas.
I would suggest perhaps that idea of tubes and connectors aimed at the CNC
community. Homebrew hobby CNC machines are built for under $1000 or about 3x
the cost of a decent printer. They are driven by the same gcode so you can
prototype on your printer and then make metal parts with the same code. I'm
currently working on such a CNC conversion at the moment.
philip hahn
On Mon, Aug 21, 2017 at 11:17 AM, Jürgen Mages <jmages@xxxxxx
<mailto:jmages@xxxxxx>> wrote:
I think, it is about time to reanimate an idea, made by Dirk Bonné in 2011:
The 3D-printing of a python frame. I guess, the printing technology has
advanced in a way, we can seriously start to work with it.
Thus I have set up a wiki page:
http://en.openbike.org/wiki/3D-Printing ;
<http://en.openbike.org/wiki/3D-Printing>
Here we can gather all useful information and hopefully one day the first
prototype will be made.
Everybody interested is invited to contribute ...
Cheers,
Jürgen.
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