One of the main functions of the metalworking fluid is to provide the parts with rust resistance between processes, which is completed by the rust prevention film left on the metal surface. Therefore, what is to be discussed here is not whether the metalworking fluid leaves residues, but whether the residues are left purposefully. The residue of metalworking fluid on the parts will affect the amount of metalworking fluid taken away, the use function, the filtering condition, the cleanliness of the machine tool and parts, and the replacement of the grinding wheel of the grinder. The residues on the surface of metalworking fluid machine tools may stick iron filings and grinding wheel ashes. When they are stuck by residues, iron filings and grinding wheel ashes will act like scrapers and abrasives, resulting in wear of machine tool seals, guides and sliders, cams and tappets. Therefore, residues shall be removed during machine tool maintenance.
The residue can be observed simply and effectively with the following methods Fill the glass pan with 5ml of cutting fluid concentrate and expose it to ambient temperature for one month or more. Generally speaking, the longer the exposure time in the atmosphere is, the better, so as to see the result that the cutting fluid is oxidized. The cutting fluid with proper formula is antioxidant. This experiment can also be carried out by adding different machine tool oil leakage pollutants and minerals in water at the same time. Some residues must be dissolved with great efforts. A considerable part of the residues are soluble in water or working fluid, and the other part is soluble in solvent. In fact, this residue is the least expected and most difficult to deal with. These classifications may have a certain degree of lopsidedness, but when used for comparison of cutting fluids, they still have a certain reference significance. Through the classification of the residue morphology, we can see that if the residue of processing fluids has had a bad impact on the production process, machine tools, workpieces, etc., it is difficult to fundamentally solve the problem through simple maintenance.
Residues can be minimized by: 1. Select appropriate processing fluid to make its residue acceptable in your application, and its functions in other aspects also meet your requirements 2. Run the processing fluid at the proper concentration. If twice the concentration of the processing fluid you use can meet the minimum concentration required by the work, you will also get twice the residue 3. Try to use high-quality water to mix the processing fluid. "Hard water" is one of the main sources of cations, which can react with the components in the processing fluid to generate water-insoluble residues 4. Remove the residues and metal chips from the liquid tank in time. They may also be the source of cations 5. Regularly use the processing fluid to "wash" the machine tool. Dissolve the residue formed by evaporation of water. This also reduces the amount of replenished processing fluid. In short, regular cleaning can easily keep the machine clean 6. If there are difficult residues on the machine tool. It is very helpful to gently spray or brush soluble surfactant on the surface of the machine tool to make it penetrate into the residue before cleaning.
