Fir-type root milling cutter is an important tool for processing the blade roots of a steam turbine.Compare with the traditional straight-groove milling cutter,the spiral groove type FIR-type root milling cutter has the advantage of quick cutting,high efficiency,long service life,reduced cutting force and vibration of the cutter,and improve processing quality of the leaf roots surface of FIR-type blade.The prefabrication technology of the spiral groove type fir-tree root milling tool is mainly studied.Firstly,NUMROTOPLUS,PRO/E,and VERICUT are used to create a three-dimensional model of the cutting tool and to pre-fabricate a work blank.Secondly,ANSYS software is used to simulate the model to verify the rational-ity of parameters such as the thickness of the cutter core and rake angle.Then NUMROTO software is used to simulate and verify the tool path planning and simulation.Finally,the SAACKE UWIF five-axis tool grinder is used to finish the cutting tool precisely,and the tool is inspected.The result shows that the process plan is feasible.
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