Comparison of Deep Drilling Efficiency between Ultrasonic Vibration-Assisted Drilling and Conventional Drilling based on Specific Energy Consumption
Main Article Content
Abstract
Deep hole drilling remains a persistent challenge in both research and industry due to high friction and inadequate
chip evacuation, which leads to inefficiencies. This study evaluates the efficiency of deep drilling using ultrasonic
vibration-assisted drilling (UAD) by comparing it with conventional drilling (CD), with specific energy
consumption (SEC) as the primary metric derived from torque measurements. Here, SEC is defined as an
accumulated function integrating energy consumption over the entire drilling process, mitigating non-linear and
stochastic variations common in deep drilling. Experiments were conducted on Al-6061 aluminum alloy under
continuous dry drilling conditions, with variations in spindle speed, feed rate, and hole diameter. The results
demonstrate that UAD significantly improves drilling efficiency compared to CD. Specifically, the SEC value for
UAD was approximately 21.44% to 77.74% lower than that for CD across all experimental conditions. Moreover,
with optimized parameters, UAD achieved a 25% increase in material removal rate (MRR) and a 33.4% reduction
in SEC compared to CD. These findings highlight UAD’s potential to enhance deep hole drilling efficiency,
offering promising applications for industrial machining processes.
Keywords
Ultrasonic vibration-assisted drilling, deep hole drilling, specific energy consumption, material removal rate, Al-6061 aluminum alloy.
Article Details
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