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Friction pull plug welding: dual chamfered plate holeFriction Pull Plug Welding (FPPW) is a solid state repair process for defects up to one inch in length, only requiring single sided tooling (OSL) for usage on flight hardware. Early attempts with FPPW followed the matching plug/plate geometry precedence of the successful Friction Push Plug Welding program, however no defect free welds were achieved due to substantial plug necking and plug rotational stalling. The dual chamfered hole has eliminated plug rotational stalling, both upon initial plug/plate contact and during welding. Also, the necking of the heated plug metal under a tensile heating/forging load has been eliminated through the usage of the dual chamfered plate hole.
Document ID
20080004509
Acquisition Source
Marshall Space Flight Center
Document Type
Other - Patent
Authors
Coletta, Edmond R.
Cantrell, Mark A.
Date Acquired
August 24, 2013
Publication Date
May 15, 2001
Subject Category
Mechanical Engineering
Report/Patent Number
Patent Number: US-PATENT-6,230,958
Patent Application Number: US-PATENT-APPL-SN-547800
Funding Number(s)
CONTRACT_GRANT: NAS8-36200
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-6,230,958
Patent Application
US-PATENT-APPL-SN-547800

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