Solar Turbines Inc.

James B Sperling

Mario Eugene Abreu

Virendra M Sood

Douglas C Rawlins

The present method of making a workpiece having a plurality of holes defined therein includes the plurality of holes defining a specific flow at a specific flow condition. The method of making the plurality of holes includes generally the steps of forming a first portion of holes having a first preestablished hole cross-sectional area being defined by a predetermined flow characteristic value of the first preestablished hole cross-sectional area at the specific flow condition; a cavity being formed; positioning a flow establishing device in communication with the cavity; positioning a flow measuring device in operative relationship with the flow establishing device; actuating the flow establishing device and establishing a flow through the first portion of holes; monitoring the flow; comparing the flow with the predetermined flow characteristic value; determining a flow requirement of a second portion of holes based on an accumulative predetermined flow characteristic value of the first and second portions of holes and the measured flow of the first portion of holes; conforming the forming device to a second predetermined hole cross-sectional area and forming the second portion of said plurality of holes having the second predetermined hole cross-sectional area; and repeating the aforementioned steps successively for the remaining portions of the plurality of holes until the required number of holes in the workpiece have been formed.

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El Cajon, CA, United States of America

James B Sperling