Aiming at the problems of low forming contour accuracy,high roughness and short tool life in the traditional broaching and wire cutting and then milling in the machining of large steam turbine rotor grooves,this paper proposes a fea-sible multi-tool wheel groove processing scheme.Firstly,the tool is designed by NUMROTOplus software,and the rationality of the parameters such as the core thickness and the rake angle of the tool is preliminarily verified.Secondly,the finite ele-ment model of the forming milling cutter is established by ANSYS software.The force and heat in the cutting process are an-alyzed by taking the semi-finishing milling cutter as a typical case,and the structure of the wheel groove milling cutter is optimized.Thirdly,NUMROTOplus software is used to carry out finishing path planning and simulation verification of the tool.Finally,the trial production of the tool is completed by the Saacke UWIF five-axis tool grinder,and the tool after trial production is tested and the wheel groove cutting test is carried out.The results show that the scheme can improve the accu-racy and life of the wheel groove and tool,and verify that the process scheme is feasible.
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