Kawasaki Steel Corporation

Takashi Ehiro

Teruaki Tanaka

Takashi Kusaba

Teruyuki Nakanishi

Tadaaki Yanazawa

Eisuke Yamanaka

Toshiyuki Akune

Shinzo Saito

Hiroshi Okumura

Masashi Yamashita

A method of producing a steel H-sheet pile from a beam blank of an H-shape cross section, symmetrical in the vertical and lateral directions, and prepared through blooming rolling or continuous casting including a first step wherein a breakdown mill having a preparatory step forming caliber and a forming caliber is used to form the beam blank in such a manner that in the preparatory step forming caliber the beam blank is changed into an asymmetrical shape in the vertical direction and subsequently, in the forming caliber, the beam blank is rolled to have a socket and projections; a second step wherein a group of roughing universal mills is used to roll the beam blank in such a manner that in a roughing universal mill mainly the web and flanges are reduced in thickness while in a sizing universal mill the outer surfaces of the flanges are pressed by vertical slots thereof while the end portions of the flanges are sized-rolled by horizontal rolls thereof; a third step wherein a joint portion at the end portion of the flange is subjected to bending between a first roller having a projection for defining a bending position of said joint portion and a second roller having a projection for bending the joint portion and a fourth step wherein a finishing universal mill is used to finish-roll the beam blank to provide the steel H-sheet pile.

Method of producing steel H-sheet pile

A method of rolling raw materials inclusive of slabs for the manufacture of beam blanks, and a roll to be used therefor, are disclosed. This method includes the steps of (a) subjecting a raw material, whose section consists of a web portion and a flange portion(s) having a width wider than the thickness of the web portion, to such a partial rolling that the web portion is partially rolled at regions inclusive of at least the joints of the flange portion(s), except the remaining central region, among a plurality of regions divided in the widthwise direction of the web portion, and (b) subjecting only the remaining central regions to a rolling. In the practice of this method, there is used a roll consisting of a single cylindrical drum including a first segment and a second segment arranged side by side to each other; the first segment having at least one relief of circumferential grooves facing the web portion; a plurality of rolling collars separated apart from each other through the relief in the axial direction, and serving for the partial rolling of the web portion, and a circumferential groove(s) dividing a side of the rolling collar for the web portion near the joint and enclosing the flange portion; and the second segment having a pair of reliefs each composed of a wider circumferential groove facing the flange portion, and a rolling drum extending between the reliefs and serving for the rolling of only the remaining central region of the web portion.

Method of rolling slabs for the manufacture of beam blanks and a roll to

A method of forming a beam blank, wherein:

Method of forming beam blank

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Kurashiki, Japan

Takashi Ehiro