Cutting Machine Die Loss and Service Life

1, First wear stage
The first wear process of the cutting die of the cutting machine is faster and the time is shorter. The surface sharpness of a new sharpening tool is more prominent. In the process of friction with the chip, the pressure is uneven and the pressure at the peak point is very large. As a result, the peak is quickly worn, the pressure tends to be even and the wear rate is slowed down.

2, The normal wear stage
The surface of the cutting die of the cutting machine was initially worn, the peak point was originally ground, the surface pressure became uniform, and the wear amount of the tool was VB.
Increased with time. The wear curve at this stage is basically linear, and its slope represents the wear strength, which is an important indicator of the tool performance.

3, Sharp wear stages
After the cutting die of cutting machine has passed the normal wear stage, the cutting edge has become blunt, the cutting force, cutting temperature rises sharply, the wear causes a qualitative change, the surface of the tool fatigues, the performance decreases, the wear volume VB increases sharply, and the tool will soon Failure.