At present, there are mainly two development approaches for the technological development of high-efficiency cooling tools. One is to use high-pressure cooling and lubrication, and the other is to use cold air for cooling, that is, liquid nitrogen (-196°C) or liquid carbon dioxide (CO2) (-65°C) for cooling, especially liquid nitrogen, which is very useful for cooling milling cutters. It is a promising cooling method (Figure 1).
It should be pointed out that the cutting assisted by nitrogen cooling or carbon dioxide cooling is a kind of dry processing. This dry cooling can not only cool the tool, help rapid chip breaking and prolong tool life, but also has many advantages of dry cutting. Economic, technical and ecological benefits. Figure 2.
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Considering the good cooling effect of high-pressure cooling, and the fact that existing machining centers and turning centers are equipped with cooling and lubrication equipment, many tool manufacturers can provide tools for this high-pressure cooling, and have accumulated a lot of practical experience (whether it is turning or milling), therefore, the use of high-pressure cooling lubricant through the spindle is undoubtedly a first choice.
