中国激光, 2007, 34 (s1): 175, 网络出版: 2009-05-25   

选区激光熔化快速成型制造精密金属零件技术 下载: 525次

Direct Manufacturing of Precision Metal Parts by Selective Laser Melting
作者单位
华南理工大学机械工程学院, 广东 广州 510641
摘要
对金属粉末材料进行了自动化成型工艺实验,结合实验,研究了影响金属零件直接自动化成型的硬件因素、软件因素和材料因素。其中硬件的影响主要是激光的光束质量和功率、聚焦系统、扫描系统和铺粉系统等;软件的影响主要是扫描策略、切片软件的使用和CAD模型的建立等;材料方面的影响主要是材料的成分、熔点、粒度和粉末的粒径等。通过针对不同成分和粒度的粉末材料的实验,获得了从CAD模型到分层制造出金属实体的样件,结果表明,成型零件的致密度达100%,尺寸精度小于0.1 mm,是完全冶金结合的具有较高成型精度的金属零件。
Abstract
Using a selective laser melting (SLM) machine-dimetal 240, a series of experiments for direct manufacturing of precision metal parts were carried out. Some effect factors on precision deposition layer by layer were studied combining with the experiments. They can be divided into three categories: hardware, software and materials. Hardware factors include the beam quality, power and wavelength of the laser, the focusing performance of the optical system, and the scan speed and the powder delivering precision. Software factors mainly include the designing of the metal parts with CAD software, slicing of the CAD model and scan strategies. Material factors are the composition of the material, the melting point, and the shape and the size of the metal particle. CAD models will be manufactured into metal parts by using metal powders with different composition and particle size layer by layer. The analysis shows the parts are metallurgical bonded entities with density of 100%, dimension precision <0.1 mm and surface roughness of about 30 μm.

吴伟辉, 杨永强, 卫国强. 选区激光熔化快速成型制造精密金属零件技术[J]. 中国激光, 2007, 34(s1): 175. 吴伟辉, 杨永强, 卫国强. Direct Manufacturing of Precision Metal Parts by Selective Laser Melting[J]. Chinese Journal of Lasers, 2007, 34(s1): 175.

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