Abstract
Gear hobbing in cryogenic air with minimal quantity lubricant (MQL) is a better choice to take place of traditional gear hobbing in oily cutting fluid, in which cryogenic air with pulverized vegetable oil place the great amount of mineral cooling oil, to play the role of lubrication, cooling, chip clearance, and rust prevention. By the comparative experiments, differences on cutter wear are explored, among cryogenic gear hobbing with MQL, gear hobbing in oily cutting fluid, and dry gear hobbing. It indicates that the gear hobbing in cryogenic air with minimal quantity lubricant is practical, and not only a great amount of cooling oil is saved to lower cost and environment pollution, but also life-saving of hobbing cutter reduces production cost.
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