The development of the machinery industry, especially the automotive industry, places higher demands on production efficiency. An important way to improve efficiency is to increase the speed of processing and achieve high speed. At the same time, certain special difficult-to-machine materials in aerospace and other fields must also be processed at high speed to meet design requirements. Internationally, the spindle speed of metal cutting machine tools has reached 20 000r/min, the feed speed is up to 100m/min, and the acceleration is 1g.
High-speed precision machining has the advantages of high production efficiency, high machining accuracy, high surface quality and low production cost. The development of high-speed cutting tools has changed the processing technology, and the surface quality after processing has been improved by "cutting and grinding", and the hardened material with a hardness of 50 to 60 HRC can be directly processed. On the other hand, the powerful forming grinding process can achieve “cutting by grindingâ€, grinding 25 to 32 mm at a time, hundreds of times faster than ordinary grinding machines. High-speed precision machining is becoming one of the most widely used processing methods in the machinery industry. It has developed rapidly in aerospace, automotive and parts, molds and other industries. High-speed and high-precision CNC machine tools will gradually dominate in these industries. At the same time, new tools such as super-hard tools and new coating tools emerge in an endless stream, which makes the tool life increase significantly under high-speed and high-efficiency cutting conditions, which will further expand the application range of high-speed precision cutting technology.
The high-speed precision machining technology is mainly applied to the processing of macro-scale parts and partial micro-parts, improving the processing speed, geometric precision and reducing the surface roughness value, so as to ensure the reliability of the matching of the machine components and the accuracy of the motion pair movement. Long life, low energy consumption and low operating costs. Traditional precision machining will create a new generation of high-speed, high-precision machining technology driven by modern science and technology. It is estimated that by 2020, 1~10μm precision machining grade high-speed machining, the surface roughness value can reach 0.02~0.4μm, and the milling speed for steel reaches 400-500m/min. It is estimated that by 2030, 0.5~1μm ultra-precision machining grade high-speed machining, the surface roughness value can reach 0.01~0.2μm, the milling speed for steel reaches 1500~2 500m/min, and it is high-speed machining of deep sub-micron precision. Technical support (accuracy better than 0.3μm) provides technical support.
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