Method for generating machining cutter path for curved deep cavity surface

A method for generating a machining cutter path for a curved deep cavity surface, comprising following steps:

• extracting a boundary contour of a curved deep cavity surface and generating an initial cutter path:
• completing extraction of the boundary contour of features of the curved deep cavity surface, and generating the initial cutter path based on a method of isometric offset from the boundary contour;
• considering a machine tool limitation constraint:
• inversely deriving a corresponding feasible region of cutter axis vector based on a swing angle range of each corresponding rotating shaft of a machine tool selected;
• considering a non-interference constraint:
• considering global interference and local interference of a cutter during machining, performing non-interference determination by considering the cutter having a cutter holder clamping the cutter as a whole, and determining a feasible region of cutter axis vector with consideration of the non-interference constraint;
• considering a non-chattering constraint:
• obtaining an intersecting area of the cutter and workpiece, constructing a dynamic model, constructing a stability diagram by using a full-discrete method, and determining a feasible region of cutter axis vector with consideration of the non-chattering constraint;
• determining a feasible region of cutter axis vector for each cutter location point:
• finding an intersection of the feasible region of cutter axis vector obtained with consideration of the machine tool limitation constraint, the feasible region of cutter axis vector obtained with consideration of the non-interference constraint and the feasible region of cutter axis vector obtained with consideration of the non-chattering constraint, to obtain an actual feasible region of cutter axis vector for each cutter location point;
• and
• optimizing a shortest path and outputting an optimized cutter path:
• determining a cutter axis vector corresponding to each cutter location point from the feasible region of cutter axis vector based on a Dijkstra shortest path fairing method, generating a cutter location file, selecting corresponding post-processing according to an actual machine tool and outputting a final optimized cutter path.