Linear cutting machining method for mortise of aviation turbine disc

The invention discloses an aviation turbine disc mortise linear cutting machining method, relates to the technical field of aero-engine machining, and aims to solve the problem that residual stress easily affects machining quality. The invention relates to an aviation turbine disc mortise linear cutting processing method, which is characterized by comprising the following steps of: 1) clamping a blank of a turbine disc, namely clamping the blank of the turbine disc by utilizing an inner hole of the turbine disc and adopting an axial compression mode; (2) angular alignment is conducted on the blank of the turbine disc, and an A axis is aligned; (3) linear cutting is adopted, and at least one kerf used for releasing stress is machined in the machining position of each mortise; (4) roughly cutting the contour of the mortise by linear cutting, and leaving a margin; and (5) the outline of the mortise is precisely cut to the size through multiple times of linear cutting, and the thickness of a remelting layer after