|Team Members||Problem Statement||Product Description|
Evaluation of the Adjustable Joggle Die Set was directed at determining if the die set met the objective of producing repeated joggles within the ± 0.010 inch tolerance on 99% of the joggles attempted.
There are two dimensions on a joggled stringer that must meet the ± 0.010 inch tolerance in order for the stringer to be useable. These dimensions are the joggle transition length and the joggle depth. The figure shown below depicts the profile of a joggled stringer and the location of geometry of the measured dimensions.
The results of the design evaluation testing showed that the adjustable die set met the ± 0.010 inch tolerance for both transition length and joggle depth with 99% certainty.
In addition to the tolerance and certainty evaluation qualitative testing of the joggle stringers was done with die penetrant tests, see Figures 1 and 2 below.
|Figures 1: Control Stringer, intentionally cracked for visualization||Figures 2: Quantitatively and Qualitatively tested stringers. All of the stringers joggled passed the die penetrant test.|
Over the course of the design of the Adjustable Joggle Die Set the DFMEA showed the following to be the major issues of concern:
The completion machining and design evaluation testing eliminated the first two DFMEA major issues of concern and produced the following issues of concern: