ROLLED PLATE JOINING APPARATUS AND CONTINUOUS HOT ROLLING APPARATUS EQUIPPED WITH THE SAME

摘要

A rolled plate joining apparatus for joining rolled plates according to the present invention includes a rotatable slant shaft, movable in a horizontal directio n of the rolled plates with the shaft having an extremity, two opposite sides and an outer circumferential surface. A cutter is fixed on the extremity of the slant shaft with the cutt er having a plurality of cutter tips, the cutter tips having inner surfaces. A flange section is fixed on the shaft behind the cutter and has a contact surface in contact with the cutter . A supply ring is relatively rotatively disposed on the shaft behind the flange section and defines a sealed annular space between the supply ring and the outer circumferential surface of the shaft. A supply passage is provided passing through an inside of the shaft from the annular space to communicate with the contact surface of the flange section. The cutter is provided with cooling passages in communication with the supply passage and extending to t he inner surfaces of the cutter tips. An outside coolant supply line is connected to the annular space to cool the cutter tips from the inner surfaces. A cover having opening sections at positions corresponding to a position of the cutter is provided on one or two opposite sides of the shaft with a coolant supply pipe for supplying a coolant, supported outside of the cover. A plurality of cooling nozzles are directed to the opening sections and connec t to the coolant supply pipe. Coolant is jetted from the cooling nozzles to the cutter to coo l the cutter.