Original Date: 05/08/1995
Revision Date: 01/18/2007
Information : Machine Center Feature-Based Process Coding Methodology
McDonnell Douglas Aerospace (MDA)-St. Louis extends group technology part classification efforts with the Machining Center Feature-Based Process Coding Methodology to include process information. The objective of this program is to provide feedback to designers to improve detailed part design.
The methodology is based on an eight alpha/numeric character process code that is critical to communicating the manufacturing capability for a given part to MDA-St. Louis customers and engineering personnel. A process capability feature model is conveyed to engineering by identifying design form features such as slot, fillet, stiffener, and hole on a part, and attaching manufacturing information to that form feature. The process code identifies the center that will fabricate the part, the specific machine, tolerance range, basic process, material identifier, tool application, and associated design form feature.
The process code provides clear language, exploits the advantages of feature-based design, and assigns processes by similarity of part fabrication including process capability machine selector. The process code has been incorporated in a variety of in-house process control efforts such as the statistical process control system.
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