Aircraft engine blade profile machining, clamping and positioning method

The invention provides a clamping and positioning method for aircraft engine blade profile machining. The clamping and positioning method comprises the following positioning steps that firstly, a tool is used for clamping and positioning a dovetail wedge head according to the positioning requirement; secondly, the tip end of the cutter type tip is arranged on the end face of a blade tip process boss, and initial machining positioning is conducted on the aircraft engine blade; thirdly, a tool type center is used for milling the blade tip process boss; fourthly, after the end face of the blade tip process boss is machined, the tool type tip is withdrawn; fifthly, the end face of the blade tip process boss machined in the second step is grasped and positioned through a clamping jaw; and sixthly, the molded surface of the blade body is machined. The method is simple in operation process and can be quickly popularized to machining of blade profiles of the same type; and meanwhile, the blade molded surface processe