Additive manufacturing, the engineer’s version of what everyone else calls 3D printing, is too slow and expensive to mass-produce car parts, but the calculus flips for an ultralow-volume car like the Celestiq. GM engineers turned to additive manufacturing for more than 150 parts made from aluminum, stainless steel, and various plastics.
Engineers aren’t just creating CAD files and pressing Ctrl+P, though. Before graduating to production, all of the Celestiq’s 3D-printed parts passed through the Additive Industrialization Center on GM’s Warren, Michigan, tech campus. The 16,000-square-foot lab is filled with 3D printers, some the size of small sheds, that turn powdered metals, powdered polymers, and polymer filaments into car parts, but GM doesn’t make production components here. Instead, the AIC team validates the design before passing off production, usually to a…