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首页> 外文期刊>DVS-Berichte >Spinforming of friction stir welded AA 2219 circular blanks for ARIANE 5 main stage tank bulkheads
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Spinforming of friction stir welded AA 2219 circular blanks for ARIANE 5 main stage tank bulkheads

机译：ARIANE 5主级液舱舱壁的搅拌摩擦焊AA 2219圆形毛坯的旋压成型

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摘要

The tank of the cryogenic Ariane 5 main stage (EPC) has a diameter of 5.4 m and a length of 24 m. It serves as a reservoir for 1301 liquid oxygen and 251 liquid hydrogen. The tank is cylindrical with a bulkhead at each end and a further one in the interior of the tank, separating the two propellant components. Due to the cryogenic conditions the aluminum alloy AA2219 is applied. There is worldwide only one supplier, who is able to supply large sheet metals of the required size to produce non-segmented tank domes with a diameter of more than 5 m. Thus, at the present design of the Ariane 5 there are eight segments, which are spherically formed before being welded to one spherical dome. To obtain a complete Tank Bulkhead (Fig. 1), a Y-Ring and a Manhole-Flange or an End-Cap are finally welded to the dome. The presently applied welding technology for welding the segments is sensitive and can cause defects e.g. pores, cracks or lack of fusion. Accurate weld preparations are necessary to avoid these defects.
机译：低温Ariane 5主级（EPC）的水箱直径为5.4 m，长度为24 m。它用作1301液态氧和251液态氢的储存器。坦克是圆柱形的，在每一端都有一个隔板，在坦克的内部还有一个隔板，将两个推进剂组分分开。由于低温条件，使用了AA2219铝合金。全球范围内只有一家供应商，能够供应所需尺寸的大型钣金，以生产直径大于5 m的无分段储罐穹顶。因此，在阿丽亚娜5号的当前设计中，有八个部分，它们在被焊接到一个球形圆顶之前被球形地形成。为了获得完整的坦克舱壁（图1），最后将Y型圈和人孔法兰或端盖焊接到圆顶上。当前应用的用于焊接段的焊接技术是敏感的，并且可能导致缺陷例如毛孔，裂缝或缺乏融合。为了避免这些缺陷，必须进行准确的焊接准备。

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