Surface quality control of Al2O3 specimens after lapping

• Autorzy: Molenda J.

Identyfikatory

DOI

10.5604/12314005.1216577

• Języki publikacji: EN

Abstrakty

EN

The finishing processes are an important perspective to be considered today to meet the goals like parallelism, tolerances, flatness and smooth surface of workpieces. These processes are high-precision abrasive processes. A leading importance in this perspective has the lapping process. It leads to a surface with low roughness and high precision. This paper reports the results of surface analysis of sealing elements made of oxide ceramic Al2O3. Because of elements, application as sealing parts in water valves, high surface quality and flatness is required. To meet those requirements grinding and lapping were execute. The first was realized by elements manufacturer, the second – during experiments. Research was carried out on a plate-lapping machine ABRALAP 380 with a grooved cast-iron lapping plate and three conditioning rings. As abrasive material boron carbide was use. Surface quality was investigated firstly after grinding and then, after lapping. A Hommeltester T8000-R60 profilometer with a resolution of 0.01 μm was used. The surface roughness parameters Ra and Rk were studied in the light of varying lapping parameters, like grains size, lapping pressure, velocity and time. According to literature, those are the most extensively used parameters for describing the surface roughness after finishing processes. Additionally the Abbot Firestone curves were analysed.

Słowa kluczowe

EN

lapping; surface quality; ceramic machining

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 3
• Strony: 337--343
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Molenda J.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Bakharev, V. P., Dispersion of ceramics and composites in diamond finishing by free abrasive, Russian Engineering Research, Vol. 29, No. 2, 2009.
• [2] Bhagavat, S., Liberato, J. C., Chung, C., Kao, I., Effects of mixed abrasive grits in slurries on free abrasive machining (FAM) processes, International Journal of Machine Tools & Manufacture, No. 50, pp. 843-847, 2010.
• [3] Gafarov, A. M., Gafarov, V. A., Aziz, S. Sh., Kelbiev, F. M., Surface roughness in lapping with dosen removal of surface layer, Russian Engineering Research, Vol. 31, No. 11, 2011.
• [4] Kainer, G. B., Identification of methods and means of monitoring precision components in finishing operations and following manufacture, Measurement Techniques, Vol. 51, No. 10, 2008.
• [5] Klocke, F., Dambon, O., Behrens, B., Analysis of defect mechanisms in polishing of tool steels, Production Engineering Research Development, No. 5, pp. 475-483, 2011.
• [6] Marinescu, I. D., Tonshoff, H. K., Inasaki, I., Handbook of ceramic grinding and polishing, Noyes Publications/William Andrew Publishing, LLC., New York 2000.
• [7] Marinescu, I. D., Uhlmann, E., Doi, T. K., Handbook of lapping and polishing, CRC Press, 2007.
• [8] Molenda, J., Influence of lapping velocity, pressure, and time on ceramic elements machining result, Zeszyty Naukowe Akademii Morskiej w Gdyni, No. 79, pp. 102-108, 2013.
• [9] Molenda, J., Charchalis, A., Steel C45 elements lapping, Journal of KONES Powertrain and Transport, Vol. 21, No. 1, pp. 283-288, 2014.
• [10] Sreejith, P. S., Ngoi, B. K. A., Material removal mechanism in precision machining of new materials, International Journal of Machine Tools & Manufacture, No. 41, pp. 1831-1843, 2001.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.