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Title: Development Of The Peen Forming Process For Spherical Shaped Components
Author: Hornauer, K.P. and Kohler, W.
Source: Conf Proc: ICSP-4, (p.585-594)
Publication year 1990
Document number: 1990020
Number of pages: 10
Abstract:
The main tank H-155 of ARIANE 5 containing cryogenic propellants is built of weldable A1-alloy 2219. With its size (diameter 5.4 m) the tank exceeds all tanks for launchers
built in Europe for the time being.
F
or forming the spherical shaped segments of the tank bulkheads of the
ARIANE 5 launcher, different forming processes, like spin forming, stretch forming and peen forming were investigated.
T
he reasons, which have led to the application of the peen forming
process for forming the segments, will be described in the following paper; further, the development of the peen forming strategy and the process parameters will be referred
to.
W
ith respect to parameters and contour measurement, great efforts were
required to reach the desired high form accuracy of the components. The expectations on the formed material have been very high and the properties achieved in the segments
will be reported in this paper. For the forming process a new computer-controlled peen forming machine was built and qualified. Finally the technique and the possibilities
of this machine will be explained briefly.
Descriptors: Peen forming, Spherical shaped components, Forming methods, A1-alloy 2219, Peening parameters, Peening strategy, Material Properties, Residual stresses, Peen
forming machine
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This page last revised: 04/24/2008