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February 10, 2020 11:12 AM

Collaboration key to accelerating use of 3D printing in automotive

Audrey LaForest
Plastics News Staff
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    Audrey LaForest
    The Center for Automotive Research held an industry briefing seminar Jan. 14 on the how the automotive industry can accelerate the use of additive manufacturing to meet future mobility needs. From left to right: Gary Vasilash of Automotive Design & Production; Jon Walker of EOS North America Inc.; Robert Hoglund, Altair Engineering Inc.; Kevin Brigden, Renishaw Inc.; Ellen Lee, Ford Motor Co.; and Ryan Hahnlen, Honda R&D Americas Inc.

    Troy, Mich. — Automakers are not short on success stories for their use of additive manufacturing in automotive applications, but several hurdles remain when it comes to further accelerating the adoption of the technology.

    Volkswagen AG, General Motors Co. and BMW AG, for example, all have a "rich history" of using additive manufacturing to produce spare parts, tooling and other low-volume components, according to Ford Motor Co.'s Ellen Lee. But automotive has specific needs in terms of scale, cost and materials that differ from other industries, such as aerospace and medical, that are also utilizing the technology.

    Last year at the North American International Auto Show in Detroit, Lee outlined the Dearborn, Mich.-based automaker's early achievements with 3D printing, too. With technology from Carbon, a digital manufacturing startup in the Silicon Valley area, Ford is designing and producing 3D printed end-use parts on three production vehicles.

    "At the time, I mentioned how excited I was because we were really at a tipping point," Lee recalled during a Jan. 14 industry briefing seminar organized by the Center for Automotive Research.

    "In the years since, I think my colleagues in the automotive industry have really delivered," she said. "We've seen so many examples from virtually every single major automotive manufacturer, showing examples and innovative use cases of additive manufacturing across the board."

    Common uses for 3D printing in the automotive industry have typically leaned on manufacturing aids such as jigs and fixtures, efforts to increase customization and personalization, spare parts, and low-volume, high-end vehicle applications.

    Even with those efforts, the automotive industry is still at the nascent stages in using additive manufacturing for scale production, Lee said.

    Audrey LaForest
    The Center for Automotive Research's industry briefing on additive manufacturing was held at Automation Alley, a technology business association based in Troy, Mich., a Detroit suburb.
    ‘Leaps and bounds'

    To accelerate its adoption, there is a huge need for everyone — from automakers and suppliers to 3D printing and technology firms — to come together, precompetively as an industry, to solve the stubborn problems that can't be deciphered alone, she explained.

    "Each of these successes took a significant amount of work, resources and efforts to solve some problems that might have been solved more easily as a group, as a collaboration," she said.

    A top priority is developing standards for material and performance specifications as well as quality metrics, which will enable more process control and help drive use and economies of scale. This means working together with other organizations — again, precompetitively, Lee said — to define those standards and test methods.

    "We want to be talking about the same thing across the industry, so that we're comparing apples to apples. … The old rules don't apply," Lee said.

    Jon Walker, automotive specialist and business development manager for industrial 3D printer maker EOS North America Inc., said production speed and part costs are among the top barriers to more widespread use of additive manufacturing in the automotive industry.

    But progress has been made.

    "Every year, the technology is getting faster and faster," Walker said during a presentation at the industry briefing. "I've been with EOS for almost four years now, and I can tangibly say that certain materials have gotten half as expensive in that time and certain machines have gotten almost four times more productive. The leaps and bounds are very, very quick, but it's still not quite perfect enough for the automotive industry."

    The auto industry shouldn't let perfection be the enemy of good, Lee warned, as it would slow down research and development.

    "Don't allow the quest for perfection to prevent you from doing good because although it takes a measurable amount of effort, time, money, resources [and] distance to get from nothing to something, it's going to take an infinite amount of resources to get to perfection because perfection is a moving target," she said.

    By implementing processes when they're ready, it will allow stakeholders working with additive manufacturing to develop those fundamental technologies that will help everyone "get to the next step of that ever-moving target," Lee explained.

    Audrey LaForest
    Jon Walker, automotive specialist and business development manager at EOS North America Inc., says despite the hurdles, 3D printing for the automotive industry is not a toy; it is "a real technology that we can sink our teeth into."
    ‘Tool in the toolbox'

    The ongoing transformation of the automotive industry — as conversations and actions toward future mobility concepts continue to crescendo — is also driving the use and development of additive manufacturing.

    But Walker, of EOS, is quick to point out that not every part of a vehicle is going to be 3D printed.

    "I think that's a bit of a crazy utopian idea," he said, adding that traditional manufacturing processes such as plastic injection molding, die casting and tire manufacturing, are still important.

    "3D printing is just going to be one more tool in the toolbox," Walker said.

    Ryan Hahnlen, senior engineer of strategic research operations at Honda R&D Americas Inc., said cost also plays a role in this. Traditional manufacturing is more expensive if you're only making one part, but that cost comes down once you're making thousands or hundreds of thousands.

    With additive manufacturing, the cost is usually consistent whether you're making one or 10,000 parts, he said. The value of additive manufacturing lies within the areas of part performance, weight savings, costs savings, augmenting parts by putting complexity only where it is needed, similar material joining, and tooling.

    "That's where the value of [additive manufacturing] is," Hahnlen said. "It's in leveraging each process's unique capabilities."

    Audrey LaForest
    Ryan Hahnlen, senior engineer of strategic research operations at Honda R&D Americas Inc., says that while direct print parts generally are not cost effective in high-volume manufacturing, there are several opportunities for additive manufacturing to add value in other ways, such as part performance and complexity.
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