Listogians are devices for cold flexion of metal, used in various fields of human activity, but indispensable in construction. The principle of work of leaf bends is simple. With the help of various mechanisms under the influence of various types of strength, the leaf gigs bends the metal sheet, gives it the necessary shape. According to the principle of operation, the following types of leaf beams are distinguished:
— leaf -beam press;
— rotary leaf gourgeon with a beam;
— Rotation leafgog, the action of which is based on the use of a certain number of rollers (from two to four).
Also, depending on the drive used, hydraulic, pneumatic, electromechanical, mechanical and manual leaf bends are distinguished. Using leaf bends, you can create the necessary profile for construction from a sheet of metal. For a long time in industry, only manual leaf bends were used, which significantly reduced their functionality. But already in the second half of the twentieth century with the development of industrial production of means of production, leaf bends began to appear, the work of which was not based on manual work, which largely increased the efficiency of work on them and allowed to create various objects from a metal sheet with the help of leaf bends that were not just in forms, and in a certain kind of works of construction art. Now leaf bends are equipped with modern means of safeness, and the process of functioning of leaf beams is largely automated, which makes work on them more and more comfortable, at the same time, showing the indispensability of these mechanisms in construction and other areas of the national economy.
