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- W2066591907 abstract "Production line techniques of nondestructive testing have been streamlined and automated with the use of a customized Newport Research Corporation Holographic Inspection Station. The nondestructive evaluation of the glue joints in XM785 rocket motor bodies has been performed totally by remote control; the operator requires no specialized knowledge of part handling or of holographic techniques. The holocamera was modified with a pneumatic part-handling fixture which could rotate a part to produce 12 real-time holograms of the rocket motor body in different positions. By heating the sample with a remotely controlled heat gun, the samples could be checked for voids in the bonding layer of silicon-based adhesive between the insulating phenolic liner and the titanium rocket motor body. Defects greater than 1/4 in diameter have been successfully located by observing the fringe pattern produced by this method. The fringe pattern produced is a characteristic bull's-eye pattern, quite different from the solid rigid body fringes produced in places where the glue is successfully joining the inner liner to the massive titanium structure. The results were repeatable during sample reheatings, and suspected defects on the edges of the visible region could be reexamined by rotating the sample along its axis to a better viewing angle. During evaluation, the fringes were viewed in real time by a video camera focused through the thermoplastic plate onto the sample, and recorded by a VCR for off-line examination. Still photos could be taken either by replacing the video camera with a 35 mm camera, or by obtaining a hard copy from the VCR unit." @default.
- W2066591907 created "2016-06-24" @default.
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- W2066591907 date "1989-05-25" @default.
- W2066591907 modified "2023-09-23" @default.
- W2066591907 title "An Integrated Approach To Production Line Nondestructive Testing Using A Customized Newport Research Corporation Holographic Inspection Station" @default.
- W2066591907 doi "https://doi.org/10.1117/12.951465" @default.
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