MANUFACTURING TECHNOLOGY ENGINEERING SCIENCE AND RESEARCH JOURNAL Year 2023, Volume 23, Issue 1 © 2023 Manufacturing Technology. All rights reserved. ISSN 1213–2489 (print) | ISSN 2787–9402 (online) Journal home page and articles open access: http://www.journalmt.com Influence of using cutting fluid under the effect of static magnetic field on chip formation in metal cutting with HSS tools (turning operation) Umidjon Mardonov (0000-0003-3327-1846) 1 , Saidamin Khasanov (0000-0003-0864-4276) 2 , Andrey Jeltukhin (0000-0003-0106-9387) 1 , Shakhrizoda Ozodova (0000-0003-2619-4117) 1 1 Faculty of Machine Construction, Tashkent state technical university 100095, Tashkent. Uzbekistan. E-mail: fff8uma@mail.ru 2 Faculty of Mechanics, Tashkent state technical university 100095, Tashkent. Uzbekistan. E-mail: red_engi- neer94@mail.ru Article abstract Keywords This paper presents a novel methodology of using cutting fluids to improve the material re- moval process in metal cutting. To this end, a set of orthogonal cutting experiments are con- ducted using various cutting fluids to calculate the chip shrinkage coefficient in the material removal process. Chip shrinkage coefficient has been focused on as an important factor that affects chip formation in the material removal process. Using cutting fluids under the influ- ence of a static magnetic field in the metal cutting process is proposed as an innovative method to decrease the deformation that is emerged in the chip formation process while cutting cylindrical parts in lathes. Experiments showed that the application of cutting fluids under the influence of a static magnetic field decreased the shrinkage of the chip by up to 20 % in comparison to the conventional use of cutting fluids in turning cylindrical parts with HSS tools. Moreover, a mathematical model of the effect of boiling point and density of cutting fluids on tool flank wear has been developed in this paper. The obtained results pre- sent that the magnetized cutting fluids have an improved cooling capacity and they can be used as a modern cutting fluid in manufacturing. Cutting fluid Chip shrinkage Metal cutting Magnetic field Turning DOI 10.21062/mft.2023.006 Available online February 28, 2023 1 Introduction Today, increasing the strength, corrosion resistance, and heat resistance of metal cutting tools while maintaining their plasticity is one of the urgent problems of manufacture. The efficiency of mechanical processing largely depends on the cutting speed, the depth of the cut layer (depth of cut), the wear resistance of the cutting tool, etc. The wear resistance of the cutting tool is the most important indicator among these parameters. The wear re- sistance of the cutting tool is the main factor that determines its operational characteristics. One of the promising directions is the issue of increasing the wear resistance of the cutting tool as a result of creating special technological environments based on the use of lubricating-cooling liquids and changing their properties. Changing the physical-mechanical properties of the metal cutting environment and increasing the wear resistance of the cutting tool based on the creation of a lubricating-cooling technological environment under the influence of a magnetic field is one of the novel issues. Application of special lubricating-cooling technological conditions in the metal cutting process gives an opportunity to increase the stability of the cutting tool, reduce the cutting forces, improve the quality of the machined surface, increase the fatigue strength of the product, increase the labour productivity and other opportunities [1, 2, 3]. This, in turn, strengthens product competitiveness. There- fore, most of the mechanical processing is carried out using lubricating and cooling technological environments. Cutting fluids actively affect the frictional plastic contact surfaces of the cutting tool. The main purpose of using lubricating-cooling fluids is to reduce the cutting temperature, cutting forces, and power and, as a result, to increase the wear resistance of the cutting tool and the quality of the machined surface [4, 5, 6, 7]. Russian scientists A.G. Kisel, D.S. Rechenko, et al. have determined the effect of coolant, in 1.5% aqueous solution of soda ash, for wear and durability of hard-alloy turning tool in various processing modes of cutting steel 45, as well as the development of recommendations for the use of this coolant. As a result, they increased the cutting time by applying a particular cutting fluid [8].