Abstract
The nano-fluid added with nano-particles in the easily degradable vegetable oil base ensures that the contact angle of the aluminum alloy 7075 under the vegetable oil base is slightly improved, and the lubrication performance is further strengthened, the cutting force is reduced, the surface quality is improved, and the roughness is reduced. When milling the aluminum alloy 7075, the lubrication performance effect of the nano-fluid is evaluated. Taking aviation aluminum 7075 as workpiece. The contact angle, cutting force, surface roughness and SEM appearance of the workpiece were evaluated under four lubrication conditions: dry processing, emulsion pouring, micro lubrication of cottonseed oil and cottonseed oil-based + 0.5% Al2O3 nano-particles. The experimental results show that the contact angle of nano-fluid to aluminum alloy 7075 is slightly larger than that of vegetable oil, but with the addition of nano-particles, the chips roll from sliding, making the surface morphology of the machined surface good, the cutting force minimum, the roughness minimum, indicating that the nano-fluid lubrication and antifriction performance is good.
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