Abstract
A mathematical model to predict the penetration length of lubrication is developed based on capillary rise theory. This model is used to study the effect of different parameters on lubricating action during vibration assisted machining. Time-variant size of micro-channel between cutting tool and wok piece is analyzed. It is revealed that the filling length depends mainly on lubricant physical properties, cutting parameters and vibration parameters. Based on the experimental results, the predicted capillary rise values are found to agree well with the experimental results. Cutting experiments are also carried out to investigate the influence of lubrication and vibration assistance on cutting force, chip morphology, adhesion and chip-tool contact length. It is indicated that lubrication during vibration assisted machining provides better cutting performance. However, the cutting force reduction decreased with the increased cutting speed and tool frequency, which is in good agreement with the predicted result.
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