The first of several machine tools to automate fuselage skin panel assembly for the giant U.S. Air Force C-17 Globemaster III airlifter now operates at Boeing's Long Beach, CA, facilities. The machine, a Torres Mill 5-axis NC trimming and drilling machine, can trim and drill skin panels as long as 40 ft and as wide as 12 ft, with a curvature of up to 3 ft. And it can accomplish this task at a rate of 400 inches a minute. The machine also precisely drills tool-coordinating holes for locating detail parts in later assembly operations. An electronic database of the parts' dimensions controls the drilling and trimming operations. It provides an accuracy to within 0.002 inch, less than the thickness of a human hair. It also cuts out openings for hatches, access panels, and wiring and tubing. The accuracy is needed for two follow-on automation machines planned for operation early this year. One, a 33-ft-tall, 50-ft-wide riveter, will combine several smaller skin panels into one large panel and add the internal frames. The second will attach the underfloor bulkheads. E-mail David Eastman at www.boeingmedia.com.
The Dutch are known for their love of bicycling, and they’ve also long been early adopters of green-energy and smart-city technologies. So it seems fitting that a town in which painter Vincent van Gogh once lived has given him a very Dutch-like tribute -- a bike path lit by a special smart paint in the style of the artist's “Starry Night” painting.
For decades, engineers have worked to combat erosion by developing high-strength alloys, composites, and surface coatings. However, in a new paper, a team at Jilin University in China turned to one of the most deadly animals in the world for inspiration -- the yellow fat-backed scorpion.
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