How to choose the number of cutting edges of end mills

It is very important to choose the number of end mills according to the machining requirements. If the number of cutting edges is different, the machining performance and machining effect of the insert will also be different. A number of factors, such as workpiece material, cutting speed, cutting resistance, tool radial force and so on, must be considered when selecting the number of blades. The following are some common methods and principles for selecting the cutting edges of end mills.

1. Workpiece Material

Workpiece material is one of the first considerations when selecting the number of blades. For harder materials, such as steel, it is generally necessary to use fewer inserts, which can improve the load per edge and cutting efficiency. For softer materials, such as aluminum alloys, you can select inserts with a higher number of blades because the load per blade is lower, which can improve cutting stability and surface finish.

2. Cutting Speed

Cutting speed is one of the important reference indexes for selecting the number of cutting edges. The higher the number of cutting edges, the higher the feed per minute of the tool. Therefore, if the cutting speed is high, you can select the insert with a higher number of blades to improve machining efficiency. If the cutting speed is low, you can select inserts with fewer flutes to improve cutting stability.

3. Cutting Resistance

Cutting resistance is also an important factor in selecting the number of blades. The higher the cutting resistance, the higher the load per edge. If the cutting resistance is higher, you can choose a smaller number of inserts to improve the strength and life of the tool. And in the case of less cutting resistance, you can select the insert with more number of edges to improve the cutting efficiency.

4. Tool radial force

Tool radial force is also an important consideration when selecting the number of blades. The more the number of edges, the more uniform the radial force of the tool, which can reduce the possibility of vibration and deformation, improve cutting stability and surface quality. Inserts with fewer cutting edges usually have greater radial force, which is prone to vibration and deformation, which affects machining quality.

In summary, according to the machining requirements to choose the number of cutting edges of end mills must take into account the workpiece material, cutting speed, cutting resistance and tool radial force and other factors. In general, for higher hardness materials and high-speed cutting, you can choose a smaller number of inserts to improve cutting efficiency and stability. For softer materials and low speed cutting, you can select inserts with a higher number of edges to improve cutting stability and surface quality. In addition, according to the actual situation, experiments can also be carried out through the cutting test and performance evaluation of the tool to select the appropriate number of blades. The final selection of the number of cutting edges should be able to meet the machining requirements and achieve better results in terms of cutting efficiency, cutting stability and surface quality.

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