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Grinding process is an important way of machining,and can achieve a perfect surface quality.But it has also a great defect,which little grinding fluid can enter grinding area for air flow layer around the high speed grinding wheel in grinding,and then make a lot of pollution and waste.Near dry cutting(minimum quantity lubricant,MQL) is a green machining way which was put forward,recently.It makes compressed air and lubricant mixed to form mist which spew at the cutting area to keep decreasing friction and lowing temperature.Near dry cutting is a way of cutting between wetting and dry cutting,and can be able to avoid the problem in the traditional processing,and improving utility rate of cutting fluid,realizing green machine.The thesis researches the problems in grinding by the near dry cutting’s soul,i.e.the near dry grinding.First,analyze what is the grinding fluid function mechanism in the cutting area in theory, conclude if it is practicable and can achieve a good effort,and then research how to make the useful grinding fluid into the grinding area,calculate the fluid speed from a nozzle to pierce into the air flow layer around the high speed grinding wheel,analyze and select the grinding fluid supply direction to avoid reversed air flow,and the flow rate is assumed.Second,select some process parameters to compare the difference of output parameters(R_α、microstructure and F) under the conditions of the traditional fluid supply、near dry grinding and dry grind,and draw a conclusion if near dry grinding is practicable. Finally,Based on a orthogonal experiment,analyze how much grinding wheel,grinding depth and feed rate effect on workpiece surface and deduce a prediction equation by regress method.
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