Cutting speed :
The choice of cutting speed mainly depends on the material of the workpiece to be processed; the choice of feed speed mainly depends on the material of the workpiece to be processed and the diameter of the end mill. The tool samples of some oversea tool manufacturers are attached with a tool cutting parameter selection table for reference. However, the selection of cutting parameters is also affected by many factors such as the machine tool, the tool system, the shape of the workpiece to be processed, and the clamping method. The cutting speed and feed rate should be adjusted appropriately according to the actual situation.
When the tool life is the priority factor, the cutting speed and feed speed can be appropriately reduced; when the chip leaving the edge condition is not good, the cutting speed can be appropriately increased.
Up and down milling：
Down milling helps prevent damage to the cutting edge and can increase tool life. However, there are two points to pay attention to: ① If using ordinary machine tools, try to eliminate the gap of the feed mechanism; ② When the surface of the workpiece is left with the oxide film or other hardened layers formed by the casting or forging process, it is advisable to adopt up-cut milling.
