The correct application of grinding fluid is very important for successful grinding. The function of grinding fluid is to cool and lubricate the cutting arc area. The function of water-based grinding fluid is mainly to cool and also to lubricate. The cooling oil is mainly used for lubrication and has a little cooling effect. The water-based grinding fluid with full synthetic additives is most suitable for sharp and powerful grinding wheels. This kind of grinding wheel usually has a long cutting arc when working, and needs better scouring effect.
Semi synthetic additive grinding fluid is most suitable for grinding complex shapes and requiring good lubrication performance to prevent burns. Pure oil is suitable for grinding complex shapes, short cutting arc and high requirements for grinding finish. The ethylene glycol based grinding fluid is suitable for the occasions where cubic boron nitride grinding wheel is used and pure oil should be avoided.
Choosing grinding fluid is a difficult task: both the initial price of grinding fluid and the cost of its management and treatment should be considered. The so-called environment-friendly "green" coolant is just a deception. Some barreled fresh coolant can even be drunk, but once the grinding debris pollutes the liquid, it will become a waste harmful to the environment. Once the grinding fluid is selected, it should be filtered and maintained. It is not only necessary to consider its cleanliness, but also to control its concentration, conductivity and PH value.
The latest experiment of grinding fluid shows that the influence of grinding fluid concentration on grinding process is not linear. For a long time, it has been believed that the grinding process will be improved proportionally with the increase of grinding fluid concentration, which is incorrect in fact. For example, when the concentration of grinding fluid is 7.5%~8%, its performance is not as good as that of 5%, but when the concentration is increased to 10%~12%, its performance is improved.
The test results of 50 kinds of water-based grinding fluids are similar with little difference. However, in some cases, the trend is not obvious; In other cases, the concentration of 7.5% grinding fluid is almost enough to cause the machine tool to stall; The grinding fluid with concentration of 5% and 10% works well.
Post time: Feb-06-2023