DOI: https://doi.org/10.32515/2414-3820.2020.50.133-139

Increasing the Durability of Roller-electrodes in Electrocontact Surfacing of Parts of Mobile Agricultural and Transport Equipment

Viktor Dubovyk, Yurii Nevdakha, Viktor Pukalov, Vlvdyslav Chernov

About the Authors

Viktor Dubovyk, Professor, Doctor in Technics (Doctor of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, ORCID ID: 0000-0002-0372-1108

Yurii Nevdakha, Professor, Doctor in Technics (Doctor of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, ORCID ID: 0000-0003-4355-4065

Viktor Pukalov, Professor, Doctor in Technics (Doctor of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, ORCID ID: 0000-0002-0848-5861

Vlvdyslav Chernov, master, Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine

Abstract

During the operation of mobile agricultural and motor vehicles, their connections and parts are activated. This leads to a decrease in traction power, operating speed, quality and productivity when performing technological operations. Repair costs are constantly rising, so the question of finding inexpensive technologies for the restoration of worn parts is relevant. Such technologies include electro-contact surfacing. One of the reasons that constrains the widespread use of the method of electrocontact surfacing is the low stability of the electrode roller. Currently, little research has been conducted to study the wear of the electrode rollers and increase their wear resistance. The research on search of ways of increase of durability of rollers-electrodes at electrocontact surfacing is carried out. The operating conditions of the electrode rollers and their operation, the strength of the welded joint when using a tool with different degrees of operation were considered. The operation of the roller-electrode during electro-contact surfacing has a negative effect on the strength of the welded joint of the metal coating with the base due to the reduction of deformation of the filler wire. The results of tests for operation show that a significant reduction in the quality of the welded joint occurs when using electrodes made of hot-rolled copper after 1.5...2 hours of operation. It is not possible to fully compensate for the negative impact of the electrode operation on the quality of the welded joint by adjusting the technological modes of surfacing. This indicates the need for 2 - 3 times the replacement of such tools, after grooving their working surfaces on a lathe. Developed recommendations for the choice of sizes of rollers-electrodes used in electro-contact surfacing of parts of mobile agricultural and transport equipment.

Keywords

electrocontact surfacing, roller electrode, filler wire, wear resistance, metal coating

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References

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Copyright (c) 2020 Viktor Dubovyk, Yurii Nevdakha, Viktor Pukalov, Vlvdyslav Chernov