Abstract: A device (1) is provided for connecting a metal sheet (23, 33?) at the edges, particularly body sheet metal in automobiles. The device (1) includes at least one folding bed (2) for receiving at least two metal sheets, folding jaws (3) which are functionally connected to associated folding jaw supports (4), at least one thermal jointing tool (5), and at least one mass electrode (9, 9?). At least the joining tool is not attached to the folding jaws, and the joining tool contains a lever oriented away from the folding bed as a linear feed device. The lever (6) has a center of rotation (10) outside the folding bed, wherein the joining tool can swivel in the manner of a knee lever into an operating and/or non-operating position.

Abstract: The invention relates to a machining device for machining a workpiece (W), wherein a rotatably mounted machining tool (2a) is held in a machining unit (2), and the machining unit (2) can be moved axially along the axis of rotation (X) of the machining tool (2a) by means of a feed device (10). The machining device comprises a pressure plate (6), mounted in a freely movable manner by means of a bearing device (4), and a measuring device (8) for position detection. According to the invention, the pressure plate (6) and the bearing device (4) constitute part of a pressure-exerting unit (12), and the pressure-exerting unit (12) can be moved axially with respect to the machining unit (2) in the direction of the axis of rotation (X) and independently of the machining unit (2) by means of a drive device (14) assigned to said pressure-exerting unit.

Abstract: The invention relates to a machining device for machining a workpiece, wherein a rotatably mounted machining tool (2a) is held in a machining unit (2), and the axis of rotation (X) of the machining tool (2a) can be aligned with the workpiece surface to be machined, and therefore the axis of rotation (X) coincides with the geometric normal (N) in the machining point of the workpiece surface. The machining device comprises a pressure plate (6) mounted in a freely rotatable manner on the machining device via a bearing device (4), and a measuring device (8) for detecting a deviation in the position of the pressure plate (6). According to the invention, the bearing device (4) has a bearing body (40b) having at least one spherical surface region, and a bearing receptacle (40a) which surrounds the bearing body (40b) at the spherical surface regions in a form-fitting manner.