FRICTION STIR DRILLING OF AA7075 ALUMINUM ALLOYS | ||||
| Engineering Research Journal (Shoubra) | ||||
| Volume 49, Issue 1, July 2021, Page 42-48 PDF (1.2 MB) | ||||
| Document Type: Research articles | ||||
| DOI: 10.21608/erjsh.2021.227485 | ||||
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| Authors | ||||
| Ahmad J. N. S. A. AlObaid; S. A. Abdallah; A. . M. Gaafer | ||||
| Mechanical Engineering Department, Shoubra Faculty of Engineering, Benha University, Cairo, Egypt. | ||||
| Abstract | ||||
| In the present investigation, holes were produced in AA7075 aluminum alloy sheets using friction stir drilling. The friction stir drilling process was performed using computer numerical control (CNC) vertical machining center. The influence of the spindle rotational speed and the tool’s conical angle on the hole characteristics, typically, hole diameter, bushing height and thickness, were investigated. The analysis of variance (ANOVA) calculations were performed to estimate the significance of the studied process parameters. Regression analysis was carried out to find correlations between the investigated friction stir drilling process parameters and the fabricated hole characteristics. The results revealed that the conical angle is the most influential factor that affect the hole characteristics. Increasing the tool rotational speed reduces the hole diameter and the bushing thickness. However, increasing the conical angle increases the bushing height. The developed regression equations showed high accuracy. The equations for the hole diameter, bushing height and bushing thickness have mean absolute error (MAE) values of 0.6%, 3.04% and 6.10%, respectively. | ||||
| Keywords | ||||
| Friction stir drilling; Aluminum Alloys; Design of Experiments | ||||
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