Posts Tagged ‘MIG welders’

Caution While welding Fuel Tanks

Friday, November 4th, 2011

Welding is a process wherein two or more metal pieces are joined together in heavy manufacturing. A molten solution is used to form the bond between these metal pieces and this particular molten solution is generated from tremendous amount of heat and light energy. It is quite dangerous when we get exposed to such intense energy transfer and we ought to practice caution at all cost. However, we our steps regarding caution have to be more vigilant especially when we are welding fuel tanks. There is a possibility of igniting fuel vapors and if MIG or TIG Welding processes are employed, the argon gas could suffocate the welder.

  1. Before welding, the welder should ensure that the battery is disconnected and the ignition mode is in switched off mode.
  2. Completely drain the fuel tank into an approved gas container.
  3. Once step 2 is done, remove the tank from the vehicle and see to that proper ventilation equipment is adopted while you start to weld the tank.
  4. After removing gas tank from vehicle, wash the tank several times with warm and soapy water. Do not dispose off the water and see to that it is properly stored in flammable container.
  5. Start evacuation of fuel fumes using an air hose for more than an hour until you are guaranteed that all fumes are evacuated and there is no longer detection of fuel fumes.
  6. Follow all safety standards before you start to weld and stick to the contract specification while performing the welding. After welding it, allow the tank to cool down for a desired temperature as per the specifications.

Once the tank has reached desired temperature, test for the integrity and quality of weld. Test for detection of any leaks which can be done by placing a small amount of fuel in the tank. If it is leak free, reattach it to the vehicle.

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Learning on the fast track: Budget money for practice material

Monday, October 24th, 2011

As a member of the technical support team at Everlast, it seems that every day or so I get a call from a guy learning to weld, just having bought one of our units. Typically he will be desperately looking for some advice on some new way to be an instant welder, after reading all the info he can scarf up and watching videos on line until he feels he should be able to weld competently upon the first arc strike. Of course, upon getting less than spectacular results, I receive a call.

One of the first things I try to assess is the metal that they are working with. More often than not, I hear from them that they have a couple of pieces of rebar, some old bed rails or some old exhaust tubing they got from a muffler shop.  To say the least, most times it’s less than less than ideal material. As a professional, it makes me cringe, but I do understand the dilemma. You scrap to save money for a newwelder purchase, and when you get it, you have nothing left for metal. Welding is an expensive hobby. Metal prices have been rapidly going up, and where it will stop, is any one’s guess. But having sufficient quantities of quality metal to begin practice on is important. It’s not necessary to purchase full sheets of metal to practice on, but it does require sufficient amounts to be able to repeat the same weld over and over. My recommendation is to go and purchase flat bar stock from a local steel supplier. Two inch wide pieces in at least 1/8” and ¼” thicknesses are quite adequate. These pieces can be cut up into short 4”-6” pieces and can be arranged in a variety of positions and joint types. A full 20 foot stick can yield lots of experience. The fresh, new steel relatively free of rust will guarantee a more enjoyable learning experience. Quarter inch thick pieces can be beveled as well so that open root welds can be practiced.

Someone new to welding may not realize that there is likely a steel supply house within driving distance to them most places in the United States. Large home stores, and farm supply stores often have short pieces of bar stock or small pieces of plate steel. Unfortunately these prices are the very things that drive people to experiment welding on pieces of rusted, or painted junk steel. Typically, you will find that a full piece of steel, aluminum, or stainless costs as much to buy as does the tiny pre-cut pieces in the local hardware chain. Buying from the steel supplier can be a daunting experience the first time, learning the jargon and short hand used at a fast moving pace, but it will save money in the pocket book. It will also help reduce early learning stresses by offering ideal working, and practice conditions. So if the prices of steel at the local supply house are making you wish you had saved money and looked around for a used welder, then go to the phone book and find you a good local steel supply house.

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The GMAW process (part 3):

Monday, August 22nd, 2011

In general MIG is considered a Constant Voltage (CV) process. While welding voltage does not vary, but wire speed determines the amps. As the feed rate of the wire changes, so do the amps. Many models of welders use an inch per minute scale, and others use an amp scale. Either is correct, though wire speed is the most commonly used scale. Many small and older welders don’t have a digital readout to provide an exact reading and may only carry a 0-10 scale to allow easier adjustment, without having to think about either. Generally with these settings, the weldor operates usually by sight and ear. Small inexpensive and larger transformer based welders may have taps ( a switch with preset detent) that limits the adjustments of voltage to a specific setting. The cheapest MIG welders also use taps for wire speed adjustment. Though simple to use this can be frustrating by preventing the best setting for the weld.

Many box and large chain stores offer small transformer MIG‘s that are rather inexpensive, and typically yield less than professional quality welds, especially in the hands of inexperienced users. Most of these units offered for sale use taps on at least the voltage. It’s another reason why MIG has been accused of making less than adequate welds. Not having enough adjustment can make achieving the best weld quite difficult. Quite a few customers buy them not fully realizing the expense involved in providing rolls of wire, consumables, and shielding gas. Often they turn to using Flux Core wire, which pound for pound ends up costing as much or more than solid wire with shielding gas. Everlast has produced a remarkably competitive line of MIG welders that effectively deal with many of the issues surrounding achieving quality welds with MIG. Each MIG is inverter based, which allows the MIG process to be more portable than ever. The inverter design also features a step-less design for voltage and wire speed (amp) adjustment by always allowing the setting to match the material. The design also uses digital readouts for volt and wire speed, allowin precise, repeatable settings. Additionally, each unit features inductance control (arc force) which allows the user to fine tune the arc characteristics. The heavy-duty wire drive system also feeds the wire into one of the highest quality MIG guns available on the market.

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The GMAW process (part 2):

Friday, August 19th, 2011

As already mentioned, MIG welding uses a gas or blend of gases in lieu of a flux. Usually the primary component of the gas is Argon, though CO2 is usually present for most steel applications. A triple blend of Argon, Helium and O2 may be used for Stainless Steels. While welding aluminum, pure Argon is generally used.

GMAW

GMAW

MIG is generally considered the easiest form of welding. Simply load the wire pull the trigger on the MIG gun, and weld. As long as the gun kept at a constant distance from the metal is steadily moved forward, the wire is fed automatically into the molten weld pool. How much more simple could it be? However, the confusion and misunderstanding comes in with the fact that though it is easily picked up, it is rather difficult to master. Many uniformed welders have discounted MIG welding for making weak or brittle welds. By and large, this is a rather false accusation. MIG definitely is a more rapid welding process, and does open itself up to having flaws, and voids in the weld because of it. However correctly done, MIG is just as strong as other welding processes. Though it doesn’t have the reputation of yielding pure welds like TIG welding, it can be used in almost all welding situations. The problem is that it takes correct technique and thorough metal prep to yield the best welds. Often, People who try MIG often get frustrated by the lack of fusion that can be experienced with MIG early on in the learning process and turn to the SMAW process achieve better results without as much practice. However, with correct metal prep, and technique that results from practice, a properly welded MIG weld will hold up just as well.

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T-welding

Thursday, June 23rd, 2011

T welding is a welding technique where the joint is formed in the shape of a T. It is most commonly used for components that require such a shape. The T-weld will have a base and another piece of metal that is attached to it like a T. The two pieces of metal are held together by welding either side of the T.  The joint is formed by first cleaning both the metal surfaces that are to be weld. The metal is placed on top of the base metal in a vertical manner. The right side is first weld at the joint of the two metals. The welder would then proceed to weld the left side of the metal without leaving support to the horizontal metal. This way both the sides of the metal are joined together and the vertical metal is joined to the base metal forming a T shape. This technique, as the shape of the final piece becomes, is known as T- welding.

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Part time welding jobs

Friday, June 3rd, 2011

Welding is a process or an art where two or more metal work pieces are joined together with the help of a molten solution which solidifies as a bond between them when cooled down. This is the basic definition which applies for all kinds of welding techniques out there in the industry. Eventually once the process is done, it all comes down to the quality of weld. The job you do should be in such a way that it should be as neat as possible and the joined work pieces should be as strong as possible.

Welding is a very simple process to perform. It is very easy to be learned. All you’ll have to do is attend small time courses and over a period of time with sufficient practice you can master the art. It is so easy that even a youngster new to the industry can perform it with much ease. It is fairly a good paying job as well if you are a student and looking forward to make ends meet. If you are student in engineering and you are looking forward for some practical exposure for gaining experience and at the same time earning some money for living there are several part time welding jobs available in the market.

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The significance of MIG Welding Gun

Wednesday, March 23rd, 2011

The welding gun is single most important component when it comes to welding. Without which welding becomes absolutely impossible irrespective of what kind of welding technique you pursue. Hence much care should be directed towards the welding gun when it comes to maintenance. The wire feeds through to reach the contact tip or nozzle which allows the welding arc to weld the pieces together. It is very important that the wire feeds through smoothly and comfortably. Any obstruction will cause the arc to behave inconsistently and erratically which in the end results in poor welding and wastes materials used for welding. It is necessary to have a constant arc voltage to reduce spatter.

The erratic nature is usually a result of wear and tear or dirt issues involved with the welding gun. Thus the welding gun should be thoroughly checked and maintained regularly. If the factory is located in a dusty area such as in rural ones, there are more chances of dust entering into the workshop and accumulating here and there disrupting our work by covering the equipments with dust. For this reason alone, it is important that the workshop is built with concrete floor. The drive rollers of the wire feed mechanism often gets covered with dust and spatter particles which are mostly metallic by nature. These residues work its way down the gun cable and into the liner. And over a period of time the internal resistance increases by which the wire will fail to feed the welding gun. It is important that you regularly maintain your equipments to avoid all these issues.

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Power arc welding equipment

Wednesday, March 9th, 2011

The power arc welding process is used for heavy welding applications. This process is generally used in process like shipbuilding, on the farm or for pipelines. If you are a welding enthusiasts and want to take your welding skills up another level then you should consider power arc welding.For power arc welding you should consider power arc welding. This will help you get the perfect wield on those heavy duty applications. Some of this equipment is versatile so you can also incorporate TIG welding process with the equipment. You should make sure you purchase the TIG welding package along with the power arc wielding package. This will ensure that you can carry out a variety of welding process with the equipment. Therefore if you ever decide to make your hobby a steady source of income, you will not have to purchase new equipment again. One thing that you can look out for when you are buying such equipment is make sure that your machine has the 6010 port. This port enhances the performance of the rod for such welding purposes. The new lines of DC welders are leading the market today with their optimum welding performance.The power arcs are a reliable performer that has satisfied clients from all over the world today.

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MIG welding equipment

Friday, March 4th, 2011

MIG welding is also known as metal oxide inert gas welding. It can be a semi automatic or an automatic arc welding process. There are many units available by many manufacturers today that cater to MIG welding. You should be sure as to where you choose your equipment that you want to buy from however. Normal parameters that you should look for your set up are if it is portable.

It should be able to fit in your workshop. Also the roll capacity of your equipment is important. For most operations, a 12lb machine should be good enough to keep you running back for more wire. Also if the unit has a flux core with optional drive rolls then it should be a good bargain for you.

Normally these machines also come with a spool gun that is attachable. This will help to weld materials like aluminum. Also if you are going out to buy such a machine, make sure that you look out for the arc force control feature. There are affordable pulse MIG welding machines available today. These will help in precision and also not burn a hole in your pocket at the same time. Invest reasonably and you can easily find a machine that will most benefit your wielding project.

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Precaution MIG Welders:

Friday, February 25th, 2011

MIG welding stands for Metal Inert Gas Welding. It is the most common form of industrial welding. It is also known as MAG welding which stands for Metal Active Gas Welding and Gas Metal Arc Welding (GMAW welding). When it comes to welding or joining of two or more pieces of metals, MIG welding is preferred and used. However it can be quite hazardous. Yes, it is one among the easiest welding processes to learn. However it requires serious expertise, proper training, and hard work to overcome the diverse range of industrial hurdles whose hazardous factor varies in degrees.

Most hazards are caused due to fire. Thus it is the serious cause of danger associated with MIG Welding. The light and sparks can cause damage to the eyes. In some scenarios, the damage is even permanent as the worker is even capable of losing his eye sight. So, we should always be aware and precautious when it comes to welding. We should wear protective clothes that don’t expose our bodily parts to these sparks created during the welding process. See to that you wear welding helmet before you start the process. This is mainly for protecting your eye sight from lights and sparks caused by the welding tool. Wear proper veils to protect yourself from breathing the harmful gas generated while performing the welding. The workshop should have proper ventilation and see to that, that there is always a fire extinguisher and a bucket of sand nearby while performing the task. These precautionary accessories are quite cheap as well.

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