[AR] Re: Specifying Design Intent for 3D Printed Rocket Parts

  • From: Ed LeBouthillier <codemonky@xxxxxxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Thu, 29 Mar 2018 07:01:00 -0700

On Wed, 2018-03-28 at 22:05 -0700, Anurag Bonthalapati wrote:

Thanks Ed!! These resources and your detailed response helped a lot.
I didnt realize how specific this process is to the print
company/machine and/or the specific part type that one is trying to
print.

Yeah, there are several different processes and each has their own
benefits and problems.

I recognize that this technology is relatively new, but are there any
current standards in place? Like a NASA document or an ASME / SAE /
ASTM /
MIL spec?

Standards are only now being introduced (in the past few years) and are
still being developed.

The standards that I know of are:

ASTM F2924 - https://www.astm.org/Standards/F2924.htm
ASTM F3001
ASTM F3091 - https://www.astm.org/Standards/F3091.htm
ASTM F3049 - https://www.astm.org/standardization-news/?q=update/proper
ties-of-metal-powders-for-additive-manufacturing-ja14.html
ASTM F3055 - https://www.astm.org/Standards/F3055.htm
ASTM F3056 - 

WK43112 - https://www.astm.org/standardization-news/?q=update/mechanica
l-properties-of-materials-made-via-additive-manufacturing-nd13.html

Search at ASTM for more:

https://www.astm.org/COMMIT/SUBCOMMIT/F4205.htm

I know NASA is working on standards, but I don't know if they're
publicly available yet.

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20150021450.pdf

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20170001551.pdf

see also:

https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=922581

https://cdn2.hubspot.net/hubfs/340051/Design_Guides/Xometry_DesignGuide
_DMLS.pdf

https://www.repository.cam.ac.uk/bitstream/handle/1810/273903/JM2018-01
%20-%20D4AM%20Review%20report.pdf?sequence=1


The technology is not exactly "make a drawing and get a perfect print
first time and every time." This is still a technology that is in
development, in many cases.

But, progress is being made. I think Boeing has established their own
in-house processes and standards for some 3D printed jet engine parts.

Search for "dmls 3d printing design guidelines" for service providers
recommendations.



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