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Title:
AUTOMOBILE BUMPER STRUCTURE AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP2013252744
Kind Code:
A
Abstract:

To achieve strength improvement and downsizing of an automobile bumper structure.

A front stay member 2 is inserted into a through-hole 61a and a through-hole 62a until a flange 21 comes into surface contact with a bumper reinforcement 6 and one end of a middle stay member 4 is inserted and fitted to the outside of a tubular portion 22 of the bumper stay member 2 that protrudes from the through-hole 62a until a section of one end of the middle stay member 4 comes into contact with the bumper reinforcement 6. A rear stay member 3 is inserted and fitted to the inside of another end of the middle stay member 4 until a section of another end of the middle stay member 4 comes into contact with a step of a tubular portion 32 of the rear stay member 3. A magnetic field shaper 72 is disposed so as to face portions of an outer circumferential surface of the middle stay member 4 that respectively overlap the front stay member 2 and the rear stay member 3, and the middle stay member is caulked to the front stay member 2 and the rear stay member 3 by supplying an instantaneous heavy-current to cause electromagnetic contraction of the middle stay member 4.


Inventors:
IMAMURA YOSHIHAYA
HORIGUCHI KAZUSHIGE
Application Number:
JP2012128274A
Publication Date:
December 19, 2013
Filing Date:
June 05, 2012
Export Citation:
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Assignee:
KOBE STEEL LTD
International Classes:
B60R19/24; B21D26/14; B21D39/04; B21D53/88
Domestic Patent References:
JP2008068849A2008-03-27
JP2002019553A2002-01-23
JPH0810864A1996-01-16
JP2008068849A2008-03-27
JP2002019553A2002-01-23
JPH0810864A1996-01-16
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Rumi Ichikawa