Tungsten alloy swaging rod is made of tungsten alloy rod through calcinations. The normal method used in the processing are extruding, forging and sintering. After calcinations, tungsten alloy swaging rod has higher ductility, toughness and tensile strength than tungsten alloy rod, so it can be used for a longer time. Tungsten alloy swaging rod has been widely used for GBU-28.

GBU-28 is a 5,000-pound (2,268 kg) laser-guided "bunker busting" bomb nicknamed "Deep Throat" produced originally by the Watervliet Arsenal, Watervliet, New York. It was designed, manufactured, and deployed in less than three weeks due to an urgent need during Operation Desert Storm to penetrate hardened Iraqi command centers located deep underground. Only two of the weapons were dropped in Desert Storm, both by F-111Fs.

Tungsten alloy swaging rod has high density and high hardness which can help GBU-28 penetrate the rock formation and destroy underground bunker.



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The  bucking bars made of tungsten resulted in significantly less vibration measured at the bucking bar when compared to the other two bucking bar materials (cold rolled and stainless steel). The >90% tungsten bar resulted in a 34% decrease in the resultant weighted acceleration when compared to using the cold rolled bar, and a 37.5% decrease when compared to using the stainless steel bar. Additionally, the >90% tungsten bar resulted in 2.8% less vibration transmission than the 90% tungsten bar, although this difference was not statistically significant. The magnitude of the weighted resultant acceleration indicates how fast the bucking bar is “bouncing” or moving as the energy is transferred from the rivet gun through the rivet to the bucking bar. Thus, a bucking bar that is accelerating less would be expected to result in lower grip force to control the bucking bar. Thus, when using bucking bars of the same size, the heavier tungsten bars were superior to the traditional steel bucking bars in terms of dampening vibration transmission without the added cost of increased muscle force to control the bars during riveting. This may also result in a positive health effect as the tungsten bucking bars resulted in an increase in the estimated duration for 10% of the exposed population at the measured acceleration levels to show symptoms of finger blanching (ISO 5349) of at least 49% and 64% when compared to the cold rolled and stainless steel bars, respectively.

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Tungsten alloy swaging rod is made of tungsten alloy rod through calcinations. The normal method used in the processing are extruding, forging and sintering. After calcinations, tungsten alloy swaging rod has higher ductility, toughness and tensile strength than tungsten alloy rod, so it can be used for a longer time. Tungsten alloy swaging rod has been widely used for GBU-57.

GBU-57 is a U.S. Air Force, precision-guided, 30,000-pound (13,608 kg) "bunker buster" bomb.[2] This is substantially larger than the deepest penetrating bunker busters previously available, the 5,000-pound (2,268 kg) GBU-28 and GBU-37.

Tungsten alloy swaging rod has high density and high hardness which can help GBU-57 penetrate the rock formation and destroy underground bunker.



Tungsten Heavy Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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Recently, bucking bars made of tungsten have been utilized for some riveting tasks at a local
aircraft manufacturer, where subjective reports from the employees suggested less vibration was
transmitted to the hands. However, since the tungsten bars weigh approximately 2.3 times more
than the steel bucking bars of the same size and shape, the company was reluctant to implement
tungsten bucking bars on a full scale. While the increased mass of the tungsten bar may be an
advantage as far as dampening the vibration, the effect on the hand grip exertion levels was
unknown. Therefore, the overall objective of this study was to perform a field evaluation to quantify
and compare the vibration transmission and grip muscle activity characteristics when using bucking bars of the same size and shape, but made of different materials.

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