Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1990-07-25
1992-01-28
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Assembling or joining
29272, 29280, 29282, 72393, B21D 3904
Patent
active
050833634
ABSTRACT:
The present invention provides a method of installing a grommet within an opening in a wall of composite material. An opening (10) is formed in a wall of composite material (12). A countersink (20) is formed at one end of the opening (10). A grommet (22) is placed into the opening (10). A split sleeve (28) is placed on the small diameter portion (30) of a mandrel (32) which is attached to a power puller (36). The mandrel (32) with the split sleeve (28) is placed through the opening (10) and a grommet (22). The power puller (36) is then operated to pull the mandrel (32) back through the opening (10) and the grommet (22) thereby expanding the split sleeve (28) which in turn provides for the radial expansion of the grommet (22). During the radial expansion of the grommet (22), ends of fibers (16) are forced into the surface of the grommet (24 ). After the mandrel (32) has been pulled all the way through the split sleeve (28) both it and the split sleeve (28) are removed from the grommet (22). This leaves the grommet (22) securely fastened within the opening (10) in the composite wall (12).
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Bolstad Roger T.
Copple Charles M.
Easterbrook Eric T.
Landy Michael A.
Ransom Joy Sarah
Barnard Delbert J.
Dungba Vo Peter
Fatigue Technology Inc.
Gorski Joseph M.
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