THE INFLUENCE OF ZINC LAYERS ON DRILLING RESISTANCES
Journal Title: Tribologia - Year 2010, Vol 232, Issue 4
Abstract
The work presents a means of “lubrication” of drills with a deposited zinc layer using the electrolytic method. During the drilling between the tool and the drilled object, electron transfer of an electrical charge occurs. Zinc layer deposition on the drill surface is conducted before the drilling process in the electrical circuit created from a constant current source, drilling machine, electrolyte, and auxiliary soluble electrode. Electrical voltages between the electrodes are chosen beyond the discussed electrolytic system. The research of the constant current linear voltammetry of the polarised samples and the twist drills of HSS steel proved that the quantity of electrical charge taking part in the electrocrystallization of zinc is proportional to the geometric work surface. This allowed us to estimate the deposited layer thickness on the drill (with an unsteady work surface), reduce the resistance of drilling, improve the microgeometry of the work surface of steel 45, and leave the protective layer (zinc) on the cut surface.<br/><br/>
Authors and Affiliations
Mirosława Kosmynina
Keywords
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