Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A C.12 EXHIBIT E – EXAMPLES OF SEMI-AUTOMATED RE-MASTERING. The process of semi-automated re-mastering proceeds as follows: 1. 2D sketches and parameters are translated. 2. Feature recipes are translated by matching, mapping, recognition, and decomposition. 3. Geometry and topology (B-rep) is natively created in target CAD system. 4. Original and translated geometry are compared. 5. If geometry is not identical, the file is sent to a skilled CAD operator for manual repair and completion. 6. Parts are checked for quality and compared with original. Feature matching:
The sending and receiving systems each contains conceptually similar feature types, such an extruded sketch. Figure 24. Feature extruded from a sketch in the original system. Figure 25. Translator matches the original feature to a conceptually identical feature in the receiving system. Feature mapping: A feature of one type is mapped to a different type of feature to produce the same shape. For example, a solid primitive of a cylinder can be mapped to an extrusion of a circular sketch in a system that lacks cylindrical primitives: 157