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The process of micro-coining has been widely applied in micro-forming as it is easy to realize the positioning and assembling of micro-parts. In this study, ultrasonic vibration-assisted micro-forming system was established whereby conventional coining (C-coining) and ultrasonic vibration-assisted coining (US-coining) of micro-cylinder of pure copper were carried out. In case of C-coining, the height-to-diameter...
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