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

摘要：

为了满足新型微小型非均质制造技术对微细粉体须进行微量、定量、定点送给的要求，设计了超声振动毛细管微量给粉装置，开发了微量给粉实验系统。用内径120μm的毛细管，对直径小于30μm的铜粉颗粒进行了相应的实验研究。实验结果表明：超声振动毛细管微量给粉实验系统可以实现微细粉体的微量给粉，给粉速率小于0.3mg/s，且随着驱动电压的变化而改变；控制超声振动持续时间和沉积平台的运动，可以实现粉体的定量、定点给粉，最小给粉量可达0.0026mg；联合控制给粉装置和沉积平台可沉积出点阵、线、面等图案。

关键词: 超声振动；毛细管；微量给粉；给粉速率