Hisada Co., Ltd.

Aisin Seiki Kabushiki Kaisha

Aisin Corporation

Masashi Saeki

Masahiro Hashiguchi

Koji Yoshida

Takashi Harada

Eisuke Sato

Koji Yamamoto

Yohei Amemiya

Yasuchika Sasaki

Takashi Nunome

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.

Method for manufacturing swaged structure and swaged structure

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.

Roll forming method and roll forming apparatus

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.

Vehicle door frame and inner member for vehicle door frame

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Toyota, Japan

Masashi Saeki