TORSION BEAM MANUFACTURING METHOD, TORSION BEAM MANUFACTURING DEVICE, AND TORSION BEAM

Title:

TORSION BEAM MANUFACTURING METHOD, TORSION BEAM MANUFACTURING DEVICE, AND TORSION BEAM

Document Type and Number:

WIPO Patent Application WO/2017/195706

Kind Code:

A1

Abstract:

This torsion beam manufacturing method is a method for manufacturing a torsion beam provided with a constant-shape closed cross-section part in which a cross section orthogonal to a longitudinal direction is a substantially V-shaped or substantially U-shaped closed cross section having a pair of protuberances, and a shape-changing part which is continuous with the constant-shape closed cross-section part and of which the shape of the closed cross section changes progressively away from the constant-shape closed cross-section part, wherein the torsion beam manufacturing method has a thinning step of pressing each of the pair of protuberances outward and forming a pair of thinned parts so as to exert resistance against the bulging of the pair of protuberances while supporting both outside surfaces of each of the pair of protuberances in at least the shape-changing part.

Inventors:

IGUCHI KEINOSUKE (JP)
MIZUMURA MASAAKI (JP)

Application Number:

PCT/JP2017/017257

Publication Date:

November 16, 2017

Filing Date:

May 02, 2017

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B60G9/04; B21J5/02; B21J5/08; B21K1/12

Foreign References:

JP2013091433A	2013-05-16
JP2008063656A	2008-03-21
JP2014025773A	2014-02-06
JP2009274077A	2009-11-26
JP2012505784A	2012-03-08

Other References: