关键词: 超声振动；毛细管；微量给粉；给粉速率

Abstract:

In order to satisfy the needs of modern industry for the powder manipulation technology, this paper designed micro-feeding powder device by ultrasonic vibration capillary. And experimental studies were carried through to understand the mechanism of the ultrasonic vibration capillary micro-feeding powders. The experimental system of ultrasonic vibration capillary micro-feeding powders was used to feed micronano powders through capillary with an inner diameter of 120μm. For the copper powders with diameter less than 30μm, the feeding rate was measured and the powders flowed out of capillary with rate less than 0.3mg/s. And it is found that the flow rate changes when the drive voltage changes. The experimental system was also used to feed powders by fix quantity and fix point, and found that the mass of minimal point is 0.0026mg. With this experimental system, the copper powders can be deposited to form patterns of dot, thread, lay.

Key words: ultrasonic vibration, capillary, micro-feeding powder, feeding rate