Correlation Analysis Of Waveness In Involute Tooth Profile With Transmission Performance And Machining Vibration

Gear is a widely used basic component,which plays a vital role in industry,national defense,people’s livelihood and other fields.Gears’ quality has a direct and serious impact on its service life and performance.At present,gears are developing towards high efficiency,low noise,long life,high reliability and lightweight.Therefore,a lot of research has been carried out at home and abroad from the aspects of design,processing and use,in order to achieve: rapid acquisition of three-dimensional full information of gears,data sharing based on cloud platform,knowledge mining and accumulation based on analysis of big data,gear accuracy evaluation based on full information,gear process error analysis and traceability,prediction of gear dynamic performance.The analysis and application of measured gear data such as gear pairing in the whole range will be completed in the cloud.And the "full life cycle" closed-loop control of gear design,processing,detection and service linked by measurement of gear will be realized.The purpose of this thesis is to deeply mine the measured gear data,obtain the waveness information of the tooth surface,and establish the correlation between it and the gear transmission performance and machining vibration.The main research work of this thesis is as follows:(1)In terms of the establishment of parameter equation of involute profile with waveness and the acquisition of measured waveness information of tooth surface,based on the involute parameter equation and the definition of tooth waveness,the parameter equation of profile with waveness was established.In terms of establishing the parameter equation of involute profile with measured waveness,the actual tooth surface data measured by gear measurement center was used,and the surface information was fitted combined with fourier series.Finally,the parameter equation of involute profile with measured waveness was obtained,which laied a foundation for the subsequent research on waveness.(2)In terms of correlation analysis between tooth surface waveness,tooth surface contact stress and gear transmission error.According to the parametric simulation model of involute profile with waveness,the matching transmission of gears with different waveness parameters and standard gears was carried out by finite element analysis,then,the contact stress of tooth surface and gear transmission error were obtained.The contact stress and transmission error results were compared and analyzed respectively.The results showed that the wavelength and phase of waveness had a strong correlation with the distribution position of contact stress,and the amplitude of waveness had a strong correlation with the magnitude of contact stress.And the obvious order of transmission error amplitude will change with the change of wavelength,and the fluctuation amplitude of transmission error will increase with the increase of waveness amplitude.(3)In terms of correlation analysis between tooth surface waveness and machining vibration,carried out the vibration test of the machine tool in the gear processing process.After the processing was completed,extracted the tooth surface waveness information of the processed gear,analyzed the vibration signal and waveness information in the time domain and frequency domain,and explored the influence of the machine tool vibration on the waveness of the tooth profile.The results showed that the frequency domain component of the vibration signal was stable,and the trend fluctuation times of the vibration in the time domain results will affect the fluctuation times of the waveness of the involute tooth profile.The correlation between the waveness of involute profile and the vibration signal of machine tool was established in the time domain.