The end portion of a first member includes a plate part and a groove. The end portion of a second member includes an edge and two side surfaces. The groove extends around the edge of the second member and the two side surfaces. The groove includes a side surface including an engaging portion. One of the side surfaces of the end portion of the second member includes an engaged portion. A method for manufacturing a swaged structure includes preparing the first member including the plate part and the groove having a wide opening. The method further includes inserting the end portion of the second member into the groove after preparing the first member. The method further includes pressing the plate part in a direction narrowing the opening of the groove to bring the engaging portion into contact with the engaged portion after inserting the second member.
B21D 39/02 - Utilisation de procédés permettant d'assembler des objets ou des parties d'objets, p. ex. revêtement par des tôles, autrement que par placageDispositifs de mandrinage des tubes des tôles par pliage, p. ex. jonction des bords d'une tôle pour former un cylindre
B21D 53/88 - Fabrication d'autres objets particuliers d'autres parties de véhicules, p. ex. capots, garde-boue
B60J 5/04 - Portes disposées sur les côtés du véhicule
2.
Vehicle door frame and inner member for vehicle door frame
A vehicle door frame includes an outer member and an elongated inner member. The inner member includes an extended portion, which extends in an outward direction of the vehicle, and an edge portion, which includes a distal end surface. A protrusion is formed on the distal end surface. The protrusion protrudes in the outward direction of the vehicle and is located at a predetermined position of the inner member in the longitudinal direction. The folded portion has a facing portion that faces the distal end surface. The protrusion can be melted by heating by the concentration of electric current during resistance welding and is configured to pressurize and join the distal end surface and the facing portion of the folded portion to each other. The protrusion includes a tip end, which has an arcuate cross section protruding in the outward direction of the vehicle.
A roll forming method includes: performing a cross-section forming process to causing a steel strip, to pass through a forming roll die so that a cross-sectional shape of the steel strip is formed into a predetermined cross-sectional shape; performing a heating process of heating the steel strip to a first temperature that is equal to or higher than an austenitizing temperature; performing a preliminary cooling process of cooling the steel strip to a second temperature lower than the austenitizing temperature and equal to or higher than a martensite transformation point; performing a cross-section correcting process of causing the steel strip to pass through a correction roll die and correcting the cross-sectional shape of the steel strip, and performing a main cooling process of cooling the steel strip having passed through the correction roll die to a third temperature lower than the martensite transformation point.
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
B21D 5/08 - Cintrage des tôles le long de lignes droites, p. ex. pour former un pli simple par un procédé d'étirage dans lequel les pièces à travailler sont mises en forme par passage entre des matrices ou des rouleaux, p. ex. fabrication de profilés utilisant des rouleaux de formage
C21D 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
C21D 9/60 - Fours continus pour bandes ou fils métalliques avec chauffage par induction
C21D 1/18 - DurcissementTrempe avec ou sans revenu ultérieur
A belt line reinforcement is provided with a first flat plate which is formed in a flat shape so as to extend in the belt line direction of a vehicle door by folding and overlapping the width direction center part of a belt-like plate along the lengthwise direction, a second flat plate which is formed in a flat shape so as to extend in the belt line direction by overlapping and joining both ends of the belt-like plate in the lengthwise direction, and a cylindrical part formed between the first flat plate and the second flat plate and formed in a cylindrical shape so as to extend in the belt line direction, wherein the first flat plate, the second flat plate and the cylindrical part are integrally formed from the belt-like plate.
A vehicle door frame which forms the window frame of a vehicle door is provided with: an outer member which forms a glass-run housing section; and a long inner member which has a body for forming the framework of the window frame and which is joined to the outer member. The outer member is provided with: an edge which forms a part of the glass-run housing section; and a return bend which has a substantially U-shaped cross-section, is provided at the edge, and has an opening open toward the inside of the vehicle. The inner member has: an extension section which extends toward the side of the body which faces the outside of the vehicle; and an edge which is provided to the extension section and which is inserted in the opening of the return bend. The edge of the extension section has a front end surface. A protrusion is formed on the front end surface so as to protrude toward the outside of the vehicle, and is disposed at a predetermined position of the inner member in the longitudinal direction thereof. The protrusion can be melted by heating by the concentration of electric current during resistance welding, and is configured to pressure-bond the front end surface and a facing section of the return bend, the facing section facing the front end surface. The protrusion has a tip which has an arc-like cross-sectional shape protruding toward the outside of the vehicle.
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