The bucking bar includes a housing and a driven member movable with respect to the housing. The worker using the bar holds it with the driven member pressed against one end of the rivet. When blows are delivered from the hammer through the rivet to the bar, an appropriate reaction force is generated automatically by mechanisms within the bar. These mechanisms include at least a first pressure chamber and an exhaust port for releasing pressure from the pressure chamber to the atmosphere. By controlling the flow of air through the pressure chamber, the mechanisms within the bucking bar control the forces acting on the driven member during the recoil and rebound motions. Preferred control mechanisms include a second pressure chamber and a movable shuttle. The shuttle is initially biased in a preferred direction by a biasing element in the form of a coil spring. Subsequent movement of the shuttle is dependent upon the characteristics of the hammer blow. Generation of reaction force within the bucking bar is in turn dependent on the position and motion of the shuttle. Preferably, the shuttle acts as part of several valves controlling the flow of pressurized air into and out of the two pressure chambers. A piston fixed to the end of the driven member acts as part of another valve for controlling the flow of pressurized air into the first pressure chamber.

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Bucking bars are tools used to form bucktails (the head formed during riveting operations) on rivets.They come in many different shapes and sizes, asshown in figure 13-4.Bucking bars are normally made from an alloy steel similar to tool steel. Theparticular shape to be used depends upon the locationand accessibility of the rivet to be driven. The sizend weight of the bar depend on the size and alloy ofthe rivet to be driven. Under certain circumstances,and for specific rivet installations, specially designedbucking bars are manufactured locally. These barsare normally made from tool steel. The portion of the bar designed to come in contact with the rivet has apolished finish.This helps to prevent marring offormed bucktails. Bucking-bar faces must be keptsmooth and perfectly flat and the edges and cornersrounded.

NOTE: Never hold a bucking bar in a viseunless the vise jaws are equipped with protective covers to prevent marring of thebucking bar.A satisfactory rivet installation depends largelyon the condition of the bucking bar and your ability touse it.If possible, hold the bucking bar in such amanner that will allow the longest portion of the bar tobe in line with the rivet. You should hold the buckingbar lightly but firmly against the end of the rivet shankso as not to unseat the rivet head. The inertia of thistool provides the force that bucks (upsets) the rivetand forms a flat, headlike bucktail.

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Military 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 is widely used in military ares. Military tungsten alloy swaging rod can be used for IDAS.

IDAS is a short-range missile currently being developed for the new Type 212 submarine class of the German Navy.

IDAS (based on the IRIS-T air-to-air missile) is primarily targeted against air threats, such as ASW helicopters, but also against small or medium-sized surface vessels or coastal land targets. It is currently being developed by Diehl BGT Defence and HDW, which is a part of Thyssen-Krupp Marine Systems (TKMS), to be fired from Type 212's torpedo tubes. IDAS will be fibre-optic guided and officially has a range of approx. 20 km. Four missiles will fit in one torpedo tube, stored in a magazine. First deliveries of IDAS for the German Navy and operational service are planned from 2014 on.

The IDAS system is also the world's first missile which gives submarines the capability to engage air threats whilst submerged, and the first tube-launched missile that does not emerge in a capsule, but is fired directly from the torpedo tubes.

With the high density and hardness of military tungsten alloy swaging rod, IDAS can penetrate armor and destroy helicopter.



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Military 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 is widely used in military ares. Military tungsten alloy swaging rod can be used for Tomahawk.

The Tomahawk is a long-range, all-weather, subsonic cruise missile. The missile was named after the Native American axe. Introduced by General Dynamics in the 1970s, it was initially designed as a medium to long-range, low-altitude missile that could be launched from a surface platform. It has been improved several times and, due to corporate divestitures and acquisitions, is now made by Raytheon. Some Tomahawks were also manufactured by McDonnell Douglas (now Boeing Defense, Space & Security).

The Tomahawk missile family consists of a number of subsonic, jet engine-powered missiles designed to attack a variety of surface targets. Although a number of launch platforms have been deployed or envisaged, only sea (both surface ship and submarine) launched variants are currently in service. Tomahawk has a modular design, allowing a wide variety of warhead, guidance, and range capabilities.

With the high density and hardness of military tungsten alloy swaging rod, Tomahawk can penetrate armor and destroy warship.



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Military 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 is widely used in military ares. Military tungsten alloy swaging rod can be used for AGM-123.

AGM-123 is a short-range laser-guided missile developed by the U.S. Navy.

AGM-123  is a short range missile intended for precision strikes. It is composed of a Mark 83 bomb, fitted with a Paveway kit, and an attached rocket propulsion system to allow it to be dropped at greater distances from the target. Tandem mounted Mk 78 solid propellant rockets which both fire simultaneously on launch provide propulsion.

With the high density and hardness of military tungsten alloy swaging rod, AGM-123 can penetrate armor and destroy warship.



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Military 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 is widely used in military ares. Warhead of Penguin missile is made of military tungsten alloy swaging rod.

The Penguin missile is a Norwegian passive IR seeker-based short-to-medium range anti-ship guided missile, designed for naval use.

Penguin was originally developed in a collaboration between the Norwegian Defence Research Establishment starting in the early 1960s, with financial support from the USA and West Germany. US Navy test facilities and technical assistance were made available to facilitate development.It was the first NATO AShM with an IR seeker (instead of the commonly used active radar technology) and both hardware and software has been updated since entering series production in 1972.

With the high density and hardness of military tungsten alloy swaging rod, Penguin missile can penetrate armor and destroy warship.



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Military 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 is widely used in military ares. Warhead of AS.34 Kormoran is made of military tungsten alloy swaging rod.

The AS.34 Kormoran is a German-produced Anti-ship missile. The Kormoran (cormorant) uses an inertial guidance system for the midcourse phase, switching to active radar homing during the terminal attack phase. It carries a 165 kg (363 lb) delay-fused warhead, designed for 90mm of penetration prior to detonation. The maximum range is 23 km (~14 miles).

With the high density and hardness of military tungsten alloy swaging rod, AS.34 Kormoran can penetrate armor and destroy warship.



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Thorium tungsten electrode characteristics

Thorium oxide containing tungsten thorium ( thorium dioxide or thoria ) , in the United States it is most commonly used tungsten electrodes , determine other tungsten electrodes have become a standard of good or bad . However, since this has a low level of tungsten electrodes radiological hazards , many users have switched to other options. In general , a 2% thoriated tungsten electrode is a relatively good tungsten electrode having the lowest work function , even when the overload voltages also performed well . Thorium tungsten electrode performance in many respects superior to pure tungsten electrodes . Than pure tungsten thorium oxide provides about 20 percent higher than the current carrying capacity , generally longer life , but also help prevent contamination when welding . Using thoriated tungsten electrode , arc easier than that of pure tungsten electrode and the arc or zirconium tungsten electrodes more stable. Thorium tungsten electrode 1% (EWTh - 1) and thorium tungsten electrode 2% (EWTh - 2) can be used for DCEN. They remain in the welding process sharpened tip , which can be used to weld steel pipe , not usually direct current, because it is difficult to maintain a spherical tip welding without cracking , which is a must for direct current .

Thorium tungsten electrode application

Thoriated tungsten electrodes are usually used for the DC negative electrode or carbon, stainless steel, nickel alloys, titanium alloys and other applications of the positive electrode . Their operating performance , even when the overload current of the operation can be very good .

Thoriated tungsten electrode is usually used in the field of carbon and stainless steel . Thorium oxide content of 2% thoriated tungsten electrode is typically less than 1% of the thorium content of the tungsten electrode to better improve performance . Communicate using thorium tungsten electrode welding, faster , and to be used with caution in order before welding on AC DC welding reaction . In AC welding, balled balls will not melt, so the effect is not as liquid ball so well.

Thoriated tungsten electrodes are usually used for DC welding field, while pure tungsten electrodes for AC welding . During the welding process , the staff should carefully read the instructions for use of thorium tungsten electrode .


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Doped tungsten wire , also commonly known as anti- sag tungsten wire, tungsten, aluminum , tungsten, its main feature is added in the dispersion strengthening elements potassium , forming a " dovetail lap " -shaped interlocking internal grain structure, and thus improved resistance to high temperature creep resistance tungsten .

Doped tungsten complete production line including blue tungsten reduction from APT to the addition of modified elements potassium, aluminum , silicon , and then sintering melt down , rotary forging process , coarse and fine tungsten filament in each step of the process . W31, W61, W91 , and WR15 new high-temperature tungsten filament :

W31

It has as excellent high temperature performance, reeling performance , to meet the energy-saving lamps , fluorescent lamps production use, Weihai polycrystalline material in 5 kg to provide a single , suitable for change pull factory. Grades from Japan , therefore , corresponds to the early use of filament capsule of the user.

W61

Equivalent grades of tungsten in Japan W31 performance and use, provides a single Weihai polycrystalline material in 5 kg , the same change for pulling factory. Grades from China's latest national standards.

W91

With excellent high temperature performance, can be used for high and low voltage halogen lamps , vehicle lights and high performance requirements of high prices on the tube and other fields.

WR15

It's a high -grade , high temperature, high shock tungsten wire, high temperature performance superior W91 grades for high color temperature , energy-efficient ( up C-class energy efficiency standards ) halogen incandescent lamp , is the material of choice for export to EU .


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Lanthanum -doped tungsten micro advantages and positive effects are :

1 Lanthanum -doped tungsten is added to a small amount of tungsten -doped lanthanum , changed the composition of doped tungsten , lanthanum doped tungsten micro cold resistance , heat resistance and other physical characteristics were compared with the conventional tungsten -doped greatly improved, the tests showed that micro- doped lanthanum tungsten cold, heat resistance than conventional doped tungsten are increased by 5 to 7%.

2 , The use of pressure guns lanthanum acid ammonia solution in spray form to be placed in the pot dopant doped tungsten blue spray , can effectively control the addition amount of lanthanum , tungsten is reached improve performance purposes , but also effectively reduce production costs, improve economic efficiency of enterprises .

3 , Increases in the later process of flame oxidation in air annealing step , the processing can effectively eliminate the hardened alloy , the alloy during processing to eliminate the internal accumulation of stress , tensile strength, lower tungsten , the tungsten wire the manufacturing more convenient.

4 , The production of micro- doped lanthanum by the addition of a small amount of tungsten lanthanum , thus changing the composition of the doped tungsten and internal grain size while eliminating the micro by oxidation annealing stress within tungsten doped lanthanum , therefore produced tungsten has a good seismic performance. Tests showed that using this method of production of micro- lanthanum -doped tungsten produced each 10 14V0. 1A0. 7CP bulbs, tungsten specifications for the 1. 0mg/200mm and 1. Ang/200mm, doped with tungsten in the same general seismic tests carried out under the conditions of contrast , the result is a specification of 1.2mg / / 200mm light bulbs, ordinary doped tungsten average number is 673 times the impact resistance , resistance to micro- doped lanthanum tungsten average impact of the number of 1233 ; specifications for a . 0mg/200mm bulbs , ordinary doped tungsten average number of 680 times the impact resistance , while the micro- doped lanthanum tungsten average number of impact-resistant 1209 times.

5, With a simple process, easy to implement and the advantages of low production costs , while the production of micro- lanthanum -doped tungsten has a long life , optical performance, strong seismic performance and a light bulb filament sag after use small amount of features.


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