微细金属粉末材料的激光快速微成型

快速成型技术 (RP)是一种基于离散 /堆积成型原理的新型数字化成型技术。采用激光熔化金属粉末材料直接制造金属零件是RP技术向RM (RapidManufacturing)发展的必然趋势 ,也是世界各国研究开发的热点。而利用微纳粉末金属材料进行微成型目前尚处于探索阶段。本文采用自行设计的激光精细烧结装置对粗、细粉末金属材料进行了对比烧结成形试验 ,分析了影响激光烧结微细金属粉末微成型的各种参数。结果表明 ,烧结金属细粉所需的功率远低于烧结粗粉所需的功率 ,成形精度好。通过对参数的优化 ,找到了最佳的成形工艺 ,成功制作出壁厚只有 10 0 μm左右的微小金属件

Microfabrication of micron metallic powder with laser sintering

Rapid Prototyping technique (RP) is a new type digitized forming technology based on the forming principle of discreation/addition. It is an inevitable trend to adopt laser melting metal powder material directly to make metal part from RP technology to RM ( Rapid Manufacturing) . However nowadays it is still at the stage of exploring to utilize micro powder metal material for micro-fabrication. In this paper an equipment of Nd:YAG doubling frequency laser was developed to sinter two sizes of particle metal powders. The comparison experiments and studies were conducted. The impact factors such as laser parameters, processing parameters on micro fabrication were analyzed. The laser power used to sinter fine particle powder is much less than coarse particle powder and the size of sintered part with fine particle is less and the accuracy is better. Through optimization in the parameters, a micro metal part was successfully fabricated.