Zhang Kai, deputy director of marketing department of Zhongjie Machine Tool Co., Ltd.

High speed cutting technology

High-speed cutting (HSC, High Speed ​​Cutting) technology is used in aerospace, aerospace, automotive, mold and machine tools industries for its high efficiency and high quality, especially for aircraft thin-walled parts and various complex profile parts.

1. High-speed cutting features and advantages

(1) Compared with ordinary CNC machine tools, high-speed cutting machine tools have the following characteristics: 1 high cutting speed and high spindle speed.

2 With high fast moving speed: The high speed milling machine has a fast moving speed of 30 to 90 m/min. 3 metal removal rate is high, cutting efficiency is high: when cutting 45 steel, the metal removal rate is usually 300 ~ 600cm3 / min. 4 with high rigidity and high precision.

(2) The above characteristics determine the following advantages: using high-speed cutting, the milling depth is small, the cutting line speed and feed rate are high, the milling force is low, and the heat generated by the cutting is mostly carried away by the chips flowing at a high speed, so the workpiece and The tool has small thermal deformation, short knife cutting time, reduced impact and bending, and small surface roughness: R a=0.4～0.6μm for milling aluminum alloy and R a=0.2～ for milling steel. 0.4 μm. There is no need for secondary processing such as polishing and grinding, which effectively improves the machining accuracy of the mold (see Figure 1).

Figure 1 Tire and complex cavity mold

Conducive to the processing of thin-walled molds and integral structural parts, the material removal rate of high-speed cutting is usually 3 to 5 times that of conventional, and high productivity is achieved in finishing. For example, high-speed cutting can make the aircraft use a large number of integral structural parts, significantly reducing component weight, improving part reliability and reducing assembly man-hours. In electronic products such as digital products or relays, thin-walled molds are difficult to process, and high-speed milling technology can be greatly improved. Thin-walled parts with a wall thickness of 0.2 mm and a wall height of 20 mm can be processed.

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