Calibração e sincronização do sistema de impressão 3D para construção civil com bomba de cavidade progressiva

Abstract

3D printing for construction (3DCP) offers several advantages such as reduced construction time, reduced waste of materials, and labor compared to conventional techniques. Various types of pumping systems can be used for 3D printing with mortar, with the use of progressive cavity pumps (PCP) being the most recommended technique as it is a pump capable of projecting materials with high viscosities continuously. One of the problems with 3DCP is the synchronization of various systems: the pumping system (composed of the frequency inverter and the PCP), the movement of the printing gantry, the slicing parameters of the parts, the firmware parameters of the printer control along with a specific mortar composition. Therefore, the general objective of this research is the synchronization and calibration of the complete 3D printing system for civil construction, and as specific objectives, it also addresses details such as times associated with each stage, analyzes the quality of the printed paths and layer stacking. The method used involves the prior calculation of the parameters associated with each stage of the system and then the experimental test for the final system calibration. As a result, this research highlights the need for a short rampup time for the frequency inverter speed to prevent jams in the BCP, real-time printing speed calibration to adjust the quality of the printed paths, and attention to the consistency of the printing mass and its compaction at the system inlet to prevent bubbles and jams