Among metal rolling is quite widein demand in the construction industry is a thin metal sheet. Its application is very diverse, and in each case there are technological features.
What is a metal sheet?
Thin-sheet metal is manufactured fromcarbon steel. Thickness of sheets can be from 0,4 mm. This is a very thin rolling, used in special high-tech work. Modern production technologies and improved chemical composition provide high quality products. The flawless surface, which has thin metal sheets, does not need additional processing before applying paint, which saves time during work.
Production of sheet metal
Manufacture of metal sheets by coldor hot rolled products. In the hot-rolled method, low-alloy and carbohydrate steel is used. In this case, a perfectly flat surface is not obtained due to its uneven cooling. These thin metal sheets are used for the manufacture of household appliances, hulls, aircraft, in construction and engineering.
The cold-rolled method provides for the application ofhot-rolled billets of carbon and low-carbon steel. After passing the further treatment to remove scale, the sheet is cold rolled. As a result, a thinner metal sheet with a high surface quality is obtained, a thickness tolerance of not more than ± 0.01 mm and higher technological properties. It is used in the future for the manufacture of various machines and mechanisms. In any case, the use of specialized equipment is required for sheet metal production.
Properties of sheet metal
Sheets made by hot-rolled andcold-rolled method, differ in their properties. These features are taken into account when using this building material. Hot-rolled sheet has increased rigidity, so stamping and minting almost does not lend itself. Welding of such sheet can lead to its temperature deformation.
The popularity enjoyed by the subtlemetal sheet, due to the presence of a large number of positive characteristics, such as reliability, versatility, strength, durability, ease of installation, etc. In the production of machinery, construction and medical industry, galvanized sheet (coated on one or both sides with zinc) is especially in demand. The surface of such a sheet with high-quality galvanizing is very clean, smooth, without the slightest cracks.
Application
Sheet rolling is used in a variety ofspheres of production. It is practically impossible to name an area where a thin metal sheet would not be in demand. This is the construction of fences, roofs, and wall lining, the manufacture of stairs and metal structures. Used sheet metal for the manufacture of refrigerators, various containers, drainpipes. In recent years, this material has also been in great demand for decorating country cottages. It is impossible to imagine without him the creation of cars, aircraft and other equipment.
A very thin metal sheet is calledfoil. Radio equipment has found use of copper foil as a package of confectionery products, aluminum - for packaging tea. Its thickness is no more than 0.2 mm.
How to measure the thickness of a sheet?
Measuring the thickness of a sheet metal with the help ofrulers, roulettes or calipers will not allow to do this with all accuracy. With their help you can get only approximate values. Measurement by calipers is done only along the edge of the sheet, the thickness of which can vary across the whole area, especially if it is a matter of substandardness. In order to accurately measure a thin metal sheet, it is necessary to use a special tool called "sheet measure".
Methods for processing sheet metal
In the manufacture of a certain productconfiguration it is necessary to conduct the appropriate processing of the sheet profile. As a result, the appearance of the material and its quality should not be affected. There are several different technological operations that are used to process a thin metal sheet. This is welding, cutting, bending, etc.
The most common method of processing is bending.Performed when stretching and compressing the outer layer. Can be hand-held when using tools such as a hammer, pliers, vice, or mechanical, performed on modern equipment. Manual bending is a laborious process, so it is only performed for bending thin metal sheets with a thickness of no more than 0.6 mm.
Welding is applied when there are no specialrequirements to the appearance of the product. A metal sheet with a thickness of less than 3 mm can be easily melted, resulting in holes that are very difficult to brew then. For welding sheets up to 2 mm thick, a constant current is used. In the case where it is required to weld a thinner metal, small currents and electrodes of smaller diameter are used.
The assortment of metal sheets on the construction market is quite large, which allows you to choose the material most appropriate to the task.
