coarse grit meaning in English
粗谷粉
Examples
- The results show that , when increasing the feed rate of the grinding wheel , decreasing the rotating speed of the wafer chuck table and using coarser grit grinding wheel , the material removal rate in the wafer rotating grinding increase , the feed rate of the grinding wheel has greater influence on the material removal rate ; when suitably increasing the rotating speed of the grinding wheel , decreasing the feed rate of the grinding wheel and using finer grit grinding wheel , the wafer surface roughness can be reduced ; there exists a critical rotating speed of the grinding wheel ( about 2300rpm ) , beyond which the material removal rate evidently decreases and the spindle motor current and wafer surface roughness steeply increase ; when the grit size of the grinding wheel is finer than # 2000 , the material removal rate decreases and the wafer surface roughness has no obvious improvement
研究结果表明，增大砂轮轴向进给速度和减小工件转速，采用粗粒度砂轮有利于提高磨削矽片的材料去除率，砂轮轴向进给速度对材料去除率的影响最为显著；适当增大砂轮转速，减小砂轮轴向进给速度，采用细粒度砂轮可以减小磨削表面粗糙度；在其它条件一定的情况下，砂轮速度超过一定值会导致材料去除率减小，主轴电机电流急剧增大，表面粗糙度变差；采用比# 2000粒度更细的砂轮磨削时，材料去除率减小，矽片表面粗糙度没有明显改善。