[AT] repairing machined arts

[szabelski at wildblue.net]

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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