Abstract: A compression mold for use in a compression molding tool, is manufactured by an additive manufacturing method, particularly electron beam melting, selective laser melting, or selective laser sintering. A method for manufacturing a compression mold for use in a compression molding tool includes forming a compression mold body of the compression mold with an additive manufacturing (AM) method.

Abstract: Illustrated and described is a friction stir welding device for mounting on a handling device. The object that the forces and moments which have to be absorbed by the handling device during the welding operation in the course of the movement of the friction stir welding tool along the weld seam are independent of the welding operation is achieved by a friction stir welding device with a tool drive, with a mounting element for connection to the handling device, with a friction stir welding tool, which is driven by the tool drive in a rotating manner about an axis of rotation, with a counterbearing roller and with a counterbearing drive, the counterbearing drive driving the counterbearing roller in a rotating manner about a counterbearing axis and the circumferential surface of the counterbearing roller being arranged opposite the friction stir welding tool.

Abstract: An apparatus is proposed for connection of workpieces using the friction stir welding method, with a shaft (33, 33?) which can be driven such that it rotates and at whose end remote from the drive end of the shaft a pin-like projection (8) is arranged, at whose end a first stop, which is formed by a first shoulder (6), is arranged, with the first shoulder having a diameter which is larger than the diameter of the pin-like projection (8), and with a second stop (7, 7?), which is formed from a second shoulder and is arranged such that the workpieces (19) to be connected can be enclosed between the stops (6, 7, 7?), in that at least one of the stops can be moved translationally in order to enclose the workpieces (19) with a predetermined force in the direction of the other stop.