Why does a yellow film appear on the mechanical surface after using cutting oil for a period of time?
July 14, 2022
Everyone knows that the main quality control indicators of oily cutting oils are viscosity, flash point, pour point, fat content, sulfur content, chlorine content, copper corrosion, moisture, mechanical impurities, etc. Some users and friends will find that the machine has been used for a long time. Oil, there will be a yellow film on the machine. Here, let's analyze it together with you:
Let's talk about the composition of cutting oil, fat, and fat is an oily additive in cutting oil, which is an important indicator for classifying cutting oil. Fat in cutting oil can reduce friction coefficient and reduce tool wear, which is particularly effective in preventing flank wear. Cutting oil with more fat is especially suitable for non-ferrous metal processing and occasions where the cutting amount is not large but the product precision and finish are high (such as fine turning screw). Generally, the saponification value can be used to roughly determine its fat content. If the fat content in the cutting oil is too high or its quality is not good, it is easy to form viscous substances on the machine, which will cause the movement of the machine parts to be inflexible. oil manufacturer. If your machine has such a phenomenon, you should change the cutting oil as soon as possible, or buy a special industrial cleaning agent for cleaning the cutting oil and oil stains of the equipment. Do not let it continue.
