Kabushiki Kaisha Toshiba

Mitsubishi Electric Corporation

Jfe Steel Corporation

Kiyoshi Nakano

Hiroshi Sekine

Kazuya Hasegawa

Kensaku Kuroki

Norihiro Murata

Akihito Mori

Yoichi Motoyashiki

Naoya Hashimoto

Yoshitsugu Iijima

Tomoyuki Kinoshita

Noritsugu Suzuki

Masatoshi Sugioka

Hiroshi Mizuno

Tetsuji Doizaki

Manabu Sonobe

In a method for manufacturing a core element which is used for a divisional layer stack core of a rotary electric machine, the method includes: a first punch cutting out process for punch cutting out a first core element having a product shape, from a belt like electromagnetic steel sheet, with a press mechanism which has a feeding device of the electromagnetic steel sheet, a feeding process for feeding the electromagnetic steel sheet, with the feeding device, and a second punch cutting out process for positioning with a product shaped pilot which has an external shape of the core element, using a punch cut out trace shape of the first core element, and producing a second core element having the product shape, by punch cutting out with the press mechanism.

Method for manufacturing a core element for an electric machine

A heat treatment apparatus includes a plurality of induction heating devices which heat a steel product, a correctional device which corrects the steel product, a computing device which computes supply predetermined electric power which is supplied to the induction heating device, on the basis of a size of the steel product, a conveying speed of the steel product, a heating target temperature of the steel product, and a predetermined temperature of the steel product at the previous stage of the induction heating devices, and a power supply unit which supplies the supply predetermined electric power computed by the computing device to the induction heating devices, and the computing device which computes electric power for uniform heating processing on the steel product or electric power for surface layer heating processing on the steel product.

Heat treatment apparatus, heat treatment method, medium on which heat treatment program is recorded, and steel product

C-shaped inductors for induction heating a heated steel material that is carried via table rollers. Each C-shaped inductor includes a C-shaped iron core having a pair of legs facing each other by sandwiching a gap through which the heated steel material passes, and heating coils wound around the pair of legs of the C-shaped iron core. A ring-shaped iron core for restricting induced currents generated in the heated steel material is disposed near the C-shaped inductors, and the heated steel material passes through the gap of each C-shaped inductor.

Induction heater with a unit for preventing generation of sparks

Growing community of inventors

Tokyo, Japan

Kiyoshi Nakano