Metal working – Method of mechanical manufacture – Structural member making
Reexamination Certificate
2007-11-06
2007-11-06
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Structural member making
C029S515000, C029S417000, C072S068000, C072S367100
Reexamination Certificate
active
10520968
ABSTRACT:
In this manufacturing method for a frame body, after ring rolling a metal material to form a ring-shaped member, a rectangular member is formed by pressing and deforming this ring-shaped member in the radial direction. At this time, an angle of corner portions that impart the rectangular shape to the rectangular member is formed smaller than an angle of the frame body that is to be obtained by die forging the rectangular member. According to the frame body obtained by this manufacturing method for a frame body, it is possible to increase the mechanical strength, and in particular, the creep strength. Furthermore, when forming the frame body, the occurrence of defects during manufacture may be restrained, it becomes possible to realize a reduction of the amount of waste metal material and the manufacturing time, and thereby this frame body may be formed inexpensively.
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English Abstract for Chinese Publication No. 1285249 published on Feb. 28, 2001.
Kikuchi Hiroaki
Takahashi Shoichi
Tamaru Kiyoshi
Bryant David P.
Darby & Darby
Koehler Christopher M.
Mitsubishi Materials Corporation
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