Role of Numerical Control Design in the computer aided design/manufacturing interface at Sikorsky

The evolution of Numerical Control Design (Engineering) function from its beginnings in graphic lofting/lines layout/master dimensions to its current pivotal position within the aircraft design/manufacturing process is described. The development and application of many sophisticated computerized hardware and software systems currently in operation are outlined. These include interactive graphics, automated drafting and digitizing, demand batch processing and a greatly enhanced APT III system for design/drafting/lofting. The integration of sheet metal layout and template/tool design within the Numerical Control Design function is shown resulting in the output of a wide variety of tool drawings for downstream manufacturing requirements which are illustrated. How these improved interfaces with preliminary and production design and with manufacturing operations and quality assurance coupled with the increased efficiencies of the above systems have resulted in substantial cost and lead time savings in the development of prototype and production aircraft are demonstrated.