Investigation of Machinability in Milling of PTFE under Dry and Wet Conditions
DOI:
https://doi.org/10.58915/aset.v4i1.1945Abstract
This study investigates the effect of the endmill flute number and cutting conditions on the milling of PTFE (polytetrafluoroethylene). High-speed steel (HSS) tools with 2 flutes and 4 flutes were evaluated by varying spindle speeds, feed rates, and cutting conditions (dry and wet). Surface roughness and chip formation were the major criteria used to assess the performance of different cutting conditions. The study found that the 2-flute end mill decreased PTFE milling surface roughness better than the 4-flute tool. Due to PTFE’s self-lubrication, dry cutting produces smoother surfaces than wet cutting. The self-lubricating feature of PTFE caused short, discontinuous chips during dry cutting and tangled, needle-like chips in wet conditions owing to coolant interference. These findings contribute to improving the machining of PTFE, bringing insights into selecting the correct cutting tools and cutting conditions.
Keywords:
Polytetrafluoroethylene, Milling, Dry and wet conditions, Endmill flute numberReferences
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