Technological aspects of rolling the thinnest strips from titanium nickelide

A study of the rolling conditions for titanium nickelide thin strip is aimed at determining the optimal process parameters that ensure the best product quality and maximum productivity. The object of the study is various rolling process parameters, such as rolling force and strip tension during rolling. This paper characterizes the rolling process, examines the sensors and instrumentation used in rolling process studies, and analyzes methods for measuring rolling parameters. The applied methodology for studying metal forming equipment and processes is based on the use of digital technologies, which offer mobility, high measurement accuracy, and the ability to perform calculations in real time. The proposed measuring system interfaces classic strain gauge bridge circuits with a personal computer via analog-to-digital con-verters. This paper presents an analysis of scientific and technical literature on the technological processes of rolling thin strip on twenty-high mills and forming alloys with a memory effect. The potential for the practical use of nitinol in the form of thin strip in various fields of science and technology, from bio-technology to aerospace engineering, is demonstrated. Experimental studies of process factors influencing the production of high-quality ultra-thin strip were conducted, including rolling energy parameters, inter-mediate heat treatments, roll pyramid profiling, and roll surface microgeometry. These factors significantly influence longitudinal and transverse thickness variation, flatness, and surface quality of the resulting strip. Based on the experimental data, process modes for producing final rolled products were developed. Pro-posed equipment modernization measures enable the production of single-piece and small-batch products with unique properties. A method for manufacturing work rolls with increased requirements for manufac-turing accuracy and surface quality was proposed and tested. The comprehensiveness of the study is en-hanced by modeling the process under study using finite element analysis (FEA) programs. The final result of the study will be the creation of a mathematical model for rolling ultra-thin nitinol strip on a 20-high rolling mill. This model not only enables process calculations but will also be used in the development of a fully-fledged automated process control system for the unit in question. In this paper, the main features and direc-tions of rolling the thinnest nitinol tapes are investigated. The mechanisms of improving the quality of the produced tape through the use of modern technology for regulating and controlling the rolling modes of the tape were considered. The main direction should be considered the modernization and improvement of various types of technologies for rolling the thinnest tapes, methods and technical means that could pro-vide not only productivity growth, but also improve the quality of finished products.