FRICTION STIR SPOT WELDING DEVICE AND FRICTION STIR SPOT WELDING METHOD

摘要

A friction stir spot welding device according to the present invention, which softens articles (60) to be joined by frictional heat and joins them by stirring, is provided with: a tool formed in a circular cylindrical shape and constituted such that rotation around an axial line and forward/backward movement in a direction along the axial line are possible; a temperature detector (21) for detecting the temperature of the tool when the joining process of the articles (60) to be joined begins; and a controller (51) constituted so as to compare the temperature of the tool detected by the temperature detector (21) and a reference temperature and to set pressing force that the tool applies to the articles (60) to be joined.