An introduction is given mainly of the welding of thin sheet materials and tailored blank materials to which friction stir welding (FSW) is expected to be applied in making hung-on parts expected to be used for the aluminium body. The tensile property, fatigue strength and toughness in FSW are about the same as or higher than those in conventional welding. The state of deformation and the amount of angular distortion for laser and MIG weld joints and FSW joints are compared. The angular distortion of FSW joints is very small, that is, 1/30 that of MIG joints and 1/20 that of laser joints. The effect of FSW conditions on tensile properties and Erichsen values is investigated by using 5052-H34 materials of 1 mm and 2 mm thickness. With both 1 mm thick and 2 mm thick joints, it is confirmed that the setting of the optimum conditions enables good quality joints to be obtained. With 1 mm thick joint, kissing bond (thermo-compression bonded part) occurred at the bottom section of the weldment. It is possible to eliminate kissing bond almost totally by optimising the length of the pin and the FSW conditions. The FSW method enables the welding of dissimilar aluminium alloys without any problems. The application of FSW is progressing rapidly in the shipbuilding, aerospace and automobile fields because no blowholes or cracking occur and distortion is small but joint strength is still high. The application to the aluminium body has not progressed because it is difficult to apply to the welding of two and three dimensional joints. Thinking of the high potential of FSW, it is expected to expand its applications to the products related to automobiles. With the development of FSW robots, it is predicted to be applied to aluminium bodies.
Application of friction stir welding to the car body
Welding International ; 17 , 4 ; 287-292
2003
6 Seiten, 16 Bilder, 4 Tabellen, 12 Quellen
Article (Journal)
English
Aluminiumlegierung , Aufhängung , Erichsen-Versuch , Ermüdungsfestigkeit , Feinblech , Flugzeugbau , Grobblech , Karosserie , Kraftfahrzeugbau , Laserstrahlschweißen , maßgeschweißtes Blechformteil , MIG-Schweißen , Raumfahrtindustrie , Rührreibschweißen , Schiffbau , Schweißverbindung , Stegabstand , Thermokompressionsbonden , Überlappnaht (Schweißen) , Zähigkeit (Werkstoff) , Zugfestigkeit
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