Denso Corporation

Nippondenso Co., Ltd.

Tamotsu Inoue

Takao Ikeda

Yoshitaka Kuroda

Yuji Ogawa

Yasuo Abe

Kazutoshi Yamamoto

A cutting device cuts a flat tube in such a manner that a locus connecting each point where a blade tip of a blade portion of the cutting device is firstly introduced into the flat tube passes through a base portion of a frontmost side protrusion portion. Therefore, the bending moment generated due to a cutting force of the cutting device is decreased to prevent defective cutting.

Method for cutting tube

A method for manufacturing long products from a lengthy plate-like material having an appreciably small thickness by press working is disclosed in which the plate-like material is fed in succession into the press working stages of a single press unit carrying out a centering process, a bending process, a coining process, a sizing process, perforating process, and a final shearing process. The material having passed these press working processes is formed into long products having various required lengths and various required number of perforations formed therein. The spacing of the perforations are kept constant irrespective of changes in the thickness and width of the material.

Method for manufacturing long products by press working

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Nagoya, Japan

Tamotsu Inoue