By Andreas Gebhardt, Jan-Steffen Heotter
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This division is also intended to separate the representation of basic principles valid for a longer term from machine concepts that change more quickly. In reality, however, overlaps and repetitions are unavoidable. 1 Basic Principles of the Additive Manufacturing Process All additive manufacturing (AM) models are built by joining single layers of equal thickness. The layer is shaped (contoured) in an x-y plane two-dimensionally. The third dimension results from single layers being stacked up on top of each other, but not as a continuous z coordinate.
To implement the additive manufacturing principle, several fundamentally different physical processes are suitable. Based on systematic observation, the difference has proven to be the physical state of the starting material as it is introduced into the machine. 1 Solidification of Liquid Materials In the field of additive manufacturing technology, currently non- or low-crosslinked monomers of the type acrylate, epoxy, or vinyl are used as liquid original materials in ambient conditions. They are locally cross-linked by ultraviolet radiation to form solid layers and components.
2 Generation of Layer Information system-neutral form of data transfer. In contrast, a slice file contains additional machine-specific information on the geometric data and is not exchangeable between the various additive manufacturing systems. All contour-oriented formulations define the contour cuts directly into the respective z coordinate of the 3D CAD model and cut at the mathematically precise object [Fockele, 94]. These constitute the 2D information. The established plotter software formats are based on HPGL files (Hewlett Packard graphic language) or similar standard formulations.
Additive Manufacturing. 3D Printing for Prototyping and Manufacturing by Andreas Gebhardt, Jan-Steffen Heotter