Open AccessApplication and schemes of induction preliminary heating in magnetic-pulse treatment of metals
Author(s) -
Tetiana Gavrylova,
Е. А. Чаплыгин,
Svitlana Shynderuk
Publication year - 2021
Publication title -
vìsnik nacìonalʹnogo tehnìčnogo unìversitetu "hpì". novì rìšennâ v sučasnih tehnologìâh/vestnik nacionalʹnogo tehničeskogo universiteta "hpi". novye rešeniâ v sovremennyh tehnologiâh
Language(s) - English
Resource type - Journals
eISSN - 2413-4295
pISSN - 2079-5459
DOI - 10.20998/2413-4295.2021.04.03
Subject(s) - induction heating , joule heating , eddy current , electromagnetic induction , pulse (music) , magnetic field , mechanical engineering , production (economics) , electrical conductor , ferromagnetism , electrical engineering , work (physics) , materials science , process engineering , engineering physics , computer science , engineering , physics , voltage , condensed matter physics , electromagnetic coil , macroeconomics , quantum mechanics , economics
The features of the processes of magnetic-pulse processing of metals in traditional schemes of technological processes of modern industrial production are highlighted. The work is a brief description of the state, application, and also proposed induction pre-heating schemes in industrial magnetic-pulse processing of metals. A method for increasing the efficiency of performing specified production operations is considered. The use of preheating leads to a significant improvement in the quality of production operations while reducing energy consumption. New directions of magnetic-pulse processing of metals are noted, implying the transformation of the natural repulsive forces of the metal of the processed object into the forces of magnetic-pulse attraction with a decrease in the operating frequencies of the acting fields. A significant decrease in operating frequencies makes it possible not only to go from repulsion to attraction, but also to go from working with ferromagnetic metals to non-ferromagnetic ones. For example, it becomes possible to attract aluminum blanks. Examples of the use of induction heating of metal blanks in modern industry are given. Various devices used for these operations, offered on the modern market, by both domestic and foreign manufacturers, are considered. The physics of Lenz-Joule heat release is described, the result of which is the induction heating of conductors by Foucault currents in the external electromagnetic field of the instrument. Schemes are proposed for the practical implementation of preliminary induction heating during magnetic-pulse processing of metal blanks, allowing the use of both autonomous devices for exciting eddy currents and a stationary connection, for the same purpose, of an additional source of electricity. As a result of the work, the possibility of increasing the efficiency by increasing the plasticity of the metal when heating the workpiece, as well as possible limitations of the described technology associated with an increase in the active resistance of metals with an increase in the Lenz-Joule heat release is noted.