Research of collimator hood of inside-laser powder feeding nozzle for broadband laser cladding

LEI Dingzhong; SHI Shihong; FU Geyan

doi:10.7510/jgjs.issn.1001-3806.2015.05.002

In order to improve the situation of the metal powder radiation existing in the current powder feeding broadband laser cladding nozzles and the low utilization rate, a collimation hood of powder feeding nozzle for broadband laser cladding was designed. A flow channel was designed to realize the uniformity of inside-laser powder feeding, to ensure that the powder was heated evenly and the divergence of powder beam was small. FLUENT software was used to analyze the internal fluid of collimation gas cover, to determine the inside cavity and the outlet size of device, to reduce the turbulence at the exit and to achieve better collimation effect. The experiment of the new powder feeding device was conducted to verify the effectiveness of gas collimator device. The results indicate that the best collimation could be achieved when width of the collimated gas curtain is 1.5 times of the width of powder beam.

Research of collimator hood of inside-laser powder feeding nozzle for broadband laser cladding

Corresponding author: SHI Shihong, shishihong@suda.edu.cn;

1. School of Mechanical and Electric Engineering, Soochow University, Suzhou 215021, China

Received Date: 2014-09-15

Accepted Date: 2014-09-30

Available Online: 2015-09-25

Abstract: In order to improve the situation of the metal powder radiation existing in the current powder feeding broadband laser cladding nozzles and the low utilization rate, a collimation hood of powder feeding nozzle for broadband laser cladding was designed. A flow channel was designed to realize the uniformity of inside-laser powder feeding, to ensure that the powder was heated evenly and the divergence of powder beam was small. FLUENT software was used to analyze the internal fluid of collimation gas cover, to determine the inside cavity and the outlet size of device, to reduce the turbulence at the exit and to achieve better collimation effect. The experiment of the new powder feeding device was conducted to verify the effectiveness of gas collimator device. The results indicate that the best collimation could be achieved when width of the collimated gas curtain is 1.5 times of the width of powder beam.

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Reference (16)

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Research of collimator hood of inside-laser powder feeding nozzle for broadband laser cladding

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