METHOD FOR MANUFACTURING L-SHAPED SQUARE PIPE, DEVICE FOR MANUFACTURING L-SHAPED SQUARE PIPE, AND L-SHAPED SQUARE PIPE

Title:

METHOD FOR MANUFACTURING L-SHAPED SQUARE PIPE, DEVICE FOR MANUFACTURING L-SHAPED SQUARE PIPE, AND L-SHAPED SQUARE PIPE

Document Type and Number:

WIPO Patent Application WO/2017/010427

Kind Code:

A1

Abstract:

Provided is a method for manufacturing an L-shaped square pipe that ensures adequate strength even without welding, a device for manufacturing the L-shaped square pipe, and the L-shaped square pipe. Provided is a method for manufacturing an L-shaped square pipe 1A, comprising: a groove section forming step for forming a groove section 5 by pressing one surface 1a of a square steel pipe 1, along the transverse direction of the one surface 1a, towards another surface 1b positioned on the reverse side of the one surface 1a; and a bending step for bending the square pipe so that the sides of the first surface 1a sandwiching the groove section 5 approach each other.

Inventors:

TANOUE RYUJI (JP)

Application Number:

PCT/JP2016/070294

Publication Date:

January 19, 2017

Filing Date:

July 08, 2016

Export Citation:

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Assignee:

NISSHIN STEEL CO LTD (JP)

International Classes:

B21D7/00; B21D11/08

Foreign References:

GB1481712A	1977-08-03
JP2001047140A	2001-02-20
JPH01241329A	1989-09-26
JPS3929095B1

Other References: