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Hybrid Cold Air-Minimum Quantity Lubrication Strategy for Micro-milling Multi-directional T700 Carbon Fiber-Reinforced Polymer: Effects on Cutting Forces and Tool Wear
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DOI：10.1007/s11665-026-13801-6.png)
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Abstract
En 中文
Micro-scale machining of carbon fiber-reinforced polymer (CFRP) involves significant challenges including unstable cutting forces, delamination defects, and accelerated tool degradation. This study presents an experimental investigation of a hybrid Cold Air-Minimum Quantity Lubrication (CA-MQL) strategy for micro-milling multi-directional T700 CFRP laminates. Comparative tests under dry and CA-MQL conditions recorded three-component cutting forces, groove-bottom roughness (Ra), delamination factor (Fs) and tool flank wear. Under the tested conditions (nozzle outlet approximate to - 20 degrees C, nozzle angle approximate to 10-15 degrees, lubricant flow 2 mL/min), CA-MQL reduced tangential and radial forces: Fx decreased by approximate to 15.18% and Fy by approximate to 7.18%, while the axial force Fz showed a modest increase of approximate to 7.2%. Surface integrity improved under CA-MQL: Ra at the groove bottom decreased by approximate to 0.2-0.4 & micro;m (approximate to 18.3-32.7%) and Fs declined by about 15-20% compared with dry cutting. Tool flank wear was also suppressed (approximate to 30-45% reduction), particularly at higher spindle speeds. To the best of our knowledge, this study provides one of the first systematic experimental evaluations of CA-MQL at micro-milling scale for T700 CFRP. It provides quantitative evidence and mechanistic insights to guide precision hybrid cooling-lubrication strategies.
Keywords:
CA-MQL
CFRP
micro-milling
surface quality
tool wear
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