Fan Lijun, Director of Gear Grinder Research Institute, Institute of Technology, Shaanxi Qinchuan Machinery Development Co., Ltd.
Grinding is the best solution for efficient machining of high-performance gears. High-precision grinding through complex three-dimensional tooth surface modification can ensure the bearing capacity and motion stability of the gear under variable load conditions, which can well solve the tooth surface modification, high precision, high reliability, long life, High transmission efficiency and low noise.
High-precision gear process scheme: rolling → heat → grinding tooth solution. The accuracy of hobbing after machining reaches the national standard level 7, the tooth surface is soft tooth surface and the surface roughness is poor; the hardness of the tooth surface is improved after heat treatment, but the deformation is large, and the grinding needs to be carried out to improve the gear precision and reduce the hard tooth surface. Roughness value.
Advantages of the grinding process: Grinding is the final machining process, which can eliminate various errors in the previous process, especially the error caused by heat treatment deformation; the finishing of the reference surface can be used before grinding, so high precision can be obtained; Since the grinding teeth can obtain high tooth profile accuracy, combined with various shaping functions of the tooth profile, the gear can realize partial conjugate transmission in the transmission process, which meets the ideal requirements of the user.
Based on the above advantages, grinding can achieve: 1 grinding teeth can process high-precision tooth surface shape and low surface roughness value of the gear. 2 grinding teeth can achieve precise shape modification. 3 grinding teeth can control the shape of the tooth surface. 4 grinding teeth can machine hard toothed gears. 5 High-efficiency grinding can solve the problem of gear surface and sub-surface quality well and obtain the ideal compressive stress.
At present, with the continuous advancement of technology and the continuous improvement of user requirements, gear grinding machine tools are developing in the direction of high efficiency, high precision, functional compounding, flexibility, intelligence and environmental protection.
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