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Metal cutting is an important part of industrial activities, which was used in the production process long ago. Metal cutting process is the use of cutting tools to remove excess material from the surface of the workpiece to form parts with certain dimensional accuracy, shape accuracy and surface quality. Therefore, the quality of metal cutting directly determines whether the parts are qualified or not. In the process of metal cutting, many contents are involved, such as chip formation and deformation, cutting force, cutting heat and cutting temperature, wear mechanism and service life of cutting tools, vibration in the cutting process and surface quality of machined parts. These contents affect the quality of workpiece and processing cost in all aspects. Nowadays, with the development of material industry, cutting tools adapted to various new materials are emerging. Therefore, on the premise of ensuring the cutting performance, it is very important to reduce the cost of metal cutting and improve the cutting environment. In traditional metal cutting, a large number of lubricating coolants such as cutting oil and cutting fluid are used. These lubricating coolants play a very important role in metal cutting. On the one hand, they reduce the wear of cutting tools, on the other hand, they take away a lot of cutting heat and protect cutting tools and workpieces. However, the harm caused by the extensive use of lubricating coolant has become increasingly prominent, such as high production costs, poor environment, high waste liquid treatment costs, occupational diseases caused by operators and so on.

 

 

 

The application of MQL in metal cutting is a new way of lubrication and cooling. It can not only reduce the processing cost and improve the processing efficiency, but also be suitable for the processing of a variety of new materials. Because the application environment of MQL technology has been improved. The essence of MQL machining is that there is always a thin oil film between the cutting tool and the workpiece, which reduces the friction between the cutting tool and the workpiece and reduces the wear of the cutting tool. The main significance of MQL in metal cutting is as follows:

 

1. Reduce the cost of machine tools to reduce the purchase cost;

 

2. It does not need to use a lot of cooling and lubricating fluid, which can further reduce the processing cost;

 

3. The power of MQL is compressed air, and its energy consumption is far less than that of cutting fluid circulation system;

 

4. The processing environment can be improved obviously;

 

5. Processing efficiency can become higher;

 

6. Occupational hazards can be eliminated.