Posts Tagged ‘MIG welders’

Wire feed welding for the beginners

Thursday, March 11th, 2010

Are you a novice welding operator who is in constant dilemma to select the best welding machine for your task? Well, your confusions can be easily cleared if you get to know about the benefits of using a wire feed welder. Usually the beginners would tend to start their welding process with either stick welder or wire feed welder. However, the wire feed welders have some benefits over stick welders.

In wire feed welders, the wire is fed in a continuous process and this initiates higher productivity. But in stick welders, you need to change electrodes during welding. Secondly, the wire welding requires only lower skill levels and can be learnt quickly while in stick welding, the coordination of hand movements is essential. These reasons make the wire welding most appropriate for the first timers.

Once you select the wire welding process, next you have to go for the type of wire welding that you need. There are two types generally; the MIG welders and flux core welders. MIG welder is capable of welding a variety of metals including thinner ones. And flux core welder would be the best if you want to weld thick materials. In addition, portability and convenience would be more in flux core welders.

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MIG Welding and its Types

Thursday, February 18th, 2010

Metal Inert Gas in short term known as MIG welding. It is popularly known as Gas Metal Arc Welding. In Mig welding process the usage of aluminum alloy wire with the combination of filler material and electrode are used by the welders. The process is one of the easiest processes that one can learn to weld. As the welder is capable of meeting all the parameters of welds with the help of machine it can also be termed as semi-automatic weld.

Mig welding can be carried on at two different processes they are:

  • Conventional Metal Inert Gas weld-
    In this process of welding it uses DC power source with constant voltage. As there is limitations for the spray transfer, for the arc current the welding has its lower limits. Since it is limited to certain range it can weld materials where the thickness being above 4 mm.
  • Pulsed Metal Inert Gas weld-
    Here the passage of DC power source is retained at low and high intervals. When the welds are done at low current welders maintain the arc without transferring metals. And during the high current passage metals are transferred in spray mode. Therefore this makes Pulsed welding process to weld at high and low heat inputs which is not possible in conventional process. And the possibility of welding thinner materials is much easier at any positions.
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MIG Welding Guide

Monday, February 1st, 2010

Mig welding is popularly known as feed welding. Metal insert gas or Gas Metal Arc Welding (GMAW) or Metal Active Gas (MAG) is one of the fastest welding techniques. The process of welding is semi-automatic or automatic arc in which a continuous and consumable wire electrode and a shielding gas are fed through a welding gun. It is mostly utilized in high production welding operations. This welding can be carried on metals such as carbon steel, stainless steel, aluminum, and copper can be welded with this process in all positions by choosing the appropriate shielding gas, electrode, and welding conditions. Due to its versatility and speed it is commonly used in automobile industry. A flow of an inert gas usually Argon gas used is passed through the welding gun at the same time as the wire electrode. The Inert gas acts as a shield, keeping air borne contaminants away from the weld zone.

Following are the advantages of MIG

  • It is highly productivity, because welders don’t have to stop to change rods or chip and brush the weld frequently.
  • The process is easy and makes great-looking welds.
  • Almost there is no cleanup required.
  • This process of weld can be carried on stainless, mild steel, and aluminum.
  • It can be weld in all positions.

The welder has to follow safety tips while welding and protect himself by wearing a welding mask, wear flame proof coats and gloves and fully covered leather shoes.

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Mig Welding: A Quick Overview

Monday, October 19th, 2009

Welding is a risky work. It can harm the person performing it in many different ways. Every manufacturer who makes the welder sells it with an instruction manual. This is an important booklet that needs to be followed to the dot. The book gives step by step orders to the welder on how to handle the apparatus. This will result in safe welding. Mig welding is also called as feed welding. It is cost efficient. Mig welders get the work done faster than any other welder. Mig Welding is most commonly preferred nowadays. The reasons for opting for a mig welder are;

  • Very simple to carry out
  • Requires lower time limit than other welders
  • It can be purchased within your means
  • Robots can be used
  • Any type of shielding gas can be utilized to get very even finishes.

Mig welders can be utilized to weld any kind of metal. It is therefore the most preferred type of welding.

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Benefits of Using MIG Welders

Wednesday, October 14th, 2009

Whether it’s for residential or commercial usage MIG is a great process. It is the easiest process to learn and practice. Most people learn to perform MIG welding in a matter of few hours. An experienced. MIG welder is preferred to operate automatic MIG welding. At home MIG welder is easy to use. It is very popular because it can be learnt with no trouble. Also, MIG welder is lot cheaper than other welding machines. Now, for some of the advantages of using a MIG welder;

  • High on productivity as it can work without any disturbance. Please avoid getting distracted. As the advantage may itself become a disadvantage for you.
  • Very easy to learn
  • Produces great welds
  • No cleanup required
  • Welds mild, stainless steel and aluminum
  • Any position welding is possible

Do not underestimate any welding machine. They are dangerous. So follow the instructions manual. Please make sure that you are fully protected before you start welding.

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Welding As A Career

Friday, July 17th, 2009

Demand for professional welding has increased in certain industries like aerospace, automobile manufacturing, pipefitting, power plants etc. Since 1994, there has been an increase in welding jobs. Most of the welders work in manufacturing, construction, or wholesale trade sector. Most of the welding jobs are done manually, but some require machinery. Welding equipments like arc, gas and flame torches can be used to perform various welding tasks. Welding can be done for any position such as flat, vertical etc.

If a person wants to become a welder, he should have good eyesight, manual dexterity, good hand-eye coordination, should be able to bend, stoop and work in awkward positions. Have the Ability to work for longer period of time and undergo training so that he /she can perform the task in a better way. If a person wants to become a welder, he should have passed high school or GED (General Education Development) and complete a formal training program. There are various training schools and institutions for welders. Various subjects in welding training include, blueprint reading, shop mathematics, mechanical drawing, physics, chemistry, metallurgy and computers. Welders should have basic knowledge in mechanics, production and processing, building and construction and also engineering and technology.

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What is MIG Welding?

Thursday, July 9th, 2009

MIG (Metal Inert Gas) welding also known as GMAW (gas metal arc welding) was developed in 1940’s for welding aluminum and other non-ferrous metals.

In MIG welding process electricity is used to melt and join pieces of metal together. It is also known as hot glue gun. MIG welding provides greater productivity because a welding operator doesn’t have to stop to change rods and brush the weld repeatedly. This process can be learnt easily and cleaning is not required. It can weld metals like stainless, mild steel and aluminum. It can weld in all positions. One major advantage of MIG welding is that metal can be welded much faster than traditional welding.

MIG welding is divided into two: Bare wire MIG and flux core welding. Bare wire mig can weld thin metals and can be cleaned soon. Flux core welding is mostly used outdoors and does not require a cylinder of mig welding gas or a flow meter.

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Have a Great Career in Welding?

Wednesday, June 24th, 2009

In a welding career you can get jobs in robotics, construction etc. A welder can earn from $15 per hour to $100 and beyond. Welding means join metal parts permanently. Welding can join beams when constructing buildings, bridges and other structures. Welder uses his skills for building automobiles, ships and in many manufacturing companies. If you have completed your high school and had some vocational training you can become a welder. If you have done your post graduation it will help you in getting better jobs. You should be good in mathematics if you want a career in welding. Welding operators should know about geometry and about angles, how to use compass and protractors. He should also have basic math skills like addition, subtraction and fraction.

The certified welder program is a performance-based program with no prerequisite courses of certification required. Final certification is being accepted universally. Welding operators need good vision and manual dexterity. They should be able to work for long hours even in uncomfortable positions. It is important that they get additional training and perform tasks in other production jobs. There is a good demand for qualified welders as they are in limited supply. Manufacturing industry employs most welding workers.

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The Basics of MIG Welder Equipment

Sunday, February 8th, 2009

The MIG or Metal Inert Gas welding process, has been called a subtype of welding to GMAW or Gas Metal Arc Welding. MIG welding usually occurs when a consumable electrode and a shielding gas are fed through a welding gun. In this article we will give a brief overview of the types of equipment used to perform MIG welding and its safety techniques.

The gas metal arc welding procedure (GMAW) is well-liked within the Industrial settings. In the sheet metal industry and the automobile industry it is used solely and entirely, in that there is no other form of welding amongst them. There are five pieces of equipment used to perform GMAW and they are:

•    The welding gun
•    The wire unit
•    Power supply
•    Electrode
•    And Shielding gas

The welding gun has a switch that the welder presses which will release the wire feed, while it sends electrical current and a stream of shielding gas. Once the operator pushes the trigger, the feed and gas will be released, producing an electric arc. It is the contact tip, that is connected to the power supply and usually transfers electricity to the electrode, while it is being aimed at the welding area.

The wire unit puts the electrode to work, when the electricity flows through it an onto the contact tip. There are some feeding units that provide a constant flow or wire and some that are considered intermittent and at different speed rates.

The GMAW or the MIG welder equipment, when it comes to power supply units are typical in that most come with a constant supply power or in their flow of current. There may be a change in the flow of current when there is some alteration in the length of the arc and may cause more heat from the process, as well.

The electrode for a MIG welding machine can vary depending on the type of material being used or the welding work being done. The decision is primarily based on the chemical properties within the material used in other words, if it will damage or tarnish the finished product, there will be another choice made in electrodes.

The shielding gas used, are like in all other types of arc welding for protection of the molten metal. But, in GMAW they do not have to use what is called flux material. Flux material, will break up or break down into a protective gas when welding. Therefore, there is no need for the usual shielding gas and has to have its own type made just for the GMAW process.

The safety measures used for the MIG welder are common for most welding practices. You would need to wear protective clothing and long sleeve jackets, you are most likely to wear the leather gloves and welding helmet too. MIG Welding is by no means a mildly safe line of work, it is highly dangerous, but if you are prone to following set guidelines and are meticulous in following rules, you should be fine.

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Overview of Metal Inert Gas (MIG) Welding

Thursday, January 8th, 2009

There are many types of welding that are available to learn today and MIG is one of those types. This type of welding dates back to 1940s when it was discovered to weld aluminum and other types of non-ferrous metals.

Many people refer to MIG welding as GMAW or gas metal arc welding. Often these two terms are used interchangeably. This type of welding is considered to be automatic or semi-automatic because it happens quickly. The process works to join two pieces of metal by continuously passing a wire through a welding gun. The wire is connected to a direct current and then passed through the gun with an inert gas like Argon.

The wire acts as an electrode and the inert gas acts as a shield as the welding is performed. This means that contaminates are air borne instead of being put into the weld zone.

An MIG welder will use this method to meld metal quicker than regular stick welding especially when they want to weld soft metals like aluminum. When this method was first started the inert gas was too expensive to do the process all the time. Today, carbon dioxide can be used instead of the more expensive gases and makes this method more cost effective.

Advantages of MIG Welding

There are several advantages of MIG welders:

  • It is faster than traditional methods of welding and it produces longer, continuous welds.
  • It produces a cleaner weld with less splatter.
  • It can be used with a wide variety of alloys and metals which makes it a versatile elder process.

Disadvantages of MIG Welding:

Although this is a very specialized process that works efficiently for many projects there are a few disadvantages that include:

  • The welding equipment is complex and bulky to use.
  • The equipment needs a source of continuous current and a constant feeding of the wire through the gun.
  • It is a very different process than traditional welding so there is a learning curve for all welders who use this technique.
  • Because of the inert gas, MIG welding cannot be used an open area because the wind would cause the gas to cause more problems for the MIG welder.

MIG welding has become very important in many industries because of its ability to weld metals quickly. You will see this type of welding done in many industries that include automobile industry and nuclear industries.

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