Interlayer closed-loop control of forming geometries for wire and arc additive manufacturing based on fuzzy-logic inference

The deposition process of wire and arc additive manufacturing (WAAM) is usually planned based on a bead geometry model (BGM), which represents the relationship between geometries (e.g. width, height) required parameters. However, actual situation may deviate from one in BGM built, such as varied heat dissipation conditions, resulting morphological changes deposited beads geometrical errors formed parts. In this paper, novel control mechanism for enhancing fabrication accuracy WAAM fuzzy-logic inference proposed. It considers measured already layers context to adjust parameters subsequent layer, forming an interlayer closed-loop (ICLC) mechanism. This paper not only presents theoretical fundamentals ICLC but also reports technical details about utilizing height multi-layer multi-bead (MLMB) components. A machine was applied core component calculating speed change error previously change. terms validation, effectiveness proposed implemented controller investigated through both simulative studies real-life experiments. fabricated cuboid blocks showed good with maximum 0.20 mm. experimental results implied that approach facilitates continuity WAAM, thus enables automation robotic manufacturing.