The invention discloses an automatic generation method of a plunge milling toolpath for corner features, and belongs to the technical field of CAD (Computer-Aided Design) / CAPP (Computer-Aided Process Planning) /
CAM (Computer-Aided Manufacturing). The automatic generation method comprises the following steps: firstly, conducting the pretreatment such as part selection, part feature information read-in and the like; secondarily, obtaining geometric surfaces needed in corner
processing from the part feature information, and automatically calculating the corner plunge milling area geometric auxiliary point, the axial corner geometric auxiliary point and the
plunger milling generation geometric auxiliary point according to information such as the
plunger milling
processing redundancy, the
radius of a
cutting tool in the former process or work step as well as the rough
processing redundancy and the like; and finally, generating the
plunger milling tooth-paths of all part corners through the auxiliary points automatically. The plunge milling tool-paths for corners, generated through the invention, are high in speed and high in accuracy rate, and can process a corner in a large processing area, a corner containing scattered surfaces, a five-axis corner, and a corner of which the proximal surface is a big-curvature side surface, so that the method solves the problem that the manual corner plunger milling
programming process is trivial and complicated and low in efficiency. Through the invention, a good effect on plunger milling of corners of an aircraft structural part can be obtained.