Analysis on surface finish of thin-wall parts by laser metal deposition with annular beam

Analysis on surface finish of thin-wall parts by laser metal deposition with annular beam
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环形束激光金属沉积薄壁零件表面光洁度分析

DOI:
10.1016/j.optlastec.2019.105605
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发表时间:
2019-11
影响因子:
5
通讯作者:
Dongji Cheng
Dongji Cheng
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jinchao Zhang;Shihong Shi;Geyan Fu;Jianjun Shi;Gangxin Zhu;Dongji Cheng

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激光金属沉积是一种自由形状的制造技术,它可以产生近净形状的零件。研究了设计新颖的环形激光光束和激光扫描速度对薄壁零件表面光洁度的影响。用微观粗糙度Ra和宏观波纹度Wt参数来表征表面特征。结果表明,环形光束在边缘产生的温度高于中心温度,有利于获得光滑的表面。提高激光扫描速度,可以显著提高薄壁零件的表面光洁度。在最佳扫描速度为8 mm/S的条件下,利用环形激光获得了表面光洁度Ra=3µm、Wt=18µm的薄壁零件。
Laser metal deposition is a free-form manufacturing technique, which allows generating near-net-shape parts. In this paper, the influence of the novel designed annular laser beam and the laser scanning speed, on the surface finish of thin wall parts, is investigated. The parameters of microscopic roughness R a and macroscopic waviness W t are used to represent surface characteristics. The results show that the annular laser beam, producing a higher temperature at the edges than at the center, is beneficial to obtain smooth surfaces. By increasing the laser scanning speed, the surface finish of thin-wall parts can be significantly improved. With the optimized scanning speed of 8 mm/s, thin-wall parts with attractive surface finish at R a= 3 µm and W t= 18 µm are formed by annular laser beam.
DOI: 10.3788/cjl201643.0303008
发表时间: 2016
期刊: Chinese Journal of Lasers
影响因子: --
作者:
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