AUTOMOBILE STRENGTHENING MEMBER

Title:

AUTOMOBILE STRENGTHENING MEMBER

Document Type and Number:

WIPO Patent Application WO/2002/076809

Kind Code:

A1

Abstract:

An automobile strengthening member which is light in weight and superior in axial crushing performance and has high bending strength performance is provided. Also provided is a strengthening member which will not crack even when a high strength steel sheet is used. An automobile strengthening member (1) having a notches (3) at four corners in a basic rectangular section (2), in a long form having a crisscross closed section as a whole, is characterized in that the sheet thickness at the notches (3) is 5-30% greater than that of other portions than the notches, i.e., a side wall (4) and a top wall (5). Further, an automobile strengthening member (1) characterized in that the hardness at the notches (3) is 5% greater than that of other portions than the notches, i.e., the side wall (4) and the top wall (5). Further, an automobile strengthening member wherein the strengthening member (1) is formed by drawing or hydroform process.

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Inventors:

SAKAMOTO SHINYA (JP)
SUMIMOTO DAIGO (JP)
TERADA YOSHIO (JP)
KURIYAMA YUKIHISA (JP)
SAKURAI HIROSHI (JP)
NAKANISHI EIZABUROU (JP)

Application Number:

PCT/JP2002/003015

Publication Date:

October 03, 2002

Filing Date:

March 27, 2002

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
NISSAN MOTOR (JP)
SAKAMOTO SHINYA (JP)
SUMIMOTO DAIGO (JP)
TERADA YOSHIO (JP)
KURIYAMA YUKIHISA (JP)
SAKURAI HIROSHI (JP)
NAKANISHI EIZABUROU (JP)

International Classes:

B21C1/22; B21C37/15; B21D26/033; B21D53/88; B62D21/00; B62D21/09; B62D21/15; B62D25/00; B62D25/20; F16F7/12; (IPC1-7): B62D21/15; B21C1/22; B21D26/02; B62D25/20

Foreign References:

JPH08337183A	1996-12-24
JPH11235986A	1999-08-31
JPH05293535A	1993-11-09

Other References: