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Cutting conditions of difficult to machine materials

February 27, 2024

The cutting conditions of difficult to machine materials have always been set relatively low. With the improvement of tool performance, the emergence of high-speed and high-precision CNC machine tools, and the introduction of high-speed milling methods, at present, the cutting of difficult to machine materials has entered the period of high-speed machining and long-life tools. Now, the machining method of using small cutting depth to reduce the load on the cutting edge of the tool, so as to improve the cutting speed and feed speed, has become the best way to cut difficult to machine materials. Of course, it is also very important to choose tool materials and tool geometry that adapt to the unique properties of difficult to machine materials, and we should strive to optimize the cutting path of the tool.

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For example, when drilling stainless steel and other materials, due to the low thermal conductivity of the material, it is necessary to prevent a large amount of cutting heat from staying on the cutting edge. Therefore, discontinuous cutting should be used as far as possible to avoid friction and heat generation between the cutting edge and the cutting surface, which will help to prolong the tool life and ensure the stability of cutting. When rough machining difficult materials with ball end milling cutter, the tool shape and fixture should be well matched, which can improve the swing accuracy and clamping rigidity of the cutting part of the tool, so as to ensure that the feed rate per tooth is maximized under the condition of high-speed rotation, and at the same time, it can also extend the service life of the tool.