Researches into Influence of Process Parameters on FDM Parts Precision

Abstract

In the field of RPM( rapid prototyping manufacturing), accuracy and efficiency have become the bottleneck that slows down its development, so how to improve parts precision has been one of the hot research questions. A variety of factors are analyzed which have effect on parts precision , such as extrusion temperature, envelope temperature, extrusion velocity, filling velocity, slicing orientation, slicing thickness, filament-width compensation, and delay time, and then corresponding measures to improve parts precision is presented.

Thermal Deformations of Thermoplast during 3D Printing: Warping in the Case of ABS

“…Lower nozzle temperature produced more cracks that were finally absent after middle of series. This observation is consistent with the empirical data presented by Peng and Wang [23], as well as Xu [28], with both papers pointing out that nozzle temperature is an important factor for print quality. Inspection of group F did not show any noticeable warping changes.…”

“…As visible on Figure 5 Ultimaker 3 printer used in this study did not feature heated or closed chamber, as too better reflect majority of budget printers, used by many researchers. This is in contrast to a series of studies on warping which concentrate on much more advanced, and therefore more expensive printers [12,13,16,18,[21][22][23]. With a cheaper device, colder air is circulating around the printout, increasing warping.…”

Experimental Study of ABS Material Shrinkage and Deformation Based on Fused Deposition Modeling

“…The main factors that affect the cracking are printing temperature, printing speed, number of layers, cooling temperature, etc. As print temperature is low, wire material is not sticky enough to connect and as the scanning speed of nozzle, or called the speed of space movement is higher than that of wire extruding, it can cause wire material stretched or broken as well as vibration of machine owing to fast speed,resulting in model cracking [5]. In addition, the interval between layers is determined by the number of layers, and with the number of layers less, the interval is larger, causing the adhesion of wire material is not good, so the adhesion between layers can be improved by increasing the number of layers.…”

Influence of 3D printing process parameters on the mechanical properties and mass of PLA parts and predictive models

“…The bowden type extrusion system of the printer used, in which the filament puller is located at a distance from the entrance of the heated nozzle, at high speeds may have its efficiency compromised, preventing the plunger action of the filament not yet processed (due to buckling effects of the material, for example) on the softened material mass to be extruded. In addition, higher print speeds can cause a stretch in the deposited material (Peng and Wang, 2010;Riva, 2013), which can also favour the formation of voids. In summary, they are phenomena that, by inducing the formation of voids, can collaborate to reduce mass.…”