NEWS
Yongkaida
Breakthrough Advances in Domestic Gear Manufacturing Technology Empower the Upgrading of High-End Equipment Industries
Release time:
2021-11-09
Recently, a research team led by Professor Fang Zhenglong at Beijing University of Aeronautics and Astronautics, in collaboration with domestic and international research institutions, has achieved a major technological breakthrough in the field of high-performance gear manufacturing. The findings have been published in the internationally renowned journal CIRP Annals, laying an important foundation for China’s independent and controllable development of high-end gear manufacturing. At the same time, the domestic gear manufacturing industry is accelerating its intelligent transformation and upgrading, precisely aligning with the demands of high-end equipment such as new-energy vehicles and industrial robots, thereby ushering the sector into a new phase of high-quality development.
Recently, a research team led by Professor Fang Zhenglong at Beijing University of Aeronautics and Astronautics, in collaboration with domestic and international research institutions, has achieved a major technological breakthrough in the field of high-performance gear manufacturing. The findings have been published in the internationally renowned journal CIRP Annals, laying an important foundation for China’s independent and controllable development of high-end gear manufacturing. At the same time, the domestic gear manufacturing industry is accelerating its intelligent transformation and upgrading, precisely aligning with the demands of high-end equipment such as new-energy vehicles and industrial robots, thereby ushering the sector into a new phase of high-quality development.
This technological breakthrough focuses on additive–subtractive hybrid manufacturing processes, addressing longstanding challenges in conventional gear machining such as insufficient dimensional accuracy and non-uniform surface hardness. By optimizing process parameters for laser powder bed fusion and extreme negative rake-angle cutting, the research achieves synergistic strengthening through grain refinement on the gear tooth surfaces and martensitic phase transformation. The resulting gears exhibit form tolerances within 0.006 mm, surface hardness of 58–62 HRC, and a 40% improvement in contact fatigue life, thereby meeting the demanding high-speed, heavy-load operating conditions of transmissions for new-energy vehicles and servo motors.
On the industrial application front, technological innovation is driving deep integration between gear manufacturing and the high-end equipment industry. Data indicate that China’s gear market will exceed RMB 90 billion in size by 2025, with demand for reduction gears in new-energy vehicles expanding at an annual average rate of 19%. Leading domestic firms have established intelligent production facilities and, through a comprehensive quality-control system encompassing surface-hardening heat treatment, ultra-precision machining, and end-to-end quality assurance, have achieved a finished-product yield of 99.5%, increased per-capita output value to RMB 480,000 per year, and raised export unit prices by 61% compared with 2018.
At the policy level, the State’s “Work Plan for Ensuring Steady Growth in the Machinery Industry” identifies precision gears and other basic components as priority areas for enhancement, providing policy support such as subsidies for technological breakthroughs and the refinement of standards systems to drive industrial upgrading. Industry experts note that this technological breakthrough not only resolves the “bottleneck” issue in high-end gear manufacturing but also accelerates the transformation of China’s gear-making sector from “scale expansion” to “quality improvement,” thereby offering a more competitive Chinese solution for the global high-end equipment value chain.
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