The Study On The Dynamical Property Of Y7125 Gear Grinder

The dynamical property, an important research direction, has attracted more attentions from the worldwide scientists and technologists. Y7125 gear grinder is a typical big-plane gear grinding machine. To improve its efficiency and precision in gear grinding, our group have done a lot of researches on it. Based on the former researches, this paper applies the dynamical property analysis to this machine, and has obtained some important data and conclusions. All these are beneficial to further dynamical researches on the whole machine. This paper is organized as follows:Firstly, the modal analysis on Y7125 gear grinder spindle is made. Modal analysis is the basis of dynamics, extracting themodal of the main parts can't absence in dynamical analysis. According to the theory of elastic mechanics and finite element method (FEM), the model of Y7125 gear grinder spindle is built using ANSYS5.7 (a kind of FEM analysis software). Using "subspace" Method, the main four stages modal of the spindle was extracted, and the natural vibration frequencies were provided. The deformation figures along with a large amount of data were also obtained here.Secondly, the kinetic simulated and error analysis on the main drive system of this machine were made, and the velocity and accelerated velocity was obtained. Using these data, we can judge if the machine will vibrate or not in dynamic condition. To obtain these data, the kinetic model of the main drive system was built and the error formula was deduced. In the analytic process, based on the "Newton-Simpson" theory, MATLAB (a kind of numerical analysis program) was used to solve the nonlinear equations. With the "Simulink" program of MATLAB, the kinetic simulation model and error simulation model was built, and the simulated figures of the kinetic mechanism were given. The results obtainedIVand their compatibility is also discussed in detail.Thirdly, the law of change in the grinding force is summed up. The grinding forces are the important data of the temporal response of dynamics (such as resonance and spectrum analysis). But because of the peculiarity of grinding machining, the grinding force is closely related to many grinding parameters, difficult to be directly calculated. Based on the simulated data of driving mechanics, the grinding forces are analyzed.