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判断钻头使用寿命的标准有如下几项: 1、加工精度:孔的扩大量、孔的直线性、表面光洁度、孔的椭圆度等是否超过临界值。2、切削状态:切屑排出是否顺利;有无振动或发出吱吱叫声等。3、磨损情况:切削刃各部的磨损量是否超过临界值和切削刃有无退火现象。4、切削力:转矩、轴向力、功率等是否超过临界值。上述1、2项最重要,且是最实际的标
The criteria for determining the service life of a drill bit are as follows: 1. Processing accuracy: The amount of expansion of the hole, the straightness of the hole, the surface finish, the ovality of the hole, and the like exceed the critical value. 2, cutting state: Chip discharge is smooth; with or without vibration or squeaky. 3, wear and tear: the cutting edge of the wear and tear of each part is greater than the critical value and whether the edge of the annealing phenomenon. 4, cutting force: torque, axial force, power, etc. is more than the critical value. The above 1,2 items the most important, and is the most practical standard