A movable sunshade on the roof of the Milwaukee Art Museum consists of a pair of wing-like structures, each made up of 36 steel ribs ranging in length from 24 to 105 ft. The ribs are mounted on two rotating steel shafts, in turn connected to the pavilion's spine. To open and close the sunshade, 22 hydraulic cylinders (11 on each side) stroke simultaneously. The cranks swing a 90-degree. arc to open the wings in 3.5 minutes. Engineers equipped the building with two separate ultrasonic wind sensors to monitor velocity and direction. If wind speed exceeds 23 mph for three seconds or longer, the control system automatically closes the wings. Similarly, a lightning sensor is installed to predict imminent lightning strikes. The power unit consists of two identical pump sets. Each 30-hp motor drives a tandem axial-piston pump. One pump of each tandem set powers the north wing, the other powers the south wing. This circuit can move both wings even if one motor/pump group is out of service.
As manufacturers add new technologies to their products, designing for compliance becomes more difficult. Prepare for the certification testing process. Otherwise, you increase the risk of discovering a safety issue after a product leaves the assembly line. That will cause significant time-to-market delays, be much costlier to fix, and damage your brand in the eyes of customers.
Stratasys will be exhibiting two groundbreaking large-scale additive manufacturing technologies, as well as other new products, next month at the International Manufacturing Technology Show (IMTS) in Chicago.
Two new technologies from Stratasys, created in partnership with Boeing, Ford, and Siemens, will bring accurate, repeatable manufacturing of very large thermoplastic end products, and much bigger composite parts, onto the factory floor for industries including automotive and aerospace.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
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