Practical implementation of laser polishing on additively manufactured metallic components
Practical implementation of laser polishing on additively manufactured metallic components
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DOI：
10.2351/7.0000222
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发表时间：
2020-11-01
影响因子：
2.1
通讯作者：
Hand, Duncan P.
中科院分区：
文献类型：
--
作者：
McDonald, Mark W.;Gora, Wojciech S.;Hand, Duncan P.
由于近年来金属粉末增材制造作为一种生产工艺的不断普及，人们越来越多地研究如何提高以这种方式制造的零件的表面质量。激光抛光由于其灵活性和自动化的适用性，作为一种精加工技术提供了巨大的潜力。然而，可以用增材制造工艺生产的部件的复杂性在开发用于实施激光抛光工艺的实用且灵活的布置方面提出了挑战。在本文中，我们提供了使用弱聚焦光束管理零件高度变化的方法，使用旋转台处理（大致）圆柱形部件，以及使用简单光学器件抛光内表面。作为一个应用实例，我们提出了使用低成本光纤传输二极管阵列激光器在60 s内将增材制造的钴Chrome牙科植入物精加工到0.45 μ m的表面粗糙度。
Due to the continually increasing popularity of metal powder-based additive manufacturing as a production process in recent years, there has been growing research into improving the surface quality of the parts manufactured in this way. Laser polishing offers great potential as a finishing technique due to its flexibility and suitability for automation. However, the complexity of components that can be produced with additive manufacturing processes presents challenges in developing practical and flexible arrangements for implementing a laser polishing process. In this paper, we offer methods to manage height variations of parts using weakly focused beams, process components that are (roughly) cylindrical using rotational stages, and polishing of internal surfaces using simple optics. As an example application, we present finishing of additively manufactured cobalt chrome dental implants to a surface roughness of 0.45 mu m in only 60 s using a low-cost fiber delivered diode array laser.