진동형 볼피더의 가진력 해석과 적용

Abstract

Vibratory bowl feeders are widely utilized to align and feed the parts stacked inside the bowl of a feeder. The electro-magnetic force of the electromagnet in a bowl feeder generates the excitation force for the bowlto vibrate in both the horizontal and vertical directions to continuously feed the parts on the track. The feedrate of the part depends on the associated displacement in each direction during the vibration. Therefore, theexcitation force induced by the electromagnet should be estimated in advance to ensure the suitable design ofthe bowl feeder. In this study, a theoretical solution was developed to calculate the electro-magnetic force ofthe electromagnet for a bowl feeder. Using the proposed solution, the electro-magnetic forces corresponding toa variation in the input parameters of the electromagnet, such as the voltage, frequency, and air gap, couldbe obtained. The force values obtained using the theoretical solution exhibited a satisfactory agreement withthe results obtained using the finite element method, thereby demonstrating the validity of the approach. Subsequently, the bowl displacements were analyzed using the motion equation for the bowl feeder when thetheoretically obtained excitation force were applied to vibrate the feeder. The correlation between the verticaldisplacements of the bowl and input parameters of the electromagnet could be obtained.