Traditional way of cutting speed

In traditional cutting methods, the cutting speed is always based on the selected cutting depth and feed speed. Under the condition of ensuring reasonable durability of the tool, a more reasonable value is selected. This is because the cutting speed It has a very obvious impact on the durability of the tool. Generally, increasing the cutting speed will greatly reduce the durability of the tool. According to the Salomon high-speed machining theory, when the cutting speed increases to a certain value, the cutting heat and cutting force that affect the tool durability are reduced to varying degrees, thereby improving the cutting conditions to a certain extent. Determining the appropriate cutting speed is very important for high-speed machining. However, because different machine tools and different tool materials have different cutting speed choices when cutting different materials, there are currently only some high-speed machining process parameters for reference.

Feed speed

In traditional machining, the feed speed is limited by the cutting speed and the rigidity of the process system, and generally takes a smaller value; however, in high-speed machining, because the cutting speed With the increase, the cutting force and cutting heat are reduced, which allows a larger feed speed to be selected when processing smaller residual materials; at the same time, a larger feed speed can also effectively prevent problems caused by high cutting speeds. Problems such as workpiece surface and tool burns, built-up edges and work hardening. For example, when a ball end mill with a diameter of 10 mm and a TiAlN coating material is used to process pre-hardened steel with a hardness of 40HRC, when the spindle speed reaches 12,000 r/min, the feed speed can be as high as 2,500 mm/min. In some situations where the tool diameter is smaller and the spindle speed is higher, the feed speed can also take a higher value. However, the higher the feed speed, the better, because too high a feed speed will reduce the surface processing quality of the workpiece.

Cutting speed formula

Vc=πDN/1000

π: 3.14

D: The lathe is the workpiece diameter, the milling machine is the milling cutter Diameter, in short, is the diameter of the rotating body on the machine tool

N: rotation speed

1000: mm converted into m.