中国激光, 2007, 34 (s1): 346, 网络出版: 2009-05-25  

激光再制造超细粉送粉器的实验研究

Experimental Measurement of Superfine Powder Feeder for Laser RefabricationF
作者单位
天津工业大学激光技术研究所, 天津 300160
摘要
针对超细粉输送过程中易出现挤压、摩擦、阻塞等现象,提出了超细粉雾化机制,阐述了超细粉送粉器的基本原理,设计了一种新型的超细粉送粉器,讨论了送粉器性能和超细粉末长距离输送实验。结果表明,采用特殊结构的搅拌器,避免了超细粉团聚现象,增强了超细粉的输送性能;载气量最佳工作区间为3~8 L/min;送粉速率与粉轮转速呈线性关系;送粉稳定性好,误差不大于1.8%;在送粉速度一定时,载气量越大,挺度越长,且粉嘴口径减小时挺度越长,因而具有良好的长距离输送能力。
Abstract
Powder was likely to be pressed,rubbed, blocked in the delivery process of superfine powder, so superfine powder atomization mechanism was developed and the basic principle of superfine powder feeder was introduced, then a new type of superfine powder feeder was designed. Performance experiments and distant delivery experiments were performed. It was shown that the adoption of special structured mixer avoided aggregation’s occurrence, enhanced the delivery performance of the superfine powder ; linear relation occurred between powder feed rate and wheel speed; optimum working range of air flux was 3~8 L/min; stability was fine and its delivery error was less than 1.8%; stiffness was proportional to air flux, but it was incerse proportion to nozzle, and its distant delivery ability was good.

冯立伟, 杨洗陈, 罗涛, 雷剑波. 激光再制造超细粉送粉器的实验研究[J]. 中国激光, 2007, 34(s1): 346. 冯立伟, 杨洗陈, 罗涛, 雷剑波. Experimental Measurement of Superfine Powder Feeder for Laser RefabricationF[J]. Chinese Journal of Lasers, 2007, 34(s1): 346.

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