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 polarity is recommended should be used for carbon arc cutting steel?
DC (electrode positive) is normally preferred for steel and stainless steel but AC is more effective for cast iron, copper and nickel alloys.
How many CFM do I need for an air arc?
The torch & cable requires a compressor with a recommended output of at least 80 PSI at 22 CFM. “An Arcair air carbon-arc gouging set up was one of the first tools that I purchased when I started out on my own because you can’t fix or repair anything any other way…to last, at least,” says Carrion.
How loud is carbon arc gouging?
Air carbon arc cutting and gouging is a welding process that exposes workers to hazardous sound levels from 108-120 dB(A). Welders who perform the gouging process and other workers in close proximity to the process are at risk for noise-induced hearing loss.
What equipment is needed for arc carbon gouging?
Required equipment includes an air compressor, welding power source, carbon electrode and a gouging torch. The air carbon arc process is shown in figure 10-75.
Do you reverse polarity when gouging?
The actual arc voltage is governed by arc length and the type of gouging. For most applications CAC-A is used with DCEP (reverse polarity). The electrode should extend at most 7 inches from the gouging torch with the air jet between the electrode and workpiece.
Which angle should the gouging carbon electrode be when gouging?
35 to 45 degrees
Hold the torch so that the carbon electrode slopes back from the direction of travel with the air blast blowing past the tip of the electrode to evacuate the molten metal. The proper torch-to-workpiece angle is 35 to 45 degrees.
What are the 4 types of carbon arc gouging electrodes?
Our standard pointed 12″ gouging electrodes come in these diameters: 1/8″, 5/32″, 1/4″, 5/16″, and 3/8″.
How many amps is a carbon arc?
Air Carbon Arc Gouging Procedure Schedule
|Grove Width||Amps Direct Current|
|5/16||7.9||To make 1/4 in. deep groove, make two 1/8 in. deep passes|
Why is welding so loud?
The polarity of the electrical current—whether it’s AC or DC—affects sound in TIG. AC TIG is much louder than DC. As amperage increases, welding noise will also increase. For example, a torch-to-workpiece angle greater than 20-25 degrees may cause a popping sound as well as poor weld quality.
What is carbon arc gouging used for?
Effectively remove metal with proven air carbon-arc gouging tips and advice. Air carbon-arc gouging removes metal through the intense heat of an arc created between a carbon electrode and the workpiece.
What should the voltage be for air carbon arc gouging?
However, any three-phase welding power source of sufficient capacity may be used for air carbon arc gouging. The arc voltage used in air carbon arc gouging and cutting ranges from a low of 35 to a high of 56 volts; thus the open-circuit voltage should be at least 60 volts.
When did air carbon arc gouging first start?
1.02 HISTORY Air carbon-arc gouging began in the 1940s, evolving from the existing carbon-arc cutting process. Myron Stepath, a welding engineer, developed air carbon-arc gouging to remove several hundred feet of flat, cracked, stainless steel weld.
How does carbon arc gouging remove molten metal?
Air carbon-arc gouging removes metal through the intense heat of an arc created between a carbon electrode and the workpiece. As the material melts, compressed air, which is directed through outlets in the lower jaws of the torch holding the electrode, lifts the molten metal clear of the arc before the metal solidifies.
Do you need an air compressor for arc gouging?
Arc gouging is the most used and most economic form of gouging. It can be run off the same machine you use for stick or TIG welding and the only additional equipment you need is an arc gouging torch and air compressor. In this video we will show you how to set up your machine.