Parameters Optimization Of Multi-layer Leaf Springs Of Vibration Feeding

Electromagnetic vibratory feeders are widely used in automatic production, such asfood, machinery, electronic product, pharmaceutical product and so on. Leaf spring is akey part which can ensure electromagnetic vibratory feeder long-term reliable operationand occupies an important position in electromagnetic vibratory feeders. The selection ofparameters of leaf spring is still depending on trial and error in modern production.Selection and matching of various parameters can not reach the requirement of vibratoryfeeder and this seriously affect the feeding efficiency. Therefor it is necessary to study thematching relationship between the parameters of leaf spring and the system for improvingthe conveying speed.This paper takes leaf spring of disc type electromagnetic vibratory feeder as theresearch object. The relationship between leaf spring parameters and the vibration systemis studied and the theoretical stiffness formula of multi-layer leaf spring is establishedThe dynamic model of electromagnetic vibratory feeder with three degrees offreedom using Lagrange equation is established and the dynamic behaviour of thevibration system is obtained first. It will provide a theoretical basis for the modal analysisof vibration system. Then the screw theory is applied to the platform of electromagneticvibratory feeder to study the stiffness of the vibrating platform. The optimal variationrange is obtained by analysing the impact of geometric parameters and installationparameters of leaf springs on the stiffness of the system. Then the modal analysis ofelectromagnetic vibratory feeder is studied using ANSYS software and natural frequencyand vibration modes is obtained. We get the impact of the change of the parameters of leafsprings on the natural frequency of the vibration system by changing the parameters. Thestiffness of leaf spring is analyzed, which is statically indeterminate structure and thetheoretical stiffness formula of multi-layer leaf spring is obtained and revised.