Experimental research of the effect of face milling strategy on the flatness deviations

ABSTRACT

In this paper the dependencies between face milling strategy of EN AW6082-T6 aluminum alloy samples, with difference thicknesses (6, 8, and 12 mm) and two cold rolling directions, and flatness deviations were presented. Three strategies of milling included different proportions of material removed from both sides of the plates. This approach allowed to control the proportions of residual surface stresses on both sides of the specimens, which were created by the cold rolling process. The face milling strategy involving the symmetrical removal of material from both sides of the sample resulted in the best results of flatness deviations. This strategy was most effective for both rolling directions. It has been observed that the use of an appropriate face milling strategy is particularly important for thin sheets (6 mm thick). In the case of thicker plates (12 mm thick), the selected strategy has less impact on the final values of flatness deviations.

KEYWORDS:

• milling
• flatness
• strategy
• aluminum
• surface
• rolling
• direction
• residual
• stresses

Acknowledgments

The authors would like to acknowledge Eng. Roman Jakubek and MSc. Eng. Jan Westa from the company Mechanika - Radmor Sp. z o.o. in Gdynia, Poland, for supplying materials for this work and substantive consultations.