1, tool wear, wear volume size, the most direct way is to listen to the sound judgment, if the sound is very heavy cutting or piercing scream, indicating the status of the tool is not working properly, then you can make a brief analysis, if you exclude the tool itself quality problems, the tool clamping problem, knife parameters of the problem, and you should be able to determine the tool wear, the need to suspend processing tool change.         2, through the state of motion processing machine to determine the tool wear, if the processing parameters, such as cutting the amount set are reasonable, large machining vibration machine, issued a "buzz", then you can achieve a sharp tool to determine the state of wear , the tool needs to be replaced. Differences blade       The first fact to be determined is used blades have great differences. In our sample, there are 638 kinds of different blades to maintain six CNC lathe operation. The good news is each of the blades are each category winner. However, the use of 638 kinds of blades 10 pack packaging, meant to inventory 6,380 blades. And all of these are just to maintain six lathe operation. The fact that a relatively small number of cutting edges of each blade. In many workshops, car blade is still a triangle or diamond. The possibility of cutting the number of optimal combination (triangle blade) blade and cutting edge strength (diamond blade) convex triangular blade provides many apparently do not have enough awareness workshop.