Effect of Corrected Extrusion Flow Rate on Wall Thickness Error of MEAM Thin-walled Model

In order to solve the wall thickness error problem of filament-based extrusion additive manufacturing (MEAM) of thin-walled model and to improve the printing accuracy of MEAM thinwalled model.In this study, a square thin-walled model A was designed as the experimental specimen, and a wall thickness error correction method based on pre-experiment was proposed, by which the corrected extrusion flow rate R was calculated to be 92.8%.Model A was reprinted using the corrected extrusion flow rate (92.8%), and the wall thickness error of model A printed using the corrected extrusion flow rate was found to be significantly reduced by spiral micrometer measurement.When model A was observed through an industrial microscope, it can be seen from the sidewall surface detail diagram that the surface of model A printed with the corrected extrusion flow rate has no bumps, cracks and other structures, and the surface quality is better; moreover, it can be seen from the cross-sectional dimension diagram that the wall thickness (0.403 mm) of model A printed with the corrected extrusion flow rate (92.8%) is significantly reduced compared to the wall thickness (0.472 mm) of model A printed with the default extrusion flow rate (100%), and is close to the designed wall thickness (0.400 mm), which further verifies that the wall thickness error of the MEAM thin-walled model with the corrected extrusion flow rate has been significantly reduced.