Stepanenko O. Development of methods for calculation and improvement of resource-saving technology of production of pipes of oil and gas variety of high quality

The production technology of hot-rolled pipes on the pipe-rolling unit with pilger mill. Patterns of the effect of the deformation parameters of the process of manufacturing hot-rolled pipes on a pipe-rolling unit with pilger mills on the conditions for the formation of accuracy and quality of rolled pipes. The method of mathematical modeling of technological processes with the use of computer technology; experimental studies were performed by direct physical modeling in industrial pipe-rolling installations with piligrim mills; theoretical studies; methods for building geometric models of rolls and the construction of work stands using computer-aided design systems "Compass-3D" and "SolidWorks"; the use of experimental and theoretical research methods, industrial testing. The thesis is aimed at the development of the technology for the production of oil-grade pipes on a pipe-rolling unit with piligrim installations. A new scientific and technical solution has been implemented - the development of elements of the theory and fundamentals of a new energy-efficient production technology for high-quality pipes of an oil mix on a rolling mill with pilger mill. The problem is solved by a theoretical and integrated industrial experimental study of the processes of helical and periodic rolling of pipes. Practical value - the creation of an improved competitive technology for the production of large-sized oil country tubular pipes on a pipe-rolling unit with piligrim mills. A technology has been developed that provides high-quality pipes without a horizontal press and additional heating, through the implementation of "direct" firmware continuously cast billets. This technology allows for 70% of the size of rolled pipes to reduce production costs on average about $ 16 per tonne of pipes. Received a further development of the study process oblique roll firmware continuous casting. Designed and tested the technology of direct firmware uninterrupted workpiece. Industrial approbation of direct firmware showed the effectiveness of the proposed technology in comparison with the technology of firmware on the workpiece on the press. The developed technology makes it possible to reduce, depending on the product mix and on the labor intensity of the pipes produced, by 1.9-5.2%. For the first time, the technological parameters of the process and the necessary conditions for applying a deactivating lubricant to the inner surface of the rolled sleeves are described. Implemented. Metallurgy, rolling production.