| Integral impellers are known as key components and power components in the areas of energy and power,research on its high-efficiency,high-precision CNC machining technologies can be beneficial to improve enterprises’ advanced manufacturing technologies of complex and intractable parts in terms of machining.With the rapid development of science and technology,five-axis NC machine tool has gradually become essential high-end manufacturing equipment of machining integral impellers.NC machining programming technology of complex parts,simulation and optimization technologies are key technologies to realize high-performance NC machining of integral impellers.Taking some integral impeller as the research object,study is conducted around some key technologies of realizing high-performance NC programming and machining,cutting simulation and cutting parameters optimization of integral impellers,and the main research contents are shown as follows:(1)On the basis of consulting the data at home and abroad,the research situation and the latest progress of research issue are summarized,which make it ready for the main research contents,research methods and research ideas of this paper.(2)Post-processing technology of five-axis NC machine tool is studied,and the corresponding post-processing algorithms is deduced.RTCP function and implementation principle of NC system is studied,the influences on post-processing precision and efficiency are also studied respectively when RTCP function is open and closed.(3)The five-axis NC machining program of integral impeller are generated.The five-coordinate NC machining process and tool path of the integral impeller are analyzed and planned according to the machining difficulties and technical requirements,and machining program of integral impeller are generated finally.(4)Machine tool model’ for virtual machining simulation is constructed f’or five-axis NC machining program of integral impeller,and the machining program of integral impeller is optimized geometrically,which made the machining program more safer and efficient.(5)The dynamic simulation of milling force is conducted during machining integral impeller,and the prediction model of milling force is generated,which can accurately predict the size and direction of the milling force in different milling conditions at any time during machining integral impeller.And according to the dynamic simulation results of cutting force,roughing and finishing parameters of integral impeller’s hub are optimized,which made the machining efficiency increased by 39.29%and 75.0%respectively.The optimization method provides a better reference for practical machining engineering,and so do the improvement of machining process for integral impellers and the optimization design of the cutting tools structure. |
