Process and device for producing a weldment between the surfaces of two flat workpieces, with total running of the contacting surface of the friction stir tool into the surface of the second workpiece opposing the first workpiece

摘要

The method involves preparing the two workpieces in a stack (9) and placing the second workpiece on top of the first and setting up a friction tool (1) with its friction surface (4) on the top of the second workpiece remote from the first workpiece. The friction tool is then rotated to produce the welded connection whereby the friction surface rubs on the surface of the second workpiece remote from the first workpiece and the contact area between friction face and second workpiece is kept entirely within this surface area. The first workpiece bears against a heating element by its surface remote from the second workpiece. Independent claim describes device with rotational friction tool with friction surface placed on top surface of workpiece and a predetermined pressure applied by same to workpieces perpendicular to the workpiece plane. A laser can be provided.