Beijing Gear Factory's mobile plant successfully completed the numerical control transformation of a straight bevel gear milling machine, becoming the first manufacturer in China to produce CNC straight bevel gear milling machines. This milestone marked a significant shift in the domestic gear manufacturing industry, aligning it with global automation trends.
Since the 1970s, the North Gear Machinery Power Plant had been producing double-head straight bevel gear milling machines based on West German designs, making it one of the earliest manufacturers in China. As the global machine tool industry moved toward full CNC automation, the plant initiated a collaboration with Henan University of Science and Technology in 2005 to modernize its Y2726 straight bevel gear milling machine.
The project began by overhauling an existing machine from an import and export company, restoring its precision and functionality. The original mechanical-hydraulic transmission system was replaced with a Siemens digital control system. The cradle and indexing head transmission mechanisms were redesigned and re-manufactured, while the original gearbox, machine wheel suspension mechanism, and counter were removed. To integrate with the CNC system, the hydraulic system was modified, manual controls were replaced with automatic ones, and unnecessary hydraulic components were eliminated. The movement of the cradle and indexing head was now controlled by servo motors through the CNC system, enabling precise and efficient milling operations.
This upgraded CNC machine significantly simplified the process of calculating adjustment cards and machine settings. Operators could input parameters directly into the system, and the machine would automatically display the required adjustments on the screen. Additionally, the machine’s precision and surface finish improved by one accuracy level, reducing noise levels and enhancing product quality. It also boosted production efficiency, earning widespread recognition from users and setting a new standard for gear manufacturing in China.
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