Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
DESIGN DEVELOPMENT OF A CERAMIC DLP 3D PRINTER INTEGRATING QFD AND TRIZ
Submission Author:
Italo Leite de Camargo , SP
Co-Authors:
Italo Leite de Camargo, Zilda de Castro Silveira, Rogério Erbereli, João Fiore Parreira Lovo, Carlos Fortulan
Presenter: Italo Leite de Camargo
doi://10.26678/ABCM.COBEM2021.COB2021-1086
Abstract
Additive manufacturing (AM) of ceramics allows the fabrication of complex ceramic parts on a small series without the high costs of molds. However, most commercial 3D printers capable of manufacturing ceramics are costly. Among the AM processes, Digital Light Processing (DLP) stands out for its ability to produce complex high-performance ceramic parts. In this work, a ceramic DLP 3D printer was designed integrating quality function deployment (QFD) and theory of inventive problem solving (TRIZ) methods. The user’s requirements were obtained from questionnaires applied to stakeholders of small industries and research laboratories and translated to technical design requirements. Next, their interrelation was analyzed, indicating technical contradictions from the demand for low-cost equipment with adequate precision and productivity. Applying TRIZ, each contradiction was converted into a pair of engineering parameters and then the contradiction matrix indicated possible principles of invention, of which “another dimension”, “dynamics”, and “preliminary action” emerged. Thus, a DLP 3D printer with an innovative recoating system was proposed in which two blades with sequential and distinct functions, with automatic active blade change, would create constant and homogeneous layers. A prototype was built and tested with highly loaded photosensitive ceramic suspensions (solid loading of 40 vol% and viscosity over 2 Pa.s ), producing ceramic green parts with complex features and high relative density after the post-processing (over 95%). Thus, the proposed design proved capable of producing advanced ceramics parts, being an economical and viable alternative for use in laboratories and small businesses.
Keywords
Additive manufacturing, Ceramics, Design, QFD, TRIZ
