滚磨光整对齿轮表面完整性和性能的影响OA北大核心CSTPCD

Taking the helical gear in the twelfth transmission of a heavy truck as the object,the effect of the roll finishing on the surface roughness,surface topography,microhardness,and residual stress of gearwereinvestigated,and the transmission efficiency and noise of the unpolished and polished transmission were obtained and compared.Results show that the tooth surface roughness Raof gear decreases from 0.815 to 0.317 μm,the surface crater marks treated by shot peening disappear,and the surface topography is uniform.The surface microhardness and residual stress of the tooth surface are improved significantly,and the surface residual compressive stress exceeds 1 000 MPa.The residual compressive stresswith a depth greater than 0.02 mm cannot be enlarged by roll finishing.After roll finishing,the comprehensive transmission efficiency is increased by 0.54%approximately,and the average noise value is reduced by about 1-3 dB(A).