Defects Reduction in the Robotic Layup Process

Abstract:

Robotic layup is a novel process developed to face the increasing demand for automation, flexibility, repeatability, and achieving high-quality composite materials in relevant industry fields, such as aerospace and automotive. This process is based on laying prepreg tissues on a mold using the action of a robotic arm equipped with a specific end-effector, which is usually composed of rollers and punches. The main drawback of the robotic layup is the occurrence of wrinkles and defects while moving, placing, and processing the pre-impregnated tissues. This issue is particularly evident in the processing of complex-shaped surfaces. The robotic arm cannot replicate exactly the movement of a human operator, following the geometry of the surfaces with a proper angulation like a human wrist. Moreover, operator hands can be set in a different shape just changing the configuration of the fingers, adapting themself in different curvatures. The demand of the industry to improve automation requires that the robotic manufacturing systems replicate as much as possible the gesture of the operator. In this study, an end-effector capable to replicate the human movements during the hand layup of fibrous tissues or fabrics has been conceptualized.

• Periodical: Key Engineering Materials (Volume 926)
• Pages: 1437-1444
• DOI: https://doi.org/10.4028/p-7v9349
• Online since: July 2022
• Authors: Antonio Gambardella*, Vitantonio Esperto, Fausto Tucci, Pierpaolo Carlone
• Keywords: Automated Layup, Fiber Placement, Robot Manufacturing Defects, Robotic Arm, Robotic Layup, Wrinkles

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