The milling of airframe components with low rigidity: A general approach to avoid static and dynamic problems

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dc.contributor.authorHerranz, S.
dc.contributor.authorCampa, F. J.
dc.contributor.authorDe Lacalle, L. N.López
dc.contributor.authorRivero, A.
dc.contributor.authorLamikiz, A.
dc.contributor.authorUkar, E.
dc.contributor.authorSánchez, J. A.
dc.contributor.authorBravo, U.
dc.contributor.institutionSG
dc.date.issued2005-11
dc.description.abstractAt present, airframes are mainly composed of monolithic components, instead of small parts joined using welding or riveting. Ribs, stringers, spars, and bulkheads can be included in this category. After milling, they are assembled and joined to the aircraft skins, which have also been milled. The aim of these parts is to obtain a good strength-weight ratio, owing to their homogeneity. The milling of a monolithic structural part implies removing up to 95 per cent of the weight from the raw block material. Therefore, the main objective is to achieve the highest removal rate possible. However, conditions required to achieve this (high feed, large depth of cut) in milling imply high cutting forces, which in turn induce part deflection or vibrations in those zones (thin walls and floors) where stiffness is not sufficiently high. These static and dynamic problems often lead to inaccuracy of geometry, roughness, and possible damage to the machine spindle. This paper proposes a working methodology for efficient process planning, based on previous analysis of the static and dynamic phenomena that can occur during high-speed cutting. This methodology provides several steps that can be taken in order to minimize the bending and vibration effects; suggests optimal monitoring methods to detect process instability; and describes the best way to tune the cutting conditions and chip load, by means of simulation at different machining stages. In this way, the reliability of aeronautical production significantly increases. The global approach presented in this paper has been applied to two test pieces and two real parts, which were milled without suffering either static or dynamic problems.en
dc.description.statusPeer reviewed
dc.format.extent13
dc.identifier.citationHerranz , S , Campa , F J , De Lacalle , L N L , Rivero , A , Lamikiz , A , Ukar , E , Sánchez , J A & Bravo , U 2005 , ' The milling of airframe components with low rigidity : A general approach to avoid static and dynamic problems ' , Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture , vol. 219 , no. 11 , pp. 789-801 . https://doi.org/10.1243/095440505X32742
dc.identifier.doi10.1243/095440505X32742
dc.identifier.issn0954-4054
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=27744467486&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofProceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywordsAeronautical components
dc.subject.keywordsAirframe
dc.subject.keywordsHigh-speed milling
dc.subject.keywordsMachining
dc.subject.keywordsMonolithic parts
dc.subject.keywordsMechanical Engineering
dc.subject.keywordsIndustrial and Manufacturing Engineering
dc.titleThe milling of airframe components with low rigidity: A general approach to avoid static and dynamic problemsen
dc.typejournal article
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