CNC cutting fluid centralized supply and return reuse

The centralized cutting fluid supply system is widely used in many machine tool factories or large machine tool production workshops. Due to the large number of liquid supply points and high liquid supply volume per unit time, it increases the complexity of management and manual operation. In addition, with a large number of machine tools, it is also inconvenient to replace waste cutting fluid. However, the centralized supply system enables factories to better manage and maintain cutting fluid. The cutting fluid is concentrated in a large storage tank, and the bacteria count, concentration, pH value, etc. of the working fluid are monitored online. Based on the inspection results, the concentration is stabilized regularly, which is convenient for controlling and ensuring the quality of the working fluid, and makes the management and maintenance of the supply system specialized.

Centralized cutting fluid filtration is a processing auxiliary fluid, suitable for cooling and lubricating the tools and workpieces during the cutting, milling and grinding of metal materials. It has excellent functions of cooling, lubrication, rust prevention, degreasing, cleaning and corrosion prevention. Cutting fluid is divided into oil-based cutting fluid and water-based cutting fluid. According to surveys, the current demand for oil-based cutting fluid is relatively low, and water-based cutting fluid is the main type in use. During the entire use of water-based cutting fluid, the lubricating oil on the workpiece and a large amount of machine tool guide rail oil mix with the cutting fluid. Thus, the cutting fluid mixed with various impurities and residues flows back into the cutting fluid tank through circulation. The long-term circulation and idle use of the cutting fluid cause a large amount of mixed oil to suspend on the surface of the cutting fluid, preventing the cutting fluid from contacting the air, which leads to the growth of a large number of bacteria in the cutting fluid. This not only greatly increases tool damage, but also reduces the precision of the workpiece surface, interferes with the working environment that is beneficial to workers' physical and mental health, and causes environmental pollution problems such as air pollution, water resource pollution, and land pollution. Therefore, it is necessary to purify and treat the cutting waste fluid to extend the service life of the cutting fluid.

In the grinding section of the electrode workshop, the cutting fluid of each grinding machine usually adopts a single circulation. After using the cutting fluid for a period of time, there are abrasive grains from the grinding wheel and metal tungsten particles in the fluid. When polishing the workpiece surface, these particles will cause defects and interfere with the surface quality. At the same time, the cutting fluid must be removed and replaced in time. The rough grinding fluid is removed and replaced every 5 days, and the fine grinding fluid is removed and replaced every 3 days. This leads to high production costs and environmental pollution. Therefore, large and medium-sized processing plants strongly recommend adopting the centralized filtration method. The centralized filtration system is the development trend of modern wet processing filtration.

Compared with the single-machine circulation system, the advantages of centralized filtration are mainly reflected in the following aspects:

1. The precision of centralized cutting fluid filtration is very easy to operate.

2. It is very easy to achieve automatic control. It occupies a small area; the area of large and medium-sized centralized filtration systems is much smaller than that of single-machine filtration systems.

3. It is convenient to manage: when adding cutting fluid, the number of points is small, which can reduce the number of cutting fluid managers; waste cutting fluid is treated centrally, reducing environmental pollution; the discharged iron filings are concentrated, which is convenient for transportation and treatment; the application of cutting fluid can conduct intensive testing.

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