Energy Attenuation Modelling for Laser Cladding Process with Coazial Powder Nozzles
Coaxial laser cladding is one of the most difficult processes to optimize due to the number of parameters and the interactions among them. Therefore, parameter optimization is usually based on trial and error techniques. One of the most difficult parameters to predict is the real energy radiated to the substrate, since the laser beam is partially attenuated by the projected powder. This article presents a model which is able to predict the attenuation of the energy and evaluate the real radiated energy to the substrate. The particle mass concentration at each level is estimated by a CFD model, which can predict the particle flow from the nozzle to the substrate. Once the particle concentration is obtained, an energy balance is applied for differential levels in order to obtain the total attenuation of the laser beam. In order to measure the attenuation, a special set-up has been developed to measure the laser beam power before and after powder injection. The model validation results show coherence between the real attenuation and that estimated by the model.
Laser Cladding Power Attenuation Coazial Nozzle
I. Tabemero A. Lamikiz E. Ukar L. N. Lopez G. Urbikain J. Figueras
Dept. of Mechanical Engineering, Univ. of the Basque Country, Alda. Urquijo s/n, 48013 Bilbao, Spain IDEKO Technology Centre, Arriaga Kalea 2, 20870 Elgoibar, Spain
国际会议
The 16th International Symposium on Electromachining(第16届国际电加工会议)
上海
英文
419-423
2010-04-19（万方平台首次上网日期，不代表论文的发表时间）