CNC machining of aluminum alloy

The selection of cutting fluid for CNC machining of aluminum alloy has these important introductions!
Compared with most steel and cast iron materials, aluminum has many significant physical properties: strength and hardness are much higher than pure aluminum, but lower than steel, cutting force is smaller, and thermal conductivity is good.
Due to the soft processing quality, strong plasticity, and easy adhesion of aluminum alloy CNC cutting tools, BUEs may form on the cutting edge. During high-speed cutting, fusion may occur on the cutting edge, causing the tool to lose cutting ability, affecting machining accuracy and surface roughness. In addition, aluminum has a high coefficient of thermal expansion, and cutting heat can easily cause thermal deformation of the workpiece, reducing machining accuracy.
In summary, the selection of cutting fluid for aluminum alloy CNC machining is very important, and it is necessary to ensure good lubrication, cooling, filtration, and rust prevention performance. Therefore, the cutting fluid for aluminum CNC machining is different from ordinary cutting fluids, and selecting a suitable cutting fluid is crucial.
According to the CNC machining conditions and accuracy requirements of aluminum alloy, different cutting fluids should be selected. Due to the large amount of heat generated by high-speed CNC machining, such as high-speed cutting and drilling, if the heat generated cannot be taken away in time, tool sticking phenomenon may occur, and even BUE may occur, seriously affecting the machining roughness and tool life of the workpiece, as well as causing thermal deformation of the workpiece, seriously affecting the accuracy of the workpiece. Therefore, the selection of cutting fluid needs to consider its own lubrication and cooling performance.
For grinding, the debris is very small and generates a large amount of heat during the grinding process. It is necessary to consider both the lubrication and cooling performance of the cutting fluid and the filtration of the cutting fluid. If the viscosity of the selected cutting fluid is too high, the chips cannot be deposited or filtered out, and it will scratch the surface of the workpiece processing area with the circulation of the coolant, thereby affecting the processing smoothness of the surface. Therefore, ultra-fine grinding is chosen for grinding or low viscosity grinding oil or semi synthetic cutting fluid grinding to reduce wear.
When selecting cutting fluid, in addition to considering the lubrication and cooling properties of the cutting fluid, it is also necessary to consider the corrosion resistance, cost, and ease of maintenance of the cutting fluid. Cutting oil is easy to choose base oil anti friction additives with relatively low viscosity, which can achieve lubrication friction, good cooling and easy filtration. However, cutting oil has problems such as low flash point, high smoke emission during high-speed cutting, high risk factor, fast volatilization, and correspondingly high user costs. Therefore, when conditions permit, water-soluble cutting fluid should be used as much as possible.