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 locatio n is easily controlled. Said aim is achieved whereby the cooling fluid from a cooling ring (2), moving with the pin tool (1), is physically limited to bei ng sprayed on the trailing region and the lateral region of the welding locatio n adjacent to the pin tool (1). Additionally, a gas jet (3) moving with the pi n tool (1), blows cooling gas from the front against the pin tool (1) and against the cooling water escaping from the cooling ring (2).