PDF Печать E-mail

DOI: https://doi.org/10.15407/techned2020.06.061

ELECTROTECHNICAL COMPLEX FOR ELECTRODYNAMIC PROCESSING OF WELDED JOINTS

Journal Tekhnichna elektrodynamika
Publisher Institute of Electrodynamics National Academy of Science of Ukraine
ISSN 1607-7970 (print), 2218-1903 (online)
Issue No 6, 2020 (November/December)
Pages 61 - 68

Authors
L.M. Lobanov2*, I.P. Kondratenko1**, V.M. Mikhalskyi1***, M.O. Pashchin2****, O.M. Karlov1*****, V.V. Chopyk1******, O.L. Mykhodui2*******
1- Institute of Electrodynamics of National Academy of Sciences of Ukraine,
Peremohy av., 56, Kyiv, 03057, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
2- E.O. Paton Electric Welding Institute of National Academy of Sciences of Ukraine,
Kazymyr Malevych St., 11, Kyiv, 03150, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
* ORCID ID : https://orcid.org/0000-0001-9296-2335
** ORCID ID : https://orcid.org/0000-0003-1914-1383
*** ORCID ID : https://orcid.org/0000-0002-8251-3111
**** ORCID ID : https://orcid.org/0000-0002-2201-5137
***** ORCID ID : https://orcid.org/0000-0002-1350-1870
****** ORCID ID : https://orcid.org/0000-0002-5046-5223
******* ORCID ID : https://orcid.org/0000-0001-6660-7540

Abstract

The composition of a two-channel switching power supply for electrodynamic processing of welded joints is determined, which consists in simultaneous action on a limited area of the electric current seam and compressive force of the electrode of such values that the electroplastic effect becomes possible. A linear electromechanical induction transducer is used to create the force pressure. The duration of the compressive phase of the power pulse is chosen to be longer than the duration of the current pulse, which reduces the probability of rupture of the electrical circuit and the release of thermal energy. By controlled delay of the beginning of the current pulse, synchronization of both factors of the electroplastic effect is achieved. The parallel inclusion of semiconductor devices that switch the discharge circuit alternately is proposed, which in the conditions of operation of electrical equipment with a pulse frequency of up to 10 Hz reduces the heat load. Experimental studies have shown a twofold increase in the number of cycles before the destruction of the samples with symmetrical bending. Comparison of two-channel and single-channel electrodynamic processing revealed a twofold reduction in power consumption in a two-channel device. References 8, figures 3, table 1.

Key words: electrodynamic processing, power topology of pulse generator, thermal load of semiconductor devices, synchronization of influencing factors.

Received: 02.07.2020
Accepted: 12.08.2020
Published: 21.10.2020

 

References
1. Lobanov, L., Kondratenko, I., Zhiltsov, A., Pashchin, N., and Mikhodui, O. Development of post-weld electrodynamic treatment using electric current pulses for control of stress-strain states and improvement of life of welded structures. Materials performance and characterization. 2018. Vol. 7. No 4. Pp. 2379-1365. DOI: https://doi.org/10.1520/MPC20170092.
2. Knysh V.V., Klochkov I.N., Pashulya M.P., Motrunich S.I. Improvement of fatigue resistance of thin-sheet welded joints of aluminium alloys using high-frequency peening. Automatic welding. 2014. No 5. Pp. 22-29. (Rus)  DOI: https://doi.org/10.15407/tpwj2014.05.04
3. Finkel V.M., Ivanov V.M., Golovin Y.I. Healing of cracks in metals by crossed electric and magnetic fields. Strength problems. 1983. No 4. Pp.54-58. (Rus) DOI: https://doi.org/10.1007/BF01522429
4. Knysh V.V. Determination of cyclic durability of structural elements during braking of fatigue cracks. Automatic welding. 2000. No 9-10. Pp. 73-75. (Rus)
5. Baranov Yu.V., Troitsky O.A., Avraamov Yu.S., Shlyapin A.D. Physical fundamentals of electropulse and electroplastic treatments and new materials. Moskva: MGIU, 2001. 844 p. (Rus)
6. Kondratenko I.P., Zhyltsov A.V., Pashchyn N.A., Vasyuk V.V. Selecting induction type electromechanical converter for electrodynamic processing of welds. Tekhnichna elektrodynamika. 2017. No 5. Pp. 83-88. (Ukr) DOI: https://doi.org/10.15407/techned2017.05.083
7. Kalantarov P.L., Tsejtlin L.A. Calculation of Inductance: Reference book. Leningrad: Energoatomizdat, 1986. 488 p. (Rus).
8. Yakovleva T.Iu. Local plastic deformation and fatigue of metals. Kyiv: Naykova dymka, 2003. 238 p.(Rus).

 

PDF

 

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.