Posts Tagged ‘welding machines’

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The Referral Lines In Welding Symbols

Wednesday, March 31st, 2010

It’s true that it will seem all Greek and Latin while you first look at the Welding Symbols. You might no understand head or tail about those symbols but then these symbols are like a lantern in a dark way.

You may consider the Welding Symbols just like a new code language or shorthand that lets you know a lot of information on the weld that you cave to carry about and one you are exposed to these symbols and get used to them, welding will seem to be a much easier process than ever.

The first and foremost piece of weld symbols is a horizontal line and this is the one that lets you know about a lot of information and is called as the reference line. The main thing to note is that one can find that the types of weld are normally shown with a symbol to denote it. These symbols will be normally being near to the center where the reference line is there.

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Knowing About Plasma Arc Welding

Monday, March 29th, 2010

Welding is an old process but then inventions and improvements in this field are still up and happening. These days we have a lot of special equipments and different methods to carry out welding and metal cutting works depending up on our needs.

Now here we are gonna study about latest welding process that is more or less like a typical arc welding process and it is nothing but Plasma Arc Welding. The important difference between arc welding and plasma arc welding is that the electrode is directly inserted inside a small nozzle in plasma welding.

Plasma arc welding machines can be operated manually or even automatically as desired. This plasma arc welding process is something that produces thin and a very much straight line of welding. The biggest advantage of this process is that the nozzle keeps the flow without deviation and hence more accurate and powerful weld is obtained.

As the electrode is inserted inside a small nozzle, the inert shielding gas is separated and the arc becomes intensified. Plasma welding machines and processes can be manually or automatically operated. They tend to produce very straight and thin welds. The nozzle allows much less wandering of the arc compared to normal TIG and MIG welding making thin precision welds possible.

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Categorization of Welding Machines With Regards To the Power Supply

Tuesday, March 16th, 2010

As we all are informed about. Welding is nothing but a frictional process that is used to join metals and thermoplastics by means of melting and fusing them as one with the help of some power supply. A substance called as the filler, more often than not the metal or plastic of molten condition is made use of in the process of welding to grasp and fuse the work pieces as one.

Welding is a process that needs an energy source and it can be done with any kind of different energy sources. Energy sources like that of the gas flame, electric arc, laser, electron beam, friction and ultrasound are the sources that are most commonly used in Welding. In fact he source that are to be used for welding purposes mostly depends up on the material and the output. Welding machines are categorized into a constant current or that of the constant voltage. CV machine is used by gas metal arc welding and flux-cored arc welding processes. A CC machine is used to count on a preset number of amps reaching the material being welded.

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Types of Welding Machines

Thursday, October 15th, 2009

The purpose of welding is to join or bond metal parts permanently. Welding is performed in many fields for varied applications. The process involves heating of metal pieces and fusing them permanently. Welding machines are of following types;

Arc Welding Machine

Arc welders apply intense heat to melt metal and join them together. Further sown arc welding machine can be of various types such as, carbon, gas metal, gas tungsten, shielded metal, flux cored, orbital / tube, plasma, stud an submerged arc.

Fusion Welding Machines

This process utilizes a filler material to complete the weld. Their types are electron beam, hot plate, plastic, laser, oxyfuel gas, thermite/exothermic, inertia and electro slag welding machine.

Plasma Cutting Machine

This process involves the usage of high speed jet of ionized gas which aid in welding.

Resistance Welding Machine

Their types are spot, inverter, projection, seam, flash, upset, percussion and high frequency resistance welder.

Solid State Welding Machines

There are no fillers used in this process. Their types are cold, diffusion, explosion, forge, hot pressure, roll, ultrasonic, and friction welding
machine.

Other Welding Machines

Machines that are used in other welding processes are induction and thyristorised welding machine.

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Guidelines To Use The Various Types Of Welding Machines

Thursday, October 8th, 2009

Welding machines are used to blend metals. It is a difficult and hazardous job. It is very essential to know the type of welding machine that you are about to work on and follow the safety measures accordingly. Follow the below listed steps to effectively use your welding machine;

  • Select the welding machine that best suits your needs.
  • When there is no electricity go in for a machine that is motor-generated.
  • For light commercial, shop or garage welding it is safe to the machine that has an alternating current transformer. They are cheap
    and lightweight.
  • Rectifier welding machines are best when used for work that required both direct and alternating current. There is a flip switch
    that allows the user to choose the appropriate current for the task.
  • Electrode negative welding machines can be used when your task involves welding stainless steel or carbon. They are commonly used in construction work.

Most importantly, wear the right type of protective gear as specified in the
manufacturer’s manual. Be a safe welder.

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What Are Welding Machines?

Wednesday, August 19th, 2009

In simple terms, Welding refers to fabrication process that joins materials such as metals and thermoplastics. For welding different processes and energy sources are required like gas flame, electric arc, laser, electric beam, friction and ultra sound. Welding machines are classified into different categories based on welding process and equipment used during process. Some welding machines require transformers to convert high voltage, low current electricity into high current low voltage. This type of welding machine is least expensive.

Inverter based welding machines use high-power semiconductors like IGBT for handling high loads of arc welding. These machines convert electricity into high voltage and store them in a capacitor bank. The stored energy is transferred to secondary transformer for producing desired welding current.

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What You Need To Know About Welding machines

Tuesday, June 2nd, 2009

The fabrication or structural process that joints metals or thermoplastics by coalescence is known as welding. The process involves melting the work pieces to form a pool of molten material. A metal added while making the joints of through welding, brazing or soldiering is known as ‘filler metal’, is used. Various energy sources are used while welding like an electric flame or an electric arc, an electron beam, an ultrasound or even a laser.

Welding can be done industrially in any type of environment be it open air, underwater and even in outer space. In spite of the flexibility attached to the location in welding, welding is a precarious process and care must be taken to avoid burns, damage to the eyes, poisonous fumes and overexposure to ultraviolet lights. Welding done without proper precautions is unhealthy. However the use of modern technology and the necessary precautions, deaths and injuries have severely come down.

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An Overview Of The IGBT Welding Machines

Saturday, May 16th, 2009

When you look at a typical welding power supply unit, they look pretty normal and you might not think too much of them. But, in fact it took an enormous amount of engineering and scientific study to actually get them where they are today. For instance, the IGBT Welding machines have a very complicated system inside of them that we can learn more about.

They are given the acronym IGBT, which stands for; insulate gate bipolar transistor. This is a semiconductor device that is know for its ability to switch really fast. It is also known for its high efficiency and can be used in several of your household appliances.

This conductor may be found in electric cars, multi speed refrigerators and some high tech stereos. They are found in some of the newer energy efficient cars like the Prius or some of the other hybrids that are on the road today.

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