High Flushness Installation of Countersunk Fasteners Northern Ireland Technology Centre

Format:

Conference/Event

Author/Creator:

Morgan, Morgan, author.

Contributor:

Higgins, Colm

Jin, Yan

McClory, Caroline

Murphy, Adrian

Conference Name:

SAE 2016 Aerospace Manufacturing and Automated Fastening Conference & Exhibition (2016-10-04 : Bremen, Germany)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

Aerospace structures are typically joined to form larger assemblies using screw lock or swage lock fasteners or rivets. Countersunk fasteners are used widely in the aerospace industry on flying surfaces to reduce excrescence drag and increase aircraft performance. These fasteners are typically installed to a nominal countersink value which leaves them flush to the surface before being locked into position.The Northern Ireland Technology Centre (NITC) at Queen's University Belfast has developed and demonstrated two processes which enable high tolerance flush fastening of countersunk fasteners:Flushness values well within the allowable tolerances have been demonstrated for both Flush Install and Fettle Flush processes. The Flush Install process uses a physics based, experimentally verified constant ζ' based on the material types and thickness of the stack being assembled. The Fettle Flush process uses a proprietary toolpath to ensure low machining forces, optimum flushness and excellent surface finish. Both processes were developed by the NITC to TRL4 before transferal to the Manufacturing Technology Centre (MTC) in Coventry for use within a TRL5 application, a Ground Based Demonstrator (GBD) wing at the MTC which further demonstrated the two processes

Notes:

Vendor supplied data

Publisher Number:

2016-01-2109

Access Restriction:

Restricted for use by site license