Aluminum plate strip pattern bad elimination method "stretching straightening"

Tensile straightening is mainly used to solve the various types of bad problems generated in the process of aluminum plate and foil processing, the role has the following aspects:

1, get a good shape. By stretching and bending straightening, can completely eliminate the surface of the wave edge, wave shape, bending and slight sickle bend, thus, greatly improve the flatness of the sheet.

2, to improve the anisotropy of the material. The yield limits of deep drawn thin plates are often anisotropic in both longitudinal and transverse directions. Therefore, when the thin sheet is deep drawn, the thickness of each part of the different parts will be uneven in the extension of each part, which will cause the skirt lace defect of the punched part, resulting in the increase of the blanking waste rate. After straightening by stretching and bending, this situation will be greatly improved.

3, eliminate the yield platform, prevent the formation of the slip line, after cold finishing can achieve this purpose. In the use of tensile bending straightening, in the case of small deformation rate can also achieve this effect.

The working principle of stretch straightening: stretch straightening is the treatment of aluminum by stretching the stretching straightening device to exceed the yield point of the product, resulting in permanent deformation. The principle of tensile straightening is to use the workpiece is not straight when the longitudinal fiber is inevitably uneven, and the length of the uneven fiber is subject to plastic stretching to achieve the same length after removing the external force must be basically equal to the elastic complex amount to restore to a stable state to achieve the purpose of straightening.

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