Abstract: A roof frame arrangement of a motor vehicle has a front, a rear and two lateral roof frames, and a supporting device for a motor vehicle tailgate. The supporting device includes a tailgate hinge and at least one gas-filled compression spring. At least the lateral roof frame contains an inner shell and an outer shell connected to the latter. A hollow space is formed between the inner shell and outer shell. In order to provide a roof frame arrangement having increased stiffness, which can be produced in a simple and space-saving manner and with as few manufacturing tolerances as possible and in which a relatively great outlay on leakproofness is not required, it is proposed to form a rear end region of the lateral roof frame as a single-piece, circumferentially closed hollow profile which encloses the hollow space there and forms a receiving housing in which at least one of the hinge and the gas-filled compression spring is fitted.

Abstract: A rear roof frame of a motor vehicle has a tailgate which is fastened to the roof frame and includes an upper shell and a lower shell which is fitted to the latter. For the design of a rear roof frame, which, in spite of the shell-type construction, provides, in a simple manner and lightweight construction, sufficient torsional and flexural stiffness in order to withstand high mechanical stresses, it is proposed to arrange within the shell structure a hollow profile which leads in each case from the transition region to the lateral roof frame and parallel to the longitudinal extent of the structure, and emerges, at least at the end facing away from the lateral roof frame, in a knee which kinks in the front-end direction of the vehicle. The end of the rear roof frame forms a tubular hollow profile of the lateral roof frame, which is connected to the hollow profile of the rear roof frame.

Abstract: The invention relates to a rear roof frame of a motor vehicle, having a tailgate which is fastened to the roof frame, the rear roof frame comprising an upper shell and a lower shell which is fitted to the latter.

Abstract: A method is disclosed for joining an electrical contact of minor thermal function to a high-power diode laser bar, comprises the step of joining the contact and the HDB by a joining material containing an adhesive. A high-power diode laser bar-contact arrangement comprises a high-power diode laser bar, an electrical contact of minor thermal function and a joint zone between the HDB and the contact. The joint zone contains a joining material with an adhesive. The disclosure also describes a high-power diode laser comprising an HDB, two electrical contacts of minor thermal function and two joint zones between the contacts and the HDB. The joint zones contain joining materials with adhesives. A high-power diode laser stack is also described.

Abstract: A method and an apparatus are provided for internal high-pressure forming of a workpiece in a closed internal high-pressure forming die. The workpiece is expanded owing to the internal high fluid pressure exerted by a pressure generator and coming to rest on the cavity of the forming die. The workpiece and the forming die form friction partners in the areas of contact. In order to improve process reliability during the internal high-pressure forming of workpieces and to expand the scope of the method, vibration is imparted directly to at least one of the friction partners by a vibration generator during forming.

Abstract: A device for manufacturing a hollow body from two plates. The device includes an internal high pressure forming tool having an interior surface defining a mold chamber corresponding to a shape of the hollow body. The forming tool being arranged to receive two plates resting against each other. An expansion lance is insertable between the plates via an axial drive, and the expansion lance and the axial drive forming a pushing plunger. The expansion lance has a pinching section along a circumferential contour, and the plates to be pinched are arranged between the pinching section and the forming tool. The expansion lance includes a feed bore communicable with a high pressure fluid source. The expansion lance defines an axial stop to abut axial edges of the plates. The axial stop has a radial periphery which is smaller than that of the mold chamber.

Abstract: A method and a device for manufacturing a hollow body from two plates, which are placed against one another and inserted into an internal high pressure forming tool. After the forming tool is closed, a fluid is introduced under high pressure between the plates by way of an expansion lance inserted between the plates. The plates are expanded until they abut the interior surfaces of the forming tool that match the shape of the hollow body. To achieve a process-reliable manufacture of the hollow body, the plates, before any internal high pressure is developed, are pinched in the thickness direction along the circumference of the opening that surrounds the inserted expansion lance by cooperation between the dies of the forming tool and the circumferential contour of the expansion lance that is oversize relative to the location between the plates at which the expansion lance is introduced.

Abstract: A method and a device for manufacturing a hollow body from two plates, which are placed against one another and inserted into an internal high pressure forming tool. After the forming tool is closed, a fluid is introduced under high pressure between the plates by way of an expansion lance inserted between the plates. The plates are expanded until they abut the interior surfaces of the forming tool that match the shape of the hollow body. To achieve a process-reliable manufacture of the hollow body, the plates, before any internal high pressure is developed, are pinched in the thickness direction along the circumference of the opening that surrounds the inserted expansion lance by cooperation between the dies of the forming tool and the circumferential contour of the expansion lance that is oversize relative to the location between the plates at which the expansion lance is introduced.