Increase of Efficiency of Electric Arc Cutting with a Bipolar Electrode Tool

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Increase of Efficiency of Electric Arc Cutting with a Bipolar Electrode Tool

Journal Title: Центральноукраїнський науковий вісник. Технічні науки - Year 2018, Vol 31, Issue

Abstract

Modern engineering applies electrical, physical and chemical methods for cutting hard-to-treat materials. In most cases it is the process productivity that determines the choice of a cutting method. We know the technological shaping scheme for electric arc cutting which compensates the electric erosion wear of the electrode tool due to the parallel pulling of two electrode tools (that is, a bipolar electrode tool) with the direct pumping of process water through the front inter-electrode gap clearance. However, the direct pumping creates conditions for the concentration of torsion products in the lateral gap clearance. As a result, long arcs appear which, on the one hand, form an inclined cutting surface and increase cutting time, and, on the other hand, they destroy the electrode holders. Besides, technical water, as the process water, partially conducts electric current. Due to this part of power linked up with the electrode is not effectively used/ The objective of the work is to increase the efficiency of electric arc cutting with a bipolar electrode tool by applying reverse pumping of the organic medium. We know the technological scheme for shaping which compensates the wear of the bipolar electrode tool due to its pulling in the cutting zone, in which the direct pumping of process water is used. However, the application of this technology creates conditions for the concentration of erosion in the lateral inter-electrode gap clearance. As a result, long arcs appear that form an inclined cutting surface and destroy the electrode holders. And the leakage of current (through water) reduces the cutting performance. The work suggests a new technological shaping scheme for the electric arc cutting by a bipolar electrode tool which uses reverse pumping and organic medium. The new scheme allowed eliminating the above-mentioned disadvantages of the known scheme. Experimental research was carried out and mathematical models of technological characteristics which allow managing and predicting productivity, accuracy and quality of electric arc cutting have been obtained. Thus, a high-performance method of electric arc cutting of metals by a bipolar electrode tool has been studied and improved by using reverse pumping of the organic medium.

Authors and Affiliations

Viktor Bokov

Keywords

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EP ID EP481522
DOI 10.32515/2409-9392.2018.31.47-58
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