When milling flat surfaces on CNC machine tools, indexable hard alloy milling cutters should be used. It can be divided into two cuts. One rough milling and one fine milling. When cutting continuously. The diameter of the rough milling cutter should be reduced to reduce the cutting torque. The diameter of the precision milling cutter should be larger, and it is best to accommodate the entire width of the surface to be machined. When the machining allowance is large and the machining surface is uneven, the tool diameter should be selected smaller. Otherwise, during rough machining, the machining quality may be affected due to excessive depth of the tool mark.

2. High speed steel end mills are often used for processing bosses and grooves, and it is best not to use them for processing blanks, as there are hardened layers and Gaza phenomena inside the blanks. It will accelerate tool wear.

3. If the machining allowance is small and the surface roughness is required to be low, cubic boron nitride blade end mills or ceramic blade end mills should be used.

4. Hard alloy end mills can be used to process grooves, concave surfaces, convex surfaces, and rough surfaces.

5. The end milling cutter embedded with hard alloy can perform strong cutting. Milling of rough surfaces and rough machining of holes.

When machining grooves with high precision requirements, an end mill with a diameter smaller than the width of the groove can be used. First, mill the middle part of the groove, and then use the tool's radius compensation function to mill both sides of the groove until the accuracy requirements are met.

7. When drilling on CNC milling machines, drilling dies are generally not used. Deep holes with a depth of about 5 times the diameter are prone to breaking the drill bit. A fixed cycle program can be used to automatically advance and retreat multiple times to facilitate cooling and drainage. It is best to use a center drill to drill a center hole or a rigid section drill to drill the bottom hole before drilling, for positioning purposes

Drilling on a milling machine usually does not use a drilling jig. Deep holes with a depth of about 5 times the diameter are prone to breaking the drill bit, and fixed cycles can be used