Mitsubishi Electric Corporation

Osaka University

Mitsubishi Electric Corpotation

Keisuke Murase

Takuya Ikeda

Muneaki Mukuda

Seiiyu Ishimoto

Masaya Inoue

Masashi Nakamura

Akihiro Yamamura

Shogo Okamoto

Hidetoshi Fujii

Naoki Ohashi

Takushi Takizawa

Shoichiro Nishitani

Shigenobu Tochiyama

Tomohiro Bessho

Naohiko Harada

Tetsuya Amasaki

Toshiki Kuwahara

A pressure receiving surface inclined to a rotation axis is provided on the side surface of a stir probe of a rotating tool. The pressure receiving surface includes a pressure receiving region which is always perpendicular to a rotation tangential direction in a cross section perpendicular to the rotation axis. In friction stir processing, the stir probe is caused to rotate in a rotation direction B in which the normal direction of the pressure receiving surface is positive. According to this kind of rotating tool, as it has no shoulder, a joint width does not increase even when a stirring region is deep, and also, a plastic flow in a rotation direction is generated by a pressure receiving surface, so that it is possible to reduce the proportion of the plastic flow in the rotation axis direction, and thus possible to suppress an occurrence of burr.

Rotating tool for and method of friction stir welding

A friction stir welding method in which a first member to be welded and a second member to be welded and having a first step portion are welded by friction stir welding using a welding tool includes the steps of arranging the first member to be welded on a step supporting surface of the first step portion with a gap between the first member to be welded and a side surface of the first step portion, pushing the welding tool into the first member to be welded from a surface of the first member to be welded while rotating the welding tool and inserting the welding tool until reaching the step supporting surface of the second member to be welded and stirring the first member to be welded and the second member to be welded by rotating the welding tool to form a welding part.

Friction stir welding method and manufacturing method of welding structure

This invention is concerning a rotary electric machine, this electric motorbeing provided with an inner cylinder, a rotorprovided so as to be rotatable inside the inner cylinder, a statorfixed to the inner cylinderand separated via a gap from an outer periphery of the rotor, and an outer cylinderthat covers an entire periphery of the inner cylinderand forms a space, which serves as a coolant passage, in conjunction with the inner cylinder, wherein both ends of the inner cylinderand the outer cylinderin an axial direction are fixed to each other by cylinder welding portionsformed by welding. Accordingly, a rotary electric machine that is small and light can be obtained at low cost.

Rotary electric machine

A fixing member () formed of an annular metal material is molded integrally with a connecting plate () to constitute a connecting plate structure (), said connecting plate () consisting of a plurality of bus bars () and a holder () for fixing and holding the bus bars. The fixing member () has an annular portion () touching a frame () for holding a stator (), and the connecting plate structure () is fixed to the frame () by the whole or a part of the surface of the annular portion.

Rotating electric machine

Growing community of inventors

Tokyo, Japan

Keisuke Murase