STUDY ON THE INNER SURFACE FINISHING OF ALUMUNUM ALLOY 2014 BY BALL BURNISHING PROCESS

M. H. El- El-Axir; O. M.  Othman; A. M.  Abodiena

doi:10.66411/jer.v5i5.386

Authors

M. H. El-Axir Faculty of Engineering, Al-Fateh University, Tripoli, Libya Author
O. M. Othman Faculty of Engineering, Al-Fateh University, Tripoli, Libya Author
A. M. Abodiena Mining, Industry and Energy Federatory – Garian, Libya Author

DOI:

https://doi.org/10.66411/jer.v5i5.386

Keywords:

Ball burnishing, Surface profile parameters, Aluminum alloy

Abstract

Tubular parts are important in many industrial applications (e.g. joints, fitting, etc.). The internal surface quality plays an important role in the part performance. Internal surfaces of non-ferrous materials are difficult-to-finish due to many problems encountered in grinding which is optimum for ferrous metals. Internal burnishing process is believed to be more suitable since it eliminates sticking, wheel dulling and overheating. In the present study, Aluminum alloy 2014 is selected as workpiece material, 8 mm carbon chromium balls were used for the internal burnishing process. statistically-based on experimental design (Response Surface Methodology) using central composite second-order rotatable design was used to improve the experimentation design without loss of accuracy of results. Mathematical models are presented for predicting five different surface profile parameters caused by internal-ball burnishing process parameters namely; burnishing speed, feed, depth of penetration, and number of passes. the results show that from an initial roughness of about Ra 4 μm, the specimen could be finished to a roughness average of 0.14 μm. The burnishing speed, feed and number of passes have the most significant effect on all surface profile parameters studied in this work.

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