Accurate Modeling And CNC Machining Of Turbine Blades

The design of turbine blades of aero-engine has always been one of the key research objects in aviation field.According to the change of the working environment of the blades,the design requirements of the blades are also gradually improving.In order to solve this problem,it is urgent to establish a parameter model considering turbine blades from mathematical modeling to optimization and NC machining,based on the established overall parametric model,to complete the subsequent tasks and work,so as to shorten the development cycle of blades.The aim is to improve production efficiency It is of great scientific significance and engineering value to establish the overall parameter model of blades.In order to rapidly optimize and process turbine blades,this paper establishes the overall parametric equation model of blades,optimizes and improves some of its parameters based on the established blade parameter equation,optimizes and then designs the blade contour structure,and finally achieves the goal of improving work efficiency.According to the established three-dimensional model and parameter equation of blade,the machining technology of blade is planned,and the NC machining program is written manually.The main contents are as follows:Through the improvement of the section contour structure of the turbine blade,the whole parametric equation of the blade is established,and the precise coordinates of any point on the blade surface can be solved by establishing the parametric equation,and the data points of the blade surface are obtained.According to the theoretical data points obtained,the three-dimensional model of blades is established by using UG software.Compared with the traditional three-section method,the blade model established by the global parameterization method has higher precision and more reliability.The establishment of the whole parameter equation provides a more accurate data source for the optimization and processing of the subsequent model,and is more reliable in theory.The geometrical inlet angl ?lr and geometric outlet angle ?2r of the blade are optimized and redesigned,and the work efficiency of the model structure is improved by 0.625%compared with the original parameters by the calculated new parameter value.The optimization purpose is achieved,and the feasibility of the whole parameter model is verified.Similarly,according to the new parameters after optimization,a new three-dimensional model of blades is established.The machining technology of the blades is planned and analyzed,and the machining parameters of the blades are given the calculation range,and the machining parameters can be determined quickly according to the processing requirements,taking into account the calculation results.According to the transformation relation of the coordinate system of the five-axis machining center,the parameter equation of the blade finishing program is obtained,and the machining program of the blade can be obtained quickly according to the parameter equation.For the blades with different performance requirements,after changing the parameters,the machining program can be quickly obtained according to the method,and the production cycle of the blades can be shortened.Based on the overall parameter model of turbine blades,satisfactory and reliable results are obtained in the optimization of blades and the machining of blades.Not only the working performance of turbine blades has been effectively improved,but also the corresponding contribution has been made in the production design cycle of blades.The whole parameter model of Blade is established,and the parametric machining code is generated,which has a great prospect of engineering application.