Engine Titanium Consortium - Center for Nondestructive Evaluation ...

to firmly fixture and work with a number of these rotating drivers. Schematics or actual rotating
drivers were made available for this design. The probe translation device will be adaptable to
different engine part numbers. Figure 2 shows a schematic of the preliminary design of the probe
translation device. The following requirements were imposed during the design process:
1. Fixtured alignment to control wobble of probe while translating through a part
2. Fine X-Y plane adjustment to center probe within bolt hole diameter
3. Machine control of probe travel through bolt holes by means of selectable fixed transverse
speeds of zero, 0.100, and 0.200 inches/second in a helical scan pattern
4. Rapid adjustable automatic translation retraction to a start next scan position
5. Scan limit switch to prevent excess travel of probe
6. Minimum of three inches of probe translation travel
7. Slip clutch to prevent burn-out of translation motor
8. Use of exchangeable bolt-on adapter plates for fit to specific parts/bolt hole patterns
9. Adaptability to Uniwest probe rotating driver, Roman Elotest, Foerster, Zetec, etc as provided.
10. There can be no electrical interference caused the probe translation device on the eddy current
inspection process including data acquisition.
11. Manufacturing cost less than $10,000
Part Adapter Plate: In order to adapt the proposed bolt hole scanning system design to various
parts and for the inspection of each hole, the ability to manually lift the instrument and secure it for
the next bolt hole must be present. This will be accomplished through an exchangeable adapter
plate designed for that purpose. These adapter plates shall bolt to the bottom of the translation
device. To precisely adjust the eddy-current probe within a bolt hole, a fine X-Y adjustment that can
also lock the probe into the correct position within the hole is provided. Figure 3 shows an example
of an adapter plate that is currently in use in production. Our plan includes the design and
manufacturing of two such adapter plates for pre-selected industry applications. The selection of
these applications in underway and once finalized the design of these adapter plates will be
completed.
Quarterly Report – January 1, 2002 –March 31, 2002
print date/time: 6/6/2002 - 8:39 AM – Page 73