Method for joining parts of workpieces by means of an energy beam, particularly a laser beam, using an additional material is supplied as a wire by means of a wire supply, in which wire tip which is melted in the energy beam is guided by frictionally along the surface of the workpiece, characterized in that a feed path of a machine guide contour of a joint defined palpated by parts of workpieces (7, 8; 9, 10) which are to be joined via the wire tip in the edge of the weld pool, wherein the wire is also used as a mechanical feeler element, and wherein a) the energy beam (1) is focused by a device that moves together with the wire supply device automatically, being movable wire supply device so the device relative to the approach r ay laser, and the reference point for tracking the focus of the energy beam over the solder bath, or b) the wire tip (4) melting in the energy beam (1) being arranged guided by frictionally along a lateral guide surface of the joining groove formed by the parts of workpieces (7, 8; 9, 10) to be joined, being followed the energy beam (1) and the delivery device wire are coupled fixedly to one another by means of a linear displacement and / or by a rotational movement of manner on the lateral guide surface.
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