標題: Synchronized multi-spot scanning strategies for the laser powder bed fusion process
作者: Tsai, Chun-Yu
Cheng, Chung-Wei
Lee, An-Chen
Tsai, Mi-Ching
機械工程學系
Department of Mechanical Engineering
關鍵字: Laser powder bed fusion;Selective laser melting;Diffractive optical element;Multi-spot
公開日期: 1-May-2019
摘要: The laser powder bed fusion (LPBF) process can produce parts with complex internal geometries that cannot be easily manufactured using a material removal process. However, owing to the different heat transfer efficiencies of a laser melting process, the optimal process parameters are limited to a small range. This study used galvanometric scanner technology and a diffractive optical element (DOE) to build an experimental multi-spot LPBF system. Adjustable characteristics were the angle and the lateral distance between spots. An adjustable multispot method was used to modulate the temperature field on the powder bed and enhance the processing quality and throughput. The results from the synchronized three-spot method using different scanning strategies improved the layer surface roughness Ra by 3.2 mu m. Moreover, the scanning time was decreased by 38.1% of the single-spot method.
URI: http://dx.doi.org/10.1016/j.addma.2019.02.009
http://hdl.handle.net/11536/152339
ISSN: 2214-8604
DOI: 10.1016/j.addma.2019.02.009
期刊: ADDITIVE MANUFACTURING
Volume: 27
起始頁: 1
結束頁: 7
Appears in Collections:Articles