METHOD FOR MANUACTURING TORSION BEAM

Title:

METHOD FOR MANUACTURING TORSION BEAM

Document Type and Number:

WIPO Patent Application WO/2020/111697

Kind Code:

A1

Abstract:

The present invention provides a method for manufacturing a torsion beam, the method comprising: a blank preparation step for preparing a blank obtained by processing a plate material; an indented groove unit formation step for forming an indented groove unit of the torsion beam by pressing the blank towards a lower mold; a roll-up step for rolling up the blank such that opposite end portions of the blank in the width direction face each other; a planarization step, in which a protruding portion of an upper mold presses the opposite end portions in the width direction of the blank to be plastically deformed to be flat while the opposite end portions in the width direction of the blank are supported by a side cam to face each other; a welding and bonding step for bonding the planarized opposite end portions in the width direction of the blank via welding; and a quenching step for heating the welded and bonded blank within a range of 900 to 970℃ for a retaining time within a range of 1 to 20 minutes and for cooling down the blank in a treatment liquid including at least one of water and oil in a range of 20 to 90℃.

Inventors:

LEE HONG-WOO (KR)
SEOK DONG-YOON (KR)
SHIN MYONG-HO (KR)
SA NAM-SIK (KR)

Application Number:

PCT/KR2019/016284

Publication Date:

June 04, 2020

Filing Date:

November 25, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

POSCO (KR)
AUSTEM CO LTD (KR)

International Classes:

B23P15/00; B21D5/10; B21D22/02; B23K31/02; B23P17/00; B60G11/18; C21D1/78; C21D9/50

Foreign References:

KR100935018B1	2010-01-06
US6601427B2	2003-08-05
KR20110118607A	2011-10-31
US20160008863A1	2016-01-14
US20030044632A1	2003-03-06

Other References: