| Popis: |
This chapter aims to provide a broad overview introducing all relevant concepts and terminology in Additive manufacturing (AM). Categories of AM methods are shown in accordance with internationals standards. In order to take advantage of any new technology, a thorough understanding of its capabilities and limitations is crucial. This chapter covers basic concepts of laser powder bed fusion (L-PBF) of metals. A workflow of part creation from design up to post-processing is shown. Schematic of L-PBF machine and commercially available L-PBF systems having the largest number of laser sources and the largest working volumes are presented. Lasers, scanning systems, powder delivery and deposition systems, base platform and base plate, powder removal, gas supply and filtration systems units are described. Software that is used for creation of a 3D model and for a build preparation as well as design optimization tools of L-PBF process are listed. The main parameters influencing the quality of L-PBF parts are described. Some commercially available powder materials are also presented, and safety aspects are mentioned. For students and new users, this chapter should act as a starting point before delving into more detailed chapters later in this book. This chapter of the book, similar to all subsequent parts, is accompanied by questions designed to help new users to master knowledge in additive manufacturing and in L-PBF of metals. |
