›› 2012, Vol. ›› Issue (06): 1402-1408.

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Ultrosonic powder feeding system in hydroxyapatite cold spraying equipment

ZHANG Lei, GENG Wei-qiang, BAO Yong-ji, ZHAO Ji   

  1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2011-06-03 Online:2012-11-01

Abstract: In order to meet the requirement of micro-feeding for the hydroxyapatite cold spraying process, an ultrasonic powder-feeding system was developed. Theoretical analysis and experimental research on the powder-feeding principle and capability of the system were performed. The results showed that the feeding capacity of the system is related to the voltage and frequency of the driving power, the performance and structural parameters of the piezoelectric ceramics, the length and damping coefficient of the feeding tube. From the experiments, the effects of the factors on the feeding rate were analyzed and discussed. For the hydroxyapatite powder, the minimum feeding rate of the developed system is about 0.002 g/s and the maximum about 0.25 g/s. The powder feeding process of the system responses rapidly, meeting the micro-feeding requirements.

Key words: mechanical manufacture process and equipment, powder feeding, ultrasonic vibration, lossy traveling wave, hydroxyapatite

CLC Number: 

  • TH165.1
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