Galvanized steel sheet because of its surface coating, so in the processing and ordinary cold-rolled plate and plating plate there are many different places, the most important difference is that the coating must be completed under the premise of forming processing. The precautions for processing are as follows:
Mechanical properties are important indicators of measuring formability, is to determine and adjust the processing process of the important parameters, so the processing should be the first to be fully considered.
Parts of the complex shape, a greater degree of deformation, should be used multi-pass forming. If a forming, may be due to excessive deformation of the coating layer and the adhesion of the substrate. Processing should be based on mold shape, deformation characteristics, process conditions and other factors to set the appropriate gap, the gap should be set to consider the thickness of the coating.
Most coatings can be used as solid lubricants and can meet the lubrication requirements of most forming processes. Some coatings can improve the lubricity of the coating by adjusting the formulation. Such as the lack of lubricity of the coating, can be coated with oil, wax coating, peelable protective film and other methods to improve the lubrication. But should pay attention to the slippery agent easy to smoke dirt, should be cleared before installation. The peelable protective film should also be removed as soon as possible after the construction.
People should be based on equipment conditions, process conditions, parts and other factors set a reasonable processing speed, deformation speed is too high easily lead to peeling off the coating. When the temperature is low, the flexibility of the coating is reduced, so low temperature processing should be avoided. If the ambient temperature is low, the material should be heated to a certain temperature before processing.
Processing of the incision caused by corrosion prone to corrosion, it should take the necessary protective measures, such as coating protective coating, embedded seal and so on. Processing to minimize the cutting of the burrs, to prevent burr scratching the surface. Should keep all the surface in contact with the coating clean and tidy, in time to clean up the processing of chips and metal particles, to prevent foreign matter damage to the coating surface. Processing should try to reduce the roll surface or mold surface wear, to keep the contact surface smooth, to prevent the surface of the coating indentation, scratches and other defects. Should be used as far as possible with the factory pre-assembly and then send the site to install the construction method, the installation should take protective measures to prevent damage to the coating. Processing, such as the performance of the coating found to be damaged in a timely manner with a special repair paint to repair, to prevent corrosion at the break.
Galvanized sheet are attractive substitutes for wood and other materials because they have the advantage of preventing fading, weather resistance, and resistance to powdering. They minimize the maintenance costs of the building and, at the same time, a wide variety of colors, surface structures and coatings make it extremely flexible and optional.
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