What is Arc Gouging in Welding? Arc gouging is a welding process that uses an electric arc to remove material from a workpiece. Arc gouging can be performed with either a handheld torch or a machine-mounted gouging torch.
What are the applications of metal arc gouging?
Typical applications include back gouging, removal of surface and internal defects, removal of excess weld metal and preparation of bevel edges for welding. The main advantage of manual metal arc (MMA) gouging is that the same power source can be used for welding, gouging or cutting, simply by changing the type of electrode.
What is “gouging”?
Gouging correctly termed as “Air Arc Gouging” is an arc process for removal of material from steel plate/ pipe. Arc is formed between carbon electrode and workpiece.
What is back gouging in welding?
Back gouging is a material removal process that is used to remove weld material that is located on the back side of a weld joint. The objective of Back gouging is to facilitate complete weld fusion from the root side back weld.
What is the difference between MMA gouging and MMA welding?
MMA gouging differs due to requiring special purpose electrodes with thick flux coatings in order to generate a strong arc force and gas stream. Unlike MMA welding where a stable weld pool must be maintained, this process can force the molten metal away from the arc zone to leave a clean-cut surface.
What is the purpose of arc gouging?
The main goal of air arc gouging is to remove defective or old welds to repair or dismantle equipment. Unlike oxy-fuel cutting, air arc gouging avoids the need for oxidation of the metal to cut. The rate of metal removal depends on the efficiency of air jet in removing molten metal and the melting rate.
What do you need to arc gouge?
0:178:11Arc Gouging Basics (Part 1): Machine Setup - YouTubeYouTubeStart of suggested clipEnd of suggested clipIt requires an air source it requires carbon arc electrodes. And the air is shot out of some holesMoreIt requires an air source it requires carbon arc electrodes. And the air is shot out of some holes down here at the bottom we strike an arc with an electrode. And the air displaces.
What are gouging rods used for in welding?
Gouging carbon rods are used for metal removal at fast rates with low power consumption. It is generally used to remove welding defects, excess welds and foundry risers from cast products.
Can you arc gouge without air?
ZENA NO-Gas arc cutting/gouging rods let you gouge, bevel, and cut metal without needing a 300+ Amp air-arc gouging/cutting rig or an acetylene cutting torch and bulky gas bottles.
How much psi do I need for arc gouging?
COMPRESSED AIR Use ordinary compressed air for air carbon-arc gouging. Normal pressures range between 80 psi (551.6 kPa) and 100 psi (690 kPa) at the torch; higher pressures may be used, but they do not remove metal more efficiently. Use 60 psi (413.7 kPa) with the light-duty manual torch.
Can you arc gouge cast iron?
In fact, most common metals (carbon steel, stainless steel, high-alloy wear plate, copper alloys and cast irons) can be cut using air carbon-arc gouging.
Why is gouging important in welding?
A: Gouging is necessary for many tasks related to welding when the operator is trying to remove material to get to clean metal. The most obvious use of gouging is to remove large amounts of metal or welds that need to be repaired.
What are the types of gouging?
Three types of gouging: (a) Local gouging, (b) Rear gouging, and (c) Global gouging.
How loud is carbon arc gouging?
Air-arc gouging is the process of melting an old weld with a carbon based electrode (rod) and blowing the molten metal away with compressed air. Noise levels of 115 dBA or higher can be generated in this process.
Is arc Gouging hard on welder?
The machine needs to be CC (constant current) Machine should have minimum 60V Open Arc Circuit. Don't crank the machine to 100% effort. Gouging can be hard on your welding machine. Think of it as a car hauling a trailer uphill.
What polarity is gouging?
In DC gouging, electrode polarity is normally negative but electrode manufacturers may well recommend electrode polarity for their brand of electrodes and for gouging specific materials. When using an AC power source, a minimum of 70V open circuit (OCV) is required to stabilise the arc.
How do you gouge with a torch?
0:108:06Arc Gouging Basics (Part 2): Proper Torch Angle - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe use a constant. Current welding machine same thing as a stick welding power source I'm going toMoreWe use a constant. Current welding machine same thing as a stick welding power source I'm going to use about 80 psi of air pressure. I'm going to use a quarter inch carbon arc electrode in a holder
How many CFM do I need for arc gouging?
12-15 cfm will work but will work the compressor full time. The bigger the compressor and the more tank you have the longer it will last and more efficiently it will work. Most work can be accomplished without opening the air all the way on the torch.
What is the most common type of electrodes used for manual cutting or gouging?
The most widely used electrodes are DC copper-coated electrodes that are formed by combining the carbon-graphite mixture with a binder.
How do you cut with an arc welder?
Take a 6011 (or 6013) rod and set your welder on 125-135. Once you initiate the arc you will notice that none of the rod creates a weld. To cut the metal you will need to push the rod down into the steel and keep the tip of the rod flush with the other side. The arc should stay lit and cut a path as you move the stick.
How do you use a gouging tool?
0:151:37How to Use a Gouge | Woodworking - YouTubeYouTubeStart of suggested clipEnd of suggested clipSimply vary the angle between the blade and the surface. Increase the angle of the blade as perMoreSimply vary the angle between the blade and the surface. Increase the angle of the blade as per desired depth sway the gouge from side-to-side feathering. The cut through its path.
What is gouging welding?
Gouging is the term to define a type of corrosion which occurs on a metallic surface in which a hole, groove or indentation is created. In welding, gouging has been a requirement for many years in several industries and applications – and is one method to scrutinise.
How is arc formed in MMA welding?
The arc is formed between the tip of the electrode and the workpiece in conventional MMA welding. MMA gouging differs due to requiring special purpose electrodes with thick flux coatings in order to generate a strong arc force and gas stream. Unlike MMA welding where a stable weld pool must be maintained, this process can force the molten metal away from the arc zone to leave a clean-cut surface.
Why is a carbon arc gouge not smooth?
However, because the arc/gas stream is not as powerful as a gas or a separate air jet, the surface of the gouge is not as smooth as an oxyfuel gouge or air carbon arc gouge. This type of gouging is used for localised gouging operations such as the removal of defects.
Why is air jet gouging so noisy?
However, there are disadvantages: the air jet causes the molten metal to be ejected over quite a large distance and, because of high currents (up to 2000A) and high air pressures (80 to 100 psi), it can be very noisy. This type of gouging can be applied to a wide range of metals.
What are the two methods of gouging metal?
Two of the most common methods of gouging metal are plasma gouging and air carbon-arc gouging.
What is DC gouging?
This type of gouging can be applied to a wide range of metals. DC (electrode positive) is normally preferred for steel and stainless steel, but AC is more effective for cast iron, copper and nickel alloys. Typical applications include back gouging, removal of surface and internal defects, removal of excess weld metal and preparation of bevel edges for welding.
Can MMA gouge stainless steel?
If this process is correctly applied, MMA gouging can produce relatively clean gouged surfaces. For general applications, welding can be carried out without the need to dress by grinding. However, when gouging stainless steel, a thin layer of higher carbon content material will be produced – this should be removed by grinding.
What is a gouge in welding?
Gouging is the term to define a type of corrosion which occurs on a metallic surface in which a hole, groove or indentation is created. In welding, gouging has been a requirement for many years in several industries and applications – and is one method to scrutinise. Particularly in maintenance and repair, the ability to gouge or groove metal is critical and deserves full consideration.
How is arc formed in MMA welding?
The arc is formed between the tip of the electrode and the workpiece in conventional MMA welding. MMA gouging differs due to requiring special purpose electrodes with thick flux coatings in order to generate a strong arc force and gas stream. Unlike MMA welding where a stable weld pool must be maintained, this process can force the molten metal away from the arc zone to leave a clean-cut surface.
What is MMA gouge?
The MMA gouging process is characterised by the large amount of gas which is generated to eject the molten metal. However, because the arc/gas stream is not as powerful as a gas or a separate air jet, the surface of the gouge is not as smooth as an oxyfuel gouge or air carbon arc gouge.
What is gouging used for?
This type of gouging is used for localised gouging operations such as the removal of defects. It is also used where it is more convenient to switch from a welding electrode to a gouging electrode, rather than using specialised equipment.
How does a metal gouge work?
The metal becomes molten and a high velocity air streams down the electrode to blow it away and thus leaves a clean groove. It is a simply process to apply, has a high metal removal rate and gouge profile can be closely controlled.
What is DC gouging?
This type of gouging can be applied to a wide range of metals. DC (electrode positive) is normally preferred for steel and stainless steel, but AC is more effective for cast iron, copper and nickel alloys. Typical applications include back gouging, removal of surface and internal defects, removal of excess weld metal and preparation of bevel edges for welding.
Why is air jet gouging so noisy?
However, there are disadvantages: the air jet causes the molten metal to be ejected over quite a large distance and, because of high currents (up to 2000A) and high air pressures (80 to 100 psi), it can be very noisy. This type of gouging can be applied to a wide range of metals.
What is air arc gouging?
Gouging correctly termed as “Air Arc Gouging” is an arc process for removal of material from steel plate/ pipe. Arc is formed between carbon electrode and workpiece. This arc melts the workpice in arc area. Compressed air is blown over the molten pool to dislodge the material.
How does carbon arc gouge work?
The metal becomes molten and a high velocity air streams down the electrode to blow it away and thus leaves a clean groove. It is a simply process to apply, has a high metal removal rate and gouge profile can be closely controlled. However, there are disadvantages: the air jet causes the molten metal to be ejected over quite a large distance and, because of high currents (u
What is a weld in metal?
Welding is when you use a like metal to attach two pieces. That like metal can be the pieces themselves (like in the case of fusing, or a solid state diffusion well) or it can be in the filler wire in a MIG or TIG weld. In general this is done at the melting temperature of those alloys because you are using that alloy to attach the two pieces together.
What are the two methods of gouging metal?
Two of the most common methods of gouging metal are plasma gouging and air carbon-arc gouging.
How to remove metal from a carbon arc?
This process uses carbon electrodes, compressed air and a suitable power source. The strong arc used between the tip of the carbon electrode and the metal workpiece will dissolve the workpiece. Start the arc by hitting the electrode tip on the surface of the workpiece. Start the arc by hitting the electrode tip on the surface of the workpiece. Compressed air is then used to blow the molten metal out of the metal surface.
What is the advantage of MMA welding?
The main advantage of manual metal arc (MMA) gouging is that the same power source can be used for welding, gouging or cutting, simply by changing the type of electrode.
What is MMA gouge?
The MMA gouging process is characterised by the large amount of gas which is generated to eject the molten metal. However, because the arc/gas stream is not as powerful as a gas or a separate air jet, the surface of the gouge is not as smooth as an oxyfuel gouge or air carbon arc gouge.
