FIELD: working metals by cutting, namely working vane with twisted portion.
SUBSTANCE: tool includes annular body on end part of which end, outer and inner lateral cutting edges are arranged. Width of cutting portion of tool is equal to width of inter-vane duct in root section; width of annular wall of body is less than width of cutting portion. In order to improve accuracy and efficiency of working, end, outer and inner lateral cutting edges are formed by means of groups of tips uniformly arranged along perimeter of tool body. Each group has mounted successively at least two end tips arranged stepwise in rotation direction of tool and shifted along width of cutting portion, at least one outer lateral tip, at least one inner lateral tip and tip with rectilinear cutting edge.
EFFECT: improved efficiency and accuracy of working.
4 cl, 4 dwg
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