How to avoid water-based cutting fluid corrosion machine tool?

After using the five-axis numerical control machining center, the factory workshop continued the previous management methods and application understanding of cutting fluids, ignoring the application requirements of numerical control machine tools for water-based cutting fluids. At the same time, the state of cutting fluids in the use of equipment lacks useful detection and maintenance methods, resulting in the use of five-axis numerical control machining centers for a period of time, and many machining centers have successively shown shortcomings. After the manufacturer's maintenance, it was found that the electrical pipeline and built-in system of the machine tool spindle showed serious corrosion caused by the cutting fluid, forming an invisible shortcoming of the electrical system of the equipment, and the shortcoming shutdown has seriously affected the normal consumption and entrustment. The processed workpiece belongs to a large casting part, with many impurities in the inner cavity and rust on the surface. After the workpiece has been scribed and ordinary milling machine processes, it is transferred to a five-axis machining process. Because in the five-axis machining process, the cutting fluid not only plays the main role of smoothing and cooling, but also brings a lot of impurities such as rust, sand, chips to the machine tool everywhere. It is assumed that rust or chips meet in the dead angle inside the machine tool. It may not be washed out, and it will stick to the machine tool parts, causing the cutting fluid or water vapor to condense in the rust or chips and the machine tool for a long time, the machine tool parts will gradually be rusted, and even the entire machine tool will show rust problem.

Regarding the reason why moisture is mixed into the cutting fluid, the main reason is that the previous process is water-based cutting fluid, and the water is brought in by the workpiece, or when the machine tool that has used the water-based cutting fluid is replaced by the oil-based cutting fluid, there is moisture in the liquid tank and the pipeline. In order to remove the moisture attached to the workpiece and the machine tool, it is necessary to use the anti-rust oil and cleaning oil with water replacement to stop disposal. In particular, some additives in the cutting fluid will differentiate when lubricated by water, resulting in corrosive substances, which will rust the machine tool and the workpiece, and some additives will become thin substances in contact with water, which will block the filter and affect the normal use of the cutting fluid. After the cutting fluid contains water, its lubricating function is also greatly reduced, so that the tool is not afraid of shortening the cost. The oil-based cutting fluid mixed with a small amount of water can be heated and transpirited, then adsorbed and filtered with activated clay, and can be used from scratch.

 In the management of oil-based cutting fluid, special attention should be paid to the mixing of oil leakage. Because the oil-based cutting fluid and the hydraulic oil and lubricating oil of the machine tool are both mineral oil, it is impossible to tell whether there is oil leakage mixing only from the appearance. The concentration of additives contained in hydraulic oil and ordinary lubricating oil is lower than that of oil-based cutting fluid. If a lot of lubricating oil is mixed into the oil-based cutting fluid, the concentration of the additives will decrease, resulting in a decrease in cutting function and a shortening of tool consumption. If the amount of ordinary mixed oil exceeds the quantity fraction by 30%, the function of the oil-based cutting fluid will be significantly reduced. At this time, it is necessary to compensate for additives or use the oil downgrade.