Method and apparatus for removing burrs from joined billets in a continuous rolling process

A method for removing a burr in a continuous rolling process, comprising the steps of:

• detecting a welded part on billets for continuous rolling, which billets were welded at the welded part so as to be joined together by a travelling welder, using a sensor mounted to a travelling grinding machine located at a downstream side of the welder;
• presetting a plurality of grinders mounted to the travelling grinding machine and continuously revolving the grinders relative to the billet immediately after detecting the welded part while moving the travelling grinding machine toward a downstream side of the billet, and accelerating the travelling grinding machine to a moving speed of the billet which is being continuously rolled;
• detecting that the welded part of the billet has arrived at a position of the grinders;
• and
• removing a burr on the welded part by fixing the grinders at the preset position while travelling the travelling grinding machine with the speed of the billet rolling synchronously, after detecting the arrival of the welded part of the billet at the position of the grinders.

A method for removing a burr in a continuous rolling process, comprising the steps of:

• scattering ground chips generated by grinding a burr on a welded part of a billet toward a downstream side of a billet travelling line within a limited direction during moving of a travelling grinding machine;
• placing a hood on a downstream side of the travelling grinding machine while facing the hood against the scattering direction of the ground chips, and forming a water film on an inner surface of the hood by flowing water down along the inner surface of the hood;
• and
• collecting the ground chips with the hood, whereby said ground chips continuously flow down along with the water film on the inner surface of the hood.

A grinding machine for continuously rolling a round billet, comprising:

• a travelling body shuttling along a moving direction of the round billet;
• a turret ring supported by the travelling body so as to be rotatable on the travelling body about a center axis of the turret ring;
• and
• a plurality of grinding devices arranged movably along a radius of the turret ring;
• wherein the grinding devices comprise respective grinders which are set at a tilted angle relative to a center axis of the turret ring.

A grinding machine for continuously rolling a rectangular billet, comprising:

• 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.