Machining process and step generation method based on three-dimensional CAD model

The invention discloses a machining process and step generation method based on a three-dimensional CAD model. The machining process and step generation method comprises the steps that a target view of the three-dimensional CAD model is obtained; identifying the target view, and obtaining a contour wireframe and an internal wireframe in the target view; and the machining procedures and the machining steps of the part are determined according to the internal wireframe and the contour wireframe. In the aspect of process design of machining products based on a three-dimensional CAD model, after a machining process scheme formed by procedures and steps reaches certain data accumulation, corresponding data models and software tools can be established, and information extraction of the three-dimensional CAD model of parts is combined, so that the machining process design of the machining products is realized. And automatic generation of machining procedures and steps based on the three-dimensional CAD model of the