A twisted engine blade with a rough surface is continuously being polished on a CNC machine. Under precise control, the sand belt smooths every corner of the blade, leaving no area untouched. This advanced process plays a vital role in ensuring the performance and efficiency of aeroengines.
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Don't underestimate this process—smooth blades are essential for optimal engine performance. The technology behind it has broken foreign monopolies and provided critical support for China's nuclear power, gas turbine, and aeroengine industries.
Liu Shusheng, general manager of Hongji CNC Equipment Co., Ltd., explained that complex curved surfaces on blades are key components in power plants like steam turbines and aeroengines. Their geometric accuracy and surface quality directly impact energy efficiency and equipment safety.
The "Key Blades for Complex Machining of Six-axis Linkage Numerical Control Belt Grinding Mill Key Technology Research and Application" project developed by Beijing Shengwei Hongji CNC Equipment Co., Ltd. has achieved independent intellectual property rights through research and development. This six-axis blade linkage NC grinding machine solves challenges in finishing complex blade surfaces, breaking foreign technological barriers.
Manual polishing has long been a bottleneck in blade production. It's inefficient, imprecise, and harmful to workers' health. As energy systems grow more powerful, blades have become more intricate, making manual methods increasingly inadequate.
For large blades like those in nuclear power plants, hand-polishing is not only time-consuming but also leads to inconsistencies that affect performance and safety. For smaller, highly detailed aero-engine blades, manual polishing risks damaging delicate edges and contours, leading to unreliable results.
To address these issues, Liu Shusheng and his team aimed to develop a six-axis CNC grinding machine, a task once considered impossible. They created proprietary programming software and a six-axis CNC system capable of handling complex blade geometries.
With new materials and structures, blade designs have become even more challenging. The team introduced a nine-axis, six-axis linked CNC grinder, enabling efficient and high-quality finishing of complex surfaces. This innovation surpassed existing foreign technologies.
Since its introduction, the domestically developed six-axis CNC belt grinder has met growing demand across China. It's now used in nuclear turbine blade manufacturing and aeroengine production, significantly improving blade consistency and performance.
Companies like Dongfang Steam Turbine and Wuxi Turbine Blade have seen remarkable improvements, with processing quality jumping to a new level. Even international experts were surprised by the precision achieved.
Looking ahead, Liu Shusheng believes smart manufacturing and 3D printing will drive further innovation. With continuous development, China's CNC technology is set to lead the global stage.
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