Research On Error Control Of Five-axis Flank Milling Of Complex Surface And Experimental

Integral impeller is one of the core parts of machinery industry, but also the key components of aerospace、automobile engine、sophisticated medical equipment. At the same time, Integral impeller is typical complex curved surface parts, and the five-axis NC machining is one of the effective means to realize the high efficiency cutting parts for complex surfaces. But the variable shape in process and complexity of design surface structure of impeller, tool path planning, which has brought many difficulties to generate the tool path of high quality.Based on the complex surface of impeller blade five-axis flank milling as the research background, the research of the integral impeller three-dimensional modeling based on UG, And calculate deformation calculation and machining deformation analysis of impeller blade using finite element analysis software ANSYS, by using the machining deformation error compensation method and the integral impeller flank milling tool path optimization method make up for machining deformation error, can be obtain the blade surface after the comprehensive optimization and compensation, reconstruction of blade surface and output processing code, through the experiments of high speed milling to verify the prediction method and the optimization method of accuracy compensation. In this thesis, the main research work and innovative achievements are as follows:Firstly, Based on the finite element analysis software ANSYS, predict the deformation process of flank milling machining of impeller blade.The empirical formula of milling force, the milling force of each point of the blade machining process was calculated, based on finite element analysis software ANSYS on the impeller blade flank milling process for simplification, and then define the attributes and constraints, grid division, the blade loading, solving the calculated deformation and obtain the deformation law of flank milling machining process of blade.Secondly, A compensation method is proposed for compensate comprehensive error of the impeller blade flank milling deformation process and tool path planning. Based on the finite element analysis software ANSYS forecast the deformation error of machining processing of blade of integral impeller, according to the two main factors that affect the machining error of the impeller blade:blade machining tool path planning and the deformation error, using multiple circular mirror compensation method and the integral flank milling cutter with trajectory optimization method to compensate the distortion error and optimized the tool path planning, reconstruction of blade surface after compensation and optimization, Output the machining code.Thirdly, Comparison experiment of five-axis NC milling of integral impeller, Using two experiments, namely common processing of enterprises in the processing method of the impeller and the impeller blade machining deformation after prediction and compensation、optimization process of impeller, to verify the correctness of the deformation prediction and error compensation method.