CONTINUOUS JOINT TYPE SHAPE AND ROLLING METHOD THEREOF

Japanese Patent JP3658433

B

PROBLEM TO BE SOLVED: To obtain a continuos joint type shape having fixed width of opening and excellent fitting strength by separately manufacturing the web thickness and thickness of pawl parts into desirable arbitrary size in accordance with the purpose of its use without causing the defects in shape of joint part, bend at the time of rolling, decrease of consumption unit of roll or the like at the time of manufacturing the continuos joint type shape by rolling and its manufacturing method.
SOLUTION: After only the tip parts of flanges are buckled and bent to the outside of the flanges with an edger mill in the intermediate rolling stage of the rolling process of the continuous joint type shape, by executing bending work of the flanges with a flange bending/forming mill and a finishing mill, the pawl parts 1b having the same shape which are bending formed into an approximate circular arc shape on both sides in the width direction of the web 1a having prescribed thickness and width are integrally provided. Bended part 1s are formed in the tip parts of the pawls and the continuous joint type shape the widths (k) of opening in the tip parts of the pawls of which are formed constant in the right and left is shaped. By engaging the bended part 1s with the male joint part 1d of a connecting member 6 at the time of connecting this continuous joint type shape to the connecting member 6, fitting strength is improved.

Ikuta, Kazue
Nishino, Taneharu

JP1995000249250

March 18, 2005

September 27, 1995

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NIPPON STEEL CORP

B21B27/02; B21B1/08; B21H8/00; B21H8/02; B21B27/02; B21B1/08; B21H8/00; (IPC1-7): B21B1/08; B21B27/02; B21H8/00; B21H8/02

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