Affiliation:
1. Department of Mechanical Engineering, Koszalin University of Technology, Racławicka 15-17 Street, 75-620 Koszalin, Poland
Abstract
Electrical steels are magnetically soft materials and are widely used in the electrical industry for the construction of power transformer cores, distribution transformers, current transformers, and voltage transformers. An important parameter of electrical components, which determines the efficiency of devices, is energy loss during remagnetization. Energy losses are caused by eddy currents, hysteresis, and magnetic delay associated with the low quality of the cut edge after the cutting of steels, and material deformations and excessive stress concentration in the surrounding cutting zones. Common techniques for cutting electrical materials in industrial lines include mechanical cutting and laser cutting. Work has shown that mechanical cutting of electrical steel single layers results in the occurrence of large deformation zones, and in cutting processes with a high-pressure abrasive water jet (AWJ), significant uplifts of material and burrs at the bottom edges of sheets occur. The problem of increasing the cutting quality was solved through selecting the stream parameters for bundle cutting of electrical steels. It has been shown that in the process of cutting electrical sheet bundles, the height of burrs on the cut surface and the zone of plastic deformation are reduced. The work also presents comparison and analysis of characteristic features of the cut edge of electrical sheets obtained through high-pressure abrasive water jet and mechanical cutting processes. The influence of the type and processing parameters on the characteristic features of the material hysteresis loop was determined.
Funder
Minister of Education and Science of the Republic of Poland
Subject
General Materials Science
Reference38 articles.
1. Core loss reduction in grain oriented silicon steel sheets by two-sided laser scribing in the presence of a magnetic field;Jahangiri;J. Alloys Compd.,2022
2. Effects of different cutting methods for electrical steel sheets on performance of induction motors;Bayraktar;Proc. Inst. Mech. Eng. Part B J. Eng. Manuf.,2016
3. Importance of punching and workability in non-oriented electrical steel sheets;Kurosaki;J. Magn. Magn. Mater.,2008
4. Steentjes, S., Hameyer, K., Vogt, S., Bednarz, M., Volk, W., Dierdorf, J., and Hirt, G. (2013, January 19–20). Influence of material processing steps annealing and cutting on magnetic materials’ properties relevant for electrical machine design. Proceedings of the Forming Technology Forum, Herrsching, Germany.
5. How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel;Winter;Mater. Des.,2021