Metal cutting lubrication chooses trace lubrication
At present, metal cutting processing includes cutting oil pouring lubrication processing, dry cutting processing, micro lubrication processing, low temperature micro lubrication processing and other forms. Traditional cutting oil lubrication brings great pollution to the operating environment and consumes a lot of energy. Dry cutting has relatively high requirements on the performance of machine tools and cutting tools, and the cost of cutting tools is relatively high.
Minimal lubrication avoids environmental problems caused by a large amount of cutting oil and subsequent cleaning of workpieces. At the same time, it can obtain better machining accuracy and surface quality, which can not only ensure high machining efficiency, but also increase the service life of cutting tools and reduce Energy consumption, only 10-50ml of lubricating oil per hour is needed to provide lubrication to the cutting tools.
Compared with cutting oil pouring lubrication processing, the temperature of micro lubrication processing is higher. High-speed machining under minimal lubrication conditions ensures the long life of cutting tools, mainly because ultra-fine oil mist particles are conducive to penetrating into the cutting area to form an oil film, reducing the friction between “cutting tool-workpiece” and “cutting tool-chips” , It plays the role of restraining temperature rise, reducing wear, preventing adhesion and improving the quality of workpiece surface and cutting tool life. The oil mist type micro-lubrication machining cutting tool is always maintained in a stable cutting temperature range, and there will be no repeated thermal shock when the cutting oil is used, causing the cutting tool to form micro cracks and gradually expand, leading to chipping and peeling of the coating. Other phenomena affect the life of the tool.
For some special metal materials, such as titanium alloys, high-hardness materials and high-temperature alloys, the use of low-temperature trace lubrication has a better effect. At present, the low-temperature gas mainly includes nitrogen, carbon dioxide, and low-temperature cold air. When the low-temperature gas and a very small amount of lubricating oil are sprayed into the processing area, it not only solves the lubrication problem but also solves the cooling problem of the cutting process, and has a very good market prospect.
The advantages of micro lubrication are as follows:
(1) The oil mist can penetrate into the friction point, play a good lubrication effect and inhibit temperature rise;
(2) Compressed air can take away the cutting heat, and a large amount of cutting heat is taken away with the chips.
(3) The fuel consumption is low, and the cutting friction points always maintain an appropriate amount of reliable lubrication;
(4) The product is small in size and low in gas source consumption.
easy to use;
(5) Reduce the maintenance cost and operating cost of the machine tool;
As the impact of cutting fluids on the environment is becoming more and more significant, the requirements for energy conservation and environmental protection are increasing day by day. It is especially important to choose a suitable lubrication method. Minimal lubrication can help companies reduce operating costs.
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