Emulsified cutting fluids are widely used in the machining industry, especially in CNC machining because of their high cost performance. The imported emulsion cutting fluid has good stability, but it is expensive, so the use is limited, and most of the companies use domestic emulsion. However, every hot summer, the temperature continues to rise, the domestic emulsified cutting fluid is particularly prone to deterioration, black color, accompanied by odor, seriously affecting the image of processing companies. Moreover, long-term inhalation of odor can cause serious damage to the processing operator's body and is corrosive to automated CNC equipment. If you add the original liquid or completely replace the new emulsified cutting fluid, use it for a period of time or if the CNC equipment is not used for a few nights, the emulsified cutting fluid will quickly deteriorate and smell, the effect is not significant, and the funds are wasted.
Metal processing online (mw1950.com) reader Feng Weitao's workshop is CNC precision machining, the equipment maintenance requirements are very strict, the workshop environment is good, with air conditioning. But every summer, the emulsified cutting fluid used in CNC equipment quickly changed from milky white to taupe and stinky. We have tried many solutions, such as buying a cutting fluid concentration meter (controlling the concentration of cutting fluid), buying a special fungicide (killing cutting fluid bacteria), etc., but the effect is not obvious.
1. The main cause of deterioration of emulsified cutting fluid
The emulsified cutting fluid contains a large amount of bacteria, and the bacteria in the cutting fluid mainly include oxygen-consuming bacteria and anaerobic bacteria. Oxygen-consuming bacteria live in a mineral environment, such as water, concentrated liquid of cutting fluid and oil leaked from CNC machine tools. Under aerobic conditions, they are metabolized every 20 to 30 minutes, and only oxygen is consumed without odor. The anaerobic bacteria survive in the absence of oxygen, and the metabolism releases SO2, which has a rotten egg flavor and the cutting fluid turns black. When the bacteria in the cutting fluid is greater than 106, the cutting fluid will smell. The cutting fluid storage tank of our company's numerical control equipment is a closed space. When the cutting fluid stops flowing, the oxygen-consuming bacteria will cause serious oxygen deficiency in the cutting fluid, forming an environment conducive to the breeding of anaerobic bacteria, prompting the cutting fluid to be fast. Deterioration and stinky.
When the machine tool leaks in the machine tool during use, the oil enters the cutting fluid, which forms a layer of floating oil on the surface of the cutting fluid. It blocks the contact between the cutting fluid and the air, and also causes hypoxia, which causes the anaerobic bacteria to rapidly multiply and accelerate. The spoilage of the cutting fluid deteriorates. However, today's CNC machine tools are already equipped with a cutting fluid filter, which causes the deterioration of the cutting fluid to occur rarely.
2. The way bacteria enter the cutting fluid
1 There is bacteria in the water in which the cutting fluid is prepared. 2 The cutting fluid is in contact with bacteria in the air during the use cycle. 3 Dust and bacteria on the workpiece during processing. 4 The bad habits of the processing personnel, such as littering cigarettes, cotton yarn, etc., enter the cutting fluid. 5 The bacteria in the oil leakage of the machine parts enter the cutting fluid.
3. An effective method to prevent deterioration of emulsified cutting fluid
The method is to add oxygen to the cutting fluid storage tank or add flowing air...
For more details, please click on the metal processing online link: an effective way to prevent emulsified cutting fluid deterioration >>
Military Waterproof Case,Equipment Box,Protective Housing
Keyli Magnetic Material Co., Ltd. , http://www.cxmagnet.com