Page 6 - 3D Metal Printing Fall 2018
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    3D EDITORIAL Production Metal AM
Becoming a Reality
By Louis A. Kren
                From the introduction of metal additive manufacturing (AM) in the 1990s, when R&D efforts first birthed systems that could work with such materials, the technology has undergone a dizzying evolution. For three years, 3D Metal Printing has chronicled advancements in machines as well in design, materials, quality control, finishing and other aspects of metal AM. Applications have expanded, with medical, aerospace, moldmaking, auto- motive and other sectors realizing and beginning to benefit from advantages such as design free- dom, manufacturability, customization and the like. The technology has been seen as a solution for one-offs, prototypes, replacements, repairs and super-small-lot needs.
Today, we sit at the precipice of another leap forward in metal AM: volume production. Turn to page 27 and read how design and process optimization have helped enable metal-AM produc- tion in volumes that satisfy automotive needs. As the article, Leveraging AM for Auto Production,
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An official publication of
 “Today, we sit at the
precipice of another
leap forward in
notes, “Die casting and other traditional manufacturing processes can produce millions of components per year, while AM processes such as laser powder-bed fusion (LPBF) can excel and add value by delivering geometric complexity with the least amount of material possible, but not economically at
metal AM: volume high volumes.” That’s truly been the case, but the application
outlined in this article suggests a new dawn.
Using LPBF technology, parts for automotive LED head-
lights were produced on multiple systems in volumes rivaling traditional processes. Refinements and optimization strategies have resulted in a 19-fold gain in productivity across a year of pro- duction per system, from 7055 to 135,168 parts. Installation of seven machines running the opti- mized process results in volumes approaching 1 million parts/yr.
That’s some solid evidence for higher part volumes via metal AM. And there’s more. In this issue’s Tech Update section, beginning on page 11, 3DMP describes the introduction of HP Inc.’s new Metal Jet printer at IMTS, held this past September in Chicago. With decades of experience in developing and applying inkjet technology, HP has channeled this knowledge into its new binder-jetting printer. Thousands of nozzles spread across perpendicular print heads spray lay- ers in thicknesses of 50 to 100 microns. The result: 1200 by 1200-dpi 3D-printing accuracy, and speeds that company officials claim are 50 times greater than other presently available binder- jetting and selective laser-melting (SLM) metal-AM machines. And, density after sintering exceeds 93 percent. HP sees part volumes in the 50,000 to 100,000 range—depending on part size and complexity, of course—as the sweet spot for this printer.
There’s plenty more. Between AMUG, RAPID + TCT and IMTS—and no doubt at the coming FABTECH and formnext events—we see AM players introducing all manner of machines, soft- ware and other technologies that lead to higher-volume scenarios.
As we know, AM has its role, and offers efficiencies and advantages in select applications. And, for the first time, AM no longer eliminates itself from the higher-volume discussions.
Senior Editor
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