Hand-held machine for removing a friction-welded element from a component assembly

Hand-held machine (10, 10) for removing a friction-welded element, having a head, from a component assembly, wherein the hand-held machine (10, 10) comprises a machine housing (12) and a drive unit (14) which is received therein, wherein, furthermore, an attachment device (20, 120) is provided which is connected to the machine housing, wherein the attachment device comprises, furthermore, a telescopic element (22, 122) which has a first component (24, 24), arranged free from movement relative to the machine housing, and a second component (26), arranged movably in the axial direction relative to the first component, wherein the second component is prestressed in the axial direction in the pressing direction against the machine housing, furthermore, the attachment device has a tool drive shaft (30, 130) which is driven via the drive unit, wherein the tool drive shaft is mounted rotationally on the second component by a bearing element (38, 138) and is guided axially movably relative to the second component, wherein the second component has a contact element (36, 136), by way of which the second component can be placed onto the component assembly, wherein a machining tool (32, 132) is connected to the tool drive shaft, wherein. furthermore, a stop (50, 150), by which the drilling depth is limited, acts between the second component and the machine housing.

Method for repairing a friction-welded joint (200) comprising a friction-welded element (210) having a head and a shank, the head having a head diameter and the shank having a shank diameter, the friction-welded element (210) connecting a base layer (220) to at least one top layer (240), characterized in that the shank of the friction-welded element (210) is removed with a hand-held machine having a machining tool, by passing the rotating machining tool through the head of the friction-welded element (210) in the direction of the shank, and drilling a blind hole to a depth at which the weld zone (230) of the friction-welded element (210) with the base layer (240) is located, wherein the outside diameter of the machining tool is at least equal to the outside diameter of the shank of the friction-welded element (210), wherein, after completion of the drilling operation, a new friction-welded element (210) is inserted to form a friction-welded joint (230) with the bottom of the blind hole.