PREDICTION OF DEFECTS IN BENDED PROFILES

Abstract

The increase in the consumption of bent profiles, which has been observed in the last decade in various industries of production and construction, leads to the search for new technological solutions and the use of new materials that ensure high quality of products at minimal production costs. The wide use of profiles in construction (decorative wall and roof panels of external execution, internal decorative panels, power-bearing structures) leads to high requirements for their protective and decorative properties, which is achieved by the use of appropriate coatings. Bent steel profiles are increasingly used in machine building and other industries in recent years. They are used as a basis for various structures, from simple fences to complex machines and mechanisms. The quality of these profiles directly affects the strength, durability and safety of structures. In our time, the processes of direct production of profiles from sheet material, which has a multi-layer coating, which has already been applied in industrial conditions, are widely used. This coating has high strength characteristics, a wide range of colors and excellent corrosion resistance. Making a profile from such material is more effective than applying a coating to an already finished profile. The intensification of molding makes it possible to reduce the number of technological transitions, ensure the equipment becomes cheaper, increase its mobility, compactness, economy, reduce the cost of the space it occupies, reduce the time of reconfiguration, etc. Therefore, it is important to know how to determine the quality of bent profiles before using them. The main advantages of bent profiles include: an unlimited range of cross-sections of bent profiles obtained by profiling; high production productivity; the possibility of deformation hardening of the material, which is due to the features of the profiling process. Along with the advantages, there are quite high costs that arise as a result of the defect. These circumstances require an analysis of the reasons that can lead to defects in bent profiles. The work presents the classification of defects of bent profiles and the list of possible causes of their occurrence, which is an important and urgent task for the analysis of the technological processes of the production of bent profiles and ensuring their quality control.