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.

Description

RELATED APPLICATIONS[0001]This application is a continuation of application Ser. No. 12 / 313,893 filed Nov. 24, 2008.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a profile formed of a strip-shaped rolling stock having an initial material thickness and including at least one thickness-reduced section having a thickness that is smaller than the initial material thickness of the rolling stock, and at least one bend. The present invention also relates to a method of forming such a profile.[0004]2. Description of the Prior Art[0005]Profiles, such as used, e.g., in the mounting or installation technology are produced, e.g., from a strip-shaped rolling stock by deformation in a rolling plant. The profiles can have a round, polygonal, or C-shaped cross-section.[0006]In order to reduce the costs of a material, U.S. Pat. No. 4,233,833 suggests, e.g., to reduce thickness of at least one section of the rolling stock so that the material thickne...

AI Technical Summary

Benefits of technology

[0012]By the arrangement of the at least one thickened region in the region of the bend, i.e., in or at the bend of the profile, the stiffness of the profile in a high-loaded region of the material-optimized profile is improved. The inventive profile characterized, at a contour comparable with the contour of a profile formed of a strip-shaped rolling stock having a constant thickness, by a small increase of the used material, with the loss of stiffness, which is caused by thickness reduction, being compensated at least partially by the at least one thickened region or by resulted increase of local stiffness of the profile. If necessary, the stiffness of the produced profile can even be increased in comparison with a profile formed of a strip-shaped material with a constant thickness. The at least one thickened region is formed by material accumulation and is formed, during formation of the thickness-reduced section, with correspondingly formed rolls during the cold rolling process in the same rolling step. Providing a thickened region formed of material accumulation on a side of thickness-reduced region ensures the structural integrity of the profile and substantially increases the stiffness of the profile in the thickness-reduced area.

[0014]Advantageously, the at least one thickened region is provided adjacent to the at least one bend. This enables a simple deformation of the strip-shaped rolling stock and, at the same time, improves the stiffness of the profile despite the presence of a thickness-reduced section.

[0016]Advantageously, the material thickness of the at least one thickened region corresponds to 1.1-2 times of the initial material thickness of the rolling stock the profile is formed of. This insures an advantageous improvement of the stiffness of the material-optimized profile.

[0017]Advantageously, the at least one thickened region has a material width in a direction transverse to a longitudinal axis of the profile and corresponding to 1.0-5.0 times of the initial material width of the rolling stock the profile is formed of. This likewise insures an advantageous improvement of the stiffness of the material-optimized profile.

Problems solved by technology

The drawback of the proposed solution consists in that in order to optimally use the material-saving effect, as large as possible thickness reduction is desired.

The local thinning of the rolling stock, however, can lead to the loss of stiffness, which limits the maximal possible reduction of the thickness.

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