Influence of different cooling strategies on the process temperatures and chip transport quality in one-shot drilling CFRP/Al-stacks

This study focusses on the influence of different cooling strategies process temperatures and chip transport quality in one-shot drilling CFRP/Al-stacks. In addition to maximum both individual stack components, temperature changes CFRP material due hot aluminium interactions are analysed. The following compared: compressed air through tool, cryogenic CO 2 at bore exit as well combination both. It is shown that significantly differ for tested strategies. Whereas -cooling Al-plate results overall smaller chips, use mainly improves evacuation. shows high potential prevent clogging flute its negative impacts workpiece quality.