Experimental Study On Ultrasonic Vibration Feeding System Using The Longitudinal Mode Transducer

A new concept utilizing ultrasonic vibration feeding to realize the foreword transportation of the material is proposed for the first time in the paper. In this paper an ultrasonic feeder have been designed and manufactured that used the transducer as the vibration source in the example mechanism, and we carried on some experiments about it and get some conclusions.The paper consists of six chapters, given as follows:1. IntroductionAs an important link in the automatic production line and assembly line, the vibration feeder is widely applied in the light industry and other occasions. But the traditional feeders(electromagnetic and piezoelectric vibration feeder) are limited in certain degree in the clean and low noise occasions. The paper lists the advantages and disadvantages of the electromagnet and piezoelectric feeders, and then a review about the domestic and foreign research results of the two kinds of feeders is given. In this foundation, a new way that uses the ultrasonic wave to feed instead of the low tone frequency is proposed. And its feasibility and the possible broad application prospect are analyzed.2. The basic theory of PiezoelectricityThis chapter mainly introduces the basic theory of piezoelectricity, expatiates piezoelectric knowledge that related with the transducer. The basic concepts of piezoelectric effect, piezoelectric material and piezoelectric equation are introduced. Four kinds of piezoelectric equation that used to derive the vibration mode of thetransducer are listed.3. Design of bolt fixing piezoelectric transducerIn this chapter the ultrasonic technology and its application are introduced. The theory and the structure of the transducer are analyzed. The longitudinal oscillation mode ultrasonic transducer has been selected in this chapter. And bolt fastening ultrasonic transducer which can produce this mode is designed. At last the power supply that drive the transducer is introduced.4. The structure design and movement analysis of the ultrasonic feeding systemIn this chapter, the structure and the components of the ultrasonic feeding are designed and manufactured. The material movement mathematical model and the mechanics model of the vibration feeding system are established. The relation between natural frequency and vibration frequency is analyzed.5. The experimental study of the ultrasonic feeding systemIn this chapter, the transducer is tested. Its parameters such as resonance frequency and impedance are obtained by impedance analyzer. The transducer's amplitude is surveyed and we also get the relational curve between oscillation amplitude and frequency. Moreover, through experiment we found that the resonance frequency of the transducer has changed in the different state, and the factor that influenced the frequency is analyzed. And we carry on experiments to the new feeding way. The comparison between the performance of the ultrasonic feeder and ordinary feeder is carried on. The factors that influenced the system's resonance are analyzed.6. Conclusion and expectationIn this chapter the conclusion of the paper is given and the optimization plan of the ultrasonic feeding way is proposed, and the other structures that can realize ultrasonic feeding are assumed.