| Gear is an important motion and power transmission component.The safety and service life of automobile transmission system directly depend on the processing quality of gearbox gear.The market scale of China’s automobile industry is increasing year by year,and the gearbox gear manufacturing mode has been transformed into an intelligent automatic production line of highend machine tool equipment combined with manipulator loading and unloading.The use of double-flank gear rolling test instrument in large-scale gear detection can quickly obtain information such as radial comprehensive deviation,but it is difficult to separate single deviation from it,and single deviation is very important for analyzing gear error sources and evaluating processing quality.Non-contact gear single error detection based on optical measurement principle has the advantage of higher measurement efficiency and more complete tooth surface information than traditional methods.With the development of measurement technology,composite gear measurement becomes possible.This thesis takes the comprehensive detection of gearbox gears as the research goal,and studies the composite gear measurement system that integrates non-contact single error measurement into comprehensive error measurement based on double-flank gear rolling test instrument.The main research contents are as follows:Research on measurement method of double-flank comprehensive error.Based on the principle of double-flank gear rolling test,the dynamic model of double-flank gear rolling test is established.The dynamic simulation of double-flank gear rolling test is carried out by ADAMS.The influence of spring stiffness and driving speed on meshing curve is proved,and the FFT spectrum of meshing curve at different speeds is analyzed.Through the double-flank gear rolling test experiment,the radial comprehensive total deviation,tooth-to-tooth radial comprehensive deviation,radial runout deviation,center distance,span bar distance and common normal line are separated from the meshing curve.In order to improve the measurement accuracy,a method of quickly calibrating the center distance by using the cross bar distance or the common normal line is proposed to realize the fast and accurate measurement of the gear,which lays a foundation for the later docking with the automatic production line.Research on non-contact single error measurement method of gear.According to the relationship between the incident beam of the spectral confocal displacement sensor and the normal angle of the cylindrical gear involute,an offset measurement scheme is proposed.By constructing the mathematical model of offset gear non-contact optical measurement,the calculation method of maximum offset distance and coordinate transformation of measurement data is proposed for different gear parameters.The influence of gear basic parameters and offset distance on the normal angle between incident beam and involute is explored.By analyzing the measurement data,the effective data in the middle of the involute is extracted for coordinate transformation,and the single error evaluation methods such as pitch deviation,helix deviation and tooth profile deviation are proposed to realize the non-contact single error measurement of gears.Transmission gear automatic production line edge detection system software development.According to the production process of gear and the layout of automatic production line,using.NET development platform,WinForm framework and SQL Sever database,using C#high-level language to develop a composite gear edge measurement software system.The system mainly includes double-flank comprehensive error measurement module,non-contact single error measurement module and composite measurement module.The double-flank gear rolling test module is seamlessly connected to the production equipment based on PROFINET and TCP/IP communication protocol,which realizes the automation and informatization of the gearbox gear production line.Based on the principle of mathematical statistics,MSA(Measurement Systems Analysis)module and SPC(Statistical Process Control)module are developed to monitor the stability of the measurement system and the processing quality of the gear. |
