Nkk Corporation

Bunnosuke Ushioda

Yuji Watanabe

Akira Sakai

Giichi Matsuo

Susumu Okawa

Koji Okushima

Soichi Aoyama

Yuki Sugawara

Hidenori Anai

Nobuyoshi Hamura

A method for removing burrs in a continuous rolling process including the steps of joining the rear end of a preceding billet with the front end of a succeeding billet using a flash butt welding method while both billets are moving, and grinding a burr on the welded part of the joined portion using a plurality of grinders while the billets are moving and while rotating the grinders and moving the grinders synchronously with the travelling speed of the billets. A grinding machine for continuously rolling a round billet includes a travelling body shuttling along the direction of movement of the round billet, a turret ring rotatably supported by the travelling body, and a plurality of grinding devices arranged in a movable manner within a radius of the turret ring, wherein the grinding devices include grinders which are set at a tilted angle relative to the center axis of the rotatable turret ring. A grinding machine for continuously rolling a rectangular billet includes a travelling body moving along a moving direction of the rectangular billet, two pairs of grinding devices located at a front side and a rear side, respectively, of the travelling body and having grinders which rotate on a plane facing the rectangular billet and along a longitudinal direction of the rectangular billet, a moving device for moving the grinding devices in a right angle direction relative to the rectangular billet, and a device for moving the grinders to come close to and apart from the rectangular billet.

Method and apparatus for removing burrs from joined billets in a

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Tokyo, Japan

Bunnosuke Ushioda