Collision pair prediction method and system based on motion trend of numerical control machine tool and application

The invention belongs to the field of numerical control machine tool collision detection, and particularly discloses a collision pair prediction method and system based on the movement trend of a numerical control machine tool and application, and the method comprises the steps: determining the movement direction of each assembly in the machine tool according to a movement instruction of the numerical control machine tool; pairing the components to obtain a plurality of collision pairs; building a bounding box for each component based on the motion direction of the component; each collision pair is judged as follows: whether bounding boxes of two assemblies in the collision pair are intersected or not is judged, and if yes, the collision pair is added into a directional collision pair subset; otherwise, marking the collision pair as an invalid collision pair; and determining a priority relationship of the components according to the spatial positions of the components, and screening out effective collision pa