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  • Fundamentals Of Ultrasonic plastic welding
    . A generator supplies the high-frequency electrical energy to the system power module. A cable feeds the power to the converter and the piezoelectric ceramics expand and contract in response to the sinusoidal, high-frequency electrical signal. The titanium cylinder transmits this mechanical vibration
  • Rings get in the groove Without Tools
    Spiral-wound retaining rings expand the design envelope of conventional snap rings. A Smalley spiral retaining ring holds together halves of a split ring in a hydraulic cylinder ram. The arrangement is much simpler than bolted designs, say developers at Allied Systems Co., Sherwood, Oreg. Spiral
  • Guidelines for handling contact in simulations
    a chilled shaft expand in a close-tolerance hole. Stresses are calculated in the surrounding material. Surface-to-surface contact in the planetary gears drives the motion of four planet gears about the sun gear. Simulation software automates most of the setup and control of contact analyses

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