Spraying pipe cavity surface segmented machining and polishing process

The invention belongs to the technical field of special molding cavity machining, and in particular, relates to a spraying pipe cavity surface segmented machining and polishing process. The process comprises the following steps: firstly, a spraying pipe cavity surface is segmented according to structural characteristics of the spraying pipe cavity structure; the spraying pipe cavity surface includes a large-caliber horn port molding cavity, a small-caliber horn port molding cavity, a small-caliber thin wall molding cavity and a hourglass-shaped complex molding cavity; then, the segmented spraying pipe cavity surface is respectively machined; and finally, the machined spraying pipe cavity surface is polished. The process manufactures a special clamping tool through reasonable segmentation, solves the cutter shaking difficulty in machining of thin-wall and large-diameter-change molding cavities, and guarantees the size deviation to be controlled within 0.01 mm; the process optimizes machining parameters to cont