Due to the outstanding physical and mechanical properties of aluminum alloy, its application is more and more extensive, especially in the field of transportation, aviation and motor vehicle manufacturing. Aluminum processing, processing aluminum ingots into materials by plastic processing methods, the main methods are rolling, extrusion, stretching and forging. Aluminum processing began to be industrially produced in the early 20th century. Before the 1930s, copper processing equipment was basically used, and the products were mainly used in aircraft manufacturing. The following editor will introduce to you the content of the selection of cutting fluid for aluminum alloy processing and the technical requirements of processing, welcome to read!
 
Selection of cutting fluid for aluminum alloy machining:
 
The selection of cutting fluid for aluminum alloy machining is very important, and good lubricity, cooling, filtration and rust resistance must be ensured. Therefore, the cutting fluid used for aluminum alloy machining is different from ordinary cutting fluids. Choose a suitable cutting fluid Liquid is very necessary.
 
According to the different requirements of processing conditions and processing accuracy, different cutting fluids should be selected. Since high-speed machining can generate a lot of heat, such as high-speed cutting, drilling, etc., if the heat generated cannot be taken away by the cutting fluid in time, the phenomenon of sticking will occur, and even built-up edge will occur, which will seriously affect the workpiece. Machining roughness and tool life, and heat will also deform the workpiece, which seriously affects the accuracy of the workpiece. Therefore, the choice of cutting fluid should consider not only its own lubricity, but also its cooling performance.
 
For the grinding process, the grinding debris is very small, and a lot of heat is generated during the grinding process. Therefore, when choosing a cutting fluid, not only the lubrication and cooling properties, but also the filterability of the cutting fluid should be considered. If the viscosity of the selected cutting fluid is too large, and the chips cannot be deposited or filtered out in time, the surface of the workpiece will be scratched as the cutting fluid circulates to the processing area, thereby affecting the finish of the machined surface. Therefore, low-viscosity anti-friction grinding oil or semi-synthetic anti-friction cutting fluid should be used for fine grinding or super fine grinding.
 
In the selection of cutting fluid, in addition to the lubricity and cooling properties of the cutting fluid, the rust resistance, cost and easy maintenance of the cutting fluid should also be considered. It is easy to use a base oil with relatively low viscosity to add friction reducing additives to the cutting oil, which can not only achieve lubrication and friction reduction, but also have good cooling and easy filterability. However, the problem of cutting oil is that the flash point is low, the smoke is heavy during high-speed cutting, the risk factor is high, and the volatilization is fast, and the user's cost of use is correspondingly higher. Therefore, when conditions permit, try to use water-soluble cutting fluids.
 
For water-based cutting fluids, it is more important to consider its rust resistance. The commonly used water-based aluminum rust inhibitors are silicates and phosphates. For workpieces that are stored for a long time between processes, it is easy to use cutting fluids with phosphate-based rust inhibitors during processing, because silicon-based substances are long compared to aluminum. Corrosion occurs with time exposure to produce black "silicon spots". The pH value of the cutting fluid should be kept at 8-10. If the rust resistance is not good, the aluminum material will be easily corroded under this alkaline condition. Therefore, the water-soluble cutting fluid must have good aluminum rust resistance.