In the production of high quality steel products packaging details

Fine steel straps, as the name implies, is to choose high quality steel processing and packaging, in the process of production, relatively strict to the requirement of incoming material. The chemical composition of steel shall conform to the provisions of national standards, material thickness and width size should comply with the rules, no tin oxide surface, no crack of edge, no strip cut, embossing, convex defects such as bubble and hierarchical, coil tower, volume, etc. High quality steel products packaging with smooth surface, can not have cracks, folds, layered, metal inclusions, coarse burr and phosphor layer, allow the depth or thickness, height is not more than half of the allowable deviation, local small sag, pitting, bump or depth greater than zero. The erythema of 8 mm, fine steel pack side must not have cracked edges, allowing a slight burrs, the depth is not greater than the width of the allowed deviation of 10%. As we all know, the high quality steel straps, using small diameter of work roll is beneficial. But the work roll diameter is too small due to the lower rigidity, also can appear near the strip edge thinning, produce the high quality of the flat strip steel can't be guaranteed. Therefore, in order to prevent the small diameter of the whole of work roll bending, intermediate roll for mobile add bending device, which can be obtained as shown in figure 3 - 89 b high quality strip steel, this is the UC rolling mill.