How to correctly understand the tool life of CNC machining?

In CNC machining, tool life refers to the time that the tool tip cuts the workpiece during the entire process from the beginning of the machining to the tool tip scrapping, or the actual length of the workpiece surface during the cutting process. 1. Can the tool life be improved? The tool life is only 15-20 minutes, can the tool life be further improved? Obviously, tool life can be easily improved, but only on the premise of sacrificing line speed. The lower the line speed, the more obvious the increase in tool life (but too low line speed will cause vibration during processing, which will reduce tool life). 2. Is there any practical significance to improve tool life? In the processing cost of the workpiece, the proportion of the tool cost is very small. The line speed decreases, even if the tool life increases, but the workpiece processing time also increases, the number of workpieces processed by the tool will not necessarily increase, but the cost of workpiece processing will increase. What needs to be understood correctly is that it makes sense to increase the number of workpieces as much as possible while ensuring the tool life as much as possible. 3. Factors affecting tool life 1. Line speed Linear speed has the greatest impact on tool life. If the linear velocity is higher than 20% of the specified linear velocity in the sample, the tool life will be reduced to 1/2 of the original; if it is increased to 50%, the tool life will be only 1/5 of the original. To increase t