Method and device for continuously stretch-bend-leveling metal strips

Abstract

The invention relates to a method and a device for continuously stretch-bend-leveling metal strips, wherein a strip under a tensile stress below the elastic limit is alternatingly bent about at least four straightening rollers in the plastic or elastic-plastic region and thereby undergoes plastic stretching. The bending radii of all four straightening rollers are thereby set individually and independently of each other, as the straightening rollers are set up having individually controlled positions.

Description

technical field [0001] The present invention relates to a method and apparatus for stretching-bending-levelling of a metal strip under tensile stress below the elastic limit or yield point around at least four leveling rollers in the plastic range or elastic-plastic Alternately bent over a range and subjected to plastic stretching. These smoothing rolls, which act plastically or elasto-plastically, can also be referred to as stretching rolls. The degree to which the metal strip (total) is plastically stretched and thus elongated is called the degree of stretch. [0002] With this stretching-bending-leveling method, uneven metal strips can be leveled so that their unevenness can be eliminated. Unevenness means, for example, metal strip corrugations and / or metal strip crescent-shaped defects, which are caused by length differences of the metal strip fibers in the plane of the metal strip. However, this unevenness also refers to a warping of the metal strip in the longitudinal...

AI Technical Summary

Problems solved by technology

But the possible result is that the final bending is carried out with a plastic bending deformation as high as possible, and then the metal strip can only be bent elastically or mainly elastically

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