The use and maintenance of cutting fluid for aluminum alloy processing

The preparation and use of cutting fluid for aluminum alloy processing is basically the same as that of ordinary cutting fluid, but the selection of dilution water is more stringent. Because many ions in water can corrode aluminum, if the content of these ions is too much, the antirust performance of the cutting fluid will be reduced, especially in the antirust between processes, such as chloride ions, sulfate ions and heavy metal ions. In addition, some ions will react with the aluminum antirust agent in the cutting fluid to reduce the rust resistance and stability of the cutting fluid, such as calcium and magnesium ions. Therefore, try to choose dilution water with less hardness, or dilution water softened by ion exchange, to ensure the use effect and service life of the cutting fluid.

In addition to the daily maintenance of ordinary cutting fluids, the maintenance of cutting fluids for aluminum alloy processing requires attention to the following points, according to Jiahangaero:

1. Filter

Because aluminum alloys are prone to react under alkaline conditions to form aluminum soap, which will damage the stability of the cutting fluid, Jiahangaero said that the cut aluminum shavings should be filtered out immediately to prevent the aluminum chips from reacting with the cutting fluid and affecting the cutting fluid effect and service life. The aluminum shavings that are ground out during the grinding process are small and light, and are difficult to settle. If there is no filtration or insufficient filtration, the aluminum shavings will be brought to the processing area along with the cutting fluid circulation system and scratch the surface of the workpiece. , affecting the glossiness of the machined surface.

2. pH value

Because aluminum is very sensitive to the pH value of the cutting fluid, it is necessary to regularly check the pH value of the aluminum alloy cutting fluid. Jiahangaero said that if any abnormality is found, it should be adjusted in time. Use PH to be controlled at 8 to 9, so as not to corrode the workpiece if the PH value is too high or to cause bacteria to proliferate in large numbers due to a too low PH value, which will affect the stability and performance of the cutting fluid.

3. Regularly add new liquid

It not only ensures the good lubrication of the cutting fluid, but also ensures the good anti-rust performance and anti-bacterial and anti-corrosion performance of the cutting fluid, so as to prolong the service life of the cutting fluid.