Practical methods of computer-aided flat pattern development for sheet metal components

Prasad, K. Satya; Selvaraj, P.

doi:10.1080/00207540410001691893

Cited by 11 publications

(10 citation statements)

References 6 publications

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“…Here, we present an overview of these challenges, algorithms, techniques, and our documented experiences relevant to aerospace technology in general and in-house projects like LCA, in particular, complementing our publications [5][6][7]. Insofar as technologies of aircraft SMC manufacturing automation is concerned, we had to go all alone.…”

Section: Summary Of Concurrent Developmentsmentioning

confidence: 99%

“…The scope of the present paper is to provide an overview of the technological advances concluding the current series of publications giving a complete know-how, commencing with the publication of basic research on practical methods, and survey of literature pertinent to contemporary research and development of SMC manufacture presented in [5]. This is followed by the presentation of considerations on the design of the Production Loft Generation System (PLGS) in [6] and some exclusive aspects and key algorithms of PC-based FP activity related to complex SMCs (without any flat surface, with double curvatures, and with several design and production features) are brought out in [7].…”

Section: Review Of Available Technologiesmentioning

confidence: 99%

“…1) Symmetry processing (illustrated in the section titled Illustrations of Production Lofts): To speed up the FP development process; if a model is symmetric about an axis or both, then only a [5,6] 13 and 14 Bend correction correction formula incorporating surface model selection as well as direction of bend: BC kt 1 2 t 1 2 ts1 s2 as per parametric definitions in [5] (created by the author during feasibility study in May 1989) [5] 13-27…”

Section: Improvisations In Cad Operational Efficaciesmentioning

confidence: 99%

“…Recursive division algorithm number of divisions and spacing between them defined using recursive logic for efficiency and effectiveness in controlling accuracy [5] 13-27…”

Section: Improvisations In Cad Operational Efficaciesmentioning

confidence: 99%

“…The entire parametric definitions and nomenclature relevant to FPD and loft generation technologies are illustrated in earlier publications [5][6][7]. Also, the entire numerical data needed for the systems has been drawn from the lofting manuals of HAL and through continuous update during the production of new aircraft.…”

Section: Sequence and Strategies Of Developing A Production Loft Genementioning

confidence: 99%

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Automated Aircraft Sheet Metal Component Production Technologies

Prasad

Selvaraj

Ayachit

et al. 2007

Journal of Aircraft

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This article comprehensively presents an overview of the technological advances in automated aircraft sheet metal component production technology developments due to the initiative by the Aeronautical Development Agency, Ministry of Defense, Government of India, since 1989 in collaboration with the Indian Institute of Technology, Bombay. Commencing with a modest computer-aided flat pattern development software system suitable for a class of sheet metal components, this activity after several stages of development has now resulted in the development of fullfledged, personal-computer-based graphical interactive, three-dimensional application flat pattern development and automated production loft generation system. This research, encompassing the practical methods (exclusively developed for flat pattern software), literature survey, development of key algorithms suitable for designing a system for automated loft generation for a variety of surfaces with complex geometric features characteristic of aircraft sheet metal components with the aid of a wide choice of surface model creations, and testing and validation (carried out through an associated aircraft factory, Hindustan Aeronautics Limited), is now being published through four fulllength papers concluding with the present paper. In fact, comprehensive illustrations of production lofts sampled from over thousands of parts used in the factory pertinent to the Indian Light Combat Aircraft (termed as Tejas) and other projects like Advanced Light Helicopter (termed as Dhruv) sheet metal components are included here to provide insight into these developments, and also to provide a glimpse of the success of the mission of indigenous automated aircraft sheet metal component manufacture.

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Section: Summary Of Concurrent Developmentsmentioning

confidence: 99%

Section: Review Of Available Technologiesmentioning

confidence: 99%

Section: Improvisations In Cad Operational Efficaciesmentioning

confidence: 99%

“…Recursive division algorithm number of divisions and spacing between them defined using recursive logic for efficiency and effectiveness in controlling accuracy [5] 13-27…”

Section: Improvisations In Cad Operational Efficaciesmentioning

confidence: 99%

Section: Sequence and Strategies Of Developing A Production Loft Genementioning

confidence: 99%

See 3 more Smart Citations