Due to the disadvantages of using a large amount of cutting fluid in the traditional machining process,it is easy to cause harm to the environment and human body.Based on the concept of green environmental protection,low-tem-perature Minimum Quantity Lubrication technology is adopted.The surface rounghness detection and metallographic analysis are carried out in the process of milling step surfaces,milling grooves,drilling holes,etc.The influence of different process parameters on the machining quality of 7050 aluminum alloy under low temperature cooling conditions is analyzed and stud-ied.The results show that in the temperature range below-10℃,the surface roughness of the blind hole obtained is fault-less;under the conditions of-60℃～0℃ low-temperature Minimum Quantity Lubrication processing,the machined surface of 7050 aluminum alloy would not be cooling or overheating.At the same low temperature,the surface finish of the inner cooling hole tool is preferable.
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