Abstract:
A welding material in positioned in electrically conductive relation between exterior surface portions of first and second weldable members (18, 22), such as hydroformed tubes, at a location where the first and second weldable members are to be joined. A welding device comprises first and second electrodes or conductive ends (46, 48) that extend along substantially the entire extent of first sides of the first and second weldable members, respectively. The first and second conductive ends include first and second concave recesses (158), which nest with the first and second weldable members (18, 22), respectively. Axial pressure and electrical current are applied across the first and second weldable members by the nesting first and second conductive ends. The applied current melts the welding material and thereby welds the exterior surface portions to one another. The welding device can be mounted on a robotic mechanism, which can move the welding device between first and second welding positions.
Abstract:
Die Erfindung betrifft ein Verfahren zum Laserschweißen von Blechformteilen mit Schweißflanschen, insbesondere von Karosserieteilen für Kraftfahrzeuge. Es ist Aufgabe der Erfindung, ein gattungsgemäßes Verfahren zum Laserschweißen von Blechformteilen 1 mit Schweißflanschen 15 zu schaffen, bei dem Korrekturen von Ungenauigkeiten bei Maßen und Formen der zu verschweißenden Blechformteile 1 möglich sind sowie Beschädigungen der Blechoberfläche vermieden werden. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Blechformteile 1 flanschfrei gespannt werden; dass die Spannung lage- und/oder kraftgeregelt in Abhängigkeit vom Soll/Istwertvergleich der Maße und/oder der Oberfläche des geschweißten Blechformteiles 1 erfolgt; dass die Schweißflansche 15 jeweils an der Schweißstelle wandernd aneinander gepresst und dort fortlaufend oder absatzweise verschweißt werden.
Abstract:
A method of lap welding for producing a welded lap joint (110) having good integrity, high peel strength, high tensile strength, high fatigue resistance, where the overlapped sheets (30, 32) are fused together across their region of overlap (50). Before welding, one sheet (30) is overlapped with another sheet (32) forming a lap joint (94). Preferably, the width of overlap is at least 50 % of the thickness of the thinnest sheet and no greater than twice the thickness of the thickest sheet. During welding, a high energy density radiation beam (34) is trained on at least one of the sheets and is acutely angled relative to the plane of overlap (56), which coincides with the weld interface (48) of the sheets (30, 32). Preferably, the sheets (30, 32) can be oriented relative to the direction of gravity such that the plane of overlap (56) of the sheets (30, 32) is acutely oriented relative to gravity so that during welding the direction of gravity influences formation, geometry and flow of a molten weld nugget (102). To join the sheets (30, 32), the beam (34) is trained on at least one of the sheets for a sufficient period of time and with a sufficient energy density to weld the sheets (30, 32) together completely from front to back of the overlap (56) producing a weld (110) having high peel strength with no unfused lip across the overlapping area. After welding is completed, the sheets (30, 32) can be formed using any conventional forming or any shaping process.
Abstract:
The method comprises introducing a tip (40) of a solid phase welding tool (126) between adjacent surfaces of a crack (132) formed in an aircraft skin. The tool (126) is then operated to produce a friction stir weld so as to weld the adjacent surfaces together and thereby repair the crack (132). Apparatus for performing the method comprises a base (50) having carriage (55) thereon, the arm (76) being pivotally mounted on the carriage (55) and supporting the friction stir welding tool (126). The position of an arm (76) can be adjusted by a screw (94) which drives the rotating tip (40) of friction stir welding tool (126) into the crack (132) to be repaired. The carriage (55) is then moved along the base (50) to draw the tip (40) along the crack. The apparatus is portable and is particularly useful for repairing a cracked skin on an aircraft.
Abstract:
A laser welding method and apparatus includes a laser manipulator that directs a laser beam emitted from a laser generator at various predetermined angles toward predetermined positions within a laser work zone. A transport device passes workpieces through the laser work zone where the laser beam manipulator can direct a laser beam at desired interfacing portions of each workpiece to weld those interfacing portions together. The controller is programmed to cause the manipulator to weld the workpieces without halting their motion through the laser work zone.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Heizeinrichtung (1) zur Wärmebehandlung von Werkstücken (2), insbesondere zum Gelieren oder zum Erwärmen von Bördelbereichen (18) an Fahrzeugkarosserieteilen. Die Heizeinrichtung (1) besitzt ein oder mehrere Heizkörper (24), mit denen das Werkstück (2) konduktiv erwärmt wird. Die Heizkörper (24) sind der Werkstückkontur nachgeformt und lassen sich zur örtlichen Veränderung des Wärmeeintrags am Werkstück (2) einzeln positionieren. Die Heizkörper (24) werden ihrerseits induktiv erwärmt.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Heizeinrichtung (1) zur Wärmebehandlung von Werkstücken (2), insbesondere zum Gelieren oder zum Erwärmen von Bördelbereichen (18) an Fahrzeugkarosserieteilen. Die Heizeinrichtung (1) besitzt ein oder mehrere Heizkörper (24), mit denen das Werkstück (2) konduktiv erwärmt wird. Die Heizkörper (24) sind der Werkstückkontur nachgeformt und lassen sich zur örtlichen Veränderung des Wärmeeintrags am Werkstück (2) einzeln positionieren. Die Heizkörper (24) werden ihrerseits induktiv erwärmt.
Abstract:
Die Erfindung betrifft eine Spannvorrichtung (5), insbesondere für die Herstellung einer Verbindung der Randbereiche von Außenblech und Innenblech einer Kfz-Tür (10) oder einer Kfz-Klappe, mit wenigstens einer in einem Gestell (3) geführten Formbacke (1), an der ein Antrieb angreift. Damit die Endlage der Formbacke (1) und damit die Lage einer Verbindungsnaht zwischen den zu verbindenden Blechteilen exakt und reproduzierbar eingestellt werden kann, soll die Formbacke (1) an einem exzentrisch an einer gestellfesten Achse angeordneten Spannglied abgestützt und geführt sein, das einen Befestigungsarm (6) aufweist, an dem ein Stelltrieb angreift, wobei das Spannglied eine darin exzentrisch angeordnete Bohrung für eine verstellbare Exzenterbuchse aufweist, die exzentrisch auf der gestellfesten Achse gelagert ist. Weiterhin soll eine Einrichtung zum Fixieren der relativen Stellung von Spannglied und Buchse vorgesehen sein.
Abstract:
A method of lap welding for producing a welded lap joint (110) having good integrity, high peel strength, high tensile strength, high fatigue resistance, where the overlapped sheets (30, 32) are fused together across their region of overlap (50). Before welding, one sheet (30) is overlapped with another sheet (32) forming a lap joint (94). Preferably, the width of overlap is at least 50 % of the thickness of the thinnest sheet and no greater than twice the thickness of the thickest sheet. During welding, a high energy density radiation beam (34) is trained on at least one of the sheets and is acutely angled relative to the plane of overlap (56), which coincides with the weld interface (48) of the sheets (30, 32). Preferably, the sheets (30, 32) can be oriented relative to the direction of gravity such that the plane of overlap (56) of the sheets (30, 32) is acutely oriented relative to gravity so that during welding the direction of gravity influences formation, geometry and flow of a molten weld nugget (102). To join the sheets (30, 32), the beam (34) is trained on at least one of the sheets for a sufficient period of time and with a sufficient energy density to weld the sheets (30, 32) together completely from front to back of the overlap (56) producing a weld (110) having high peel strength with no unfused lip across the overlapping area. After welding is completed, the sheets (30, 32) can be formed using any conventional forming or any shaping process.
Abstract:
A method for assembling bodywork parts, wherein at least two separate members are delivered to a geometrical positioning station, held by positioning tools thereof in predetermined relative positions with an overall arrangement determined with respect to a reference point in the station, and joined together, e.g. by welding. The assembly method comprises the steps of combining at least one of the members (200) with a holder (201) comprising devices (212, 213, 214) for gripping the member, devices (202, 203, 204) for coupling it to at least one handling device, and devices (205, 211, 220) for indexing said member through the reference point of the geometrical positioning station; delivering the member (200) to the geometrical positioning station by means of said holder (201); indexing the member through the geometrical positioning station by means of the holder by actuating the positioning tools so that they interact partly with the member (201) and partially with the holder to complete the positioning of said member, and optionally by releasing some but not all of the gripping devices (212, 214), and joining the members together.