Development of automated production line for cutting sheets and rolls ofВ95пчАМ and 1163АМaviation alloys

Аuthors

Markovtsev V. A.^1*, Filimonov V. I.^2**, Markovtseva V. V.^2***

1. National Institute of Aviation Technology, NIAT, 34, Vrach Mikhailov str., Ulyanovsk, 432057, Russia
2. 2Ulyanovskiy State Technical University, 34, Engels str., Ulyanovsk, 432057, Russia

*e-mail: niat@mv.ru
**e-mail: omd@mf.ulstu.ru
***e-mail: valeria2505@yandex.ru

Abstract

The quality of aviation profiles, which are manufacturedby bendingfrom clad sheet blanks ofaviation alloys, largely depends on the width of the original piece.Obtaining minimum bend radii and thickening of the corner areas of bent profiles helps to increase thestiffnessof the structure of the aircraft fuselage frame.Therefore the paper considers the theoretical basis forthe development of a production line for the longitudinal and transverse cutting of the sheets of1163АМand В95пчАМ(the equivalentof 7075) aluminum alloys.After cutting the strips are usedfor manufacturing of aviation detailsby bending.
The paper presents the results of theoretical studies and calculations, which were aimed at determining the required width of the original piece. Those include the results of theoretical studies of the blankworkpieceparameters, which are presentedin the form of the appropriate formulas and graphs. These formulas and graphs can be usedduring the development of the technology for manufacturing of profiles by bendingfrom clad sheet aviation alloyblanks.
Principalresultsarethefollowing: the theoretical research has formed a basis that helped to develop the special equipment and tooling for longitudinal and transverse cutting of clad aluminum sheets and rolls.
The developed automated cutting complex allows to carry out the longitudinal and transverse cutting of strips from sheets and rolls of В95пчАМ and 1163АМaircraft aluminum alloys.The complex provides the high quality of edges and minimum width tolerances of the blank workpiece. Thisallows to attainthe width of theobtained strip that would be as close to the width of the flat pattern as possible.
Thecutting complexfacilitatesthe production of high quality aviation profiles by bending in accordance with theindustry standards. This in turn helps to increase the stiffness of the aircraft fuselage frame and reduceits weightby reducing the number of bended profiles and fasteners.

Keywords:

cutting, aluminum alloys, stringer, fuselage frame, aircraft

References

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3. Maznev V.N. Aviation engineering, 1983, no. 2, pp.6-8.
4. Ilyushkin M.V., Markovtsev V.A., Baranov A.S., Volkov A.A. Materialy 12 Междунароdnoi nauchno-prakticheskoi konferentsii «Sovremennye tehnologii v mashinostroenii», Penza, 2008, pp. 86-89.
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