Hello JNEcnh, it is unfortunate that you aren't being shown the way to use this tool as it is a life saver for many different purposes once you get out into the working world. There are a couple of things to consider with the use of a carbon arc. Protection, protection, protection, this is one tool that puts out a lot of hot spatter that can burn you and many things around you. So before using this tool you need to be sure of your surroundings and also watch where you direct the molten spray that it will emit. Keep in mind any flammables or other items that could catch fire, the shower of hot molten slag that comes off of this can land in any number of places and cause delayed fires very readily. Always use a fire-watch when you put this to work and if possible wet down the area in the vicinity of it's use. Personal protection is a must as the combination of compressed air and hot molten slag will allow all of this hot stuff to find the tiniest hole in your protective gear and possibly burn you very badly. The arc from this process is also very intense so you should be using the appropriate shade lens in your welding hood to allow for the amperage that you use. You are likely already aware of the equipment needed to perform this operation, but I'll go through it very briefly. A special rod-holder designed for this process is used, it generally has a set of jaws of which both are able to rotate and one is drilled and connected to an air control button. These jaws have a V-notch in them to aid in positioning the carbon rod with respect to the compressed air stream. Generally you can start with the rod extended roughly 4 to 5 inches from these swivel pads and as you use this tool the carbon will burn off requiring you to stop and extend it out again as required to avoid burning the insulators and jaws off of the carbon arc head. You will need around 80 to 100 psi dry,compressed air of sufficient CFM, meaning that it may be a good idea to use a compressor that has a water trap or make sure to bleed the water out of the compressor tank before using it. When you go to start making a pass with the carbon arc, make sure that the holes on the swivel pad are positioned under the rod in the area that you are pushing the carbon rod towards. A push angle will yield the cleanest removal of materials, if you use a drag-type of motion the resulting groove will be filled with slag and require a bunch of grinding to clean out. In short the carbon rod provides the energy to melt the material being removed. The compressed air blows this molten material out of the path of the rod leaving a shaped groove which is influenced by the shape of the carbon rod. A round carbon rod will leave a somewhat half-round shape, a rectangular or what could be referred to as a flat-carbon rod will be used to flush-off welds and knockdown high spots on surfaces. There are many different diameters of carbon-rods available, the "flat" rods are also available in quite a few different sizes. Each of these rods will require different amounts of amperage to do the most efficient job. I don't have ready access right now to the amperages that are suggested for a given size or diameter of rod so I won't include that, likely others who reply will be able to provide that information to you. I can tell you that if you don't have sufficient amperage you will likely experience an arc that doesn't like to maintain itself, if you have too much amperage, you might notice the rod end being blown-off quite frequently and the end of the rod glowing back for 2" or more roughly. There are different methods for applying this tool. Some folks like to watch in front of the rod and gauge the depth of the cut by watching it from this vantage, others like to look behind the arc and follow it's progression. It takes a fair amount of practice to become proficient with it's use, so plan on spending a considerable amount of time if you want to get really good with it. Personally, I watch behind the rod the majority of the time as I am removing a weld, I watch for the point of connection, some might call it the crack, to indicate when I have separated one piece from the other. You can vary the depth of material removal by the speed which you move forward as well as controlling the depth that you push the carbon into the material, you will realize your cleanest gouging by not going too deeply and moving fairly quickly along the line of removal. I have already rambled quite a bit so I'm going to stop for now. One final note, this is a LOUD process, make sure that you use really good ear protection, two reasons, NOISE and JUNK getting into your ears, neither are going to be good for you. Good luck and best regards, aevald
If you want to learn more, please visit our website Rods Gouging Torch.
When it comes to your oxy-fuel torch setup, performance and safety are key. Arguably one of the most important components that will affect both of these is your cutting tip choice. Choosing the right tip for your application will not only provide smoother cuts but will also help protect you and your torch and eliminate any downtime from tip or torch damage. When reaching for a cutting tip for your torch, make sure to account for these four factors.
1. Seat type
Gas equipment manufacturers design tip seats specifically and uniquely for the torches they sell — tips are not interchangeable, making it essential to double-check that the tip you’re using is compatible with the torch. Many manufacturers use metal-to-metal or hard seat tip designs. Hard seat tips rely on tip nut torque and precisely machined surfaces to seat properly. The soft seat tip design by Miller is more pliable and will conform to imperfect surfaces, allowing it to seal and still work properly. The tips can be hand-tightened (no tools necessary), which makes for quick and easy tip changes.
2. Application
Tips are also designed to match specific applications. Processes such as cutting, heating, gouging or brazing all require different tips to ensure the application’s process doesn’t exceed the capabilities of the tip or negatively impact the work being done.
3. Metal thickness
The best operating experience (and work outcome) comes from the right cutting tip size. The thickness of the workpiece metal will determine the size of the tip, with thicker metals typically requiring bigger tips. You always need to size the tip to the work and then adjust the fuel and oxygen pressures accordingly.
For example, if you’re using a cutting tip that’s meant for 2-inch metal on a 1/4-inch-thick workpiece, an improper tip can waste gas and generate unnecessary amounts of heat and sparks. Additionally, the heat-affected area will show signs of dross on the edges of the cut, requiring grinding to clean up the area.
Note that your torch has a maximum cutting thickness based on how it’s designed and its flow capabilities. You should never use a tip designed to cut a higher thickness of metal than your torch is designed to cut.
For more pn digital welding helmetinformation, please contact us. We will provide professional answers.
To make this easier, tip charts exist to help choose the right size option for whatever task you’re tackling.
4. Fuel gas
Different fuel gases have different characteristics that affect their function, so you’ll want to choose a cutting tip designed for the fuel gas you are using.
Using the wrong cutting tip for the fuel gas can burn tips up quickly and may result in a backfire. With fast-burning fuel, like acetylene, the flame is present and stable immediately, and no tip recess is necessary. Slower-burning fuels, like propane or natural gas, require a tip that’s designed with a recess at the end of the tip to give the flame time to start and stabilize before exiting the tip.
Another application in action: heating
For heating applications, the process in choosing a torch tip is very similar. You still need to assess the seat, metal thickness and fuel type; however, there are other items to consider for heating applications.
For example, a heating tip is going to focus heavily on the heat energy produced by the tip, which is measured in British thermal units (Btu). The heat, or Btu output, of the tip needed will depend on the metal thickness. A good rule of thumb is that you’ll want a higher Btu tip as the metal thickness increases. Using a lower Btu tip on a thicker piece of metal will take longer to heat the area than using an appropriately sized, higher Btu tip.
When factoring in the fuel gas being used for heating, you still choose a tip to match the fuel, but it’s equally important to use the proper cylinder size. The right cylinder size ensures that there is sufficient gas flow for the specific heating tip. The flow requirements for a given heating tip size are determined by the fuel consumption (which is measured in standard cubic feet per hour) and oxygen consumption (which determines the minimum cylinder size to use).
If you are using a heavy-duty heating tip that produces a higher Btu, there are additional steps needed for optimum safety and output. More heat produced means you will consume more fuel, requiring larger fuel and oxygen cylinders depending on the fuel gas being used. With acetylene fuel gas, you may need to manifold cylinders together for a safe operation. For propane applications, which consume a lot of oxygen, you will want a larger oxygen cylinder to meet the correct fuel-oxygen ratio. Refer to your tip manufacturer’s owner’s manual for the recommended number of cylinders to be used. Using a larger heating tip will also require heavy-duty regulators, which will provide the high gas flow to meet tip consumption requirements. Lastly, you'll likely need hoses with a larger diameter to supply the proper gas volume.
Want more information on Welding Torch Exporters? Feel free to contact us.