![]() The Davis factory builds some of the most advanced computer-numeric-controlled (CNC) milling machines in the world. 14ĭays needed to make a DMG Mori Seiki milling machine The results include molds for die casting, gears for transmissions, and cases for smartphones. Also known as milling machines, they use spinning tools to carve complex shapes out of roughly cast pieces of metal. The Japanese call them “mother machines,” because they make other machines possible. There, 40 workers build bedroom-size machines by hand, assembling 2,000 parts to create the computer-driven instruments that will form the hearts of auto, aircraft, and electronics factories across America. This is the plant’s automated half, but on the other side of a wall with windows, assembly lines swarm with people in white helmets and navy uniforms. ![]() It’s the kind of almost-deserted vista you would expect in advanced manufacturing. Three rows of towering, growling machines carve out precision components from rough metal castings weighing anywhere from a few pounds to a few tons. Surrounded by looming robotic equipment, he’s the only human in sight at DMG Mori Seiki’s gleaming machine-tool plant in Northern California. A factory worker drives a forklift carrying a four-ton metal casting across a polished concrete floor.
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