3-D printing gives businesses a low-cost option for odd jobs

Jan 02, 2013 by Ronald D. White

What does a business do if the vintage aircraft part a customer needs hasn't been made in decades? For a solution, Airflow Systems of Capistrano Beach, Calif., turned to Rapid Tech at University of California-Irvine. Through the use of Rapid Tech's cutting-edge 3-D manufacturing technology, the aircraft parts manufacturer got what it needed in exchange for the cost of the materials required to do the work.

"I believe that small entrepreneurial businesses like ours will be the backbone of manufacturing innovation in the U.S.," said Bill Genevro, president of Airflow Systems. "But we can only do this with the help of entities like Rapid Tech."

Rapid Tech is in the UC-Irvine Engineering building and has been funded by Saddleback College and grants from the National Science Foundation. The nonprofit's primary function is teaching students advanced manufacturing techniques, but it also provides low-cost help for businesses.

"We do hundreds of projects each year, dozens of outreach and training events," said Ben Dolan, director of design and engineering research projects at Rapid Tech.

Rapid Tech's specialty is a form of modeling in which a printer uses digital input from a computer to create three-dimensional solid objects, by thin layer. The printer head extrudes a small amount of plastic or other material, making several passes before the form begins to take a recognizable shape.

The process enables users to quickly design and refine without resorting to the more costly and time-consuming process of having a metal part forged and repeating that procedure to correct .

Each of the projects uses one of the more than 20 3-D digital printers and other equipment at Rapid Tech. Because they have become increasingly refined and sophisticated, these so-called desktop factories are being referred to as the third manufacturing revolution.

"After the , this type of engineering work was considered lowbrow," said UC-Irvine mechanical engineering professor Marc Madou. "Now we're helping to create the supply chain of the future."

But the process demands considerable computing power, so much so that when Dolan needed new desktops, the only kind that came ready to use, without extensive upgrades, were some of the world's fastest boutique game computers, such as those made by Alienware. The best 3-D printers cost $50,000 to $1 million.

This is what puts the technology out of reach of many small- to medium-sized businesses and even some of the larger and more established ones.

Genevro's Airflow Systems is a small firm that has been designing, building and selling FAA-certified aircraft equipment, such as engine intercoolers, since 1987. Genevro says he has used Rapid Tech's help to save weeks and sometimes months of production time.

One of the more esoteric projects involved re-creating parts for a 1938 Japanese Zero fighter plane, using only the pitted, corroded and incomplete original parts. This was for a restoration project for the Evergreen Aviation Museum in McMinnville, Ore.

With Rapid Tech's help, Genevro was able to scan each part, correct the defects, and then reproduce a 3-D representation of parts that hadn't been manufactured in nearly 70 years. The technology is just as useful in designing new and improved parts for machines currently in production.

For the well-known watersports equipment brand Hobie Designs Inc. in San Juan Capistrano, Rapid Tech helped develop a carbon fiber paddle based on a partial design that the lab was able to extend across the entire item.

"The 3-D scanning, computer-assisted design and prototyping process helped us deliver this new concept as fast as we could conceive it," said Hobie Designs President Jeff Alter, "and now customers get to reap the rewards."

Tom Hester, who runs Hester Studios in North Hollywood, Calif., has a film, video and animation character design resume that includes work on the "Shrek" movies, "Harry and the Hendersons" and the Michael Jackson video "Thriller."

He has worked with Rapid Tech to create digital sculptures and stays in regular contact with its experts, including Rapid Tech's director, Ed Tackett. Hester says he does that to keep abreast of the latest techniques in a highly competitive field.

"We talk pretty frequently, every three or four months. I have gone to them on projects eight times or more," Hester said. "I do it to have a fighting chance of keeping up with competitors. Staying in touch helps me keep up with what is going on."

The Obama administration has proposed the development of as many as 15 regional hubs or Institutes of Manufacturing Innovation. Part of their function would be to help U.S. manufacturers use advanced manufacturing techniques that would give them a competitive edge.

Rapid Tech officials say they are already doing that, but they caution that they don't take on just any project that a business might be interested in developing.

"We decide on a case-by-case basis," Tackett said. "If someone wants us to make a box, probably not. We don't make boxes. We ask ourselves, 'Is there intellectual merit to the project? Will it help train students? Will it help other companies?' That's what we are looking for."

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Sanescience
not rated yet Jan 03, 2013
I've been on this band wagon for a long time. The next "age" of human development will probably be defined by complex object printing and/or genetics. The "space age" will really be an offshoot of enablement by advancement in those two areas. Though nano technology is a *very* broad term, it might be given the title as the most fundamental development for the coming dramatic and rapid evolution of man.

Unless quantum computing turns out to be the path to transcendent intelligence that far surpasses anything humans can imagine. I'm a bit skeptical though.
Kieseyhow
not rated yet Jan 03, 2013
I do not see why such a technology should need such expensive computers. I seriously doubt it requires as extensive processing as ray tracing for instance. Most likely the people involved are just impatient and looking for an excuse to spend money on cool toys.
antialias_physorg
not rated yet Jan 03, 2013
I do not see why such a technology should need such expensive computers

You need a lot of memory, because the surface meshes of objects are incredibly detailed (if you want to get a good resolution product thatis). If you want to display the dataset you again need memory (this time in your top-of-the-line graphics cards)

You also need considerable computing power because the algorithms for where and how to create extra struts or interior strengthening of thin shelled parts isn't trivial. It's note enough to just have a surface model of something to be able to print it.

Worst case you have to do load bearing analyses which require finite element methods (and that require TONS of memory and CPU&GPU speed to complete even moderate tasks in an acceptable timeframe).

50k is rather cheap considering the demands.