The main function of the geometric angle of the milling cutter

       

1.front angle:It's the most important point on the tool. Increased front angle, sharp cutting edge, small deformation of the cutting layer metal, reducing the frictional resistance of the chip through the rake face, so the cutting force and cutting heat will be reduced, but the cutting part of the strength and cooling capacity will be weakened.The reasonable value of the rake angle is mainly determined according to the workpiece material, the processing strength, the hardness is low, the plastic big metal should take the larger front angle



2.Rear angle:The main role of the rear corner is to reduce the flank and the friction between the workpiece, while the size of the horn will also affect the strength of the knife.Since the cutting thickness of each tooth is small, the value of the rear corner is generally larger than that of the turning tool to reduce the friction between the flank and the workpiece.



3.Helix angle:It is actually the blade angle of the cylindrical cutter or end mill. When the helix angle is 0 °, the cutting edge cuts along the full length of the workpiece at the same time, and finally leaves at the same time, so it is prone to vibration.Increase the helix angle, the knife teeth along the cutting edge gradually cut and cut out, thereby enhancing the smoothness of the cutting process.In addition, to increase the helix angle, you can get the effect of cutting edge cutting, so that the actual front angle increases, and can improve the workpiece surface quality, which is a large spiral angle milling cutter cutting the main reason.