The wear rate is slower, the tool life is higher, so the factors that influence the tool wear will affect the durability of cutting tools, and tool life is an important symbol to measure the cutting performance. So we need to analyze factors affecting the tool life, so as to effectively control the relationship between these factors, in order to get a reasonable tool life, the cutting tool has better performance.

Selection method

The first method is based on the principle of minimum single workpiece to develop durability, known as the highest productivity durability of Tp; the second method is based on the principle of minimum cost to make each workpiece durability, known as the lowest cost durability of Tc; the third method is based on the unit of time obtained the biggest profit to make durable is called the maximum profit durability of Tpr.

According to the analysis, the following relationships exist between the three durability factors, that is, the Tp selection factor.

For manufacturing and grinding tool is relatively simple, the cost is not high, such as turning, drilling, durability can be set low point; on the other hand, such as cutter, broach and gear cutting tool durability should be like, is a little higher.

For pocket knife, multi tool machine tool change and adjustable complex, modular machine tool and automatic machining tool, durability should be higher. Machine clip tool change time turning and ceramic cutting tools is short, can choose low durability.

The key to meet the production rhythm, in order to make the workshop production balance, the durability of the process should be low; when sharing one process per unit of time cost is larger, the durability of cutting tools should be low.

In order to avoid changing knives during the process of machining the same surface, the durability should be higher, and at least one knife should be completed

Production line tool durability should be stipulated as one or two classes, so as to be able to change the knife at the end of the shift.