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Efficient Arc Welding Tips and Techniques for Beginners
It is obvious that Arc welding is considered as the major and an essential part of all the industries involved in designing and infrastructure. But what arc welding is? It is a process of fusing two metals by applying intense heat. This welding type used welding power supply in order to create an electric arc between base material and electrode. And, the final product that develops contain all the properties, just as in metals. The term arc welding is named because the heat that is used during the process of melting the metal at the juncture of joining is caused by an electric arc. With the help of a mechanically guided electrode, carrying the current between tip and the joint leads to cause of electric arc. Listed here are some of the arc welding tips and techniques for the beginners.
- Safety Precautions
Remember that before commencing with any of the welding methods, you need to adopt proper safety precautions. During welding harmful UV rays and sparks are produced that can damage eyes and skin, so it is important to wear safety glasses to get rid of any kind of damage. Also, wearing helmets during arc welding is mandatory. After all, self protection is a must to reduce risk of fire accidents and electric shocks. So before starting with arc welding, make sure that you have every safety gear ready with you.
- Rod and Arc Setting
This is the one of the most crucial and important parts of this procedure. And, if you are starting with this welding type for the very first time then it is better to do it on a rusty metal work as it is much more tolerant to the rusty surfaces. Also, make sure that your current setting should be in the correct position. And, if you are making use of 2.55mm rods, then make sure to use only 80 amps current supply. Also, polarity settings have to be adjusted. Polarity setting is done in such a way that the rod is positive and the earth is negative.
- Arc Welding Process
At first you need to turn on the welding machine. An electric arc is being generated when the welding rod comes in contact with the juncture of fusion. Generally, Tap Starting and Scratch Starting, are used for the process of electric arc generation. In Tap starting method, an electrode is used to tap on the work that removes excessive flux from electrode tip, which meanwhile creates an electric contact to generate the arc. While in scratch starting method, the rod is made to scratch against the surface of the work slightly and as the spark is generated, the rod can be lifted off. Also, remember not to put extra pressure in the method, because through this the rod might get stuck to the work medium.
Stick welding is known as the process that makes use of a covered electrode called stick. Also, known as Shielded Metal Arc Welding or SMAW, stick welding is the most widely used method today than other welding methods. But, now the question is how do they work?
The equipments used:
Stick welder contains circuitry inside the machine, which enables to carry a specified amount of voltage, therefore creating an arc. And, this is the reason why these welders are sometimes referred to as ARC welders. Totally relying on the application as well as on the machine, the current can be either alternating or direct current. The circuit board, which is present inside the welder enables it to ground the negative to the positive by creating heat without burning the electronics.
Shielded Metal Arc Welding (SMAW)
The welding procedure with the help of stick is called shielded metal arc welding or SMAW. The welding stick is a metal, which is coated with a flux material that burns off when the arc is struck, thereby creating a gas that protects the weld created. This type of welding is the most preferred method for the purpose of large metal structures like building framework, etc., because of its versatility and penetration ability. Although, today, other welding process like Flux-cored welding, or wire feed, is gaining more popularity, but stick welding still dominates the field.
The Weld:-
Factually, there are two types of leads that occurs in a stick welder. One lead is the negative clamp, and the other is the positive lead. In positive lead, the consumable metal stick is placed, while the negative lead is clamped on to the metal that is to be welded. During the process, when positive lead containing the stick comes in contact with the metal, an arc is created that further burns into the metal surface. Throughout the arc burning process, the stick is also burned, which thereby creates the weld. And, this is why welding is considered different than that of soldering process.
Safety Measures
While getting indulged in the process of welding, it is imperative to consider certain safety precautions to get rid of the risky environment. Always make sure to wear a welding hood when striking an arc. It is known that harmful UV rays are produced during the welding that can lead to burn in the eyes, so it is advisable to wear suitable goggles during welding. Also, wear leather welding gloves and a long-sleeved leather jacket, as well as heavy footwear and jeans. Remember, to remove all the inflammable materials from the work area before welding. So, consider the safety measures in order to get clean and successful welding.
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Frequently Asked Questions...
electric arc foundry using my arc welder?
I have built a propane fired foundry to melt and recast aluminum. It works well except that it uses too much fuel and I don't like to have my propane tank refilled all of the time. My wife is a tight wad and I can not often come up with the cash to refill my propane tank. So, I would like to change my foundry over to electric. I have searched the web and see some plans for sale. The plans are for an electric "bertha" furnace using resistance wire and contollers. I guess this would be okay but I don't have all of the technical data that I feel I need and I don't have the money to purchase many supplies and expensive controllers and I refuse to buy the plans over the internet. I am sure that there is someone out there that will give the info. for free. Also, I have a 160 amp arc welder, could I use that some how to remake my propane furnace into an electric arc furnace?
Answer:
The problem I'm trying to overcome here is the money needed just for the energy. I'm concerned that, if the little woman is fussing now about a $16 tank of propane, what will be her reaction if all of a sudden an electric bill for $600 shows up? I would estimate that the price per watt of propane should not be too different than that of electricity. a lot of factors come into play here, like -
-How large a furnace do you need?
-How much material must be fired at a time?
-How often do you do a run?
-How much propane are you currently using, or how much would you expect to be using if money were no issue?
Also, there is a definite limit as to how much energy you can draw from the lines. For example, you might have to limit to 240V, 50A, which is 12 kilowatts. I don't know if that's enough energy for your needs, but I can tell you that such a draw would cost about $1-2 per hour.
I do have a book in storage on building kilns, if you want I can take a look at it - email me if yes.
BW,
Gary













































































