End Cutting Of Milling Cutters

In the CNC milling process of workpiece cavities such as molds, when the cutting point is a concave or deep cavity, it is necessary to extend the extension of the milling cutter. If a long blade milling cutter is used, due to the large deflection of the tool, it is easy to breed vibration and cause tool breakage. Therefore, during the machining process, if only cutting edges with similar tool ends are needed for cutting, it is best to choose a short blade long shank milling cutter with a longer total tool length. When using large diameter milling cutters on horizontal CNC machine tools to process workpieces, due to the significant deformation caused by the tool's self weight, great attention should be paid to the issue of excellent end cutting. When it is necessary to use a long blade milling cutter, it is necessary to significantly reduce the cutting speed and feed rate.
Selection of cutting parameters
The selection of cutting speed mainly depends on the material of the workpiece being processed; The selection of feed rate mainly depends on the material of the workpiece being processed and the diameter of the milling cutter. Some foreign tool manufacturers' tool samples are accompanied by tool cutting parameter selection tables for reference. However, the selection of cutting parameters is also influenced by various factors such as machine tools, tool fragments, the shape of the workpiece being processed, and clamping methods. Therefore, the cutting speed and feed speed should be adjusted appropriately based on practical situations.
When prioritizing tool life, it is advisable to reduce cutting speed and feed speed; When the cutting edge condition of selling chips is not good, it is advisable to increase the cutting speed.
Selection of cutting methods
Accepting forward milling is beneficial for defending blade cover and improving tool life. But there are two needs to pay attention to: ① if ordinary machine tools are accepted for processing, efforts should be made to eliminate the gap of the feeding mechanism; ② When selling workpieces with residual oxide films or other hardened layers formed by casting or forging processes, it is advisable to accept reverse milling.