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ULTRASONIC WELDING
This is a solid state welding process for joining similar or dissimilar metals by application of high frequency vibratory energy to work pieces held together under moderate static pressure. The equipment consists of a frequency converter, which changes 50 Hz power to the high frequency 15 - 60 kHZ required by ultrasonic head. The head has a piezo - electric transducer, which converts the high frequency electrical output into vibratory mechanical motion and wave guides, which transmits the vibratory waves to the tools and into the weldment. The job is tightly clamped while welding. The process is used to weld plastics, thin foils and dissimilar metals. The process is employed for manufacturing of toys for children.
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Torsional equation for circular shaft
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Q. The area of the hysteresis loop of a given magnetic material is 50cm 2 with the two axes scaled as 1cm = 20AT and 1cm = 50mWb, for 50Hz frequency find the total hysteresis
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Discover ratio of the torsional strengths: A hollow shaft of inner diameter is 1/2 × the outer diameter & a solid shaft of diameter is the external diameter of the hollow shaf
1 atm = ? n
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