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Most stick welding SMAW is done with Direct Current DC. As this current passes thru the base metal it can set up a circular current on either side of the weld area creating a magnetic effect. The arc is affected by this and whips back and forth drawn by this magnetic field. Metal is blown out of the arc and splatters onto the sides of the weld and the arc is hard to control. This arc blow can be reduced by passing a separate magnetic field thru the metal nullifying the effect, or by welding in the opposite direction, or by using Alternating Current AC
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Can plasma arc welding weld non magnetic materials?
Plasma arc welding can weld almost any commonly used metal. It is not limited to magnetic metals, they only need to conduct electricity.
What is air break switch?
An air break switch comprising one or more fixed contacts and one or more movable contacts which are movable between open and closed positions, and a coil which, preferably in conjunction with magnetically susceptible material acting as a flux director, provides a magnetic field in the vicinity of the separable contacts in a direction which is substantially normal to a shock front which tends to be set up by establishment of an arc between the separable contacts and has a value such as to cause the Alfven speed, at least in the vicinity of plasma associated with the arc, to be significantly in excess of the air speed attainable by such shock front, in order to hinder or prevent establishment of such shock front. The coil may surround an arc chamber containing runners defining chutes into which the arc moves under the normal blow-out magnetic field set up by the current through the contacts and in the arc.
How do you calculate arc length between electrode and charge in arc furnace?
Arc Length depends on the secondary voltage of furnace transformer. Thumb rule is for 500V the Arc length would be 500mm(20"). The purpose of arc length is to give maximum power to the melt, without arc flare. -
Region around a magnet in which magnetic force can act?
Magnetic freild
What detemines the intensity of an arc flash?
-- the current in the arc -- your definition of 'intensity'
What is arc blow?
Most stick welding SMAW is done with Direct Current DC. As this current passes thru the base metal it can set up a circular current on either side of the weld area creating a magnetic effect. The arc is affected by this and whips back and forth drawn by this magnetic field. Metal is blown out of the arc and splatters onto the sides of the weld and the arc is hard to control. This arc blow can be reduced by passing a separate magnetic field thru the metal nullifying the effect, or by welding in the opposite direction, or by using Alternating Current AC
How does arc blow affect welding?
Arc blow is a magnetic field formed in the weld area. It will pull the arc back and forth keeping it from being concentrated directly ahead of the electrode. Metal in some areas will not be melted and slag will flow into these voids trapping it. The arc can expel molten metal from the joint creating spatter. Arc blow can be very severe. You can avoid this by connecting the work lead to the end of the weld joint. Then work away from the work lead.
A steel wire of length l has a magnetic moment M It is then bent into a semi circular arc The new magnetic moment is?
Since, a steel wire is bent into a semi circular arc ,the new magnetic moment will be M
How much of a magnetic field Guss do you need to blow a cars computer?
how much of a magnetic field guss do i need to blow a cars computer
Can plasma arc welding weld non magnetic materials?
Plasma arc welding can weld almost any commonly used metal. It is not limited to magnetic metals, they only need to conduct electricity.
Can I microwave a meal in a metal pan?
No, you will blow up the microwave. It will arc.
What has the author Rigel Woodside written?
Rigel Woodside has written: 'Investigating arc behavior in a DC vacuum arc remelting furnace using magnetic flux density measurements'
How can arc blow be controlled?
It can be controlled by connecting the work lead to tha end of tha weld joint and than welding away from the work leadThe ARC blow can be controlled by connecting the work lead to the end of the weld join. Then you will have to weld away from the work lead.
What is air break switch?
An air break switch comprising one or more fixed contacts and one or more movable contacts which are movable between open and closed positions, and a coil which, preferably in conjunction with magnetically susceptible material acting as a flux director, provides a magnetic field in the vicinity of the separable contacts in a direction which is substantially normal to a shock front which tends to be set up by establishment of an arc between the separable contacts and has a value such as to cause the Alfven speed, at least in the vicinity of plasma associated with the arc, to be significantly in excess of the air speed attainable by such shock front, in order to hinder or prevent establishment of such shock front. The coil may surround an arc chamber containing runners defining chutes into which the arc moves under the normal blow-out magnetic field set up by the current through the contacts and in the arc.
Does wind blow true north or magnetic?
neither it follows air currents all which and every way every direction
Which medical imaging technique depends on the use of xrays moving in an arc around the body producing a cross sectional image?
Magnetic Regonance Imaging (MRI)
What is one main fucntion of the condenser in engine?
The condenser will absorb an electrical charge when the magnetic field collapses so the current won't arc and burn and cause a short in the battery.
