[AT] repairing machined arts

Sat Dec 7 04:35:57 PST 2019

The short answer here is "any metal that can be made into an extremely fine
powder".  Steel and iron present a real challenge as the extremely small
particles want to oxide very quickly.  Not sure how they're getting this
under control (suspect alloys and/or inert gas environments) but 3D folks
are claiming steel capabilities.

SO

On Fri, Dec 6, 2019 at 9:42 PM <szabelski at wildblue.net> wrote:

> Using 3D printing for metal parts consists of laying down a film of metal
> powder that is fused together by laser. You just keep applying layers of
> the metal powder to build up the part. The laser only fuses the powder were
> the CAD model tells it to.  Although the process it similar the 3D printing
> of plastic parts, there no plastic involved. Not 100% sure which metals
> they can do that way, but I believe titanium, aluminum, steel, bronze, (and
> I also believe maybe iron), parts can be made.
>
> Carl
>
> ----- Original Message -----
> From: Ken Knierim <ken.knierim at gmail.com>
> To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
> Sent: Fri, 06 Dec 2019 20:38:10 -0500 (EST)
> Subject: Re: [AT] repairing machined arts
>
> Yes, they have a Mythbusters Junior show (which inspired my son to want to
> be on the show) and some other spinoffs.
> As far as printed parts taking over for more traditional (casting and
> machining), I still believe in "good, fast, or cheap. Pick 2".
> I use printed parts in different designs but nothing seriously structural.
> And if I want something to last, it's usually NOT plastic.
>
> Call me old fashioned.
>
> Ken in AZ
>
> On Fri, Dec 6, 2019 at 3:57 PM <szabelski at wildblue.net> wrote:
>
> > If you remember the TV series “Myth Busters”, there is a new show emceed
> > by one on the guys (believe it’s Jamie), who does a lot of similar things
> > to what they did on MB. I caught one show where they were making an
> Ironman
> > suit made from titanium so they could prove/disprove some of its
> > capabilities. Some of the parts for the suit of armor were made using 3D
> > printing and powdered titanium. Didn’t take that long to make the parts.
> I
> > think I also saw a program somewhere were something was being made using
> > powdered iron (????).
> >
> > Don’t know how well other metals could be adapted to a process like that,
> > but if the technology can be properly developed, and the cost can be kept
> > down, could this be the beginning of the end for all types of
> machined/cast
> > parts? If so, would a repair shop still have to carry a large inventory
> of
> > parts, or just make a needed part using a 3D printer and the proper
> > material on the spot as needed?
> >
> > “Yes sir, you say you need a new engine block for your 1920 vintage
> > tractor? Just come back tomorrow and it’ll be ready.”
> >
> > Carl
> >
> >
> > ----- Original Message -----
> > From: Ken Knierim <ken.knierim at gmail.com>
> > To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com
> >
> > Sent: Fri, 06 Dec 2019 15:16:47 -0500 (EST)
> > Subject: Re: [AT] repairing machined arts
> >
> > Some progress has been made toward taking digital photographs of the
> > original part and creating a 3D model from them (photogrammetry). I have
> > the software (as part of a 3D printer package) but have not tried it yet
> so
> > I cannot vouch for the accuracy. I'm still new to 3D printing but we've
> > already put several parts into production systems... it's got its place.
> > The photogrammetry process might be a decent place to start if you want
> to
> > make a casting but I'd question accuracy for finished parts. The laser
> scan
> > technique would be better in my opinion.
> >
> > Something along similar lines for making parts is 3D metal printing. The
> > Rutherford rocket engines are made using this technology. It uses an
> > electron beam rather than a laser for melting the metal and requires a
> > vacuum chamber for manufacturing but obviously works with high pressures
> > and temperatures.
> >
> > Photogrammetry software:
> > https://all3dp.com/1/best-photogrammetry-software/
> >
> > Rutherford rocket engine:
> > https://en.wikipedia.org/wiki/Rutherford_(rocket_engine)
> >
> > I see these as interesting ways of creating parts. As with anything, it's
> > going to take some work to perfect. I doubt it would be affordable for
> > tractor parts for awhile.
> >
> > Ken in AZ
> >
> >
> >
> > On Fri, Dec 6, 2019 at 10:48 AM Jack <jacktractor at live.com> wrote:
> >
> > > The shortcoming of this for the repair of unavailable tractor parts is
> > > that you need a Cad file of a good part first.
> > >
> > >
> > >
> >
> https://www.imeche.org/news/news-article/feature-retrofit-transforms-legacy-machine-tools-to-keep-worn-parts-in-use?utm_campaign=PE%20newsletter%2C%206%20December&utm_source=email&utm_medium=PE%20Newsletter
> > > _______________________________________________
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> > >
> >
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