A Study On Key Technologies For Digital Vibratory Feeding System

Automatic feeding devices play a key role in automatic production line, which roughly take up 30 percent of the whole cost of the production line. Vibratory feeding is the most often used feeding method. It is of great significance to carry out, in depth, both theoretical and experimental study in this field. Conventional vibratory feeder has many limitations, such as low feeding efficiency and lack of flexibility. Moreover, parts jamming can only be eliminated by operators manually, which increases the operator's workload and directly affect the production efficiency.The aim of the project is to develop a digital vibratory feeding system and carry out study, in depth, on its key technologies. The system mainly consists of a decoupled vibratory feeder, sensors and a driving controller. There are two vibrations involved in the decoupled vibratory feeder, i.e., the horizontal vibration and the vertical vibration, which are decoupled in mechanical structure and can be independently controlled by the driving controller. The driving controller, with a single-chip computer system as its core, can control the decoupled vibratory feeder in time, based on the sensor signals. The wave form, amplitude, frequency as well as phase difference of the driving signals, in the system, all can be easily adjusted online by software means, so as to achieve the optimum conveying velocity and flexibility in the feeding process. Furthermore, parts can move forward or backward in the feeder under the control of the computer, through which the parts jamming can be eliminated automatically.A decoupled vibratory feeder and its driving controller have been designed and fabricated, based on which an experimental set-up of the digital vibratory feeding system has been successfully developed in the project. The part's conveying velocity has been simulated in C language based on the modeling of decoupled vibratory feeder and the part in the feeder. The relevant experiments have been carried out for verifying purpose, and the experimental results match well with the simulation results.