Method of manufacturing vehicle body side structure and vehicle body side structure
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United States of America Patent
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May 26, 2015
Grant Date -
Aug 28, 2014
app pub date -
Feb 21, 2014
filing date -
Feb 26, 2013
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Abstract
First to third steel members are cut to form predetermined planar shapes using press machines and form an upper member, a reinforcement member and a lower member. The carbon content of the third steel member is set lower than the carbon content of the first and second steel members. The upper member, the reinforcement member and the lower member are then assembled. The reinforcement member is superposed on the upper member. The upper member and the lower member are partially superposed. The superposed portions of the upper member and the reinforcement member and the superposed portions of the upper member and the lower member are then respectively joined by spot welding to form a blank member. The spot welded blank member is then heated to a temperature of a transformation point or higher, and the blank member is hot press formed by one press machine.
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