BEHAVIOR OF SOME DISTINCT METALLIC MATERIALS DURING THE ELECTROCHEMICAL MACHINING WITH FORCED HYDRODYNAMIC DEPASSIVATION
Abstract
The electrochemical machining with forced hydrodynamic depassivation allows the material removal from workpiece by electrochemical erosion. The products resulted as a consequence of the electrochemical reactions developed between the workpiece material and electrolyte are removed from the machining zone by forced circulation of the electrolyte. A theoretical analysis led to formulation of several hypothesis concerning the behaviour of some metallic materials when test samples presenting a conical surface are affected by the electrochemical machining process with forced hydrodynamic depassivation. In the paper, the results of some experimental researches developed on test samples from steel, bronze and aluminium are presented. By mathematical processing of the experimental results, some empirical mathematical models were established. The empirical models highlight the influence exerted by the gap size, by the size of angle corresponding to the conical surface and by the voltage applied to the two electrodes on the size of the final gap and on the quantity of material removed from the test piece, for a certain duration of the machining process.
References
2. Brusilovski, S., Adjustment and readjustment of electrochemical machines and control of the process parameters in machining shaped surfaces, Journal of Materials Processing Technology, Vol. 196, No. 1, 311–320, (2008).
3. Coteaţă, M., Slătineanu, L., Dodun, O., Nagîţ, G., Study on electrochemical machining process. Proceedings of the conference “Modern technologies, quality, restructuring 2003”, Vol. 2, Technical University of Moldova from Chişinău, Republic of Moldova, pp. 45-47, (2003).
4. Creţu, G., Fundamentals of experimental research. Laboratory handbook (in Romanian), “Gheorghe Asachi” Technical University of Iași, (1992).
5. Klocke, F., Zeis, M., Harst, S., Klink, A., D. Veselovac, D., Baumgärtner, M., Modeling and Simulation of the Electrochemical Machining (ECM) Material Removal Process for the Manufacture of Aero Engine Components, 14th CIRP Conference on Modeling of Machining Operations (CIRP CMMO), Procedia CIRP 8, pp. 265 – 270, (2013)
6. Kurita, T., Chikamori, K., Kubota, S., Hattori, M., A study of three-dimensional shape machining with an ECµM system, International Journal of Machine Tools & Manufacture, Vol. 46, No. 12-13, pp. 1311–1318, (2006).
7. Schulze, H.P., Schatzing, W., Influences of different contaminations on the electro-erosive and the electrochemical micro-machining, The Seventeenth CIRP Conference on Electro Physical and Chemical Machining (ISEM), Procedia CIRP 6, pp. 58 – 63, (2013).
8. Slătineanu, L., Nagîţ, G., Dodun, O., Coteaţă, M., Chinesta, F., Gonçalves-Coelho, A., Pamies Teixeira J., San Juan, M., Santo, L., Santos, F. Non-traditional manufacturing processes, Tehnica Info Publishing House, Chişinău, Republic of Moldova, (2004).
