Electric heating – Metal heating – By arc
Reexamination Certificate
2011-08-23
2011-08-23
Heinrich, Samuel M (Department: 3742)
Electric heating
Metal heating
By arc
C219S121640, C228S212000, C228S005700, C269S037000, C269S152000
Reexamination Certificate
active
08003914
ABSTRACT:
A butt welding system and a butt welding method of steel plate by which the quality of a product can be ensured. Butting portions of blank members (1,2) to be joined together are butted and a predetermined butting load is applied to the butting portion, wherein the blank members (1,2) are moved relatively in the direction of the welding line thus matching the butting portions. Protrusions and recesses formed on each butting portion of each blank member (1,2) are flattened, whereby linear precision at each butting portion of each blank member (1,2) is enhanced as compared with a case where the butting portions are not matched. Since the gap is reduced extremely at the butting portion, welding is facilitated at the butting portion. Good welding beads are thereby obtained at the butting portion and the quality of a product is ensured.
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Hida Masako
Kashiwabara Keiichi
Nishio Masahiro
Sakemi Shuuji
Shimizu Takayuki
Finnegan Henderson Farabow Garrett & Dunner LLP
Heinrich Samuel M
Toyota Jidosha & Kabushiki Kaisha
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