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The key to the development and application of key technologies for high-speed precision CNC lathes is through the key points of C-axis precision, tool holder balancing system, car-grinding composite machining technology, machine tool dynamic performance analysis and structural optimization design of high-speed spindle rotary system and turning-milling combined machine tool. The research of technology has basically mastered the related technologies that affect the performance, accuracy and reliability of high-speed precision CNC lathes. The optimized high-speed precision CNC lathe spindle has a maximum speed of 8000r/min. The subject of "improving the key technology of positioning accuracy of mid-range CNC machine tools" has carried out experiments and researches on improving the rigidity of the feed system, improving the sliding performance of the guide rail, and reducing the systematic error of the feed system, and determined the influence of the positioning accuracy of the mid-range CNC machine tools. The main factors and the corresponding measures have been taken.
“Research and Application of Key Technologies for High-Speed ​​Precision CNC Lathes†(borne by Nanjing CNC Machine Tool Co., Ltd.) and “Key Technology Research for Improving Positioning Accuracy of Mid-range CNC Machine Tools†(accepted by Jinan I Machine Tool Group Co., Ltd.) Passed the acceptance.