Primetals Technologies Japan, Ltd.

Hirotoshi Tagata

Yujiro Watanabe

Mitsuru Onose

Shinichi Kaga

Satoru Zenitani

Yasutsugu Yoshimura

Noriaki Tominaga

Takehiko Saito

Ryusuke Kimoto

Ryosuke Mitsuoka

Takafumi Nakaya

Tatsuki Mitsuzumi

Ikuo Wakamoto

A welding apparatus including: a welding unit () that includes a pair of electrode wheels (A,B) arranged to face each other with a welding object therebetween; a pressing unit () that includes a pair of press rolls (A,B) that are arranged to face each other with the welding object therebetween and press a welded portion of the welding object welded by the electrode wheels (A,B); a cooling unit () that supplies a cooling medium toward the welded portion pressed by the press rolls; a heating unit () that heats the welded portion cooled by the cooling unit (); and a moving body () that supports the welding unit (), the pressing unit (), the cooling unit (), and the heating unit (), and reciprocates in a welding direction of the welding object.

Welding apparatus and welding method

A pair of upper and lower pressure rollersis disposed so that their axesare tilted in a horizontal plane in respective directions opposite to each other with respect to a straight line perpendicular to a welding line of a joint portion J. The pressure rollersare positively driven by corresponding electric motorsto thereby roll the joint portion. Thus, steps defined at the joint portion can be smoothed and a step gradient can be reduced to ensure a high degree of joint strength. Thus, it is possible to prevent a step portion from being interfolded into the base material of the meal plates

Metal plate joining method and apparatus

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Hiroshima, Japan

Hirotoshi Tagata