Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Robotic Additive Manufacturing System: Study of the influence of motion parameters on the mechanical properties of 3D-printed tensile specimens
Submission Author:
Rafaela Silva Barbosa , SP , Brazil
Co-Authors:
Rafaela Silva Barbosa, João Fiore Parreira Lovo, Sidney Bruce Shiki, Gustavo Barbosa
Presenter: Rafaela Silva Barbosa
doi://10.26678/ABCM.COBEM2023.COB2023-1353
Abstract
Nowadays, Additive Manufacturing (AM) is responsible for the fabrication of parts in several areas, such as health, civil construction, mechanical engineering, aerospace, and domestic use. Furthermore, with the advance of 3d printing, the development of highly complex geometries has become much easier, at least for small parts. The current paper presents a specific study on the application of a 6-axis robotic manipulator for additive manufacturing aiming to the fabrication of large parts and taking advantage of the accuracy and repeatability of the robotic system. A Yaskawa GP-88 robot is equipped with a mono-screw polymer extruder that is fed by plastic pellets. The use of a 6-axis robot can also increase the ability to reach places where a conventional 3D printing process would not be able, as often the motion is based on a platform with limited number of degrees of freedom. In the present study, Siemens NX CAD software was used to generate the geometry of ASTM D638 tensile test specimens. The Ultimaker Cura software was used to slice the geometry and generate the G-Code, while the RoboDK software was used to obtain the offline programming code to drive the Yaskawa GP88 robotic manipulator. The focus of the present research was especially on the influence of the motion of the robotic manipulator on the mechanical properties of 3d-printed parts. In this sense, the extruder was fed with PLA pellets, the velocity of the robot was varied in 10, 15, and 20 mm/s, and the filling rate of the parts was set to 20, 40, and 60%, the print pattern adopted was linear, and other parameters were kept constant and programmed aiming the processing of PLA. For each combination of velocity and filling rate, two specimens were fabricated, thus obtaining a total of 18 tensile test parts. An analysis of variance statistical test (ANOVA) was applied to understand the influence of the printing parameters on the mechanical properties of the tensile specimens. At the end of the study, the main advantages and drawbacks of the proposed robotic additive manufacturing system are highlighted.
Keywords
Additive manufacturing, Robotic manipulator, Mechanical Properties
