垂直驱动型超声波送料器的研究

Study on vertical drive ultrasonic feeder

提出了一种全新结构的超声波送料器。为了克服电磁干扰和消除噪声,采用基于压电陶瓷的超声波换能器作为送料器的驱动装置,对超声波换能器的振动模式和性能参数进行了分析和设计。为了实现给料器的有效振动,采用了垂直驱动型的结构,对结构进行了设计、计算,并建立了相关的方程。实验表明:在工作频率为17.5 kHz,弹簧片厚度为7 mm时,对直径3 mm的金属薄片的输送速度可达到36 cm/min。该送料器能够实现对微小物体的输送,物料运动趋势明显并且消除了电磁干扰。

In order to overcome a electromagnetic interference of the electric and magnetic feeder and to reduce the acoustical noise of low frequency piezoelectricity feeder, a new ultrasonic vibration feeder was presented. An ultrasonic transducer based on piezoelectrical ceramic was used to drive the feeder. The vibration model and parameters of the ultrasonic transducer were studied and calculated and the relational curve between oscillation amplitude and frequency was obtained. In order to create effective vibration,a vertical-drive was adopted to design its construction. The structure parameters were calculated,and correlative equation was built. Experimental results show that the discharge velocity of thin slice metal of 3 mm diameter reaches 36 cm/min,when frequency is 17.5 kHz and thickness of spring reed is 7 mm. In addition, proposed ultrasonic feeder can carry or feed small solid object without electromagnetic interference.