Increasing cutting rate to improve material removal rate is the basic way to improve cutting efficiency.

Increasing cutting rate to improve material removal rate is the basic way to improve cutting efficiency. Commonly used high-efficiency cutting methods are high-speed cutting, strong cutting, plasma arc heating cutting and vibration cutting. High speed cutting, strong cutting, plasma arc heating cutting.

Vibration cutting generally refers to the cutting speed that can be achieved by using carbide tools. The cutting speed above 45m/s is called high speed grinding. High speed cutting (or grinding) can improve efficiency and reduce surface roughness. The cutting speed of common steel can reach 200 m/min with carbide tool, 500 m/min with ceramic tool and 900 m/min with diamond tool.

The speed of ultra-high speed cutting in the laboratory can reach more than 4000m/min. Since the 1960s, the grinding speed has gradually increased from about 30m/s to 45, 60, 80 to 100 m/s, and the grinding speed in the laboratory has reached 200m/s. High-speed cutting (or grinding) requires a machine tool with high speed, high stiffness, high power and good vibration resistance of the process system; requires a reasonable geometric parameters and convenient fastening tool, but also need to consider a safe and reliable chip breaking method. Refers to large feed or deep cut machining, generally used for turning and grinding (see slow feed grinding). The main feature of powerful turning is that besides the main cutting edge, the turning tool has a sub-cutting edge parallel to the machined surface of the workpiece to participate in cutting at the same time, so the feed can be increased several times or even ten times than the general turning. In general machine tools, strong cutting can be carried out as long as the power is enough and the stiffness of the process system is good. Compared with high-speed cutting, the cutting temperature is lower, the tool life is longer, and the cutting efficiency is higher; the disadvantage is that the machined surface is rough. In strong cutting, the radial cutting force is very large, so it is not suitable for processing slender workpiece. Using the high temperature of plasma arc to instantaneously heat the part of the cutting area of the workpiece to 800 ~ 900 C, ceramic cutting tools are often used to process large parts. When cutting, the heating intensity of plasma arc should be adjusted according to the material, size, cutting speed, cutting depth and feed of the workpiece. After proper adjustment, the temperature of the machined surface of the workpiece can be maintained below 150 C without any change of the metallographic structure. This method is suitable for Machining Hardened and difficult to cut metal materials. The material removal rate can be increased by 2~20 times and the cost reduced by 30 to 85%.