Machinability and Surface Quality During Milling CFRP Laminates Under Dry and Supercritical CO2-Based Cryogenic Conditions

Carbon fiber-reinforced polymer (CFRP) composites have been widely used in the aerospace industry due to their excellent mechanical properties. CFRP machining is still a challenging task for manufacturers due to its high temperature-sensitivity and poor machinability. Cryogenic machining is believed...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing-green technology 2022-05, Vol.9 (3), p.765-781
Main Authors: Zou, Fan, Zhong, Bingfu, Zhang, Heng, An, Qinglong, Chen, Ming
Format: Article
Language:English
Subjects:
Aerospace industry
Carbon dioxide
Carbon fiber reinforced plastics
Composite materials
Cooling
Cryogenic cooling
Cutting force
Cutting parameters
Cutting speed
Cutting tools
Feed rate
Fiber composites
Fiber reinforced polymers
Hardness tests
Heat conductivity
High temperature
Laminates
Machinability
Material properties
Mechanical properties
Microhardness
Milling (machining)
Physical properties
Polymers
Surface properties
Temperature
Tensile strength
Tribology
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Summary:Carbon fiber-reinforced polymer (CFRP) composites have been widely used in the aerospace industry due to their excellent mechanical properties. CFRP machining is still a challenging task for manufacturers due to its high temperature-sensitivity and poor machinability. Cryogenic machining is believed to be an effective and eco-friendly way to solve the aforementioned problem. This work primarily compared the machinability and machined surface quality of CFRP laminates under dry and supercritical CO2 (scCO2)-based cryogenic conditions. A series of tests were carried out under different cutting conditions, in which the feed rate, cutting speed, and cooling method were considered. To reveal the material removal mechanisms under different cooling conditions, the tribology and micro-hardness tests were innovatively carried out under different temperatures. The obtained results show that the scCO2-based cooling method is suitable for machining CFRP materials. Under cryogenic cutting conditions, the machined surface quality is considerably improved despite that the cutting force presents higher magnitudes compared to those under dry cutting. The improvement of surface quality under cryogenic cooling method is attributed to avoidance the degradation of material properties caused by high temperatures during dry cutting.
ISSN:2288-6206
2198-0810
DOI:10.1007/s40684-021-00386-9