Hitachi, Ltd.

Kasado Kikai Co., Ltd.

Takeyuki Watanabe

Sumio Okuno

Hiroyuki Yamada

Morishige Hattori

Masato Okazaki

Hitoshi Tsuruda

Ryoichi Takayama

Kiyotaka Kikumoto

Toshiaki Ueda

Takashi Yasuhara

Katsuyuki Terada

Michifumi Takeichi

Hisashi Tani

Masayuki Dogen

Conductor barsand end ringsof a rotorof a rotary electric machine are made of an aluminum material. The end ringsare electrically and mechanically joined to the opposite ends of the conductor barswith friction stir welding.

Dynamo-electric machine

A vehicle body, such as, for example, a railway passenger vehicle body, which includes an external body sheeting formed of opposite sides and a roof and having an internal floor extending between the sides. The sides, above the level of the internal floor, and the roof each include a number of extruded metal plates forming the external body sheeting and integral ribs, extending in a longitudinal direction of the vehicle body, are provided on inner faces of the extruded metal plates. The extruded metal plates are welded together at weld lines extending in a longitudinal direction of the vehicle body.

Vehicle body construction having longitudinally elongated extruded

A method of manufacturing a portion of a vehicle body, with the portion being at least part of one of a side, an end, a roof, and a floor plate of the body. The method comprises the steps of providing extruded metal plates formed of a light alloy metal with each of the plates having welding edges and integral structural ribs extending parallel to the welding edges on the inner face of the plates, arranging the plates on a jig in position for welding of the welding edges, without an overlap of the welding edges, restraining the plates in a welding position on the jig, and welding the welding edges on the jig by one-sided welding from an inner side of the plates to produce continuous welds. Frame members extending transversely to the structural ribs can be welded on the same side without moving the plate from the jig.

Method of manufacturing a vehicle body

A rolling-stock underframe construction comprising longitudinal side sills, end sills connecting opposite longitudinal ends of one side sills to opposite longitudinal ends of the other side sill, body bolsters respectively disposed at positions corresponding to trucks, and center sills extending between the end sills and the corresponding body bolsters in parallel to the side sills; and a floor member fixedly disposed in an area defined by the side sills and the end sills. The floor member comprises an upper plate forming, a lower plate forming, and a corrugated plate disposed between the upper plate and lower plate. The corrugated plate includes an alternate arrangement of ridges and longitudinal furrows and is joined to both the upper and lower plate. The floor member has weight and thickness smaller than those to join the floor member side sills, and body bolsters, an assembly of the corrugated and the upper plate or lower plate is joined to the side sills and the body bolsters, and then the lower or upper plate is joined to the corrugated plate, the side sills and the body bolsters, so that the floor member is joined firmly to the side sills and the body bolsters.

Construction and a manufacturing method of underframe for a rolling stock

Growing community of inventors

Kudamatsu, Japan

Takeyuki Watanabe