In CNC machining, flat-bottomed end mills are commonly used for milling the inner and outer contours of plane parts and the milling plane. The empirical data of the relevant parameters of the tool are as follows: First, the radius of the milling cutter RD should be less than the minimum radius of curvature Rmin of the inner contour surface of the part, generally RD= (0.8-0.9) Rmin. The second is the machining height of the part H< (1/4-1/6) RD to ensure that the knife has sufficient rigidity. Third, when milling the bottom of the inner groove with a flat-bottomed end mill, because the two passes of the groove bottom need to be overlapped, and the radius of the bottom edge of the tool is Re=Rr, that is, the diameter is d=2Re=2(Rr), when programming Take the tool radius as Re=0.95 (Rr). For the processing of some three-dimensional profiles and contours with variable bevel angles, spherical milling cutters, ring milling cutters, drum milling cutters, tapered milling cutters and disc milling cutters are commonly used.
Most of the CNC machine tools use serialized and standardized tools. For tool holders and tool heads such as indexable machine clamping external turning tools, face turning tools, etc., there are national standards and serialized models. For machining centers and automatic tool changers Machine tools and tool holders have been serialized and standardized. For example, the standard code of the tapered tool system is TSG-JT, and the standard code of the straight tool system is DSG-JZ. In addition, for the selected tool, Before use, the tool size needs to be strictly measured to obtain accurate data, and the operator enters these data into the data system, and completes the processing process through program call, thereby processing qualified workpieces.
