面向绿色制造的快速点磨削磨削液供给参数计算

高速／超高速磨削条件下，砂轮边缘的高速空气带会阻碍磨削液注入磨削区。空气带压力与砂轮速度的平方成正比。快速点磨削是一种新型高速／超高速磨削技术，接触区很小，实际磨削功率低，冷却及散热效果好。在分析了高速／超高速磨削砂轮周围旋转空气带动压力及速度分布特点的基础上，根据热力学原理及快速点磨削特点，分析并建立了磨削液的供给流量和供液速度的理论模型。在此基础上，建立了面向绿色制造的快速点磨削的磨削液喷嘴直径及供液压力的工程计算公式。

Calculations of coolant supply parameters in quick-point grinding for green manufacturing

In high and super-high speed grinding process,there is an air flow layer with high speed around the circle edge of the grinding wheel which hinders the grinding fluid from flowing into contact layer,namely,the air barrier effect.The air layer speed is directly proportional to the square of the wheel speed.Quick-point grinding is a new type of high and super-high speed grinding process with a point contact zone and lower grinding power,and the edge effect of the air barrier is weakened because of the thin super abrasives grinding wheel.Through the analysis of the dynamic pressure and velocity distributions in the air layer around the wheel,the mathematic model of the flow rate and jet velocity of the fluid for effective supply in the process were established based on the thermodynamics and the technical characteristics of quick-point grinding process.Furthermore,the formulas to calculate the spray nozzle diameter and jet pressure for green manufacturing were also built up.