Author/Authors :
Bisadi، H نويسنده Assistant Professor, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran , , Rasaee، S نويسنده Ph.D Student, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran , , Farahmand، M نويسنده MSC Student, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran ,
Abstract :
Considering the developing role of the friction stir welding in manufacturing industry fully study of the process is necessary. Study the each stage of the process in particular shows a better understanding of friction stir welding and specially friction stir spot welding. In this study plunge stage has been studied by experimental and numerical methods. A three-dimensional FEM model by using the commercial code DEFORM 3D is proposed to study the temperature dissipation around the tool during the plunge stage. The heat sources proposed in the model involve the friction, between the workpiece and the tool shoulder and the tool pin, as well as plastic work. Experiments were performed on aluminium 7050 plates with coincident measurement of temperature. The effect of rotational speed and geometric size of the tool have been studied on thermal history and temperature dissipation. The simulation results are compared with the experimental results and deduced that they are in good agreement. The model results are compared with other researcher models and concluded that the present model is more accurate.
