Numerical control gear rolling machine

The invention relates to a device for processing reversed taper teeth of an internal spline of an automobile synchronizer tooth case, in particular to a numerical control gear rolling machine, which comprises a lathe bed and an upright post fixed on the lathe bed; an up-and-down slipway is connected with the upright post through a linear guide rail A; a hydraulic cylinder is arranged on the top of the upright post to control the slipway to move up and down; a cutter shaft internal taper sleeve is arranged in the up-and-down slipway; a workpiece end face pressing piece is connected with the up-and-down slipway through a linear guide rail B; a spindle is supported and arranged on the lathe bed through a bearing; a servomotor A drives the spindle and the spindle drives a cutter shaft to rotate; and an extruding slipway is arranged on the lathe bed through a linear guide rail C and is connected with a servomotor B through a ball screw. The M value variation of products processed by the numerical control gear roll