Avaliação da tolerância dimensional em peças produzidas por manufatura aditiva em PETG em função da temperatura do bico extrusor

Abstract

Industry 4.0, also known as the fourth industrial revolution, is based on the transformation that occurs through the digital revolution, characterized by the convergence of innovative technologies, such as Additive Manufacturing (AM). AM has brought a wide range of advantages over conventional manufacturing, enabling the production of low-volume parts at a low cost. Additionally, one of the major advantages is the rapid development of projects and products through enhanced visualization of the final product, as well as the ability to reproduce complex geometries in a single step, involving different materials and processes. However, it is essential to strive for the evolution of quality control methods for printed products, particularly in terms of optimizing dimensional characteristics and ultimately improving the quality of the final product. In light of this, a set of experimental procedures was developed to enhance the understanding of dimensional quality of printed products using Fused Filament Fabrication (FFF) have the greatest influence on dimensional tolerance patterns of the parts when changing the extrusion temperature. Initially, a test specimen was designed and printed at three different temperatures, repeated three times, using a Creality Ender-3® printer. The dimensions were measured using a Mitutoyo caliper. The test specimens did not exhibit significant dimensional variations or relevant surface roughness. Among the six measured parameter values (Height 1, Height 2, Width, Depth, Internal Diameter, External Diameter) within the temperature range established in this research (225°C, 240°C, and 255°C), Width and Depth were the ones that presented the smallest dimensional deviation, the deviations ranging from 0.03% to 0.19% and the one that presented the greatest was the Internal Diameter, with deviations ranging from 1.29 % to 3.42 %.