Cryogenic minimum quantity lubrication (Cryogenic MQL) is a kind of green cooling/lubrication technique,which consists of the application of a small amount of lubricant,delievered in a refrigerated compressed gas stream to the cutting zone. Development of cryogenic MQL generator with high performance is the precondition of study and application of cryogenic MQL cutting. Based on the analysis of current status of developing cryogenic MQL generator,composite refrigeration mentod is presented and used to devel...