Threaded pin efects analysis on forces in FSW

Tool geometry is a key parameter in welding by friction stir, as afect the material-tool interface and infuences the forces involved in the procedure. The forces are related to weld quality, efciency, machine capacity, and control of the process. However, the number of models proposed in the literature to describe the forces, considering the infuence of one of the most common tool pin shape, is not enough. This paper studies the efects of the threaded tool pin on the forces, for diferent velocities of the process by modeling and experimental analysis. Mechanistic models are proposed to describe the axial force, in the plunging and welding phases, and the welding force for a threaded tool pin considering the process velocities. The inverse problem method is implemented to estimate unknown parameters and adjust the models. To determine the infuence of the threaded pin, the models and experimental results are compared with previously published models. The experimental data for the smooth pin was carried out for the same material, velocities, and tool geometry. The results show that the threaded pin increases around 10% the maximum axial force. Additionally, the threaded pin reduces the welding force for the most used rotational speed and the power consumption associated with the motion in the welding direction. The proposed models can be easily implemented in the industry and used for tool design and process planning

• Autores: Quintana, Karen J; Silveira, José Luis L.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2021
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/13922
• Acceso en línea: https://hdl.handle.net/10614/13922; https://red.uao.edu.co/
• Palabra clave: Fricción (Mecánica); Friction; Threaded pin forces; Friction stir welding; Mechanistic models
• Rights: openAccess
• License: Derechos reservados - Springer Nature Switzerland, 2021