A Rear Shell Jig (Fourth Series)

Fourth Operation: Equipment used: VMC850 (same as the first operation) Part to be processed: After mounting the other half of the bearing bush on the E reference surface, process the C and D reference holes, end face, and boss surface-related features. Clamping principle: Using the installation joint surface processed in the first operation as the clamping surface, center using the two 2-φ8 pin holes in the F-F view, with one side and two pins. Plan requirements: Process two pieces in one clamping: First piece (first station) processes the C reference and related features; second piece (second station) processes the D reference and related features, bore the C and D references (bearing bush holes) in one pass, ensuring the tool does not interfere in the middle cavity.