Archive for the ‘Tig Welding’ Category

Tig Welding Troubles With Aluminum

Tuesday, March 2nd, 2010

The total number of times the AC TIG arc changes in between the electrode negative and electrode positive in one second is known as Frequency or Hz. Take in consideration the Miller’s Dynasty 300 DX inverter-based TIG power source, it always allows to alter the frequency of the power supply from 20 to 250 Hz.

It’s notable that usual TIG machineries have a fixed amount of frequency which is something to that of a 60 Hz of primary power. When the frequency of the power sources is increased, you can find that it trims the shape of the arc cone and boosts up the arc force. Because of this the arc is reduced and stabilized, moreover gives exceptional directional direct on the arc.

On lap and T-joints, by a high frequency gives ways to set up the weld puddle right at the root. Resultantly, we get a good infiltration and moreover the etch zone is also minimized.

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Overview of Electroslag Welding

Wednesday, February 17th, 2010

Electroslag Welding (ESW) the process of welding is to join two plates or metals by depositing the weld metal in the weld cavity. In order to prevent the running off of molten slag the space is covered with the help water cooled copper dams. Since the depositions rates are very high in Electroslag Welding it is considered most productive welding techniques for joining very thick metals. The process makes the use of direct current to weld the thicker metals and so the need of making an arc is extinguished.

Advantages of Electroslag Welding method include:

  • Highly productive in welding techniques
  • The cost of making a joint is very low
  • The welding process can be carried on a single pass without taking into the consideration the thickness of metals
  • During the butt joints there is no angular deformation
  • The stress of transverse is very little
  • The risk of hydrogen getting cracked is low
  • Major repairs can be done in simple techniques by cutting out the weld totally and re - welding it
  • The speed of welding joints is 1 hour/ meter of seam, where the thickness of material is not taken into consideration
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Tig Welding Overview

Friday, January 29th, 2010

Tungsten insert gas welding is popularly also known as Gas tungsten arc welding (GTAW). You can protect the welding area from getting contaminated with the help of shielding gas which is insert gas.

Tig welding is more widely used to weld the thin sections of stainless steel and non ferrous metals such as aluminum magnesium and copper alloys. This welding process grants the operator to have a greater control over the weld when compared with other welding procedures such as shielded metal arc welding and gas metal arc welding. Though this welding process is very slow but it provides high quality welds.

Tig welding can be carried on all positions - flat, horizontal, vertical or overhead. Perfect for roll cages and inside confined areas too. Filler rod is one of the most important aspects in this welding process.

Equipments required for tungsten insert gas welding process are welding torch utilizing a non consumable tungsten electrode, a constant-current welding power supply, and a shielding gas source.

During this welding process an arc is formed between a non-consumable tungsten electrode and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld pool. If filler wire is used, it is added to the weld pool separately. Welders have to be careful while doing this procedure.

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Plasma Arc Welding Overview and Disadvantages

Wednesday, January 20th, 2010

Plasma Arc welding is a method of welding process, similar to Tig welding. PAW is an abvanced method of tig welding, which is designed to increase high productivity

Disadvantages

  • High Equipment Expense
  • Need More Operator Skills
  • Complex Welding Procedures
  • Producing Heavy Noise Level
  • Producing Higher Ozone Production
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A glance at welding and fusing processes

Tuesday, December 8th, 2009

Plasma and TIG welder are the two most commonly preferred welders with respect to precision fusion in the welding industry. Firstly both TIG and Plasma welders were developed with a hope and aim to make welding possible on a variety of metals and their respective alloys. But with passage of time and mind-blowing development of technology and sciences, they have improved to be capable of providing accurate welds. They are so accurate, so much so that the processes are greatly used in miniature welding processes and applications.

In the Tungsten Inert Gas (TIG) welder, electric arc between the tungsten electrode and the point of contact of the metal to be welded is produces. The arc is kick started when high voltage is supplied to the electrode. This heat that is being produced will heat up the metal and allow fusing to be take place. Even a plasma cutter uses a tungsten electrode.

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Tips For Buying a TIG Welder

Tuesday, November 10th, 2009

Advantages of TIG welding have no end. Yet, there are times that TIG cannot be a suitable choice to weld. TIG or GTAW is expanded as Tungsten Inert gas and Gas Tungsten Arc Welding respectively. Here are some factors that should help you to decide on using a TIG welder.

Work – Depending upon the type of welding task that has to be completed decide upon the welder type. Look for efficiency, metal type and speed to come to a conclusion. TIG welders provide great quality welds.

Quality – Quality is another aspect in welding. Choose a welder that will be apt for your quality needs. TIG offers great quality. It is prevalently used in nuclear work. This should explain the quality of welds it is capable of offering.

Metal thickness – If the metal that is to be welded is of less than 1 inch thickness then you should go in for MIG or stick welders. They are great for welding metals will smaller thickness.

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Remedies To Problems That Occur In Tig Welding

Friday, October 30th, 2009

TIG welding is expanded as Tungsten Inert Gas. It has a tungsten electrode that serves as the one which heats up the metal that is supposed to be weld. The gas saves from contaminants. TIG Welders are highly recommended at industries that require perfect and clean finished welds. TIG welders can weld more metals than other welders. There are very few problems that occur in TIG welders. They are stated here with remedies.

If tungsten burns through very fast then the source of problem may be either one of the following;

  • Inadequate gas flow
  • Wrong size of tungsten
  • During cooling tungsten would have been oxidized
  • Gas with CO2

Then follow the bellow stated remedies;

  • Be sure that that tank is full of gas.
  • Tungsten size is normally 3/32” in diameter. This is apt for a 220 amps current strength.
  • Allow the shielding gas to flow 15 seconds as soon as the arc stops.
  • Try using Argon gas instead of CO2
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