Profile and method of forming same

Abstract

A cold-rolling method of forming a profile formed of a strip-shaped rolling stock and having thickness-reduced section ( 16 ) and at least one thickened region ( 21, 22 ) provided in a region of at least one bend ( 17, 18 ) of the profile, includes deforming a strip-shaped rolled metal stock in at least one region for forming the thickness-reduced section, with simultaneous accumulation of the initial material in a region adjacent to the thickness-reduced section so that a thickened region is formed adjacent to the thickness-reduced section, and bending the deformed rolled metal stock section into the profile.

1 . A cold-rolling method of forming a profile of a strip-shaped cold rolled metal stock having an initial material thickness (W), the profile having at least one thickness-reduced section ( 16 ) having a thickness (D) that is smaller than the initial material thickness (W) of the rolling stock; at least one bend ( 17 ;  18 ); and at least one thickened region ( 21 ,  22 ) provided in region of the at least one bend ( 17 ,  18 ) adjacent to the thickness-reduced section ( 16 ) and having a material thickness (H) greater than the initial material thickness (W) of the rolling stock the profile ( 11 ) is formed of, the method comprising the steps of:
 in a single step, deforming a strip-shaped rolled metal stock in at least one region thereof for forming the thickness-reduced section therein and for simultaneous accumulation of the initial material in a region adjacent to the thickness-reduced section, whereby a thickened region is provided adjacent to the thickness-reduced section; and bending the strip-shaped rolled stock provided with the thickness-reduced section and the thickened region adjacent thereto into the profile.   
     
     
         2 . A method according to  claim 1 , wherein the profile has two side walls ( 12 ) spaced from each other and extending parallel to each other, and a connection section ( 13 ) that connects the two side walls with each other, wherein the at least one thickness-reduced section is provided in one of the two side walls, and that at least one bend ( 17 ) is provided between the one of the two side walls and the connection section, wherein the profile includes another thickness-reduced section provided in another of the two side walls, and another bend ( 17 ) provided between the another of the two walls and the connection section, and wherein the single deforming step comprises simultaneously forming in the strip-shaped rolled stock, spaced from each other by a predetermined distance, the at least one and another thickness-reduced sections ( 16 ), and two thickened regions adjacent to respective inner sides of the at least one and another thickness-reduced sections 
     
     
         3 . A method according to  claim 2 , wherein the side walls each has, at an end thereof remote from the connection section, an inwardly bendable free end defining a further bend ( 8 ), and wherein the single deforming step further includes simultaneously providing thickness regions adjacent to respective outer sides of the respective thickness-reduced section and defining thickened regions ( 22 ) at outer sides of the thickness-reduced sections. 
     
     
         4 . A method according to  claim 1 , wherein the material thickness of the at least one thickness (H) of the at least one thickened region corresponds to 1.1-2 times of the initial material thickness (W) of the rolling stock the profile ( 11 ) is formed of. 
     
     
         5 . A method according to  claim 1 , wherein the at least one thickened region ( 21 ,  22 ) has a material width (B) in a direction transverse to a longitudinal axis ( 15 ) of the profile ( 11 ) and corresponding to 1.0-5.0 times of the initial material width (W) of the rolling stock the profile ( 11 ) is formed of.