Butt welding device and butt welding method

Details Butt welding device and butt welding method Butt welding device and butt welding method

2004-05-28

2008-09-09

Kerns, Kevin P (Department: 1793)

Electric heating

Metal heating

For bonding with pressure

C219S084000, C219S101000, C219S102000, C219S104000

Reexamination Certificate

active

07423233

ABSTRACT:
A butt welding apparatus and a butt welding method where end faces of at least one plate member to be welded are butted to each other to form a butt portion, and butt welding can be performed on respective plate members which have various thickness sizes on both side portions of the butt portion with electric resistance heat by a pair of electrode members which are common to the respective plate members. At least one electrode member (1) is provided on an outer face thereof with a convex portion (1A) which gradually retreats from one plate member (31) of two plate members (31, 32) as it extends from an intermediate portion, in a thickness direction, of the one electrode member (1) along the one plate member (31). Butt welding of the two plate members (31, 32) is performed by the position of the butting portion (71) of these plate members (31, 32) being offset from the intermediate portions, in the thickness directions, of the electrode members (1, 2) to the convex portion (1A) by an amount (L1) corresponding to a difference in thickness between the plate members (31, 32).

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