Primetals Technologies Japan, Ltd.

Ryusuke Kimoto

Masashi Yoshikawa

Yujiro Watanabe

Takanori Nagai

Hirotoshi Tagata

Ryosuke Mitsuoka

Tatsuki Mitsuzumi

Takafumi Nakaya

A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is &#x394;Xn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is &#x394;Xn. The staggered array of the first nozzles and the staggered array of the second nozzles are disposed offset from each other such that, a center of the second nozzle is at a position offset by a shift amount S from a center of the first nozzle in the width direction, and the center of the second nozzle is positioned in a region defined by an oval having a semi-axis of &#x394;Xn/4 in the width direction and a semi-axis of Yn/3 in the longitudinal direction. The shift amount S is expressed by S=m&#xd7;&#x394;Xn/2, where m is an odd number such that S is closest to Xn/2.

Cooling apparatus for metal strip and continuous heat treatment facility for metal strip

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

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Tokyo, Japan

Ryusuke Kimoto