Structure Design And Experimental Research Of Piezoelectric Vibration Feeder Of Vetrical Double Driving

Vibration feeder has the advantages of the whole column characteristics, higherdirectional transport ability and work efficiency, and it’s widely used in the productionfield of machinery, electronics, medicine etc.. The traditional electromagnetic vibra-tion feeder has large volume, high noise, high energy consumption, especially thelarge amplitude, so it’s not suitable for conveying small precision parts.The design of vertical driving type piezoelectric vibration feeder adopts a pie-zoelectric element as the driving source, due to the constraint of piezoelectric ceramicproduction technology constraints as well as its own characteristics, driving ability islimited, sometimes it can not achieve the ability to drive the material, and the piezoe-lectric ceramic can stand small deformation. In order to improve its service life anddriving ability of piezoelectric ceramic. Based on the past piezoelectric vibrationfeeder, we design and manufacture piezoelectric vibration feeder of vertical doubledriving (referred to as the double driving feeder hereinafter) combined with the Na-tional863project “the research and development of vertical piezoelectric vibrationfeeder”.Study the double driving feeder’s annular piezoelectric elements, the mechanicalmodel and the balance equations are established, according to the analysis of defor-mation, calculate its maximum deflection; do modal analysis with the use of ANSYS,get the annular piezoelectric elements natural formation and the corresponding reso-nant frequency; do some experimental study on the relationships between the, analysisof different parameters of the piezoelectric element center point’s deflection and thedriving voltage and driving frequency, and then get the graphs of frequency characte-ristics of and voltage characteristics.Design and process the double driving feeder, especially the material choices and machining of the base, the supporting springs, vibration rod, piezoelectric elements,pressure ring and the top plate, introduce the working principle. In order to ensure thedouble driving feeder assembly process and the protection of piezoelectric ceramic,improve the assembly quality and efficiency, as well as in order to ensure consistencywith a number of feeder, this paper developed double driving feeder’s assemblyprocesses.Mechanical model is established to do vibration analysis on double driving feed-er, calculate the natural frequency and get the influence factors of the natural fre-quency of the system, analyze the influences of damping on the amplification factor.Through analysis of vibration between the double driving feeder and the single driv-ing feeder, compare maximum amplitude, calculate the stiffness of the supportingsprings and the annular piezoelectric element, on this basis, calculate the ratio of themaximum amplitude.Do modal analysis and harmonic response analysis for the double driving feederby using Hypermesh and ANSYS softwares. Through the modal analysis, the first fivemodes are obtained. and the first mode are closest to the actual working conditions bycomparison of the first five order formations, thus get the inherent frequency. Throughharmonic response analysis, the amplitude-frequency curve of the plate’s edge point isobtained.In order to do experimental study on the double driving feeder, determine the testmethods for the speed of conveying material and the plate’s amplitude. According tothe results, double driving feeder’s voltage characteristics and frequency characteris-tics are obtained. Through the tests, double driving feeder’s maximum carrying ca-pacity was determined, as well as the ratio with the single driving feeder’s maximumbearing capacity.