Coiling furnace

Abstract

The invention relates to a coiling furnace ( 1 ), especially a coiling furnace ( 1 ) for Steckel rolling mills, wherein a hot-rolled strip ( 2 ) is coiled and uncoiled and optionally heated on a furnace drum ( 3 ) in the furnace interior ( 4 ) in a reversing manner. Said coiling furnace comprises guide tables ( 6 ) mounted on the mobile furnace door ( 5 ) of the coiling furnace ( 1 ) for inserting and/or guiding the heat-rolled strip ( 2 ), the furnace door ( 5 ) and the coiling furnace ( 1 ) being separate units. The furnace door ( 5 ) is arranged on a part of a roller rack ( 6 ) below the coiling furnace ( 1 ) and the furnace door ( 5 ) is subdivided into at least two elements ( 8, 9 ) that swing in relation to one another, both door elements ( 8, 9 ) being interconnected via a door bearing ( 10 ) and being configured to be pivoted. The invention is characterized in that the coiling furnace ( 1 ), in its interior ( 4 ), is configured with only one furnace roller ( 11 ) to allow complete insertion of the strip into the coiling furnace without the risk of the strip coming undone. For withdrawal of the strip a cover plate is placed on the door element and there is no need for a stripper.

1 . A coiler furnace, in particular a coiler furnace for a Steckel rolling mill, in which a hot-rolled strip is wound and unwound on a furnace drum in a furnace chamber with back and forth transport, comprising guide plates for threading and guiding the rolled strip and mounted on a moveable door of the coiler furnace, the furnace door and the coiler furnace being separate units with the furnace door arranged on a part of a roller rack located below the coiler furnace and the furnace door being divided into at least two parts with both parts interconnected by a door hinge and pivotal wherein the coiler furnace is provided in the furnace chamber with only a single furnace roller. 
   
   
       2 . The coiler furnace according to  claim 1  wherein the furnace roller comprises a roller jacket and a roller axle. 
   
   
       3 . The coiler furnace according to  claim 2  wherein the roller jacket is made from a heat-resistant material. 
   
   
       4 . The coiler furnace according to  claim 2  wherein the roller axle is provided with interior cooling. 
   
   
       5 . The coiler furnace according to  1  wherein the furnace roller bears above a rotation axis of the furnace drum against the strip. 
   
   
       6 . The coiler furnace according to  claim 1  wherein the furnace roller is driven. 
   
   
       7 . The coiler furnace according to  claim 6  wherein a drive of the furnace roller is as an electric or fluid motor. 
   
   
       8 . The coiler furnace according to  claim 1  wherein the part has on its outer end a pivot on which a cover plate with an adjustment element provided. 
   
   
       9 . In combination with a Steckel mill, a coiler furnace comprising:
 a housing formed with an opening but otherwise being generally closed;   a mandrel rotatable about a mandrel axis in the housing;   drive means for rotating the mandrel and winding a workpiece strip up on the mandrel into a coil;   a roller rack below the housing;   a two-part door assembly shiftable between an open position extending downward and guiding the workpiece strip on the rack upward into or downward out of the housing to or from the mandrel and a closed position fitted over and closing the opening and through an unloading position closely juxtaposed with the mandrel and deflecting a trailing end of the mandrel downward out of the opening;   a single roller inside the housing shiftable radially to press turns of the strip against the mandrel; and   actuator means outside the housing for pressing the roller against the strip and preventing same from unwinding.   
   
   
       10 . The combination defined in  claim 9  further comprising
 control means for winding the strip up on the mandrel and stopping winding of the strip in a position with the trailing end of the strip between the roller and the opening an out of contact with the roller.   
   
   
       11 . The combination defined in  claim 9  wherein the two parts of the door assembly are pivoted on each other. 
   
   
       12 . The combination defined in  claim 9  wherein the roller lies above the roll axis. 
   
   
       13 . The combination defined in  claim 9  wherein the roller has ends projecting through respective slots in the housing, the combination further comprising:
 levers outside the connected between the actuator means and the ends of the roller; and   shields on the levers closing the slots as the ends of the rollers move in the slots.