陶瓷CBN砂轮磨削镍基铸造高温合金K418磨削力研究

Investigation on the Grinding Force of the Casted Nickel-based Superalloy K418 with a Vitrified CBN Wheel

系统开展了陶瓷结合剂CBN砂轮磨削K418的试验研究,测试了不同砂轮线速度、工件进给速度及切深条件下的磨削力。通过对试验数据的分析处理,得到上述3个工艺参数对磨削力、力比及磨削比能的影响规律。并拟合出了陶瓷结合剂CBN砂轮磨削基铸造高温合金K418时磨削力的经验公式,该公式估算误差低于10%。磨削力和力比均随着工件进给速度、切深和当量磨削厚度的增大而增大,随砂轮线速度的减小而增大。随着当量磨削厚度的不断增加,磨削比能呈下降趋势。

The grinding experiments are carried out by using the vitrified cubic boron nitride（ CBN） wheels on the casted nickel-based superalloy K418. The grinding forces are measured on the various process parameters, including the wheel speed,workpiece speed and depth of cut,and the influencing law of process parameters on the grinding force,force ratio and specific energy are studied in details. The grinding force and force ratio increase with the increasing of workpiece speed,depth of cut and equivalent grinding chip thickness,and with the decreasing of wheel speed. The specific energy decreases with the increasing of equivalent grinding chip thickness. The experience formula of the grinding force with a vitrified CBN wheels is obtained and the relative error is less than 10%.