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High Rate Production of laminar Wing Covers- With modular “Shoe Box” tooling

Kleineberg, Markus (2013) High Rate Production of laminar Wing Covers- With modular “Shoe Box” tooling. In: 4th Machining Innovations Conference. 4th Machining Innovations Conference, 18.-19. Sep. 2013, Hannover.

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Abstract

The “Shoe Box” Approach Efficient wing structures are essential to ensures competitiveness of future aircraft concepts and composite materials provide a wide range of technological options that can be utilized to optimise the wing for its application scenario. The developed “Shoe Box” upper wing cover structure is fully integrated and based on toughened prepreg for the skin and the backing structure. In case of the skin laminate a robot based multi head ATL (Automatic Tape Laying) concept has been chosen because it allows to increase the lay-up rate without exceeding a critical lay-up speed and limits the investment costs because flexible standard robots and rail systems can be used. To realize the stringer/rib cap backing structure box like tooling modules are wrapped with prepreg fabric and combined in a way that stringers and rib caps are formed. To provide the required consolidation pressure for the prepreg a material mix of aluminum and Invar is used where the thermal expansion of the aluminum compresses the prepreg stack. To provide maximum geometrical precision each tooling module is mechanically linked to an Invar base plate. Since it is a known problem that heating and cooling of massive tooling constructions is critical for the cycle time hollow tooling modules where applied. To further increase heat-up and cool down rates the air flow of the autoclave was lead through the tooling modules. Finally Skin lay-up and backing structure lay-up together with their dedicated tools are combined. The resulting tooling set-up is an partly elastic closed autoclave mould without vacuum bags. High precision GOM ATOS measuring equipment has been used to prove the excellent geometrical accuracy.

Item URL in elib:https://elib.dlr.de/84502/
Document Type:Conference or Workshop Item (Poster)
Title:High Rate Production of laminar Wing Covers- With modular “Shoe Box” tooling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kleineberg, Markus Markus.Kleineberg (at) dlr.deUNSPECIFIED
Date:18 September 2013
Journal or Publication Title:4th Machining Innovations Conference
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Laminar Wing, Integral Structure, ATL, AFP
Event Title:4th Machining Innovations Conference
Event Location:Hannover
Event Type:international Conference
Event Dates:18.-19. Sep. 2013
Organizer:Machining Innovations Network
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Composite Technology
Deposited By: Kleineberg, Markus
Deposited On:11 Nov 2013 20:11
Last Modified:08 May 2014 23:25

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