It only takes 5 minutes to judge the quality of cutting fluid, which can easily save 10% of the cost.
November 08, 2021
How can machinery factories simply judge the performance and quality differences of different cutting fluids? Here is a set of simplest methods to compare the main performance indicators of different cutting fluid products. You only need to spend 5 minutes and you can save at least 10% of the cost.
The longer the tool life and the better the finish of the machined surface, the better the lubrication performance of the cutting fluid. Lubrication performance is a very important indicator of cutting fluid. Directly affect processing quality and cost. But it cannot be judged intuitively, because you cannot know the formula of the cutting fluid and the amount of effective lubricating ingredients. Stability. There are delamination, impurities and unevenness in any of the following two items. It can be judged that the stability of the cutting fluid is poor. ①. Take an appropriate amount of the original solution and place it in a transparent container for 24 hours to observe whether the original solution has stratification and impurities, and whether it is uniform; ②. Take an appropriate amount of the original solution and make a 5% dilution with tap water, and let it stand for 15 minutes in a transparent container . Observe whether the diluent is uniform, whether there are stratification and impurities. The performance of the foam can disappear within 15 seconds through the experiment, and the foam performance is qualified, the faster the better. Prepare 5% concentration diluent and place it in a transparent reagent bottle, and close the lid. Then shake the reagent bottle up and down with normal force for 15 seconds, and then set it aside on the table to start timing and observe: If the bubbles generated in the bottle disappear within 15 seconds, the faster the disappearance, the better. Then the foam performance is qualified.
The longer the anti-rust and anti-corrosion time, the longer the natural anti-rust and anti-corrosion ability. Configure the appropriate amount of 5% concentration diluent, select the machined parts of the proper size (the machined surface has been cut), soak it in the cutting fluid for a proper time (half an hour to several hours. According to the length of the part processing time), take it out and leave it in the air. After 3-5 days of observation, the parts will appear rusty or corroded. In particular, this method can only be used to judge this performance. For some special materials (such as aviation aluminum alloy), strict laboratory verification is often required.
The earlier the antibacterial ability turns into a smelly cutting fluid, the worse its antibacterial ability. Prepare an appropriate amount of 5% concentration diluent and let it stand still in the container to regularly smell the change in the odor of the cutting fluid. This item is directly related to the service life of the cutting fluid. The antibacterial principle of most products is based on the fungicides in the product formulations. Only a very small number of products (such as Blasocut series of Basso) use advanced biological antibacterial methods to effectively solve the potential harm of fungicides to the skin. Observe the change of the dividing line of anti-miscellaneous oil ability: The cutting fluid with weak anti-miscellaneous oil ability will quickly mix with the oil and make the dividing line become more and more blurred. Configure an appropriate amount of 5% concentration diluent and let it stand in a transparent container, and then drop an appropriate amount of hydraulic oil or rail oil into the cutting fluid. Oil will float on the surface of the cutting fluid, and there will be a clear boundary between oil and water. Whether it contains nitrite or not, use a special nitrite test paper to test it. If the test paper turns red, it can be determined that it contains carcinogenic nitrite in 99% of the cases. The deeper the redness, the higher the content. In addition, there is a lack of simple methods for the comparison of cooling performance. However, as long as it is a water-soluble product, the cooling performance is not much different. For fully synthetic grinding fluids, there are also requirements for sedimentation. That is, the ability of grinding debris and metal particles to settle quickly in the grinding fluid. This can be very intuitive to observe the changes in the degree of transparency of the grinding fluid. Products with better sedimentation properties can maintain good transparency for a long time. There are many specific evaluation methods for the performance evaluation of cutting fluid in the laboratory. However, in a general factory, the above simple methods can also be used to obtain a relatively considerable and effective evaluation.
