Modeling Of Linear Axis Motion Characteristics Of Gear Measuring Center

The gear measuring center is an advanced precision measuring instrument and equipment,and the technological progress in recent decades has made the gear measuring center an undisputed universal quality control tool in precision engineering.With the industrial development of the measurement efficiency requirements,people demand higher measurement speed,in the high-speed movement,the dynamic error becomes the main component affecting the accuracy of gear measuring center,but the dynamic error mechanism is complex and difficult to decouple.In order to analyze the dynamic characteristics of the linear axis of the gear measuring center,this thesis intends to use theoretical analysis and experimental methods to reveal the linear axis motion law of the gear measuring center and carry out modelling and simulation to provide experimental data and theoretical basis for subsequent research on motion error compensation and accuracy improvement.This paper takes the D65 gear measuring center as the research object,and by analyzing the component parts and body structure of the gear measuring center,it derives its system error composition,which affect its dynamic characteristics.The linear axis dynamic characteristics of the gear measuring center are established.A linear axis dynamic test platform is established and its linear axis dynamic characteristics under the control of different motion parameters are analyzed.An error measurement test rig was established and through extensive experimental work,the measurement data of the gear measuring center under different motion parameters were obtained.The motion law of the gear measuring center was summarized and the overall measurement process was divided into three stages: acceleration-constant speed-deceleration.The motion error in the uniform velocity phase was fitted by the equation method.The BP neural network and function fitting models of the dynamic characteristics of the measuring machine were established respectively under the dynamic characteristics of the integrated measuring machine,and the validity of the models was verified.The characteristics of the two models are analyzed and compared,and the superiority of the function fitting prediction model is proved.The motion error in the uniform speed phase is fitted by the equation method model,and a better error fitting accuracy is achieved.It lays the foundation for the subsequent compensation of the overall dynamic error of the gear measuring center and provides a guarantee for improving the measurement efficiency and enabling the gear measuring center to maintain accuracy in the dynamic measurement process.