Friction drilling is a non-conventional process that generates heat through the interaction
between a rotating tool and a workpiece, forming a hole with a bushing. In this study, the effect of
the preheating temperature, rotational speed, and feed rate on the induced temperature during the
friction drilling of A356 aluminum alloy was investigated. This study aimed to analyze the influence
of friction-drilling parameters on the thermal conditions in the induced bushing, where it focused
on the relationship between preheating and the resulting heat generation. The analysis of variance
(ANOVA) approach was carried out to optimize the friction-drilling parameters that contributed
most to the induced temperature during the friction-drilling processing. Experiments were conducted
at various preheating temperatures (100 °C, 150 °C, 200 °C), rotational speeds (2000 rpm,
3000 rpm, 4000 rpm), and feed rates (40 mm/min, 60 mm/min, 80 mm/min). The induced temperature
during the process was recorded using an infrared camera, where the observed temperatures
ranged from a minimum of 154.4 °C (at 2000 rpm, 60 mm/min, and 100 °C preheating) to a maximum
of 366.8 °C (at 4000 rpm, 40 mm/min, and 200 °C preheating). The results show that preheating
increased the peak temperature generated in the bushing during friction drilling, especially at lower
rotational speeds. The rotational speed rise led to an increase in the induced temperature. However,
the increase in the feed rate resulted in a decrease in the observed temperature. The findings provide
insights into optimizing friction-drilling parameters for enhanced thermal management in A356
aluminum alloy. |
