Method and device for friction stir welding with simultaneous cooling

摘要

The aim of the invention is to achieve a method for friction stir welding, whereby the welding of alloys with high oxygen affinity and/or high plasticisation energy is possible and the heat flux from the welding location is easily controlled. Said aim is achieved whereby the cooling liquid from a cooling ring (2), moving with the pin tool (1), is physically limited to being sprayed on the trailing region and the lateral region of the welding location adjacent to the pin tool (1). Additionally, a gas jet (3) moving with the pin tool (1), blows cooling gas from the front against the pin tool (1) and against the cooling water escaping from the cooling ring (2).