Method of producing metal beams with a top-hat profile

Abstract

A method for producing metal beams having a top-hat profile comprises the hot rolling of slabs ( 13 ), ingots ( 12 ), billets, preliminary profiles ( 14 ) or similar semifinished products in a rolling train. The rolling train comprises at least two roll stands. Using at least two shaping passes during a single rolling process in a number of rolling stations at hot-rolling temperature, preferably simple irregular pass design turns an entering cross section ( 10 ) of a one-part semifinished product into an exiting cross section having a top-hat profile (A), which corresponds geometrically more or less to the profile of the finished product.

1 .- 13 . (canceled) 
     
     
         14 . A method for producing metal beams having a top-hat profile (A), comprising:
 hot rolling semifinished products in a rolling train with at least two roll stands,   wherein an exiting cross section having a top-hat profile is formed from an entering cross section of a one-part semifinished product using at least two shaping passes during a single rolling process in a plurality of rolling stations at hot-rolling temperature, and   wherein the exiting cross section substantially corresponds geometrically to a profile of a finished product.   
     
     
         15 . The method as in  claim 14 ,
 wherein the semifinished products are slabs ( 13 ), ingots ( 12 ), billets, or preliminary profiles ( 14 ).   
     
     
         16 . The method as in  claim 14 ,
 wherein the at least two shaping passes have a simple irregular pass design.   
     
     
         17 . The method according to  claim 14 ,
 wherein the entering cross section of the one-part semifinished product has a rectangular cross section whose material distribution corresponds approximately to a material distribution to be produced with a first pass of the hot rolling.   
     
     
         18 . The method according to  claim 14 ,
 wherein the entering cross section of the one-part semifinished product is formed into the exiting cross section using seven to thirteen shaping passes.   
     
     
         19 . The method according to  claim 18 ,
 wherein the hot rolling is at least partly carried out with duo roll stands.   
     
     
         20 . The method according to  claim 14 ,
 wherein the hot rolling is carried out with an open arrangement of three to eight roll stands arranged side by side.   
     
     
         21 . The method according to  claim 20 ,
 wherein the hot rolling is carried out using four to eight roll stands arranged one behind the other.   
     
     
         22 . The method according to  claim 21 ,
 wherein the hot rolling is carried out using roughing roll stands and finishing roll stands in tandem arrangement, in a manner that is at least partially reversing.   
     
     
         23 . The method according to  claim 14 ,
 wherein the hot rolling is carried out using four to ten roll stands arranged one behind the other, comprising roughing roll stands, finishing roll stands in tandem arrangement operated in reversing mode, and finishing roll stands operated in continuous mode.   
     
     
         24 . The method according to  claim 14 ,
 wherein the hot rolling is carried out using seven to eighteen roll stands using roughing roll stands and/or roll stands in tandem arrangement, which are operated in reversing mode, and finishing roll stands, which are operated continuously.   
     
     
         25 . The method according to  claim 14 ,
 wherein the hot rolling is carried out completely continuously using seven to twenty roll stands arranged one behind the other.   
     
     
         26 . The method according to  claim 14 ,
 wherein the hot rolling is carried out using duo roll stands and/or universal roll stands.   
     
     
         27 . The method according to  claim 14 ,
 wherein, after a last forming pass ( 10 ) of the hot rolling, an inclination of flanges of the top-hat profile (A) is between 0.1 and 15 degrees relative to a perpendicular to an axis of symmetry of the top-hat profile.   
     
     
         28 . The method according to  claim 14 ,
 wherein the hot rolling is followed by a bending process with a straightening machine or a bending device.