Pharma Packaging Pure Aluminum Aluminum Foil Roll Jumbo

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Pharma Packaging Pure Aluminum Foil 8011 H18

The approximate calculation formula of tensile force P is: P=Rp0.2×B×H, where Rp0.2 is the yield strength corresponding to the tensile force, N/mm2; B is the width of the sheet, mm; H is the thickness of the sheet , mm.

Technical parameters of stretching machine

When BXH is less than or equal to 22500mm2, except for cold-work hardened plates, stretching and straightening can be carried out. In order to prevent breaking, the sheet is not allowed to have cracks, cracks, edge burrs and other defects before stretching.

In the process of hot rolling, shearing, annealing and quenching of aluminum alloy thick plates, due to changes in temperature, reduction, roll shape, and improper control of process cooling, the longitudinal bending, transverse bending, edge wave and internal stress will cause bad plates. shape, which can be eliminated by straightening. According to the equipment configuration, straightening can be divided into: roller straightening, flattening straightening and pincer stretching straightening. Because straightening is before aging treatment or machining, it is also called pre-straightening. Currently, the most widely used and most effective process is the stretching straightening method. 

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