Producing high-quality end-production metal parts with additive manufacturing for applications such as aerospace requires some very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International. Its latest proposed working standard addresses powder bed fusion AM methods for metals, which includes EOS's direct metal laser sintering (DMLS) among others. Shown here, a prototype of a topology-optimized Airbus A380 bracket made of stainless-steel powder produced via EOS's DMLS (right) with a conventional cast steel bracket shown behind. (Source: Airbus Group Innovations)
Excellent point Greg, much better than putting the cart before the horse and then having compatibility issues later. Standards tend to evolve somewhat with new technologies but they are definitely a good idea, especially in the fields you mentioned.
It would be nice to see printer material delivery standards. Companies producing new printable materials can be prevented from selling them without a fee because the printer manufacturers own the patents to material delivery mechanisms for their printers. This could be a big material development disincentive.
Nancy, good point about the way that standards tend to "evolve." The big thing that's changed after several decades is now using these processes for end production, especially in fields with rigid quality requirements. There's enough complexity involved in 3D printing/additive manufacturing--among processes, machines, materials, and the characteristics of finished parts--that advance cooperation has become necessary.
jhankwitz, thanks for the reminder about the captive & proprietary status of so many 3D printing materials. There is an open matetrials market, especially for filament fusion printers, but these are low-end desktop machines and the materials tend to not be engineering quality. As we've discussed several times on DN, an open engineering-quality materials market is highly desirable but faces several hurdles. Standards for specifying higher-quality 3D printing materials will certainly help.
To give engineers a better idea of the range of resins and polymers available as alternatives to other materials, this Technology Roundup presents several articles on engineering plastics that can do the job.
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team £100 to make (about $161 US).
A tiny humanoid robot has safely piloted a small plane all the way from cold start to takeoff, landing and coming to a full stop on the plane's designated runway. Yes, it happened in a pilot training simulation -- but the research team isn't far away from doing it in the real world.
Some in the US have welcomed 3D printing for boosting local economies and bringing some offshored manufacturing back onshore. Meanwhile, China is wielding its power of numbers, and its very different relationships between government, education, and industry, to kickstart a homegrown industry.
You can find out practically everything you need to know about engineering plastics as alternatives to other materials at the 2014 IAPD Plastics Expo. Admission is free for engineers, designers, specifiers, and OEMs, as well as students and faculty.
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