Improving the Accuracy and Precision of the Fused Deposition Modelling Additive Manufacturing Technology

点击翻译按钮获取中文摘要

Additive manufacturing (AM) is an attractive alternative to conventional manufacturing techniques due to its geometric freedom and versatility. Fused deposition modelling (FDM) is a relatively low cost form of AM, which is able to produce complex features via layer-by-layer extrusion, however, it is commonly characterised by poor quality. Thus, this project investigates how the dimensional, geometrical accuracy, and repeatability (precision) of the FDM process could be improved through the evaluation and modifications of its current mechanisms. These mechanisms include the filament behaviour characterised via the extrusion method, a set of design rules to reduce errors in part design, and revision of the slicing software that takes in to account the filament level behaviour. It is also envisaged that adjustments to the current equipment set-up, such as nozzle positioning and an experimental investigation into parameter optimisation will also be undertaken to elucidate errors and inaccuracies in part generation.