Information Center

Why does cutting fluid produce foam when it is used? How to solve this problem? The main causes of foam:
The liquid level of the cutting fluid is too low, the flow rate of the cutting fluid is too fast, the bubbles do not have time to overflow, and the more they accumulate, resulting in a large amount of foam; the right angle in the sink design is too much, or the nozzle angle of the cutting fluid is too straight.

Ways to avoid foam:
In the centralized cooling system, the pipeline is connected in stages, and the pressure of the pipeline near the cooling tank should be lower to ensure that the liquid level of the cutting fluid is not too low, and the liquid level should be checked in time and the cutting fluid should be added in time. At the same time, control the cutting fluid flow rate is not too fast. When designing the sink, you should pay attention to the right angle of the sink not too much, and when using cutting fluid, you should also pay attention to the cutting fluid nozzle angle not too straight.

2 What are the precautions for the use of water-based cutting fluids?
Before using the cutting fluid, the oil tank of the machine and equipment should be rinsed with clean water and disinfected to extend the service life of the cutting fluid. If the equipment used to use oily cutting oil and then switch to water-based, the old cutting oil must be cleaned up before use. If the old oil is not cleaned up, the service life of the water-based cutting fluid will be shortened. In severe cases, it will also lead to smelly and other consequences.

The addition method of water-based cutting fluid: add water first and then add oil in the order. The initial use concentration of cutting fluid is better, which can be between 5 and 8%. If it is used in the central circulating cooling system, 1% disinfectant can be added. The concentration of cutting fluid should be kept above 5%, and some fresh cutting fluid should be added to the oil tank every 3 days to make the concentration reach 5%.
If the oil tank of the water-based cutting fluid has slick oil, or if the guide rail oil falls, it is best to use the oil remover to remove the slick oil.

According to the amount of processing and the use of working fluid, the cutting fluid should be replaced regularly. For example, CNC machine tools generally need to be replaced in one month. When replacing the cutting fluid, the most important thing is to rinse the oil tank with clean water.

Why does cutting fluid deteriorate and stink? How to avoid this situation?
The main reason for the deterioration of the cutting fluid is that the cutting fluid contains a large number of bacteria.

Bacteria in cutting fluid are divided into two categories: oxygen-consuming bacteria and anaerobic bacteria
Oxygen-consuming bacteria live in a mineral environment, such as water, cutting fluid concentrate and machine tool leakage of oil, under aerobic conditions, every 20~30min can be split once;

Anaerobic bacteria live in an environment without oxygen, and divide about once every hour. Metabolism releases SO2 with rotten egg smell, and the cutting fluid turns black. When the bacteria in the cutting fluid is greater than a certain value, the cutting fluid will become stinky.

1. Bacteria enter the cutting fluid mainly through the following channels:
1) There is bacterial invasion during the configuration process, such as bacteria in the water in which the cutting fluid is configured.
2) Bacteria in the air enter the cutting fluid.
3) the transfer between the working procedures caused by the pollution of cutting fluid.
4) the operator's bad habits, such as littering dirty things.
5) poor cleanliness of machine tools and workshops.

2. The methods of controlling bacterial growth are:
1) Use high-quality and stable cutting fluid.
2) The concentrated liquid configured with pure water is not only easy to configure, but also improves the lubricity of the cutting fluid, reduces the amount taken away by the chips, and can prevent bacterial erosion.
3) When using, it is necessary to control the ratio of the concentrated liquid in the cutting fluid not to be too low, otherwise it is easy to grow bacteria.
4) Because the oil used in the machine tool contains bacteria, all the oil leaked from the machine tool should be reduced as much as possible to mix with the cutting fluid.
5) When the PH value of the cutting fluid is between 8.3 and 9.2, it is difficult for bacteria to survive, so new cutting fluid should be added in time to increase the PH value.
6) Keep the cutting fluid clean, do not make the cutting fluid contact with oil, food, tobacco and other dirt.
7) regular use of fungicides.
8) Keep the workshop and machine tools clean.
9) If the equipment does not have a filtering device, the floating oil should be skimmed regularly to remove the dirt.
4 What is the cause of cutting fluid pollution? How to clean the cutting fluid?
1. The substances that pollute the cutting fluid are mainly metal powder, gravel fine powder, floating oil, free water, microorganisms and propagation, especially the fungus of Mucor.
The solid powder contained in the cutting fluid comes from the processed parts and tools. Such substances are not only easy to block the pipeline but also may cause great harm: the particles suspended in the cooling fluid damage the seal of the pump, increase the wear of the tools, damage the skin of people and affect the processing quality; The solid precipitates at the bottom of the oil tank and coalesces with organic matters to form a sediment layer with a large number of pores, providing strong conditions for microbial reproduction, the filaments of the mold stabilize the precipitated solids more. The metal powder in the cutting fluid has a high chemical activity, which can make some components in the cutting fluid ineffective. Bacteria contamination makes the cutting fluid rancidity and decomposition, and the reproduction of mold produces viscous substances, resulting in clogging of pipes and nozzles.
2. can be selectedIndustrial cleaning agentCleaning cutting fluid, the cleaning agent of RuiSiBo chemical has a good cleaning and cleaning function for cutting fluid.