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Tool life is closely related to cutting volume. When formulating cutting parameters, the reasonable tool life should be selected first, and the reasonable tool life should be determined according to the optimization goal. Generally divided into the highest productivity tool life and the lowest cost tool life, cnc machining services，the former is determined according to the goal of the least single-piece man-hours, and the latter is determined according to the goal of the lowest process cost.


When choosing tool life, consider the following points to choose according to the complexity of the tool, manufacturing and grinding costs. The life of complex and high-precision tools should be higher than that of single-edged tools. For machine-clamped indexable tools, due to the short tool change time, in order to give full play to its cutting performance and improve production efficiency, the tool life can be selected to be lower, generally 15-30min. For multi-tool machine tools, modular machine tools, and automated machining tools that are more complicated in tool installation, tool change, and tool adjustment, the tool life should be selected to be higher, especially to ensure the reliability of the tool.


When the productivity of a certain process in the workshop restricts the increase in the productivity of the entire workshop, the tool life of the process should be selected lower. When the cost of the whole plant per unit time of a certain process is relatively large, the tool life should also be selected Lower.


When finishing large parts, in order to ensure that at least one pass is completed and to avoid changing the tool in the middle of cutting, the tool life should be determined according to the accuracy of the part and the surface roughness. Compared with ordinary machine tool processing methods, CNC machining puts forward higher requirements on cutting tools. It not only requires good quality and high precision, but also requires dimensional stability, high durability, and easy installation and adjustment. Meet the high efficiency requirements of CNC machine tools. The selected tools on CNC machine tools often use tool materials suitable for high-speed cutting (such as high-speed steel, ultra-fine-grained cemented carbide) and use indexable inserts.


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