Machining method for conical inclined crown of blade

The invention discloses a machining method for a conical inclined crown of a blade and belongs to the technical field of blade machining. According to the invention, the machining method for the conical inclined crown of the blade comprises the following steps: firstly, mounting the blade on a machine tool; machining a blade crown opening surface of the blade by using a milling cutter with octagonal blades, wherein the milling cutter comprises a rod-shaped handle and a cone frustum-shaped bit, and the handle is connected with the small end of the cone frustum-shaped bit; and a plurality of octagonal blades are uniformly distributed at the edge part of a big end of the cone frustum-shaped bit, so that the milling cutter machines the blade crown opening surface for two times by using a spiral feeding method. The machining method for the conical inclined crown of the blade, disclosed by the invention, has the advantages as follows: the machining efficiency is increased; the conical inclined crown of the blade can be cut in place at one time; both the opening part and the root part R can be sufficiently machined into place; due to spiral feeding, peaks and valleys are comparatively uniform and stable; the service life of the cutter is longer under the effect of a constant force; the load of a machine tool spindle is stable and the loss of the machine tool is small; the attention is unnecessarily paid to the machining state in machining at any time; and the probability of generating fatigues is low.