T700 Turbine Nozzle Manufacturing Technology Program. Computer Assisted EDM. Cooling Flow Measurement by IR. Automated Optical Area Measurement

摘要

This program consisted of three separate tasks relative to the improvement of T700 turbine nozzle manufacturing process. (1) Computer Assisted EDM - This report documents a series of four experiments performed at the Manufacturing Technology Laboratory in Evendale to assess the potential benefits of a computer assisted (programmable) varying EDM power supply to reduce the time required for this machining operation. The experiments revealed a parameter profile which is optimum for this machining operation and will reduce the time required for machining trailing edge cooling holes. (2) Cooling Flow Measurement by Infrared Inspection - This report describes the procedures developed, equipment assembled, and results obtained in a study performed by General Electric Aircraft Engine Business Group (GE-AEBG) for the United States Army to apply infrared inspection to T700 nozzle segments for the purpose of detecting blocked airfoil surface cooling holes and for the purpose of estimating cooling flow rate. (3) Automated Optical Area Measurement - This report presents the results of a joint effort by General Electric Aircraft Engine Business Group and Bausch & Lomb Analytical Systems Division, for the U.S. Army, to determine the feasibility of using a computerized image analysis technique to measure the exit areas of T700 stage 1 turbine nozzles.