Segmented gear ring side blade milling method

In order to solve the problems that in the prior art, according to a segmented gear ring side edge milling method, the machining procedure is long, tooth skipping and tool changing are inconvenient, and fault tolerance is small, the segmented gear ring side edge milling method is provided, a four-axis machining center is adopted for machining a tooth groove of a segmented gear ring, and the machining precision of the segmented gear ring side edge milling method is improved. A main program is adopted as a control program for cutting tooth grooves with different phase angles theta on the segmented gear rings one by one; a subprogram is adopted as a machining program for cutting tooth grooves with different phase angles theta; and a post-processing constructor is adopted to compile the tool path track of the reference tooth groove into subprograms for machining tooth grooves with different phase angles theta, wherein the subprograms comprise point position information of cutting starting points of each time of f