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AssigneeNippon Steel Corporation
InventorsKenji TAMURA, Kenji IMANISHI, Sam Soo HWANG, Kunihiro YABUNO, Kunihiro YOSHIDA, Koichiro ISHIHARA
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The production method includes a first step, a second step and a third step. In the first step, a steel material is forged by dies, whereby a forged product including a rough web part and four plate-shaped rough flange parts is produced. In the second step, at least one specified rough flange part, which is at least one of the four rough flange parts, is pressed by a first die, whereby a first bent portion bending outward in an up-down direction is formed in the specified rough flange part. In the third step, the edge of the first bent portion is pressed by a second die inward in the up-down direction, whereby the edge is deformed and a second bent portion is formed. In the third step, the edge of the specified flange part is deformed while the edge is kept from deforming in a front-rear direction.
A method for producing a front axle beam including a beam part, the beam part including a web part and flange parts joined on both sides of the web part and having an H-shaped cross section, comprising:
(canceled)
A front axle beam comprising a beam part, and two king-pin attachment parts provided to both ends of the beam part with respect to a length direction of the beam part, wherein:
Dependencies are inferred from the claim text.